# -*- coding: utf-8 -*-
# © 2010-2016 Akretion (Alexis de Lattre <alexis.delattre@akretion.com>)
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).

from odoo import models, fields, api, _
from odoo.exceptions import UserError, ValidationError


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

    internal_number = fields.Char(
        string='Internal Number', copy=False,
        help="User's internal phone number.")
    dial_suffix = fields.Char(
        string='User-specific Dial Suffix',
        help="User-specific dial suffix such as aa=2wb for SCCP auto answer.")
    callerid = fields.Char(
        string='Caller ID', copy=False,
        help="Caller ID used for the calls initiated by this user.")
    # You'd probably think: Asterisk should reuse the callerID of sip.conf!
    # But it cannot, cf
    # http://lists.digium.com/pipermail/asterisk-users/
    # 2012-January/269787.html
    cdraccount = fields.Char(
        string='CDR Account',
        help="Call Detail Record (CDR) account used for billing this user.")
    asterisk_chan_type = fields.Selection([
        ('SIP', 'SIP'),
        ('IAX2', 'IAX2'),
        ('DAHDI', 'DAHDI'),
        ('Zap', 'Zap'),
        ('Skinny', 'Skinny'),
        ('MGCP', 'MGCP'),
        ('mISDN', 'mISDN'),
        ('H323', 'H323'),
        ('SCCP', 'SCCP'),
        # Local works for click2dial, but it won't work in
        # _get_calling_number() when trying to identify the
        # channel of the user, so it's better not to propose it
        # ('Local', 'Local'),
        ], string='Asterisk Channel Type', default='SIP',
        help="Asterisk channel type, as used in the Asterisk dialplan. "
        "If the user has a regular IP phone, the channel type is 'SIP'.")
    resource = fields.Char(
        string='Resource Name', copy=False,
        help="Resource name for the channel type selected. For example, "
        "if you use 'Dial(SIP/phone1)' in your Asterisk dialplan to ring "
        "the SIP phone of this user, then the resource name for this user "
        "is 'phone1'.  For a SIP phone, the phone number is often used as "
        "resource name, but not always.")
    alert_info = fields.Char(
        string='User-specific Alert-Info SIP Header',
        help="Set a user-specific Alert-Info header in SIP request to "
        "user's IP Phone for the click2dial feature. If empty, the "
        "Alert-Info header will not be added. You can use it to have a "
        "special ring tone for click2dial (a silent one !) or to "
        "activate auto-answer for example.")
    variable = fields.Char(
        string='User-specific Variable',
        help="Set a user-specific 'Variable' field in the Asterisk "
        "Manager Interface 'originate' request for the click2dial "
        "feature. If you want to have several variable headers, separate "
        "them with '|'.")
    asterisk_server_id = fields.Many2one(
        'asterisk.server', string='Asterisk Server',
        help="Asterisk server on which the user's phone is connected. "
        "If you leave this field empty, it will use the first Asterisk "
        "server of the user's company.")

    @api.multi
    @api.constrains('resource', 'internal_number', 'callerid')
    def _check_validity(self):
        for user in self:
            strings_to_check = [
                (_('Resource Name'), user.resource),
                (_('Internal Number'), user.internal_number),
                (_('Caller ID'), user.callerid),
                ]
            for check_string in strings_to_check:
                if check_string[1]:
                    try:
                        check_string[1].encode('ascii')
                    except UnicodeEncodeError:
                        raise ValidationError(_(
                            "The '%s' for the user '%s' should only have "
                            "ASCII caracters")
                            % (check_string[0], user.name))

    @api.multi
    def get_asterisk_server_from_user(self):
        '''Returns an asterisk.server recordset'''
        self.ensure_one()
        # We check if the user has an Asterisk server configured
        if self.asterisk_server_id:
            ast_server = self.asterisk_server_id
        else:
            asterisk_servers = self.env['asterisk.server'].search(
                [('company_id', '=', self.company_id.id)])
            # If the user doesn't have an asterisk server,
            # we take the first one of the user's company
            if not asterisk_servers:
                raise UserError(
                    _("No Asterisk server configured for the company '%s'.")
                    % self.company_id.name)
            else:
                ast_server = asterisk_servers[0]
        return ast_server