# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.

import ast
import json
from collections import defaultdict
from datetime import timedelta, datetime
from random import randint

from odoo import api, Command, fields, models, tools, SUPERUSER_ID, _, _lt
from odoo.addons.web_editor.controllers.main import handle_history_divergence
from odoo.exceptions import UserError, ValidationError, AccessError
from odoo.tools import format_amount
from odoo.osv.expression import OR, TRUE_LEAF, FALSE_LEAF

from .project_task_recurrence import DAYS, WEEKS
from .project_update import STATUS_COLOR


PROJECT_TASK_READABLE_FIELDS = {
    'id',
    'active',
    'description',
    'priority',
    'kanban_state_label',
    'project_id',
    'display_project_id',
    'color',
    'partner_is_company',
    'commercial_partner_id',
    'allow_subtasks',
    'subtask_count',
    'child_text',
    'is_closed',
    'email_from',
    'create_date',
    'write_date',
    'company_id',
    'displayed_image_id',
    'display_name',
    'portal_user_names',
    'legend_normal',
    'legend_blocked',
    'legend_done',
    'user_ids',
}

PROJECT_TASK_WRITABLE_FIELDS = {
    'name',
    'partner_id',
    'date_deadline',
    'tag_ids',
    'sequence',
    'stage_id',
    'kanban_state',
    'child_ids',
    'parent_id',
    'priority',
}

class ProjectTaskType(models.Model):
    _name = 'project.task.type'
    _description = 'Task Stage'
    _order = 'sequence, id'

    def _get_default_project_ids(self):
        default_project_id = self.env.context.get('default_project_id')
        return [default_project_id] if default_project_id else None

    active = fields.Boolean('Active', default=True)
    name = fields.Char(string='Name', required=True, translate=True)
    description = fields.Text(translate=True)
    sequence = fields.Integer(default=1)
    project_ids = fields.Many2many('project.project', 'project_task_type_rel', 'type_id', 'project_id', string='Projects',
        default=_get_default_project_ids)
    legend_blocked = fields.Char(
        'Red Kanban Label', default=lambda s: _('Blocked'), translate=True, required=True,
        help='Override the default value displayed for the blocked state for kanban selection when the task or issue is in that stage.')
    legend_done = fields.Char(
        'Green Kanban Label', default=lambda s: _('Ready'), translate=True, required=True,
        help='Override the default value displayed for the done state for kanban selection when the task or issue is in that stage.')
    legend_normal = fields.Char(
        'Grey Kanban Label', default=lambda s: _('In Progress'), translate=True, required=True,
        help='Override the default value displayed for the normal state for kanban selection when the task or issue is in that stage.')
    mail_template_id = fields.Many2one(
        'mail.template',
        string='Email Template',
        domain=[('model', '=', 'project.task')],
        help="If set, an email will be sent to the customer when the task or issue reaches this step.")
    fold = fields.Boolean(string='Folded in Kanban',
        help='This stage is folded in the kanban view when there are no records in that stage to display.')
    rating_template_id = fields.Many2one(
        'mail.template',
        string='Rating Email Template',
        domain=[('model', '=', 'project.task')],
        help="If set and if the project's rating configuration is 'Rating when changing stage', then an email will be sent to the customer when the task reaches this step.")
    auto_validation_kanban_state = fields.Boolean('Automatic kanban status', default=False,
        help="Automatically modify the kanban state when the customer replies to the feedback for this stage.\n"
            " * Good feedback from the customer will update the kanban state to 'ready for the new stage' (green bullet).\n"
            " * Neutral or bad feedback will set the kanban state to 'blocked' (red bullet).\n")
    is_closed = fields.Boolean('Closing Stage', help="Tasks in this stage are considered as closed.")
    disabled_rating_warning = fields.Text(compute='_compute_disabled_rating_warning')

    user_id = fields.Many2one('res.users', 'Stage Owner', index=True)

    def unlink_wizard(self, stage_view=False):
        self = self.with_context(active_test=False)
        # retrieves all the projects with a least 1 task in that stage
        # a task can be in a stage even if the project is not assigned to the stage
        readgroup = self.with_context(active_test=False).env['project.task'].read_group([('stage_id', 'in', self.ids)], ['project_id'], ['project_id'])
        project_ids = list(set([project['project_id'][0] for project in readgroup] + self.project_ids.ids))

        wizard = self.with_context(project_ids=project_ids).env['project.task.type.delete.wizard'].create({
            'project_ids': project_ids,
            'stage_ids': self.ids
        })

        context = dict(self.env.context)
        context['stage_view'] = stage_view
        return {
            'name': _('Delete Stage'),
            'view_mode': 'form',
            'res_model': 'project.task.type.delete.wizard',
            'views': [(self.env.ref('project.view_project_task_type_delete_wizard').id, 'form')],
            'type': 'ir.actions.act_window',
            'res_id': wizard.id,
            'target': 'new',
            'context': context,
        }

    def write(self, vals):
        if 'active' in vals and not vals['active']:
            self.env['project.task'].search([('stage_id', 'in', self.ids)]).write({'active': False})
        return super(ProjectTaskType, self).write(vals)

    @api.depends('project_ids', 'project_ids.rating_active')
    def _compute_disabled_rating_warning(self):
        for stage in self:
            disabled_projects = stage.project_ids.filtered(lambda p: not p.rating_active)
            if disabled_projects:
                stage.disabled_rating_warning = '\n'.join('- %s' % p.name for p in disabled_projects)
            else:
                stage.disabled_rating_warning = False

    @api.constrains('user_id', 'project_ids')
    def _check_personal_stage_not_linked_to_projects(self):
        if any(stage.user_id and stage.project_ids for stage in self):
            raise UserError(_('A personal stage cannot be linked to a project because it is only visible to its corresponding user.'))

    def remove_personal_stage(self):
        """
        Remove a personal stage, tasks using that stage will move to the first
        stage with a lower priority if it exists higher if not.
        This method will not allow to delete the last personal stage.
        Having no personal_stage_type_id makes the task not appear when grouping by personal stage.
        """
        self.ensure_one()
        assert self.user_id == self.env.user or self.env.su

        users_personal_stages = self.env['project.task.type']\
            .search([('user_id', '=', self.user_id.id)], order='sequence DESC')
        if len(users_personal_stages) == 1:
            raise ValidationError(_("You should at least have one personal stage. Create a new stage to which the tasks can be transferred after this one is deleted."))

        # Find the most suitable stage, they are already sorted by sequence
        new_stage = self.env['project.task.type']
        for stage in users_personal_stages:
            if stage == self:
                continue
            if stage.sequence > self.sequence:
                new_stage = stage
            elif stage.sequence <= self.sequence:
                new_stage = stage
                break

        self.env['project.task.stage.personal'].search([('stage_id', '=', self.id)]).write({
            'stage_id': new_stage.id,
        })
        self.unlink()

class Project(models.Model):
    _name = "project.project"
    _description = "Project"
    _inherit = ['portal.mixin', 'mail.alias.mixin', 'mail.thread', 'mail.activity.mixin', 'rating.parent.mixin']
    _order = "sequence, name, id"
    _rating_satisfaction_days = False  # takes all existing ratings
    _check_company_auto = True

    def _compute_attached_docs_count(self):
        self.env.cr.execute(
            """
            WITH docs AS (
                 SELECT res_id as id, count(*) as count
                   FROM ir_attachment
                  WHERE res_model = 'project.project'
                    AND res_id IN %(project_ids)s
               GROUP BY res_id

              UNION ALL

                 SELECT t.project_id as id, count(*) as count
                   FROM ir_attachment a
                   JOIN project_task t ON a.res_model = 'project.task' AND a.res_id = t.id
                  WHERE t.project_id IN %(project_ids)s
               GROUP BY t.project_id
            )
            SELECT id, sum(count)
              FROM docs
          GROUP BY id
            """,
            {"project_ids": tuple(self.ids)}
        )
        docs_count = dict(self.env.cr.fetchall())
        for project in self:
            project.doc_count = docs_count.get(project.id, 0)

    def _compute_task_count(self):
        task_data = self.env['project.task'].read_group(
            [('project_id', 'in', self.ids),
             '|',
                ('stage_id.fold', '=', False),
                ('stage_id', '=', False)],
            ['project_id', 'display_project_id:count'], ['project_id'])
        result_wo_subtask = defaultdict(int)
        result_with_subtasks = defaultdict(int)
        for data in task_data:
            result_wo_subtask[data['project_id'][0]] += data['display_project_id']
            result_with_subtasks[data['project_id'][0]] += data['project_id_count']
        for project in self:
            project.task_count = result_wo_subtask[project.id]
            project.task_count_with_subtasks = result_with_subtasks[project.id]

    def attachment_tree_view(self):
        action = self.env['ir.actions.act_window']._for_xml_id('base.action_attachment')
        action['domain'] = str([
            '|',
            '&',
            ('res_model', '=', 'project.project'),
            ('res_id', 'in', self.ids),
            '&',
            ('res_model', '=', 'project.task'),
            ('res_id', 'in', self.task_ids.ids)
        ])
        action['context'] = "{'default_res_model': '%s','default_res_id': %d}" % (self._name, self.id)
        return action

    def _default_stage_id(self):
        # Since project stages are order by sequence first, this should fetch the one with the lowest sequence number.
        return self.env['project.project.stage'].search([], limit=1)

    def _compute_is_favorite(self):
        for project in self:
            project.is_favorite = self.env.user in project.favorite_user_ids

    def _inverse_is_favorite(self):
        favorite_projects = not_fav_projects = self.env['project.project'].sudo()
        for project in self:
            if self.env.user in project.favorite_user_ids:
                favorite_projects |= project
            else:
                not_fav_projects |= project

        # Project User has no write access for project.
        not_fav_projects.write({'favorite_user_ids': [(4, self.env.uid)]})
        favorite_projects.write({'favorite_user_ids': [(3, self.env.uid)]})

    def _get_default_favorite_user_ids(self):
        return [(6, 0, [self.env.uid])]

    @api.model
    def _read_group_stage_ids(self, stages, domain, order):
        return self.env['project.project.stage'].search([], order=order)

    name = fields.Char("Name", index=True, required=True, tracking=True, translate=True)
    description = fields.Html()
    active = fields.Boolean(default=True,
        help="If the active field is set to False, it will allow you to hide the project without removing it.")
    sequence = fields.Integer(default=10, help="Gives the sequence order when displaying a list of Projects.")
    partner_id = fields.Many2one('res.partner', string='Customer', auto_join=True, tracking=True, domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]")
    partner_email = fields.Char(
        compute='_compute_partner_email', inverse='_inverse_partner_email',
        string='Email', readonly=False, store=True, copy=False)
    partner_phone = fields.Char(
        compute='_compute_partner_phone', inverse='_inverse_partner_phone',
        string="Phone", readonly=False, store=True, copy=False)
    commercial_partner_id = fields.Many2one(related="partner_id.commercial_partner_id")
    company_id = fields.Many2one('res.company', string='Company', required=True, default=lambda self: self.env.company)
    currency_id = fields.Many2one('res.currency', related="company_id.currency_id", string="Currency", readonly=True)
    analytic_account_id = fields.Many2one('account.analytic.account', string="Analytic Account", copy=False, ondelete='set null',
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]", check_company=True,
        help="Analytic account to which this project is linked for financial management. "
             "Use an analytic account to record cost and revenue on your project.")
    analytic_account_balance = fields.Monetary(related="analytic_account_id.balance")

    favorite_user_ids = fields.Many2many(
        'res.users', 'project_favorite_user_rel', 'project_id', 'user_id',
        default=_get_default_favorite_user_ids,
        string='Members')
    is_favorite = fields.Boolean(compute='_compute_is_favorite', inverse='_inverse_is_favorite',
        string='Show Project on Dashboard',
        help="Whether this project should be displayed on your dashboard.")
    label_tasks = fields.Char(string='Use Tasks as', default='Tasks', help="Label used for the tasks of the project.", translate=True)
    tasks = fields.One2many('project.task', 'project_id', string="Task Activities")
    resource_calendar_id = fields.Many2one(
        'resource.calendar', string='Working Time',
        related='company_id.resource_calendar_id')
    type_ids = fields.Many2many('project.task.type', 'project_task_type_rel', 'project_id', 'type_id', string='Tasks Stages')
    task_count = fields.Integer(compute='_compute_task_count', string="Task Count")
    task_count_with_subtasks = fields.Integer(compute='_compute_task_count')
    task_ids = fields.One2many('project.task', 'project_id', string='Tasks',
                               domain=['|', ('stage_id.fold', '=', False), ('stage_id', '=', False)])
    color = fields.Integer(string='Color Index')
    user_id = fields.Many2one('res.users', string='Project Manager', default=lambda self: self.env.user, tracking=True)
    alias_enabled = fields.Boolean(string='Use Email Alias', compute='_compute_alias_enabled', readonly=False)
    alias_id = fields.Many2one('mail.alias', string='Alias', ondelete="restrict", required=True,
        help="Internal email associated with this project. Incoming emails are automatically synchronized "
             "with Tasks (or optionally Issues if the Issue Tracker module is installed).")
    alias_value = fields.Char(string='Alias email', compute='_compute_alias_value')
    privacy_visibility = fields.Selection([
            ('followers', 'Invited employees'),
            ('employees', 'All employees'),
            ('portal', 'Invited portal users and all employees'),
        ],
        string='Visibility', required=True,
        default='portal',
        help="People to whom this project and its tasks will be visible.\n\n"
            "- Invited internal users: when following a project, internal users will get access to all of its tasks without distinction. "
            "Otherwise, they will only get access to the specific tasks they are following.\n "
            "A user with the project > administrator access right level can still access this project and its tasks, even if they are not explicitly part of the followers.\n\n"
            "- All internal users: all internal users can access the project and all of its tasks without distinction.\n\n"
            "- Invited portal users and all internal users: all internal users can access the project and all of its tasks without distinction.\n"
            "When following a project, portal users will get access to all of its tasks without distinction. Otherwise, they will only get access to the specific tasks they are following.\n\n"
            "When a project is shared in read-only, the portal user is redirected to their portal. They can view the tasks, but not edit them.\n"
            "When a project is shared in edit, the portal user is redirected to the kanban and list views of the tasks. They can modify a selected number of fields on the tasks.\n\n"
            "In any case, an internal user with no project access rights can still access a task, "
            "provided that they are given the corresponding URL (and that they are part of the followers if the project is private).")
    doc_count = fields.Integer(compute='_compute_attached_docs_count', string="Number of documents attached")
    date_start = fields.Date(string='Start Date')
    date = fields.Date(string='Expiration Date', index=True, tracking=True)
    allow_subtasks = fields.Boolean('Sub-tasks', default=lambda self: self.env.user.has_group('project.group_subtask_project'))
    allow_recurring_tasks = fields.Boolean('Recurring Tasks', default=lambda self: self.env.user.has_group('project.group_project_recurring_tasks'))
    allow_task_dependencies = fields.Boolean('Task Dependencies', default=lambda self: self.env.user.has_group('project.group_project_task_dependencies'))
    tag_ids = fields.Many2many('project.tags', relation='project_project_project_tags_rel', string='Tags')

    # Project Sharing fields
    collaborator_ids = fields.One2many('project.collaborator', 'project_id', string='Collaborators', copy=False)
    collaborator_count = fields.Integer('# Collaborators', compute='_compute_collaborator_count', compute_sudo=True)

    # rating fields
    rating_request_deadline = fields.Datetime(compute='_compute_rating_request_deadline', store=True)
    rating_active = fields.Boolean('Customer Ratings', default=lambda self: self.env.user.has_group('project.group_project_rating'))
    rating_status = fields.Selection(
        [('stage', 'Rating when changing stage'),
         ('periodic', 'Periodic rating')
        ], 'Customer Ratings Status', default="stage", required=True,
        help="How to get customer feedback?\n"
             "- Rating when changing stage: an email will be sent when a task is pulled to another stage.\n"
             "- Periodic rating: an email will be sent periodically.\n\n"
             "Don't forget to set up the email templates on the stages for which you want to get customer feedback.")
    rating_status_period = fields.Selection([
        ('daily', 'Daily'),
        ('weekly', 'Weekly'),
        ('bimonthly', 'Twice a Month'),
        ('monthly', 'Once a Month'),
        ('quarterly', 'Quarterly'),
        ('yearly', 'Yearly')], 'Rating Frequency', required=True, default='monthly')

    # Not `required` since this is an option to enable in project settings.
    stage_id = fields.Many2one('project.project.stage', string='Stage', ondelete='restrict', groups="project.group_project_stages",
        tracking=True, index=True, copy=False, default=_default_stage_id, group_expand='_read_group_stage_ids')

    update_ids = fields.One2many('project.update', 'project_id')
    last_update_id = fields.Many2one('project.update', string='Last Update', copy=False)
    last_update_status = fields.Selection(selection=[
        ('on_track', 'On Track'),
        ('at_risk', 'At Risk'),
        ('off_track', 'Off Track'),
        ('on_hold', 'On Hold')
    ], default='on_track', compute='_compute_last_update_status', store=True)
    last_update_color = fields.Integer(compute='_compute_last_update_color')
    milestone_ids = fields.One2many('project.milestone', 'project_id')
    milestone_count = fields.Integer(compute='_compute_milestone_count')

    _sql_constraints = [
        ('project_date_greater', 'check(date >= date_start)', 'Error! Project start date must be before project end date.')
    ]

    @api.depends('partner_id.email')
    def _compute_partner_email(self):
        for project in self:
            if project.partner_id and project.partner_id.email != project.partner_email:
                project.partner_email = project.partner_id.email

    def _inverse_partner_email(self):
        for project in self:
            if project.partner_id and project.partner_email != project.partner_id.email:
                project.partner_id.email = project.partner_email

    @api.depends('partner_id.phone')
    def _compute_partner_phone(self):
        for project in self:
            if project.partner_id and project.partner_phone != project.partner_id.phone:
                project.partner_phone = project.partner_id.phone

    def _inverse_partner_phone(self):
        for project in self:
            if project.partner_id and project.partner_phone != project.partner_id.phone:
                project.partner_id.phone = project.partner_phone

    @api.onchange('alias_enabled')
    def _onchange_alias_name(self):
        if not self.alias_enabled:
            self.alias_name = False

    def _compute_alias_enabled(self):
        for project in self:
            project.alias_enabled = project.alias_domain and project.alias_id.alias_name

    def _compute_access_url(self):
        super(Project, self)._compute_access_url()
        for project in self:
            project.access_url = '/my/project/%s' % project.id

    def _compute_access_warning(self):
        super(Project, self)._compute_access_warning()
        for project in self.filtered(lambda x: x.privacy_visibility != 'portal'):
            project.access_warning = _(
                "The project cannot be shared with the recipient(s) because the privacy of the project is too restricted. Set the privacy to 'Visible by following customers' in order to make it accessible by the recipient(s).")

    @api.depends('rating_status', 'rating_status_period')
    def _compute_rating_request_deadline(self):
        periods = {'daily': 1, 'weekly': 7, 'bimonthly': 15, 'monthly': 30, 'quarterly': 90, 'yearly': 365}
        for project in self:
            project.rating_request_deadline = fields.datetime.now() + timedelta(days=periods.get(project.rating_status_period, 0))

    @api.depends('last_update_id.status')
    def _compute_last_update_status(self):
        for project in self:
            project.last_update_status = project.last_update_id.status or 'on_track'

    @api.depends('last_update_status')
    def _compute_last_update_color(self):
        for project in self:
            project.last_update_color = STATUS_COLOR[project.last_update_status]

    @api.depends('milestone_ids')
    def _compute_milestone_count(self):
        read_group = self.env['project.milestone'].read_group([('project_id', 'in', self.ids)], ['project_id'], ['project_id'])
        mapped_count = {group['project_id'][0]: group['project_id_count'] for group in read_group}
        for project in self:
            project.milestone_count = mapped_count.get(project.id, 0)

    @api.depends('alias_name', 'alias_domain')
    def _compute_alias_value(self):
        for project in self:
            if not project.alias_name or not project.alias_domain:
                project.alias_value = ''
            else:
                project.alias_value = "%s@%s" % (project.alias_name, project.alias_domain)

    @api.depends('collaborator_ids', 'privacy_visibility')
    def _compute_collaborator_count(self):
        project_sharings = self.filtered(lambda project: project.privacy_visibility == 'portal')
        collaborator_read_group = self.env['project.collaborator'].read_group(
            [('project_id', 'in', project_sharings.ids)],
            ['project_id'],
            ['project_id'],
        )
        collaborator_count_by_project = {res['project_id'][0]: res['project_id_count'] for res in collaborator_read_group}
        for project in self:
            project.collaborator_count = collaborator_count_by_project.get(project.id, 0)

    @api.model
    def _map_tasks_default_valeus(self, task, project):
        """ get the default value for the copied task on project duplication """
        return {
            'stage_id': task.stage_id.id,
            'name': task.name,
            'company_id': project.company_id.id,
        }

    def map_tasks(self, new_project_id):
        """ copy and map tasks from old to new project """
        self.ensure_one()
        project = self.browse(new_project_id)
        tasks = self.env['project.task']
        # We want to copy archived task, but do not propagate an active_test context key
        task_ids = self.env['project.task'].with_context(active_test=False).search([('project_id', '=', self.id)], order='parent_id').ids
        old_to_new_tasks = {}
        all_tasks = self.env['project.task'].browse(task_ids)
        for task in all_tasks:
            # preserve task name and stage, normally altered during copy
            defaults = self._map_tasks_default_valeus(task, project)
            if task.parent_id:
                # set the parent to the duplicated task
                parent_id = old_to_new_tasks.get(task.parent_id.id, False)
                defaults['parent_id'] = parent_id
                if not parent_id or task.display_project_id:
                    defaults['project_id'] = project.id if task.display_project_id == self else False
                    defaults['display_project_id'] = project.id if task.display_project_id == self else False
            elif task.display_project_id == self:
                defaults['project_id'] = project.id
                defaults['display_project_id'] = project.id
            new_task = task.copy(defaults)
            # If child are created before parent (ex sub_sub_tasks)
            new_child_ids = [old_to_new_tasks[child.id] for child in task.child_ids if child.id in old_to_new_tasks]
            tasks.browse(new_child_ids).write({'parent_id': new_task.id})
            old_to_new_tasks[task.id] = new_task.id
            if task.allow_task_dependencies:
                depend_on_ids = [t.id if t not in all_tasks else old_to_new_tasks.get(t.id, None) for t in
                                 task.depend_on_ids]
                new_task.write({'depend_on_ids': [Command.link(tid) for tid in depend_on_ids if tid]})
                dependent_ids = [t.id if t not in all_tasks else old_to_new_tasks.get(t.id, None) for t in
                                 task.dependent_ids]
                new_task.write({'dependent_ids': [Command.link(tid) for tid in dependent_ids if tid]})
            tasks += new_task

        return project.write({'tasks': [(6, 0, tasks.ids)]})

    @api.returns('self', lambda value: value.id)
    def copy(self, default=None):
        if default is None:
            default = {}
        if not default.get('name'):
            default['name'] = _("%s (copy)") % (self.name)
        project = super(Project, self).copy(default)
        for follower in self.message_follower_ids:
            project.message_subscribe(partner_ids=follower.partner_id.ids, subtype_ids=follower.subtype_ids.ids)
        if 'tasks' not in default:
            self.map_tasks(project.id)
        return project

    @api.model
    def create(self, vals):
        # Prevent double project creation
        self = self.with_context(mail_create_nosubscribe=True)
        project = super(Project, self).create(vals)
        if project.privacy_visibility == 'portal' and project.partner_id:
            project.message_subscribe(project.partner_id.ids)
        return project

    def write(self, vals):
        # directly compute is_favorite to dodge allow write access right
        if 'is_favorite' in vals:
            vals.pop('is_favorite')
            self._fields['is_favorite'].determine_inverse(self)
        res = super(Project, self).write(vals) if vals else True

        if 'allow_recurring_tasks' in vals and not vals.get('allow_recurring_tasks'):
            self.env['project.task'].search([('project_id', 'in', self.ids), ('recurring_task', '=', True)]).write({'recurring_task': False})

        if 'active' in vals:
            # archiving/unarchiving a project does it on its tasks, too
            self.with_context(active_test=False).mapped('tasks').write({'active': vals['active']})
        if vals.get('partner_id') or vals.get('privacy_visibility'):
            for project in self.filtered(lambda project: project.privacy_visibility == 'portal'):
                project.message_subscribe(project.partner_id.ids)
        if vals.get('privacy_visibility'):
            self._change_privacy_visibility()
        if 'name' in vals and self.analytic_account_id:
            projects_read_group = self.env['project.project'].read_group(
                [('analytic_account_id', 'in', self.analytic_account_id.ids)],
                ['analytic_account_id'],
                ['analytic_account_id']
            )
            analytic_account_to_update = self.env['account.analytic.account'].browse([
                res['analytic_account_id'][0]
                for res in projects_read_group
                if res['analytic_account_id'] and res['analytic_account_id_count'] == 1
            ])
            analytic_account_to_update.write({'name': self.name})
        return res

    def action_unlink(self):
        wizard = self.env['project.delete.wizard'].create({
            'project_ids': self.ids
        })

        return {
            'name': _('Confirmation'),
            'view_mode': 'form',
            'res_model': 'project.delete.wizard',
            'views': [(self.env.ref('project.project_delete_wizard_form').id, 'form')],
            'type': 'ir.actions.act_window',
            'res_id': wizard.id,
            'target': 'new',
            'context': self.env.context,
        }

    @api.ondelete(at_uninstall=False)
    def _unlink_except_contains_tasks(self):
        # Check project is empty
        for project in self.with_context(active_test=False):
            if project.tasks:
                raise UserError(_('You cannot delete a project containing tasks. You can either archive it or first delete all of its tasks.'))

    def unlink(self):
        # Delete the empty related analytic account
        analytic_accounts_to_delete = self.env['account.analytic.account']
        for project in self:
            if project.analytic_account_id and not project.analytic_account_id.line_ids:
                analytic_accounts_to_delete |= project.analytic_account_id
        result = super(Project, self).unlink()
        analytic_accounts_to_delete.unlink()
        return result

    def message_subscribe(self, partner_ids=None, subtype_ids=None):
        """
        Subscribe to all existing active tasks when subscribing to a project
        """
        res = super(Project, self).message_subscribe(partner_ids=partner_ids, subtype_ids=subtype_ids)
        project_subtypes = self.env['mail.message.subtype'].browse(subtype_ids) if subtype_ids else None
        task_subtypes = (project_subtypes.mapped('parent_id') | project_subtypes.filtered(lambda sub: sub.internal or sub.default)).ids if project_subtypes else None
        if not subtype_ids or task_subtypes:
            self.mapped('tasks').message_subscribe(
                partner_ids=partner_ids, subtype_ids=task_subtypes)
        return res

    def message_unsubscribe(self, partner_ids=None):
        """ Unsubscribe from all tasks when unsubscribing from a project """
        self.mapped('tasks').message_unsubscribe(partner_ids=partner_ids)
        return super(Project, self).message_unsubscribe(partner_ids=partner_ids)

    def _alias_get_creation_values(self):
        values = super(Project, self)._alias_get_creation_values()
        values['alias_model_id'] = self.env['ir.model']._get('project.task').id
        if self.id:
            values['alias_defaults'] = defaults = ast.literal_eval(self.alias_defaults or "{}")
            defaults['project_id'] = self.id
        return values

    # ---------------------------------------------------
    # Mail gateway
    # ---------------------------------------------------

    def _track_template(self, changes):
        res = super()._track_template(changes)
        project = self[0]
        if self.user_has_groups('project.group_project_stages') and 'stage_id' in changes and project.stage_id.mail_template_id:
            res['stage_id'] = (project.stage_id.mail_template_id, {
                'auto_delete_message': True,
                'subtype_id': self.env['ir.model.data']._xmlid_to_res_id('mail.mt_note'),
                'email_layout_xmlid': 'mail.mail_notification_light',
            })
        return res

    def _track_subtype(self, init_values):
        self.ensure_one()
        if 'stage_id' in init_values:
            return self.env.ref('project.mt_project_stage_change')
        return super()._track_subtype(init_values)

    def _mail_get_message_subtypes(self):
        res = super()._mail_get_message_subtypes()
        if len(self) == 1:
            dependency_subtype = self.env.ref('project.mt_project_task_dependency_change')
            if not self.allow_task_dependencies and dependency_subtype in res:
                res -= dependency_subtype
        return res

    # ---------------------------------------------------
    #  Actions
    # ---------------------------------------------------

    def toggle_favorite(self):
        favorite_projects = not_fav_projects = self.env['project.project'].sudo()
        for project in self:
            if self.env.user in project.favorite_user_ids:
                favorite_projects |= project
            else:
                not_fav_projects |= project

        # Project User has no write access for project.
        not_fav_projects.write({'favorite_user_ids': [(4, self.env.uid)]})
        favorite_projects.write({'favorite_user_ids': [(3, self.env.uid)]})

    def action_view_tasks(self):
        action = self.with_context(active_id=self.id, active_ids=self.ids) \
            .env.ref('project.act_project_project_2_project_task_all') \
            .sudo().read()[0]
        action['display_name'] = self.name
        return action

    def action_view_all_rating(self):
        """ return the action to see all the rating of the project and activate default filters"""
        action = self.env['ir.actions.act_window']._for_xml_id('project.rating_rating_action_view_project_rating')
        action['name'] = _('Ratings of %s') % (self.name,)
        action_context = ast.literal_eval(action['context']) if action['context'] else {}
        action_context.update(self._context)
        action_context['search_default_parent_res_name'] = self.name
        action_context.pop('group_by', None)
        return dict(action, context=action_context)

    def action_view_tasks_analysis(self):
        """ return the action to see the tasks analysis report of the project """
        action = self.env['ir.actions.act_window']._for_xml_id('project.action_project_task_user_tree')
        action_context = ast.literal_eval(action['context']) if action['context'] else {}
        action_context['search_default_project_id'] = self.id
        return dict(action, context=action_context)

    @api.model
    def _action_open_all_projects(self):
        action = self.env['ir.actions.act_window']._for_xml_id(
            'project.open_view_project_all' if not self.user_has_groups('project.group_project_stages') else
            'project.open_view_project_all_group_stage')
        return action

    def action_view_analytic_account_entries(self):
        self.ensure_one()
        return {
            'res_model': 'account.analytic.line',
            'type': 'ir.actions.act_window',
            'name': _("Gross Margin"),
            'domain': [('account_id', '=', self.analytic_account_id.id)],
            'views': [(self.env.ref('analytic.view_account_analytic_line_tree').id, 'list'),
                      (self.env.ref('analytic.view_account_analytic_line_form').id, 'form'),
                      (self.env.ref('analytic.view_account_analytic_line_graph').id, 'graph'),
                      (self.env.ref('analytic.view_account_analytic_line_pivot').id, 'pivot')],
            'view_mode': 'tree,form,graph,pivot',
            'context': {'search_default_group_date': 1, 'default_account_id': self.analytic_account_id.id}
        }

    def action_view_kanban_project(self):
        # [XBO] TODO: remove me in master
        return

    # ---------------------------------------------
    #  PROJECT UPDATES
    # ---------------------------------------------

    def get_last_update_or_default(self):
        self.ensure_one()
        labels = dict(self._fields['last_update_status']._description_selection(self.env))
        return {
            'status': labels[self.last_update_status],
            'color': self.last_update_color,
        }

    def get_panel_data(self):
        self.ensure_one()
        return {
            'user': self._get_user_values(),
            'tasks_analysis': self._get_tasks_analysis(),
            'milestones': self._get_milestones(),
            'buttons': sorted(self._get_stat_buttons(), key=lambda k: k['sequence']),
        }

    def _get_user_values(self):
        return {
            'is_project_user': self.user_has_groups('project.group_project_user'),
        }

    def _get_tasks_analysis(self):
        # Deprecated
        return {
            'data': [],
        }

    def _get_milestones(self):
        self.ensure_one()
        return {
            'data': self.milestone_ids._get_data_list(),
        }

    def _get_stat_buttons(self):
        self.ensure_one()
        buttons = [{
            'icon': 'tasks',
            'text': _lt('Tasks'),
            'number': self.task_count,
            'action_type': 'action',
            'action': 'project.act_project_project_2_project_task_all',
            'additional_context': json.dumps({
                'active_id': self.id,
            }),
            'show': True,
            'sequence': 2,
        }]
        if self.user_has_groups('project.group_project_rating'):
            buttons.append({
                'icon': 'smile-o',
                'text': _lt('Customer Satisfaction'),
                'number': '%s %%' % (self.rating_percentage_satisfaction),
                'action_type': 'object',
                'action': 'action_view_all_rating',
                'show': self.rating_active and self.rating_percentage_satisfaction > -1,
                'sequence': 5,
            })
        if self.user_has_groups('project.group_project_manager'):
            buttons.append({
                'icon': 'area-chart',
                'text': _lt('Burndown Chart'),
                'action_type': 'action',
                'action': 'project.action_project_task_burndown_chart_report',
                'additional_context': json.dumps({
                    'active_id': self.id,
                }),
                'show': True,
                'sequence': 7,
            })
            buttons.append({
                'icon': 'users',
                'text': _lt('Collaborators'),
                'number': self.collaborator_count,
                'action_type': 'action',
                'action': 'project.project_collaborator_action',
                'additional_context': json.dumps({
                    'active_id': self.id,
                }),
                'show': True,
                'sequence': 23,
            })
        if self.user_has_groups('analytic.group_analytic_accounting'):
            buttons.append({
                'icon': 'usd',
                'text': _lt('Gross Margin'),
                'number': format_amount(self.env, self.analytic_account_balance, self.company_id.currency_id),
                'action_type': 'object',
                'action': 'action_view_analytic_account_entries',
                'show': bool(self.analytic_account_id),
                'sequence': 18,
            })
        return buttons

    def _get_tasks_analysis_counts(self, created=False, updated=False):
        # Deprecated
        return {}

    # ---------------------------------------------------
    #  Business Methods
    # ---------------------------------------------------

    @api.model
    def _create_analytic_account_from_values(self, values):
        analytic_account = self.env['account.analytic.account'].create({
            'name': values.get('name', _('Unknown Analytic Account')),
            'company_id': values.get('company_id') or self.env.company.id,
            'partner_id': values.get('partner_id'),
            'active': True,
        })
        return analytic_account

    def _create_analytic_account(self):
        for project in self:
            analytic_account = self.env['account.analytic.account'].create({
                'name': project.name,
                'company_id': project.company_id.id,
                'partner_id': project.partner_id.id,
                'active': True,
            })
            project.write({'analytic_account_id': analytic_account.id})

    # ---------------------------------------------------
    # Rating business
    # ---------------------------------------------------

    # This method should be called once a day by the scheduler
    @api.model
    def _send_rating_all(self):
        projects = self.search([
            ('rating_active', '=', True),
            ('rating_status', '=', 'periodic'),
            ('rating_request_deadline', '<=', fields.Datetime.now())
        ])
        for project in projects:
            project.task_ids._send_task_rating_mail()
            project._compute_rating_request_deadline()
            self.env.cr.commit()

    # ---------------------------------------------------
    # Privacy
    # ---------------------------------------------------

    def _change_privacy_visibility(self):
        """
        Unsubscribe non-internal users from the project and tasks if the project privacy visibility
        goes to a value different than 'portal'
        """
        for project in self.filtered(lambda p: p.privacy_visibility != 'portal'):
            portal_users = project.message_partner_ids.user_ids.filtered('share')
            project.message_unsubscribe(partner_ids=portal_users.partner_id.ids)
            project.mapped('tasks')._change_project_privacy_visibility()

    # ---------------------------------------------------
    # Project sharing
    # ---------------------------------------------------
    def _check_project_sharing_access(self):
        self.ensure_one()
        if self.privacy_visibility != 'portal':
            return False
        if self.env.user.has_group('base.group_portal'):
            return self.env['project.collaborator'].search([('project_id', '=', self.sudo().id), ('partner_id', '=', self.env.user.partner_id.id)])
        return self.env.user.has_group('base.group_user')

    def _add_collaborators(self, partners):
        self.ensure_one()
        user_group_id = self.env['ir.model.data']._xmlid_to_res_id('base.group_user')
        all_collaborators = self.collaborator_ids.partner_id
        new_collaborators = partners.filtered(
            lambda partner:
                partner not in all_collaborators
                and (not partner.user_ids or user_group_id not in partner.user_ids[0].groups_id.ids)
        )
        if not new_collaborators:
            # Then we have nothing to do
            return
        self.write({'collaborator_ids': [
            Command.create({
                'partner_id': collaborator.id,
            }) for collaborator in new_collaborators],
        })

class Task(models.Model):
    _name = "project.task"
    _description = "Task"
    _date_name = "date_assign"
    _inherit = ['portal.mixin', 'mail.thread.cc', 'mail.activity.mixin', 'rating.mixin']
    _mail_post_access = 'read'
    _order = "priority desc, sequence, id desc"
    _check_company_auto = True

    @api.model
    def _get_default_partner_id(self, project=None, parent=None):
        if parent and parent.partner_id:
            return parent.partner_id.id
        if project and project.partner_id:
            return project.partner_id.id
        return False

    def _get_default_stage_id(self):
        """ Gives default stage_id """
        project_id = self.env.context.get('default_project_id')
        if not project_id:
            return False
        return self.stage_find(project_id, [('fold', '=', False), ('is_closed', '=', False)])

    @api.model
    def _default_company_id(self):
        if self._context.get('default_project_id'):
            return self.env['project.project'].browse(self._context['default_project_id']).company_id
        return self.env.company

    @api.model
    def _read_group_stage_ids(self, stages, domain, order):
        search_domain = [('id', 'in', stages.ids)]
        if 'default_project_id' in self.env.context:
            search_domain = ['|', ('project_ids', '=', self.env.context['default_project_id'])] + search_domain

        stage_ids = stages._search(search_domain, order=order, access_rights_uid=SUPERUSER_ID)
        return stages.browse(stage_ids)

    @api.model
    def _read_group_personal_stage_type_ids(self, stages, domain, order):
        return stages.search(['|', ('id', 'in', stages.ids), ('user_id', '=', self.env.user.id)])

    active = fields.Boolean(default=True)
    name = fields.Char(string='Title', tracking=True, required=True, index=True)
    description = fields.Html(string='Description')
    priority = fields.Selection([
        ('0', 'Normal'),
        ('1', 'Important'),
    ], default='0', index=True, string="Starred", tracking=True)
    sequence = fields.Integer(string='Sequence', index=True, default=10,
        help="Gives the sequence order when displaying a list of tasks.")
    stage_id = fields.Many2one('project.task.type', string='Stage', compute='_compute_stage_id',
        store=True, readonly=False, ondelete='restrict', tracking=True, index=True,
        default=_get_default_stage_id, group_expand='_read_group_stage_ids',
        domain="[('project_ids', '=', project_id)]", copy=False, task_dependency_tracking=True)
    tag_ids = fields.Many2many('project.tags', string='Tags')
    kanban_state = fields.Selection([
        ('normal', 'In Progress'),
        ('done', 'Ready'),
        ('blocked', 'Blocked')], string='Status',
        copy=False, default='normal', required=True)
    kanban_state_label = fields.Char(compute='_compute_kanban_state_label', string='Kanban State Label', tracking=True, task_dependency_tracking=True)
    create_date = fields.Datetime("Created On", readonly=True, index=True)
    write_date = fields.Datetime("Last Updated On", readonly=True, index=True)
    date_end = fields.Datetime(string='Ending Date', index=True, copy=False)
    date_assign = fields.Datetime(string='Assigning Date', index=True, copy=False, readonly=True)
    date_deadline = fields.Date(string='Deadline', index=True, copy=False, tracking=True, task_dependency_tracking=True)
    date_last_stage_update = fields.Datetime(string='Last Stage Update',
        index=True,
        copy=False,
        readonly=True)
    project_id = fields.Many2one('project.project', string='Project',
        compute='_compute_project_id', recursive=True, store=True, readonly=False,
        index=True, tracking=True, check_company=True, change_default=True)
    # Defines in which project the task will be displayed / taken into account in statistics.
    # Example: 1 task A with 1 subtask B in project P
    # A -> project_id=P, display_project_id=P
    # B -> project_id=P (to inherit from ACL/security rules), display_project_id=False
    display_project_id = fields.Many2one('project.project', index=True)
    planned_hours = fields.Float("Initially Planned Hours", help='Time planned to achieve this task (including its sub-tasks).', tracking=True)
    subtask_planned_hours = fields.Float("Sub-tasks Planned Hours", compute='_compute_subtask_planned_hours',
        help="Sum of the time planned of all the sub-tasks linked to this task. Usually less than or equal to the initially planned time of this task.")
    # Tracking of this field is done in the write function
    user_ids = fields.Many2many('res.users', relation='project_task_user_rel', column1='task_id', column2='user_id',
        string='Assignees', default=lambda self: not self.env.user.share and self.env.user, context={'active_test': False}, tracking=True)
    # User names displayed in project sharing views
    portal_user_names = fields.Char(compute='_compute_portal_user_names', compute_sudo=True, search='_search_portal_user_names')
    # Second Many2many containing the actual personal stage for the current user
    # See project_task_stage_personal.py for the model defininition
    personal_stage_type_ids = fields.Many2many('project.task.type', 'project_task_user_rel', column1='task_id', column2='stage_id',
        ondelete='restrict', group_expand='_read_group_personal_stage_type_ids', copy=False,
        domain="[('user_id', '=', user.id)]", depends=['user_ids'], string='Personal Stage')
    # Personal Stage computed from the user
    personal_stage_id = fields.Many2one('project.task.stage.personal', string='Personal Stage State', compute_sudo=False,
        compute='_compute_personal_stage_id', help="The current user's personal stage.")
    # This field is actually a related field on personal_stage_id.stage_id
    # However due to the fact that personal_stage_id is computed, the orm throws out errors
    # saying the field cannot be searched.
    personal_stage_type_id = fields.Many2one('project.task.type', string='Personal User Stage',
        compute='_compute_personal_stage_type_id', inverse='_inverse_personal_stage_type_id', store=False,
        search='_search_personal_stage_type_id',
        help="The current user's personal task stage.")
    partner_id = fields.Many2one('res.partner',
        string='Customer',
        compute='_compute_partner_id', recursive=True, store=True, readonly=False, tracking=True,
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]")
    partner_is_company = fields.Boolean(related='partner_id.is_company', readonly=True)
    commercial_partner_id = fields.Many2one(related='partner_id.commercial_partner_id')
    partner_email = fields.Char(
        compute='_compute_partner_email', inverse='_inverse_partner_email',
        string='Email', readonly=False, store=True, copy=False)
    partner_phone = fields.Char(
        compute='_compute_partner_phone', inverse='_inverse_partner_phone',
        string="Phone", readonly=False, store=True, copy=False)
    partner_city = fields.Char(related='partner_id.city', readonly=False)
    manager_id = fields.Many2one('res.users', string='Project Manager', related='project_id.user_id', readonly=True)
    company_id = fields.Many2one(
        'res.company', string='Company', compute='_compute_company_id', store=True, readonly=False,
        required=True, copy=True, default=_default_company_id)
    color = fields.Integer(string='Color Index')
    attachment_ids = fields.One2many('ir.attachment', compute='_compute_attachment_ids', string="Main Attachments",
        help="Attachments that don't come from a message.")
    # In the domain of displayed_image_id, we couln't use attachment_ids because a one2many is represented as a list of commands so we used res_model & res_id
    displayed_image_id = fields.Many2one('ir.attachment', domain="[('res_model', '=', 'project.task'), ('res_id', '=', id), ('mimetype', 'ilike', 'image')]", string='Cover Image')
    legend_blocked = fields.Char(related='stage_id.legend_blocked', string='Kanban Blocked Explanation', readonly=True, related_sudo=False)
    legend_done = fields.Char(related='stage_id.legend_done', string='Kanban Valid Explanation', readonly=True, related_sudo=False)
    legend_normal = fields.Char(related='stage_id.legend_normal', string='Kanban Ongoing Explanation', readonly=True, related_sudo=False)
    is_closed = fields.Boolean(related="stage_id.is_closed", string="Closing Stage", readonly=True, related_sudo=False)
    parent_id = fields.Many2one('project.task', string='Parent Task', index=True)
    child_ids = fields.One2many('project.task', 'parent_id', string="Sub-tasks")
    child_text = fields.Char(compute="_compute_child_text")
    allow_subtasks = fields.Boolean(string="Allow Sub-tasks", related="project_id.allow_subtasks", readonly=True)
    subtask_count = fields.Integer("Sub-task Count", compute='_compute_subtask_count')
    email_from = fields.Char(string='Email From', help="These people will receive email.", index=True,
        compute='_compute_email_from', recursive=True, store=True, readonly=False, copy=False)
    project_privacy_visibility = fields.Selection(related='project_id.privacy_visibility', string="Project Visibility")
    # Computed field about working time elapsed between record creation and assignation/closing.
    working_hours_open = fields.Float(compute='_compute_elapsed', string='Working Hours to Assign', digits=(16, 2), store=True, group_operator="avg")
    working_hours_close = fields.Float(compute='_compute_elapsed', string='Working Hours to Close', digits=(16, 2), store=True, group_operator="avg")
    working_days_open = fields.Float(compute='_compute_elapsed', string='Working Days to Assign', store=True, group_operator="avg")
    working_days_close = fields.Float(compute='_compute_elapsed', string='Working Days to Close', store=True, group_operator="avg")
    # customer portal: include comment and incoming emails in communication history
    website_message_ids = fields.One2many(domain=lambda self: [('model', '=', self._name), ('message_type', 'in', ['email', 'comment'])])
    is_private = fields.Boolean(compute='_compute_is_private')

    # Task Dependencies fields
    allow_task_dependencies = fields.Boolean(related='project_id.allow_task_dependencies')
    # Tracking of this field is done in the write function
    depend_on_ids = fields.Many2many('project.task', relation="task_dependencies_rel", column1="task_id",
                                     column2="depends_on_id", string="Blocked By", tracking=True, copy=False,
                                     domain="[('allow_task_dependencies', '=', True), ('id', '!=', id)]")
    dependent_ids = fields.Many2many('project.task', relation="task_dependencies_rel", column1="depends_on_id",
                                     column2="task_id", string="Block", copy=False,
                                     domain="[('allow_task_dependencies', '=', True), ('id', '!=', id)]")
    dependent_tasks_count = fields.Integer(string="Dependent Tasks", compute='_compute_dependent_tasks_count')

    # recurrence fields
    allow_recurring_tasks = fields.Boolean(related='project_id.allow_recurring_tasks')
    recurring_task = fields.Boolean(string="Recurrent")
    recurring_count = fields.Integer(string="Tasks in Recurrence", compute='_compute_recurring_count')
    recurrence_id = fields.Many2one('project.task.recurrence', copy=False)
    recurrence_update = fields.Selection([
        ('this', 'This task'),
        ('subsequent', 'This and following tasks'),
        ('all', 'All tasks'),
    ], default='this', store=False)
    recurrence_message = fields.Char(string='Next Recurrencies', compute='_compute_recurrence_message')

    repeat_interval = fields.Integer(string='Repeat Every', default=1, compute='_compute_repeat', readonly=False)
    repeat_unit = fields.Selection([
        ('day', 'Days'),
        ('week', 'Weeks'),
        ('month', 'Months'),
        ('year', 'Years'),
    ], default='week', compute='_compute_repeat', readonly=False)
    repeat_type = fields.Selection([
        ('forever', 'Forever'),
        ('until', 'End Date'),
        ('after', 'Number of Repetitions'),
    ], default="forever", string="Until", compute='_compute_repeat', readonly=False)
    repeat_until = fields.Date(string="End Date", compute='_compute_repeat', readonly=False)
    repeat_number = fields.Integer(string="Repetitions", default=1, compute='_compute_repeat', readonly=False)

    repeat_on_month = fields.Selection([
        ('date', 'Date of the Month'),
        ('day', 'Day of the Month'),
    ], default='date', compute='_compute_repeat', readonly=False)

    repeat_on_year = fields.Selection([
        ('date', 'Date of the Year'),
        ('day', 'Day of the Year'),
    ], default='date', compute='_compute_repeat', readonly=False)

    mon = fields.Boolean(string="Mon", compute='_compute_repeat', readonly=False)
    tue = fields.Boolean(string="Tue", compute='_compute_repeat', readonly=False)
    wed = fields.Boolean(string="Wed", compute='_compute_repeat', readonly=False)
    thu = fields.Boolean(string="Thu", compute='_compute_repeat', readonly=False)
    fri = fields.Boolean(string="Fri", compute='_compute_repeat', readonly=False)
    sat = fields.Boolean(string="Sat", compute='_compute_repeat', readonly=False)
    sun = fields.Boolean(string="Sun", compute='_compute_repeat', readonly=False)

    repeat_day = fields.Selection([
        (str(i), str(i)) for i in range(1, 32)
    ], compute='_compute_repeat', readonly=False)
    repeat_week = fields.Selection([
        ('first', 'First'),
        ('second', 'Second'),
        ('third', 'Third'),
        ('last', 'Last'),
    ], default='first', compute='_compute_repeat', readonly=False)
    repeat_weekday = fields.Selection([
        ('mon', 'Monday'),
        ('tue', 'Tuesday'),
        ('wed', 'Wednesday'),
        ('thu', 'Thursday'),
        ('fri', 'Friday'),
        ('sat', 'Saturday'),
        ('sun', 'Sunday'),
    ], string='Day Of The Week', compute='_compute_repeat', readonly=False)
    repeat_month = fields.Selection([
        ('january', 'January'),
        ('february', 'February'),
        ('march', 'March'),
        ('april', 'April'),
        ('may', 'May'),
        ('june', 'June'),
        ('july', 'July'),
        ('august', 'August'),
        ('september', 'September'),
        ('october', 'October'),
        ('november', 'November'),
        ('december', 'December'),
    ], compute='_compute_repeat', readonly=False)

    repeat_show_dow = fields.Boolean(compute='_compute_repeat_visibility')
    repeat_show_day = fields.Boolean(compute='_compute_repeat_visibility')
    repeat_show_week = fields.Boolean(compute='_compute_repeat_visibility')
    repeat_show_month = fields.Boolean(compute='_compute_repeat_visibility')

    # Account analytic
    analytic_account_id = fields.Many2one('account.analytic.account', ondelete='set null',
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]", check_company=True,
        help="Analytic account to which this task is linked for financial management. "
             "Use an analytic account to record cost and revenue on your task. "
             "If empty, the analytic account of the project will be used.")
    project_analytic_account_id = fields.Many2one('account.analytic.account', string='Project Analytic Account', related='project_id.analytic_account_id')
    analytic_tag_ids = fields.Many2many('account.analytic.tag',
        domain="['|', ('company_id', '=', False), ('company_id', '=', company_id)]", check_company=True)

    @property
    def SELF_READABLE_FIELDS(self):
        return PROJECT_TASK_READABLE_FIELDS | self.SELF_WRITABLE_FIELDS

    @property
    def SELF_WRITABLE_FIELDS(self):
        return PROJECT_TASK_WRITABLE_FIELDS

    @api.depends('project_id', 'parent_id')
    def _compute_is_private(self):
        # Modify accordingly, this field is used to display the lock on the task's kanban card
        for task in self:
            task.is_private = not task.project_id and not task.parent_id

    @api.depends_context('uid')
    @api.depends('user_ids')
    def _compute_personal_stage_id(self):
        # An user may only access his own 'personal stage' and there can only be one pair (user, task_id)
        personal_stages = self.env['project.task.stage.personal'].search([('user_id', '=', self.env.uid), ('task_id', 'in', self.ids)])
        self.personal_stage_id = False
        for personal_stage in personal_stages:
            personal_stage.task_id.personal_stage_id = personal_stage

    @api.depends('personal_stage_id')
    def _compute_personal_stage_type_id(self):
        for task in self:
            task.personal_stage_type_id = task.personal_stage_id.stage_id

    def _inverse_personal_stage_type_id(self):
        for task in self:
            task.personal_stage_id.stage_id = task.personal_stage_type_id

    @api.model
    def _search_personal_stage_type_id(self, operator, value):
        return [('personal_stage_type_ids', operator, value)]

    @api.model
    def _get_default_personal_stage_create_vals(self, user_id):
        return [
            {'sequence': 1, 'name': _('Inbox'), 'user_id': user_id, 'fold': False},
            {'sequence': 2, 'name': _('Today'), 'user_id': user_id, 'fold': False},
            {'sequence': 3, 'name': _('This Week'), 'user_id': user_id, 'fold': False},
            {'sequence': 4, 'name': _('This Month'), 'user_id': user_id, 'fold': False},
            {'sequence': 5, 'name': _('Later'), 'user_id': user_id, 'fold': False},
            {'sequence': 6, 'name': _('Done'), 'user_id': user_id, 'fold': True},
            {'sequence': 7, 'name': _('Canceled'), 'user_id': user_id, 'fold': True},
        ]

    def _populate_missing_personal_stages(self):
        # Assign the default personal stage for those that are missing
        personal_stages_without_stage = self.env['project.task.stage.personal'].sudo().search([('task_id', 'in', self.ids), ('stage_id', '=', False)])
        if personal_stages_without_stage:
            user_ids = personal_stages_without_stage.user_id
            personal_stage_by_user = defaultdict(lambda: self.env['project.task.stage.personal'])
            for personal_stage in personal_stages_without_stage:
                personal_stage_by_user[personal_stage.user_id] |= personal_stage
            for user_id in user_ids:
                stage = self.env['project.task.type'].sudo().search([('user_id', '=', user_id.id)], limit=1)
                # In the case no stages have been found, we create the default stages for the user
                if not stage:
                    stages = self.env['project.task.type'].sudo().with_context(lang=user_id.partner_id.lang, default_project_id=False).create(
                        self.with_context(lang=user_id.partner_id.lang)._get_default_personal_stage_create_vals(user_id.id)
                    )
                    stage = stages[0]
                personal_stage_by_user[user_id].sudo().write({'stage_id': stage.id})

    @api.constrains('depend_on_ids')
    def _check_no_cyclic_dependencies(self):
        if not self._check_m2m_recursion('depend_on_ids'):
            raise ValidationError(_("You cannot create cyclic dependency."))

    @api.model
    def _get_recurrence_fields(self):
        return ['repeat_interval', 'repeat_unit', 'repeat_type', 'repeat_until', 'repeat_number',
                'repeat_on_month', 'repeat_on_year', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat',
                'sun', 'repeat_day', 'repeat_week', 'repeat_month', 'repeat_weekday']

    @api.depends('recurring_task', 'repeat_unit', 'repeat_on_month', 'repeat_on_year')
    def _compute_repeat_visibility(self):
        for task in self:
            task.repeat_show_day = task.recurring_task and (task.repeat_unit == 'month' and task.repeat_on_month == 'date') or (task.repeat_unit == 'year' and task.repeat_on_year == 'date')
            task.repeat_show_week = task.recurring_task and (task.repeat_unit == 'month' and task.repeat_on_month == 'day') or (task.repeat_unit == 'year' and task.repeat_on_year == 'day')
            task.repeat_show_dow = task.recurring_task and task.repeat_unit == 'week'
            task.repeat_show_month = task.recurring_task and task.repeat_unit == 'year'

    @api.depends('recurring_task')
    def _compute_repeat(self):
        rec_fields = self._get_recurrence_fields()
        defaults = self.default_get(rec_fields)
        for task in self:
            for f in rec_fields:
                if task.recurrence_id:
                    task[f] = task.recurrence_id[f]
                else:
                    if task.recurring_task:
                        task[f] = defaults.get(f)
                    else:
                        task[f] = False

    def _get_weekdays(self, n=1):
        self.ensure_one()
        if self.repeat_unit == 'week':
            return [fn(n) for day, fn in DAYS.items() if self[day]]
        return [DAYS.get(self.repeat_weekday)(n)]

    def _get_recurrence_start_date(self):
        return fields.Date.today()

    @api.depends(
        'recurring_task', 'repeat_interval', 'repeat_unit', 'repeat_type', 'repeat_until',
        'repeat_number', 'repeat_on_month', 'repeat_on_year', 'mon', 'tue', 'wed', 'thu', 'fri',
        'sat', 'sun', 'repeat_day', 'repeat_week', 'repeat_month', 'repeat_weekday')
    def _compute_recurrence_message(self):
        self.recurrence_message = False
        for task in self.filtered(lambda t: t.recurring_task and t._is_recurrence_valid()):
            date = task._get_recurrence_start_date()
            recurrence_left = task.recurrence_id.recurrence_left if task.recurrence_id  else task.repeat_number
            number_occurrences = min(5, recurrence_left if task.repeat_type == 'after' else 5)
            delta = task.repeat_interval if task.repeat_unit == 'day' else 1
            recurring_dates = self.env['project.task.recurrence']._get_next_recurring_dates(
                date + timedelta(days=delta),
                task.repeat_interval,
                task.repeat_unit,
                task.repeat_type,
                task.repeat_until,
                task.repeat_on_month,
                task.repeat_on_year,
                task._get_weekdays(WEEKS.get(task.repeat_week)),
                task.repeat_day,
                task.repeat_week,
                task.repeat_month,
                count=number_occurrences)
            date_format = self.env['res.lang']._lang_get(self.env.user.lang).date_format
            if recurrence_left == 0:
                recurrence_title = _('There are no more occurrences.')
            else:
                recurrence_title = _('Next Occurrences:')
            task.recurrence_message = '<p><span class="fa fa-check-circle"></span> %s</p><ul>' % recurrence_title
            task.recurrence_message += ''.join(['<li>%s</li>' % date.strftime(date_format) for date in recurring_dates[:5]])
            if task.repeat_type == 'after' and recurrence_left > 5 or task.repeat_type == 'forever' or len(recurring_dates) > 5:
                task.recurrence_message += '<li>...</li>'
            task.recurrence_message += '</ul>'
            if task.repeat_type == 'until':
                task.recurrence_message += _('<p><em>Number of tasks: %(tasks_count)s</em></p>') % {'tasks_count': len(recurring_dates)}

    def _is_recurrence_valid(self):
        self.ensure_one()
        return self.repeat_interval > 0 and\
                (not self.repeat_show_dow or self._get_weekdays()) and\
                (self.repeat_type != 'after' or self.repeat_number) and\
                (self.repeat_type != 'until' or self.repeat_until and self.repeat_until > fields.Date.today())

    @api.depends('recurrence_id')
    def _compute_recurring_count(self):
        self.recurring_count = 0
        recurring_tasks = self.filtered(lambda l: l.recurrence_id)
        count = self.env['project.task'].read_group([('recurrence_id', 'in', recurring_tasks.recurrence_id.ids)], ['id'], 'recurrence_id')
        tasks_count = {c.get('recurrence_id')[0]: c.get('recurrence_id_count') for c in count}
        for task in recurring_tasks:
            task.recurring_count = tasks_count.get(task.recurrence_id.id, 0)

    @api.depends('dependent_ids')
    def _compute_dependent_tasks_count(self):
        tasks_with_dependency = self.filtered('allow_task_dependencies')
        (self - tasks_with_dependency).dependent_tasks_count = 0
        if tasks_with_dependency:
            group_dependent = self.env['project.task'].read_group([
                ('depend_on_ids', 'in', tasks_with_dependency.ids),
            ], ['depend_on_ids'], ['depend_on_ids'])
            dependent_tasks_count_dict = {
                group['depend_on_ids'][0]: group['depend_on_ids_count']
                for group in group_dependent
            }
            for task in tasks_with_dependency:
                task.dependent_tasks_count = dependent_tasks_count_dict.get(task.id, 0)

    @api.depends('partner_id.email')
    def _compute_partner_email(self):
        for task in self:
            if task.partner_id and task.partner_id.email != task.partner_email:
                task.partner_email = task.partner_id.email

    def _inverse_partner_email(self):
        for task in self:
            if task.partner_id and task.partner_email != task.partner_id.email:
                task.partner_id.email = task.partner_email

    @api.depends('partner_id.phone')
    def _compute_partner_phone(self):
        for task in self:
            if task.partner_id and task.partner_phone != task.partner_id.phone:
                task.partner_phone = task.partner_id.phone

    def _inverse_partner_phone(self):
        for task in self:
            if task.partner_id and task.partner_phone != task.partner_id.phone:
                task.partner_id.phone = task.partner_phone

    @api.constrains('parent_id')
    def _check_parent_id(self):
        if not self._check_recursion():
            raise ValidationError(_('Error! You cannot create a recursive hierarchy of tasks.'))

    def _compute_attachment_ids(self):
        for task in self:
            attachment_ids = self.env['ir.attachment'].search([('res_id', '=', task.id), ('res_model', '=', 'project.task')]).ids
            message_attachment_ids = task.mapped('message_ids.attachment_ids').ids  # from mail_thread
            task.attachment_ids = [(6, 0, list(set(attachment_ids) - set(message_attachment_ids)))]

    @api.depends('create_date', 'date_end', 'date_assign')
    def _compute_elapsed(self):
        task_linked_to_calendar = self.filtered(
            lambda task: task.project_id.resource_calendar_id and task.create_date
        )
        for task in task_linked_to_calendar:
            dt_create_date = fields.Datetime.from_string(task.create_date)

            if task.date_assign:
                dt_date_assign = fields.Datetime.from_string(task.date_assign)
                duration_data = task.project_id.resource_calendar_id.get_work_duration_data(dt_create_date, dt_date_assign, compute_leaves=True)
                task.working_hours_open = duration_data['hours']
                task.working_days_open = duration_data['days']
            else:
                task.working_hours_open = 0.0
                task.working_days_open = 0.0

            if task.date_end:
                dt_date_end = fields.Datetime.from_string(task.date_end)
                duration_data = task.project_id.resource_calendar_id.get_work_duration_data(dt_create_date, dt_date_end, compute_leaves=True)
                task.working_hours_close = duration_data['hours']
                task.working_days_close = duration_data['days']
            else:
                task.working_hours_close = 0.0
                task.working_days_close = 0.0

        (self - task_linked_to_calendar).update(dict.fromkeys(
            ['working_hours_open', 'working_hours_close', 'working_days_open', 'working_days_close'], 0.0))

    @api.depends('stage_id', 'kanban_state')
    def _compute_kanban_state_label(self):
        for task in self:
            if task.kanban_state == 'normal':
                task.kanban_state_label = task.legend_normal
            elif task.kanban_state == 'blocked':
                task.kanban_state_label = task.legend_blocked
            else:
                task.kanban_state_label = task.legend_done

    def _compute_access_url(self):
        super(Task, self)._compute_access_url()
        for task in self:
            task.access_url = '/my/task/%s' % task.id

    def _compute_access_warning(self):
        super(Task, self)._compute_access_warning()
        for task in self.filtered(lambda x: x.project_id.privacy_visibility != 'portal'):
            task.access_warning = _(
                "The task cannot be shared with the recipient(s) because the privacy of the project is too restricted. Set the privacy of the project to 'Visible by following customers' in order to make it accessible by the recipient(s).")

    @api.depends('child_ids.planned_hours')
    def _compute_subtask_planned_hours(self):
        for task in self:
            task.subtask_planned_hours = sum(child_task.planned_hours + child_task.subtask_planned_hours for child_task in task.child_ids)

    @api.depends('child_ids')
    def _compute_child_text(self):
        for task in self:
            if not task.subtask_count:
                task.child_text = False
            elif task.subtask_count == 1:
                task.child_text = _("(+ 1 task)")
            else:
                task.child_text = _("(+ %(child_count)s tasks)", child_count=task.subtask_count)

    @api.depends('child_ids')
    def _compute_subtask_count(self):
        for task in self:
            task.subtask_count = len(task._get_all_subtasks())

    @api.onchange('company_id')
    def _onchange_task_company(self):
        if self.project_id.company_id != self.company_id:
            self.project_id = False

    @api.depends('project_id.company_id')
    def _compute_company_id(self):
        for task in self.filtered(lambda task: task.project_id):
            task.company_id = task.project_id.company_id

    @api.depends('project_id')
    def _compute_stage_id(self):
        for task in self:
            if task.project_id:
                if task.project_id not in task.stage_id.project_ids:
                    task.stage_id = task.stage_find(task.project_id.id, [
                        ('fold', '=', False), ('is_closed', '=', False)])
            else:
                task.stage_id = False

    @api.depends('user_ids')
    def _compute_portal_user_names(self):
        """ This compute method allows to see all the names of assigned users to each task contained in `self`.

            When we are in the project sharing feature, the `user_ids` contains only the users if we are a portal user.
            That is, only the users in the same company of the current user.
            So this compute method is a related of `user_ids.name` but with more records that the portal user
            can normally see.
            (In other words, this compute is only used in project sharing views to see all assignees for each task)
        """
        if self.ids:
            # fetch 'user_ids' in superuser mode (and override value in cache
            # browse is useful to avoid miscache because of the newIds contained in self
            self.browse(self.ids)._read(['user_ids'])
        for task in self.with_context(prefetch_fields=False):
            task.portal_user_names = ', '.join(task.user_ids.mapped('name'))

    def _search_portal_user_names(self, operator, value):
        if operator != 'ilike' and not isinstance(value, str):
            raise ValidationError('Not Implemented.')

        query = """
            SELECT task_user.task_id
              FROM project_task_user_rel task_user
        INNER JOIN res_users users ON task_user.user_id = users.id
        INNER JOIN res_partner partners ON partners.id = users.partner_id
             WHERE partners.name ILIKE %s
        """
        return [('id', 'inselect', (query, [f'%{value}%']))]

    @api.constrains('recurring_task')
    def _check_recurring_task(self):
        # Deprecated method
        # TODO : Remove me in master
        return

    @api.returns('self', lambda value: value.id)
    def copy(self, default=None):
        if default is None:
            default = {}
        if not default.get('name'):
            default['name'] = _("%s (copy)", self.name)
        if self.recurrence_id:
            default['recurrence_id'] = self.recurrence_id.copy().id
        return super(Task, self).copy(default)

    @api.model
    def get_empty_list_help(self, help):
        tname = _("task")
        project_id = self.env.context.get('default_project_id', False)
        if project_id:
            name = self.env['project.project'].browse(project_id).label_tasks
            if name: tname = name.lower()

        self = self.with_context(
            empty_list_help_id=self.env.context.get('default_project_id'),
            empty_list_help_model='project.project',
            empty_list_help_document_name=tname,
        )
        return super(Task, self).get_empty_list_help(help)

    def _valid_field_parameter(self, field, name):
        # If the field has `task_dependency_tracking` on we track the changes made in the dependent task on the parent task
        return name == 'task_dependency_tracking' or super()._valid_field_parameter(field, name)

    @tools.ormcache('self.env.uid', 'self.env.su')
    def _get_depends_tracked_fields(self):
        """ Returns the set of tracked field names for the current model.
        Those fields are the ones tracked in the parent task when using task dependencies.

        See :meth:`mail.models.MailThread._get_tracked_fields`"""
        fields = {name for name, field in self._fields.items() if getattr(field, 'task_dependency_tracking', None)}
        return fields and set(self.fields_get(fields))

    # ----------------------------------------
    # Case management
    # ----------------------------------------

    def stage_find(self, section_id, domain=[], order='sequence, id'):
        """ Override of the base.stage method
            Parameter of the stage search taken from the lead:
            - section_id: if set, stages must belong to this section or
              be a default stage; if not set, stages must be default
              stages
        """
        # collect all section_ids
        section_ids = []
        if section_id:
            section_ids.append(section_id)
        section_ids.extend(self.mapped('project_id').ids)
        search_domain = []
        if section_ids:
            search_domain = [('|')] * (len(section_ids) - 1)
            for section_id in section_ids:
                search_domain.append(('project_ids', '=', section_id))
        search_domain += list(domain)
        # perform search, return the first found
        return self.env['project.task.type'].search(search_domain, order=order, limit=1).id

    # ------------------------------------------------
    # CRUD overrides
    # ------------------------------------------------
    @api.model
    def fields_get(self, allfields=None, attributes=None):
        fields = super().fields_get(allfields=allfields, attributes=attributes)
        if not self.env.user.has_group('base.group_portal'):
            return fields
        readable_fields = self.SELF_READABLE_FIELDS
        public_fields = {field_name: description for field_name, description in fields.items() if field_name in readable_fields}

        writable_fields = self.SELF_WRITABLE_FIELDS
        for field_name, description in public_fields.items():
            if field_name not in writable_fields and not description.get('readonly', False):
                # If the field is not in Writable fields and it is not readonly then we force the readonly to True
                description['readonly'] = True

        return public_fields

    @api.model
    def default_get(self, default_fields):
        vals = super(Task, self).default_get(default_fields)

        days = list(DAYS.keys())
        week_start = fields.Datetime.today().weekday()

        if all(d in default_fields for d in days):
            vals[days[week_start]] = True
        if 'repeat_day' in default_fields:
            vals['repeat_day'] = str(fields.Datetime.today().day)
        if 'repeat_month' in default_fields:
            vals['repeat_month'] = self._fields.get('repeat_month').selection[fields.Datetime.today().month - 1][0]
        if 'repeat_until' in default_fields:
            vals['repeat_until'] = fields.Date.today() + timedelta(days=7)
        if 'repeat_weekday' in default_fields:
            vals['repeat_weekday'] = self._fields.get('repeat_weekday').selection[week_start][0]

        if 'partner_id' in vals and not vals['partner_id']:
            # if the default_partner_id=False or no default_partner_id then we search the partner based on the project and parent
            project_id = vals.get('project_id')
            parent_id = vals.get('parent_id', self.env.context.get('default_parent_id'))
            if project_id or parent_id:
                partner_id = self._get_default_partner_id(
                    project_id and self.env['project.project'].browse(project_id),
                    parent_id and self.env['project.task'].browse(parent_id)
                )
                if partner_id:
                    vals['partner_id'] = partner_id

        return vals

    def _ensure_fields_are_accessible(self, fields, operation='read', check_group_user=True):
        """" ensure all fields are accessible by the current user

            This method checks if the portal user can access to all fields given in parameter.
            By default, it checks if the current user is a portal user and then checks if all fields are accessible for this user.

            :param fields: list of fields to check if the current user can access.
            :param operation: contains either 'read' to check readable fields or 'write' to check writable fields.
            :param check_group_user: contains boolean value.
                - True, if the method has to check if the current user is a portal one.
                - False if we are sure the user is a portal user,
        """
        assert operation in ('read', 'write'), 'Invalid operation'
        if fields and (not check_group_user or self.env.user.has_group('base.group_portal')) and not self.env.su:
            unauthorized_fields = set(fields) - (self.SELF_READABLE_FIELDS if operation == 'read' else self.SELF_WRITABLE_FIELDS)
            if unauthorized_fields:
                if operation == 'read':
                    error_message = _('You cannot read %s fields in task.', ', '.join(unauthorized_fields))
                else:
                    error_message = _('You cannot write on %s fields in task.', ', '.join(unauthorized_fields))
                raise AccessError(error_message)

    def read(self, fields=None, load='_classic_read'):
        self._ensure_fields_are_accessible(fields)
        return super(Task, self).read(fields=fields, load=load)

    @api.model
    def read_group(self, domain, fields, groupby, offset=0, limit=None, orderby=False, lazy=True):
        fields_list = ([f.split(':')[0] for f in fields] or [])
        if groupby:
            fields_groupby = [groupby] if isinstance(groupby, str) else groupby
            # only take field name when having ':' e.g 'date_deadline:week' => 'date_deadline'
            fields_list += [f.split(':')[0] for f in fields_groupby]
        if domain:
            fields_list += [term[0].split('.')[0] for term in domain if isinstance(term, (tuple, list)) and term not in [TRUE_LEAF, FALSE_LEAF]]
        self._ensure_fields_are_accessible(fields_list)
        return super(Task, self).read_group(domain, fields, groupby, offset=offset, limit=limit, orderby=orderby, lazy=lazy)

    @api.model
    def _search(self, args, offset=0, limit=None, order=None, count=False, access_rights_uid=None):
        fields_list = {term[0] for term in args if isinstance(term, (tuple, list)) and term not in [TRUE_LEAF, FALSE_LEAF]}
        self._ensure_fields_are_accessible(fields_list)
        return super(Task, self)._search(args, offset=offset, limit=limit, order=order, count=count, access_rights_uid=access_rights_uid)

    def mapped(self, func):
        # Note: This will protect the filtered method too
        if func and isinstance(func, str):
            fields_list = func.split('.')
            self._ensure_fields_are_accessible(fields_list)
        return super(Task, self).mapped(func)

    def filtered_domain(self, domain):
        fields_list = [term[0] for term in domain if isinstance(term, (tuple, list)) and term not in [TRUE_LEAF, FALSE_LEAF]]
        self._ensure_fields_are_accessible(fields_list)
        return super(Task, self).filtered_domain(domain)

    def copy_data(self, default=None):
        defaults = super().copy_data(default=default)
        if self.env.user.has_group('project.group_project_user'):
            return defaults
        return [{k: v for k, v in default.items() if k in self.SELF_READABLE_FIELDS} for default in defaults]

    @api.model
    def _ensure_portal_user_can_write(self, fields):
        for field in fields:
            if field not in self.SELF_WRITABLE_FIELDS:
                raise AccessError(_('You have not write access of %s field.') % field)

    def _load_records_create(self, vals_list):
        projects_with_recurrence = self.env['project.project'].search([('allow_recurring_tasks', '=', True)])
        for vals in vals_list:
            if vals.get('recurring_task'):
                if vals.get('project_id') in projects_with_recurrence.ids and not vals.get('recurrence_id'):
                    default_val = self.default_get(self._get_recurrence_fields())
                    vals.update(**default_val)
                else:
                    for field_name in self._get_recurrence_fields() + ['recurring_task']:
                        vals.pop(field_name, None)
        tasks = super()._load_records_create(vals_list)
        stage_ids_per_project = defaultdict(list)
        for task in tasks:
            if task.stage_id and task.stage_id not in task.project_id.type_ids and task.stage_id.id not in stage_ids_per_project[task.project_id]:
                stage_ids_per_project[task.project_id].append(task.stage_id.id)

        for project, stage_ids in stage_ids_per_project.items():
            project.write({'type_ids': [Command.link(stage_id) for stage_id in stage_ids]})

        return tasks

    @api.model_create_multi
    def create(self, vals_list):
        is_portal_user = self.env.user.has_group('base.group_portal')
        if is_portal_user:
            self.check_access_rights('create')
        default_stage = dict()
        for vals in vals_list:
            if is_portal_user:
                self._ensure_fields_are_accessible(vals.keys(), operation='write', check_group_user=False)

            project_id = vals.get('project_id') or self.env.context.get('default_project_id')
            if not vals.get('parent_id'):
                # 1) We must initialize display_project_id to follow project_id if there is no parent_id
                vals['display_project_id'] = project_id
            if project_id and not "company_id" in vals:
                vals["company_id"] = self.env["project.project"].browse(
                    project_id
                ).company_id.id or self.env.company.id
            if project_id and "stage_id" not in vals:
                # 1) Allows keeping the batch creation of tasks
                # 2) Ensure the defaults are correct (and computed once by project),
                # by using default get (instead of _get_default_stage_id or _stage_find),
                if project_id not in default_stage:
                    default_stage[project_id] = self.with_context(
                        default_project_id=project_id
                    ).default_get(['stage_id']).get('stage_id')
                vals["stage_id"] = default_stage[project_id]
            # user_ids change: update date_assign
            if vals.get('user_ids'):
                vals['date_assign'] = fields.Datetime.now()
            # Stage change: Update date_end if folded stage and date_last_stage_update
            if vals.get('stage_id'):
                vals.update(self.update_date_end(vals['stage_id']))
                vals['date_last_stage_update'] = fields.Datetime.now()
            # recurrence
            rec_fields = vals.keys() & self._get_recurrence_fields()
            if rec_fields and vals.get('recurring_task') is True:
                rec_values = {rec_field: vals[rec_field] for rec_field in rec_fields}
                rec_values['next_recurrence_date'] = fields.Datetime.today()
                recurrence = self.env['project.task.recurrence'].create(rec_values)
                vals['recurrence_id'] = recurrence.id
        # The sudo is required for a portal user as the record creation
        # requires the read access on other models, as mail.template
        # in order to compute the field tracking
        was_in_sudo = self.env.su
        if is_portal_user:
            ctx = {
                key: value for key, value in self.env.context.items()
                if key == 'default_project_id' \
                    or not key.startswith('default_') \
                    or key[8:] in self.SELF_WRITABLE_FIELDS
            }
            self = self.with_context(ctx).sudo()
        tasks = super(Task, self).create(vals_list)
        tasks._populate_missing_personal_stages()
        self._task_message_auto_subscribe_notify({task: task.user_ids - self.env.user for task in tasks})

        # in case we were already in sudo, we don't check the rights.
        if is_portal_user and not was_in_sudo:
            # since we use sudo to create tasks, we need to check
            # if the portal user could really create the tasks based on the ir rule.
            tasks.with_user(self.env.user).check_access_rule('create')
        for task in tasks:
            if task.project_id.privacy_visibility == 'portal':
                task._portal_ensure_token()
        return tasks

    def write(self, vals):
        if len(self) == 1:
            handle_history_divergence(self, 'description', vals)
        portal_can_write = False
        if self.env.user.has_group('base.group_portal') and not self.env.su:
            # Check if all fields in vals are in SELF_WRITABLE_FIELDS
            self._ensure_fields_are_accessible(vals.keys(), operation='write', check_group_user=False)
            self.check_access_rights('write')
            self.check_access_rule('write')
            portal_can_write = True

        now = fields.Datetime.now()
        if 'parent_id' in vals and vals['parent_id'] in self.ids:
            raise UserError(_("Sorry. You can't set a task as its parent task."))
        if 'active' in vals and not vals.get('active') and any(self.mapped('recurrence_id')):
            # TODO: show a dialog to stop the recurrence
            raise UserError(_('You cannot archive recurring tasks. Please disable the recurrence first.'))
        if 'recurrence_id' in vals and vals.get('recurrence_id') and any(not task.active for task in self):
            raise UserError(_('Archived tasks cannot be recurring. Please unarchive the task first.'))
        # stage change: update date_last_stage_update
        if 'stage_id' in vals:
            vals.update(self.update_date_end(vals['stage_id']))
            vals['date_last_stage_update'] = now
            # reset kanban state when changing stage
            if 'kanban_state' not in vals:
                vals['kanban_state'] = 'normal'
        # user_ids change: update date_assign
        if vals.get('user_ids') and 'date_assign' not in vals:
            vals['date_assign'] = now

        # recurrence fields
        rec_fields = vals.keys() & self._get_recurrence_fields()
        if rec_fields:
            rec_values = {rec_field: vals[rec_field] for rec_field in rec_fields}
            for task in self:
                if task.recurrence_id:
                    task.recurrence_id.write(rec_values)
                elif vals.get('recurring_task'):
                    rec_values['next_recurrence_date'] = fields.Datetime.today()
                    recurrence = self.env['project.task.recurrence'].create(rec_values)
                    task.recurrence_id = recurrence.id

        if 'recurring_task' in vals and not vals.get('recurring_task'):
            self.recurrence_id.unlink()

        tasks = self
        recurrence_update = vals.pop('recurrence_update', 'this')
        if recurrence_update != 'this':
            recurrence_domain = []
            if recurrence_update == 'subsequent':
                for task in self:
                    recurrence_domain = OR([recurrence_domain, ['&', ('recurrence_id', '=', task.recurrence_id.id), ('create_date', '>=', task.create_date)]])
            else:
                recurrence_domain = [('recurrence_id', 'in', self.recurrence_id.ids)]
            tasks |= self.env['project.task'].search(recurrence_domain)

        # The sudo is required for a portal user as the record update
        # requires the write access on others models, as rating.rating
        # in order to keep the same name than the task.
        if portal_can_write:
            tasks = tasks.sudo()

        # Track user_ids to send assignment notifications
        old_user_ids = {t: t.user_ids for t in self}

        result = super(Task, tasks).write(vals)

        self._task_message_auto_subscribe_notify({task: task.user_ids - old_user_ids[task] - self.env.user for task in self})

        if 'user_ids' in vals:
            tasks._populate_missing_personal_stages()

        # rating on stage
        if 'stage_id' in vals and vals.get('stage_id'):
            tasks.filtered(lambda x: x.project_id.rating_active and x.project_id.rating_status == 'stage')._send_task_rating_mail(force_send=True)
        for task in self:
            if task.display_project_id != task.project_id and not task.parent_id:
                # We must make the display_project_id follow the project_id if no parent_id set
                task.display_project_id = task.project_id
        return result

    def update_date_end(self, stage_id):
        project_task_type = self.env['project.task.type'].browse(stage_id)
        if project_task_type.fold or project_task_type.is_closed:
            return {'date_end': fields.Datetime.now()}
        return {'date_end': False}

    @api.ondelete(at_uninstall=False)
    def _unlink_except_recurring(self):
        if any(self.mapped('recurrence_id')):
            # TODO: show a dialog to stop the recurrence
            raise UserError(_('You cannot delete recurring tasks. Please disable the recurrence first.'))

    # ---------------------------------------------------
    # Subtasks
    # ---------------------------------------------------

    @api.depends('parent_id', 'project_id', 'display_project_id')
    def _compute_partner_id(self):
        """ Compute the partner_id when the tasks have no partner_id.

            Use the project partner_id if any, or else the parent task partner_id.
        """
        for task in self.filtered(lambda task: not task.partner_id):
            # When the task has a parent task, the display_project_id can be False or the project choose by the user for this task.
            project = task.display_project_id if task.parent_id and task.display_project_id else task.project_id
            task.partner_id = self._get_default_partner_id(project, task.parent_id)

    @api.depends('partner_id.email', 'parent_id.email_from')
    def _compute_email_from(self):
        for task in self:
            task.email_from = task.partner_id.email or ((task.partner_id or task.parent_id) and task.email_from) or task.parent_id.email_from

    @api.depends('parent_id.project_id', 'display_project_id')
    def _compute_project_id(self):
        for task in self:
            if task.parent_id:
                task.project_id = task.display_project_id or task.parent_id.project_id

    # ---------------------------------------------------
    # Mail gateway
    # ---------------------------------------------------

    @api.model
    def _task_message_auto_subscribe_notify(self, users_per_task):
        # Utility method to send assignation notification upon writing/creation.
        template_id = self.env['ir.model.data']._xmlid_to_res_id('project.project_message_user_assigned', raise_if_not_found=False)
        if not template_id:
            return
        view = self.env['ir.ui.view'].browse(template_id)
        task_model_description = self.env['ir.model']._get(self._name).display_name
        for task, users in users_per_task.items():
            if not users:
                continue
            values = {
                'object': task,
                'model_description': task_model_description,
                'access_link': task._notify_get_action_link('view'),
            }
            for user in users:
                values.update(assignee_name=user.sudo().name)
                assignation_msg = view._render(values, engine='ir.qweb', minimal_qcontext=True)
                assignation_msg = self.env['mail.render.mixin']._replace_local_links(assignation_msg)
                task.message_notify(
                    subject=_('You have been assigned to %s', task.display_name),
                    body=assignation_msg,
                    partner_ids=user.partner_id.ids,
                    record_name=task.display_name,
                    email_layout_xmlid='mail.mail_notification_light',
                    model_description=task_model_description,
                )

    def _message_auto_subscribe_followers(self, updated_values, default_subtype_ids):
        if 'user_ids' not in updated_values:
            return []
        # Since the changes to user_ids becoming a m2m, the default implementation of this function
        #  could not work anymore, override the function to keep the functionality.
        new_followers = []
        # Normalize input to tuple of ids
        value = self._fields['user_ids'].convert_to_cache(updated_values.get('user_ids', []), self.env['project.task'], validate=False)
        users = self.env['res.users'].browse(value)
        for user in users:
            try:
                if user.partner_id:
                    # The you have been assigned notification is handled separately
                    new_followers.append((user.partner_id.id, default_subtype_ids, False))
            except:
                pass
        return new_followers

    def _mail_track(self, tracked_fields, initial_values):
        changes, tracking_value_ids  = super()._mail_track(tracked_fields, initial_values)
        # Many2many tracking
        if len(changes) > len(tracking_value_ids):
            for changed_field in changes:
                if tracked_fields[changed_field]['type'] in ['one2many', 'many2many']:
                    field = self.env['ir.model.fields']._get(self._name, changed_field)
                    vals = {
                        'field': field.id,
                        'field_desc': field.field_description,
                        'field_type': field.ttype,
                        'tracking_sequence': field.tracking,
                        'old_value_char': ', '.join(initial_values[changed_field].mapped('name')),
                        'new_value_char': ', '.join(self[changed_field].mapped('name')),
                    }
                    tracking_value_ids.append(Command.create(vals))
        # Track changes on depending tasks
        depends_tracked_fields = self._get_depends_tracked_fields()
        depends_changes = changes & depends_tracked_fields
        if depends_changes and self.allow_task_dependencies and self.user_has_groups('project.group_project_task_dependencies'):
            parent_ids = self.dependent_ids
            if parent_ids:
                fields_to_ids = self.env['ir.model.fields']._get_ids('project.task')
                field_ids = [fields_to_ids.get(name) for name in depends_changes]
                depends_tracking_value_ids = [
                    tracking_values for tracking_values in tracking_value_ids
                    if tracking_values[2]['field'] in field_ids
                ]
                subtype = self.env['ir.model.data']._xmlid_to_res_id('project.mt_task_dependency_change')
                # We want to include the original subtype message coming from the child task
                # for example when the stage changes the message in the chatter starts with 'Stage Changed'
                child_subtype = self._track_subtype(dict((col_name, initial_values[col_name]) for col_name in changes))
                child_subtype_info = child_subtype.description or child_subtype.name if child_subtype else False
                # NOTE: the subtype does not have a description on purpose, otherwise the description would be put
                #  at the end of the message instead of at the top, we use the name here
                body = self.env['ir.qweb']._render('project.task_track_depending_tasks', {
                    'child': self,
                    'child_subtype': child_subtype_info,
                })
                for p in parent_ids:
                    p.message_post(body=body, subtype_id=subtype, tracking_value_ids=depends_tracking_value_ids)
        return changes, tracking_value_ids

    def _track_template(self, changes):
        res = super(Task, self)._track_template(changes)
        test_task = self[0]
        if 'stage_id' in changes and test_task.stage_id.mail_template_id:
            res['stage_id'] = (test_task.stage_id.mail_template_id, {
                'auto_delete_message': True,
                'subtype_id': self.env['ir.model.data']._xmlid_to_res_id('mail.mt_note'),
                'email_layout_xmlid': 'mail.mail_notification_light'
            })
        return res

    def _creation_subtype(self):
        return self.env.ref('project.mt_task_new')

    def _track_subtype(self, init_values):
        self.ensure_one()
        if 'kanban_state_label' in init_values and self.kanban_state == 'blocked':
            return self.env.ref('project.mt_task_blocked')
        elif 'kanban_state_label' in init_values and self.kanban_state == 'done':
            return self.env.ref('project.mt_task_ready')
        elif 'stage_id' in init_values:
            return self.env.ref('project.mt_task_stage')
        return super(Task, self)._track_subtype(init_values)

    def _mail_get_message_subtypes(self):
        res = super()._mail_get_message_subtypes()
        if len(self) == 1:
            dependency_subtype = self.env.ref('project.mt_task_dependency_change')
            if ((self.project_id and not self.project_id.allow_task_dependencies)\
                or (not self.project_id and not self.user_has_groups('project.group_project_task_dependencies')))\
                and dependency_subtype in res:
                res -= dependency_subtype
        return res

    def _notify_get_groups(self, msg_vals=None):
        """ Handle project users and managers recipients that can assign
        tasks and create new one directly from notification emails. Also give
        access button to portal users and portal customers. If they are notified
        they should probably have access to the document. """
        groups = super(Task, self)._notify_get_groups(msg_vals=msg_vals)
        local_msg_vals = dict(msg_vals or {})
        self.ensure_one()

        project_user_group_id = self.env.ref('project.group_project_user').id
        new_group = ('group_project_user', lambda pdata: pdata['type'] == 'user' and project_user_group_id in pdata['groups'], {})
        groups = [new_group] + groups

        if self.project_privacy_visibility == 'portal':
            groups.insert(0, (
                'allowed_portal_users',
                lambda pdata: pdata['type'] == 'portal',
                {}
            ))
        portal_privacy = self.project_id.privacy_visibility == 'portal'
        for group_name, group_method, group_data in groups:
            if group_name in ('customer', 'user') or group_name == 'portal_customer' and not portal_privacy:
                group_data['has_button_access'] = False
            elif group_name == 'portal_customer' and portal_privacy:
                group_data['has_button_access'] = True

        return groups

    def _notify_get_reply_to(self, default=None, records=None, company=None, doc_names=None):
        """ Override to set alias of tasks to their project if any. """
        aliases = self.sudo().mapped('project_id')._notify_get_reply_to(default=default, records=None, company=company, doc_names=None)
        res = {task.id: aliases.get(task.project_id.id) for task in self}
        leftover = self.filtered(lambda rec: not rec.project_id)
        if leftover:
            res.update(super(Task, leftover)._notify_get_reply_to(default=default, records=None, company=company, doc_names=doc_names))
        return res

    def email_split(self, msg):
        email_list = tools.email_split((msg.get('to') or '') + ',' + (msg.get('cc') or ''))
        # check left-part is not already an alias
        aliases = self.mapped('project_id.alias_name')
        return [x for x in email_list if x.split('@')[0] not in aliases]

    @api.model
    def message_new(self, msg, custom_values=None):
        """ Overrides mail_thread message_new that is called by the mailgateway
            through message_process.
            This override updates the document according to the email.
        """
        # remove default author when going through the mail gateway. Indeed we
        # do not want to explicitly set user_id to False; however we do not
        # want the gateway user to be responsible if no other responsible is
        # found.
        create_context = dict(self.env.context or {})
        create_context['default_user_ids'] = False
        if custom_values is None:
            custom_values = {}
        defaults = {
            'name': msg.get('subject') or _("No Subject"),
            'email_from': msg.get('from'),
            'planned_hours': 0.0,
            'partner_id': msg.get('author_id')
        }
        defaults.update(custom_values)

        task = super(Task, self.with_context(create_context)).message_new(msg, custom_values=defaults)
        email_list = task.email_split(msg)
        partner_ids = [p.id for p in self.env['mail.thread']._mail_find_partner_from_emails(email_list, records=task, force_create=False) if p]
        task.message_subscribe(partner_ids)
        return task

    def message_update(self, msg, update_vals=None):
        """ Override to update the task according to the email. """
        email_list = self.email_split(msg)
        partner_ids = [p.id for p in self.env['mail.thread']._mail_find_partner_from_emails(email_list, records=self, force_create=False) if p]
        self.message_subscribe(partner_ids)
        return super(Task, self).message_update(msg, update_vals=update_vals)

    def _message_get_suggested_recipients(self):
        recipients = super(Task, self)._message_get_suggested_recipients()
        for task in self:
            if task.partner_id:
                reason = _('Customer Email') if task.partner_id.email else _('Customer')
                task._message_add_suggested_recipient(recipients, partner=task.partner_id, reason=reason)
            elif task.email_from:
                task._message_add_suggested_recipient(recipients, email=task.email_from, reason=_('Customer Email'))
        return recipients

    def _notify_email_header_dict(self):
        headers = super(Task, self)._notify_email_header_dict()
        if self.project_id:
            current_objects = [h for h in headers.get('X-Odoo-Objects', '').split(',') if h]
            current_objects.insert(0, 'project.project-%s, ' % self.project_id.id)
            headers['X-Odoo-Objects'] = ','.join(current_objects)
        if self.tag_ids:
            headers['X-Odoo-Tags'] = ','.join(self.tag_ids.mapped('name'))
        return headers

    def _message_post_after_hook(self, message, msg_vals):
        if message.attachment_ids and not self.displayed_image_id:
            image_attachments = message.attachment_ids.filtered(lambda a: a.mimetype == 'image')
            if image_attachments:
                self.displayed_image_id = image_attachments[0]

        if self.email_from and not self.partner_id:
            # we consider that posting a message with a specified recipient (not a follower, a specific one)
            # on a document without customer means that it was created through the chatter using
            # suggested recipients. This heuristic allows to avoid ugly hacks in JS.
            new_partner = message.partner_ids.filtered(lambda partner: partner.email == self.email_from)
            if new_partner:
                self.search([
                    ('partner_id', '=', False),
                    ('email_from', '=', new_partner.email),
                    ('stage_id.fold', '=', False)]).write({'partner_id': new_partner.id})
        return super(Task, self)._message_post_after_hook(message, msg_vals)

    def action_assign_to_me(self):
        self.write({'user_ids': [(4, self.env.user.id)]})

    def action_unassign_me(self):
        self.write({'user_ids': [Command.unlink(self.env.uid)]})

    # If depth == 1, return only direct children
    # If depth == 3, return children to third generation
    # If depth <= 0, return all children without depth limit
    def _get_all_subtasks(self, depth=0):
        children = self.mapped('child_ids')
        if not children:
            return self.env['project.task']
        if depth == 1:
            return children
        return children + children._get_all_subtasks(depth - 1)

    def action_open_parent_task(self):
        return {
            'name': _('Parent Task'),
            'view_mode': 'form',
            'res_model': 'project.task',
            'res_id': self.parent_id.id,
            'type': 'ir.actions.act_window',
            'context': self._context
        }

    # ------------
    # Actions
    # ------------

    def action_open_task(self):
        return {
            'view_mode': 'form',
            'res_model': 'project.task',
            'res_id': self.id,
            'type': 'ir.actions.act_window',
            'context': self._context
        }

    def action_dependent_tasks(self):
        self.ensure_one()
        action = {
            'res_model': 'project.task',
            'type': 'ir.actions.act_window',
            'context': {**self._context, 'default_depend_on_ids': [Command.link(self.id)], 'show_project_update': False},
            'domain': [('depend_on_ids', '=', self.id)],
        }
        if self.dependent_tasks_count == 1:
            action['view_mode'] = 'form'
            action['res_id'] = self.dependent_ids.id
            action['views'] = [(False, 'form')]
        else:
            action['name'] = _('Dependent Tasks')
            action['view_mode'] = 'tree,form,kanban,calendar,pivot,graph,activity'
        return action

    def action_recurring_tasks(self):
        return {
            'name': 'Tasks in Recurrence',
            'type': 'ir.actions.act_window',
            'res_model': 'project.task',
            'view_mode': 'tree,form,kanban,calendar,pivot,graph,activity',
            'domain': [('recurrence_id', 'in', self.recurrence_id.ids)],
        }

    def action_stop_recurrence(self):
        tasks = self.env['project.task'].with_context(active_test=False).search([('recurrence_id', 'in', self.recurrence_id.ids)])
        tasks.write({'recurring_task': False})
        self.recurrence_id.unlink()

    def action_continue_recurrence(self):
        self.recurrence_id = False
        self.recurring_task = False

    # ---------------------------------------------------
    # Rating business
    # ---------------------------------------------------

    def _send_task_rating_mail(self, force_send=False):
        for task in self:
            rating_template = task.stage_id.rating_template_id
            if rating_template:
                task.rating_send_request(rating_template, lang=task.partner_id.lang, force_send=force_send)

    def rating_get_partner_id(self):
        res = super(Task, self).rating_get_partner_id()
        if not res and self.project_id.partner_id:
            return self.project_id.partner_id
        return res

    def rating_apply(self, rate, token=None, feedback=None, subtype_xmlid=None):
        return super(Task, self).rating_apply(rate, token=token, feedback=feedback, subtype_xmlid="project.mt_task_rating")

    def _rating_get_parent_field_name(self):
        return 'project_id'

    def rating_get_rated_partner_id(self):
        """ Overwrite since we have user_ids and not user_id """
        tasks_with_one_user = self.filtered(lambda task: len(task.user_ids) == 1 and task.user_ids.partner_id)
        return tasks_with_one_user.user_ids.partner_id or self.env['res.partner']

    # ---------------------------------------------------
    # Privacy
    # ---------------------------------------------------
    def _change_project_privacy_visibility(self):
        for task in self.filtered(lambda t: t.project_privacy_visibility != 'portal'):
            portal_users = task.message_partner_ids.user_ids.filtered('share')
            task.message_unsubscribe(partner_ids=portal_users.partner_id.ids)

    # ---------------------------------------------------
    # Analytic accounting
    # ---------------------------------------------------
    def _get_task_analytic_account_id(self):
        self.ensure_one()
        return self.analytic_account_id or self.project_analytic_account_id

class ProjectTags(models.Model):
    """ Tags of project's tasks """
    _name = "project.tags"
    _description = "Project Tags"

    def _get_default_color(self):
        return randint(1, 11)

    name = fields.Char('Name', required=True)
    color = fields.Integer(string='Color', default=_get_default_color)

    _sql_constraints = [
        ('name_uniq', 'unique (name)', "Tag name already exists!"),
    ]
