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

from odoo import _, api, exceptions, fields, models
from odoo.addons.base.res.res_users import is_selection_groups


class Users(models.Model):
    """ Update of res.users class
        - add a preference about sending emails about notifications
        - make a new user follow itself
        - add a welcome message
        - add suggestion preference
        - if adding groups to an user, check mail.channels linked to this user
          group, and the user. This is done by overriding the write method.
    """
    _name = 'res.users'
    _inherit = ['res.users']

    alias_id = fields.Many2one('mail.alias', 'Alias', ondelete="set null", required=False,
            help="Email address internally associated with this user. Incoming "\
                 "emails will appear in the user's notifications.", copy=False, auto_join=True)
    alias_contact = fields.Selection([
        ('everyone', 'Everyone'),
        ('partners', 'Authenticated Partners'),
        ('followers', 'Followers only')], string='Alias Contact Security', related='alias_id.alias_contact')

    def __init__(self, pool, cr):
        """ Override of __init__ to add access rights on notification_email_send
            and alias fields. Access rights are disabled by default, but allowed
            on some specific fields defined in self.SELF_{READ/WRITE}ABLE_FIELDS.
        """
        init_res = super(Users, self).__init__(pool, cr)
        # duplicate list to avoid modifying the original reference
        type(self).SELF_WRITEABLE_FIELDS = list(self.SELF_WRITEABLE_FIELDS)
        type(self).SELF_WRITEABLE_FIELDS.extend(['notify_email'])
        # duplicate list to avoid modifying the original reference
        type(self).SELF_READABLE_FIELDS = list(self.SELF_READABLE_FIELDS)
        type(self).SELF_READABLE_FIELDS.extend(['notify_email'])
        return init_res

    @api.model
    def create(self, values):
        if not values.get('login', False):
            action = self.env.ref('base.action_res_users')
            msg = _("You cannot create a new user from here.\n To create new user please go to configuration panel.")
            raise exceptions.RedirectWarning(msg, action.id, _('Go to the configuration panel'))

        user = super(Users, self).create(values)

        # create a welcome message
        user._create_welcome_message()
        return user

    @api.multi
    def write(self, vals):
        write_res = super(Users, self).write(vals)
        sel_groups = [vals[k] for k in vals if is_selection_groups(k) and vals[k]]
        if vals.get('groups_id'):
            # form: {'group_ids': [(3, 10), (3, 3), (4, 10), (4, 3)]} or {'group_ids': [(6, 0, [ids]}
            user_group_ids = [command[1] for command in vals['groups_id'] if command[0] == 4]
            user_group_ids += [id for command in vals['groups_id'] if command[0] == 6 for id in command[2]]
            self.env['mail.channel'].search([('group_ids', 'in', user_group_ids)])._subscribe_users()
        elif sel_groups:
            self.env['mail.channel'].search([('group_ids', 'in', sel_groups)])._subscribe_users()
        return write_res

    def _create_welcome_message(self):
        self.ensure_one()
        if not self.has_group('base.group_user'):
            return False
        company_name = self.company_id.name if self.company_id else ''
        body = _('%s has joined the %s network.') % (self.name, company_name)
        # TODO change SUPERUSER_ID into user.id but catch errors
        return self.partner_id.sudo().message_post(body=body)

    def _message_post_get_pid(self):
        self.ensure_one()
        if 'thread_model' in self.env.context:
            self = self.with_context(thread_model='res.users')
        return self.partner_id.id

    @api.multi
    @api.returns('self', lambda value: value.id)
    def message_post(self, **kwargs):
        """ Redirect the posting of message on res.users as a private discussion.
            This is done because when giving the context of Chatter on the
            various mailboxes, we do not have access to the current partner_id. """
        current_pids = []
        partner_ids = kwargs.get('partner_ids', [])
        user_pid = self._message_post_get_pid()
        for partner_id in partner_ids:
            if isinstance(partner_id, (list, tuple)) and partner_id[0] == 4 and len(partner_id) == 2:
                current_pids.append(partner_id[1])
            elif isinstance(partner_id, (list, tuple)) and partner_id[0] == 6 and len(partner_id) == 3:
                current_pids.append(partner_id[2])
            elif isinstance(partner_id, (int, long)):
                current_pids.append(partner_id)
        if user_pid not in current_pids:
            partner_ids.append(user_pid)
        kwargs['partner_ids'] = partner_ids
        return self.env['mail.thread'].message_post(**kwargs)

    def message_update(self, msg_dict, update_vals=None):
        return True

    def message_subscribe(self, partner_ids=None, channel_ids=None, subtype_ids=None, force=True):
        return True

    @api.multi
    def message_partner_info_from_emails(self, emails, link_mail=False):
        return self.env['mail.thread'].message_partner_info_from_emails(emails, link_mail=link_mail)

    @api.multi
    def message_get_suggested_recipients(self):
        return dict((res_id, list()) for res_id in self._ids)


class res_groups_mail_channel(models.Model):
    """ Update of res.groups class
        - if adding users from a group, check mail.channels linked to this user
          group and subscribe them. This is done by overriding the write method.
    """
    _name = 'res.groups'
    _inherit = 'res.groups'

    @api.multi
    def write(self, vals, context=None):
        write_res = super(res_groups_mail_channel, self).write(vals)
        if vals.get('users'):
            # form: {'group_ids': [(3, 10), (3, 3), (4, 10), (4, 3)]} or {'group_ids': [(6, 0, [ids]}
            user_ids = [command[1] for command in vals['users'] if command[0] == 4]
            user_ids += [id for command in vals['users'] if command[0] == 6 for id in command[2]]
            self.env['mail.channel'].search([('group_ids', 'in', self._ids)])._subscribe_users()
        return write_res