# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import datetime
import logging
import uuid
from django.db import models
from django.urls import reverse
from django.utils import timezone
from django.utils.encoding import python_2_unicode_compatible
from django.utils.translation import ugettext_lazy as _

from dav_events.models.event import Event

from . import signals
from .validators import DAVNumberValidator

logger = logging.getLogger(__name__)

midnight = datetime.time(00, 00, 00)
one_day = datetime.timedelta(1)


@python_2_unicode_compatible
class Registration(models.Model):
    event = models.ForeignKey(Event, related_name='registrations')
    created_at = models.DateTimeField(auto_now_add=True)

    personal_names = models.CharField(max_length=1024,
                                      verbose_name=_('Vorname(n)'))
    family_names = models.CharField(max_length=1024,
                                    verbose_name=_('Familienname'))

    address = models.CharField(max_length=1024,
                               verbose_name=_('Anschrift'),
                               help_text=_('Straße, Hausnummer'))
    postal_code = models.CharField(max_length=254,
                                   verbose_name=_('Postleitzahl'))
    city = models.CharField(max_length=1024,
                            verbose_name=_('Ort'))
    email_address = models.EmailField(verbose_name=_('E-Mail-Adresse'))
    phone_number = models.CharField(max_length=254,
                                    verbose_name=_('Telefonnummer'),
                                    help_text=_('Idealerweise eine Mobilfunk-Nummer'))
    dav_number = models.CharField(max_length=62,
                                  validators=[DAVNumberValidator],
                                  verbose_name=_('DAV Mitgliednummer'),
                                  help_text='%s<br /> %s %s' % (
                                      _('Deine Mitgliedsnummer findest du unter dem Strichcode'
                                        ' auf deinem DAV Ausweis.'),
                                      _('Beispiel: <tt>131/00/012345</tt>'),
                                      _('(der Teil bis zum ersten * genügt)'),
                                  ))
    emergency_contact = models.TextField(blank=True,
                                         verbose_name=_('Notfall-Kontakt'),
                                         help_text=_('Name und Telefonnummer bzw. Anschrift,'
                                                     ' die in Notfällen informiert werden soll.'))
    experience = models.TextField(blank=True,
                                  verbose_name=_('Erfahrung'),
                                  help_text=_('Welche Touren oder Kurse hast du bereits gemacht?'))
    note = models.TextField(blank=True,
                            verbose_name=_('Anmerkung'),
                            help_text='%s<br /> %s' % (
                                _('Wissenswertes für den Tourenleiter, z.B. Allergien,'
                                  ' gesundheitliche Einschränkungen, ...'),
                                _('Kann frei gelassen werden.'))
                            )

    privacy_policy = models.TextField(blank=True,
                                      verbose_name=_('Erklärung zur Datenspeicherung'))
    privacy_policy_accepted = models.BooleanField(default=False,
                                                  verbose_name=_('Einwilligung zur Datenspeicherung'))
    purge_at = models.DateTimeField()

    class Meta:
        verbose_name = _('Anmeldung')
        verbose_name_plural = _('Anmeldungen')
        ordering = ['created_at']

    def __str__(self):
        return '{number} - {name} ({created} - {purge})'.format(number=self.event.get_number(),
                                                                name=self.get_full_name(),
                                                                created=self.created_at.strftime('%d.%m.%Y %H:%M'),
                                                                purge=self.purge_at.strftime('%d.%m.%Y %H:%M'))

    def get_absolute_url(self):
        return reverse('dav_registration:registered')

    def get_full_name(self):
        return '{} {}'.format(self.personal_names, self.family_names)

    def save(self, **kwargs):
        creating = False
        if not self.id:
            creating = True

        if self.event:
            self.purge_at = self.__class__.calc_purge_at(self.event)

        super(Registration, self).save(**kwargs)

        if creating:
            logger.info('Registration stored: %s', self)
            signals.registration_created.send(sender=self.__class__, registration=self)

    @classmethod
    def calc_purge_at(cls, event):
        if event.alt_last_day:
            last_day = event.alt_last_day
        elif event.last_day:
            last_day = event.last_day
        elif event.alt_first_day:
            last_day = event.alt_first_day
        else:
            last_day = event.first_day
        return timezone.make_aware(datetime.datetime.combine(last_day + one_day * 7, midnight))