from enum import IntEnum

from django.contrib.auth.models import User
from django.contrib.sites.models import Site
from django.core.urlresolvers import reverse
from django.db import models
from django.utils.translation import ugettext_lazy as _
from django.utils.translation import ugettext

from ponyconf.utils import PonyConfModel, enum_to_choices

from .utils import generate_user_uid


class Profile(PonyConfModel):

    user = models.OneToOneField(User)
    biography = models.TextField(blank=True, verbose_name=_('Biography'))
    email_token = models.CharField(max_length=12, default=generate_user_uid, unique=True)

    def __str__(self):
        return self.user.get_full_name() or self.user.username

    def get_absolute_url(self):
        return reverse('profile')


class Option(models.Model):
    name = models.CharField(max_length=64, unique=True)

    class Meta:
        abstract = True

    def __str__(self):
        return ugettext(self.name)


class Transport(Option):
    pass


class Connector(Option):
    pass


class Participation(PonyConfModel):

    LICENCES = IntEnum('Video licence', 'CC-Zero CC-BY CC-BY-SA CC-BY-ND CC-BY-NC CC-BY-NC-SA CC-BY-NC-ND')

    site = models.ForeignKey(Site, on_delete=models.CASCADE)
    user = models.ForeignKey(User)


    need_transport = models.BooleanField(verbose_name=_('Need transport?'), default=False)
    arrival = models.DateTimeField(blank=True, null=True)
    departure = models.DateTimeField(blank=True, null=True)
    transport = models.ManyToManyField(Transport, verbose_name=_("I'm ok to travel by"), blank=True)
    transport_booked = models.BooleanField(default=False)

    need_hosting = models.BooleanField(verbose_name=_('Need hosting?'), default=False)
    homestay = models.BooleanField(verbose_name=_('Ok for homestay?'), default=False)
    hosting_booked = models.BooleanField(default=False)

    constraints = models.TextField(blank=True, verbose_name=_("Constraints"))
    connector = models.ManyToManyField(Connector, verbose_name=_("I can output"), blank=True)
    sound = models.BooleanField(_("I need sound"), default=False)

    videotaped = models.BooleanField(_("I'm ok to be recorded on video"), default=True)
    video_licence = models.IntegerField(choices=enum_to_choices(LICENCES), default=2, verbose_name=_("Video licence"))

    notes = models.TextField(default='', blank=True, verbose_name=_("Notes"))
    orga = models.BooleanField(default=False)

    class Meta:
        # A User can participe only once to a Conference (= Site)
        unique_together = ('site', 'user')

    def __str__(self):
        return str(self.user.profile)

    def get_absolute_url(self):
        return reverse('show-speaker', kwargs={'username': self.user.username})

    def is_orga(self):
        return self.orga

    def is_staff(self):
        return self.is_orga() or self.topic_set.exists()

    @property
    def topic_set(self):
        return self.user.topic_set.filter(site=self.site)

    @property
    def talk_set(self):
        return self.user.talk_set.filter(site=self.site)