# Copyright (C) 2019 Open Source Integrators
# <https://www.opensourceintegrators.com>
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).


from odoo import api, fields, models
from datetime import datetime, timedelta
from odoo.tools import DEFAULT_SERVER_DATETIME_FORMAT
from pytz import timezone


class BackendVoicent(models.Model):
    _name = 'backend.voicent'
    _description = 'Voicent Backend'
    _inherit = ['connector.backend']

    name = fields.Char(string='Name', required=True)
    host = fields.Char(string='Host', default='localhost', required=True)
    port = fields.Integer(string='Port', default='8155', required=True)
    callerid = fields.Char(string='Caller ID', required=True)
    line = fields.Integer(string='Number of lines', required=True)
    next_call = fields.Datetime(string='Next Call', copy=False)
    call_line_ids = fields.One2many(
        string='Call Lines',
        comodel_name='backend.voicent.call.line',
        inverse_name='backend_id')
    time_line_ids = fields.One2many(
        string='Call Times',
        comodel_name='backend.voicent.time.line',
        inverse_name='backend_id')
    active = fields.Boolean('Active', default=True)

    @api.model
    def _run_update_next_call(self):
        """ This method is called from a cron job. """

        cr_time_list = []
        backends = self.search([('active', '=', True)])
        for backend in backends:
            current_dt = datetime.now(timezone('UTC'))
            user_tz = timezone(
                self.env.context.get('tz') or self.env.user.tz or 'UTC')
            dt_value = current_dt.astimezone(user_tz)
            convt_dt_strf = dt_value.strftime(DEFAULT_SERVER_DATETIME_FORMAT)
            convt_dt = datetime.strptime(
                convt_dt_strf,
                DEFAULT_SERVER_DATETIME_FORMAT)
            current_time = convt_dt.strftime("%H:%M")
            for time_line_rec in backend.time_line_ids:
                hours, minutes = divmod(abs(time_line_rec.time) * 60, 60)
                minutes = round(minutes)
                if minutes == 60:
                    minutes = 0
                    hours += 1
                line_time = '%02d:%02d' % (hours, minutes)
                cr_time_list.append(line_time)
            cr_time_list = sorted(cr_time_list)
            next_call = False
            for time_entry in cr_time_list:
                if time_entry > current_time:
                    next_call = datetime.now().replace(
                        hour=int(time_entry.split(':')[0]),
                        minute=int(time_entry.split(':')[1]),
                        second=0)
                    break
            if not next_call:
                next_call = datetime.now().replace(
                    hour=int(cr_time_list[0].split(':')[0]),
                    minute=int(cr_time_list[0].split(':')[1]),
                    second=0) + timedelta(
                    days=1)
            next_call_tz = timezone(self.env.context.get('tz') or
                                    self.env.user.tz).localize(next_call,
                                                               is_dst=False)
            next_call_utc = next_call_tz.astimezone(timezone('UTC'))
            next_call_utc = datetime.strptime(
                fields.Datetime.to_string(next_call_utc),
                DEFAULT_SERVER_DATETIME_FORMAT)
            backend.next_call = fields.Datetime.to_string(next_call_utc)