# Copyright 2014 ABF OSIELL <http://osiell.com>
# License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl).
from odoo import api, fields, models


class ResUsers(models.Model):
    _inherit = 'res.users'

    role_line_ids = fields.One2many(
        comodel_name='res.users.role.line',
        inverse_name='user_id',
        string="Role lines",
        default=lambda self: self._default_role_lines()
    )
    role_ids = fields.One2many(
        comodel_name='res.users.role', string="Roles",
        compute='_compute_role_ids')

    @api.model
    def _default_role_lines(self):
        default_user = self.env.ref(
            'base.default_user', raise_if_not_found=False)
        default_values = []
        if default_user:
            for role_line in default_user.role_line_ids:
                default_values.append({
                    'role_id': role_line.role_id.id,
                    'date_from': role_line.date_from,
                    'date_to': role_line.date_to,
                    'is_enabled': role_line.is_enabled,
                })
        return default_values

    @api.multi
    @api.depends('role_line_ids.role_id')
    def _compute_role_ids(self):
        for user in self:
            user.role_ids = user.role_line_ids.mapped('role_id')

    @api.model
    def create(self, vals):
        new_record = super(ResUsers, self).create(vals)
        new_record.set_groups_from_roles()
        return new_record

    @api.multi
    def write(self, vals):
        res = super(ResUsers, self).write(vals)
        self.sudo().set_groups_from_roles()
        return res

    @api.multi
    def _get_enabled_roles(self):
        return self.role_line_ids.filtered(
            lambda rec: rec.is_enabled and
            (not rec.company_id or rec.company_id == rec.user_id.company_id))

    def set_groups_from_roles(self, force=False):
        """Set (replace) the groups following the roles defined on users.
        If no role is defined on the user, its groups are let untouched unless
        the `force` parameter is `True`.
        """
        role_groups = {}
        # We obtain all the groups associated to each role first, so that
        # it is faster to compare later with each user's groups.
        for role in self.mapped('role_line_ids.role_id'):
            role_groups[role] = list(set(
                role.group_id.ids + role.implied_ids.ids +
                role.trans_implied_ids.ids))
        for user in self:
            if not user.role_line_ids and not force:
                continue
            group_ids = []
            for role_line in user._get_enabled_roles():
                role = role_line.role_id
                group_ids += role_groups[role]
            group_ids = list(set(group_ids))    # Remove duplicates IDs
            groups_to_add = list(set(group_ids) - set(user.groups_id.ids))
            groups_to_remove = list(set(user.groups_id.ids) - set(group_ids))
            to_add = [(4, gr) for gr in groups_to_add]
            to_remove = [(3, gr) for gr in groups_to_remove]
            groups = to_remove + to_add
            if groups:
                vals = {
                    'groups_id': groups,
                }
                super(ResUsers, user).write(vals)
        return True