# -*- coding: utf-8 -*-

""" relation module """

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

class relation(models.Model):
    """ relation model """
    _name = 'coworking.relation'
    _description = 'relation model definition'
    _rec_name = 'title'
    _order = 'id asc'

    title = fields.Char(required=True)

    manager_id = fields.Many2one('coworking.coworker', 'Manager', index=True, required=True,
                                 domain="[('coworker_type', 'in', ['staffer', 'member'])]")
    date_start = fields.Datetime(default=fields.Date.context_today, required=True)
    starts_this_week = fields.Integer(compute='_compute_starts_this_week',
                                      search='_search_starts_this_week')
    date_end = fields.Datetime(required=True)

    duration = fields.Float(compute='_compute_duration')
    description = fields.Text()
    statut = fields.Selection([('draft', 'Draft'),
                               ('confirmed', 'Confirmed'),
                               ('canceled', 'Canceled')], default='draft')

    participants_ids = fields.Many2many('coworking.coworker', string='Subscribers')
    participants_count = fields.Integer('Number of participants',
                                        compute='_compute_participants_count')



    @api.depends('date_start')
    def _compute_starts_this_week(self):
        """ Computes is relation starts this week """
        for relation in self:
            date_start = fields.Datetime.from_string(relation.date_start)
            week_start = date_start.isocalendar()[1]
            relation.starts_this_week = (datetime.now().isocalendar()[1] == week_start)

    def _search_starts_this_week(self, operator, value):
        """ Searches function for starts_this_week """
        res_ids = []
        for relation in self.search([]):
            date_start = fields.Datetime.from_string(relation.date_start)
            week_start = date_start.isocalendar()[1]
            if datetime.now().isocalendar()[1] == week_start:
                res_ids.append(relation.id)
        if operator == '=':
            operator = 'in'if value else 'not in'
        else:
            operator = 'not in'if value else 'in'
        return [('id', operator, res_ids)]

    @api.depends('participants_ids')
    def _compute_participants_count(self):
        """ Computes number of participants """
        for relation in self:
            relation.participants_count = len(relation.participants_ids)

    @api.constrains('statut', 'participants_ids')
    def _check_if_confirmed(self):
        """Test si participants_ids est confirmed"""
        for relation in self:
            if relation.participants_ids and relation.statut == 'draft':
                raise models.ValidationError(_('You can have subscribed people '
                                               'if relation is not confirmed yet'))

    @api.constrains('date_start', 'date_end')
    def _check_dates(self):
        """Test si la modification de la date de début est infnérieure à la date de fin"""
        if self.date_start > self.date_end:
            raise ValidationError(_('End date most be supperior to to start date'))

    @api.depends('date_start', 'date_end')
    def _compute_duration(self):
        for relation in self:
            if relation.date_start and relation.date_end:
                date_end_py = fields.Datetime.from_string(relation.date_end)
                date_start_py = fields.Datetime.from_string(relation.date_start)
                delta = date_end_py - date_start_py
                relation.duration = delta.days * 24.0 + round(float(delta.seconds) / 3600.0)
            else:
                relation.duration = 0.0