from django.db import models
from django.contrib.postgres.fields import DateTimeRangeField, JSONField
from django.utils.translation import ugettext_lazy as _
from django.utils import timezone
from django.core.urlresolvers import reverse_lazy

from bornhack.utils import CreatedUpdatedModel, UUIDModel

from .managers import TicketTypeQuerySet


class Ticket(CreatedUpdatedModel, UUIDModel):
    class Meta:
        verbose_name = _('Ticket')
        verbose_name_plural = _('Tickets')

    user = models.ForeignKey(
        'auth.User',
        verbose_name=_('User'),
        help_text=_('The user this ticket belongs to.'),
        related_name='tickets',
    )

    paid = models.BooleanField(
        verbose_name=_('Paid?'),
        help_text=_('Whether the user has paid.'),
        default=False,
    )

    ticket_type = models.ForeignKey(
        'tickets.TicketType',
        verbose_name=_('Ticket type'),
    )

    CREDIT_CARD = 'credit_card'
    ALTCOIN = 'altcoin'
    BANK_TRANSFER = 'bank_transfer'

    PAYMENT_METHODS = [
        (CREDIT_CARD, 'Credit card'),
        (ALTCOIN, 'Altcoin'),
        (BANK_TRANSFER, 'Bank transfer'),
    ]

    payment_method = models.CharField(
        max_length=50,
        choices=PAYMENT_METHODS,
        default=CREDIT_CARD
    )

    def __str__(self):
        return '{} ({})'.format(
            self.ticket_type.name,
            self.ticket_type.camp
        )

    def get_absolute_url(self):
        return reverse_lazy('tickets:detail', kwargs={
            'pk': self.pk
        })


class TicketType(CreatedUpdatedModel, UUIDModel):
    class Meta:
        verbose_name = _('Ticket Type')
        verbose_name_plural = _('Ticket Types')
        ordering = ['available_in']

    name = models.CharField(max_length=150)

    camp = models.ForeignKey(
        'camps.Camp',
        verbose_name=_('Camp'),
        help_text=_('The camp this ticket type is for.'),
    )

    price = models.IntegerField(
        help_text=_('Price of the ticket (in DKK).')
    )

    available_in = DateTimeRangeField(
        help_text=_(
            'Which period is this ticket available for purchase? | '
            '(Format: YYYY-MM-DD HH:MM) | Only one of start/end is required'
        )
    )

    objects = TicketTypeQuerySet.as_manager()

    def __str__(self):
        return '{} ({} DKK)'.format(
            self.name,
            self.price,
        )

    def is_available(self):
        now = timezone.now()
        return now in self.available_in


class EpayCallback(CreatedUpdatedModel, UUIDModel):
    class Meta:
        verbose_name = 'Epay Callback'
        verbose_name_plural = 'Epay Callbacks'
    payload = JSONField()


class EpayPayment(CreatedUpdatedModel, UUIDModel):
    class Meta:
        verbose_name = 'Epay Payment'
        verbose_name_plural = 'Epay Payments'

    ticket = models.OneToOneField('tickets.Ticket')
    callback = models.ForeignKey('tickets.EpayCallback')
    txnid = models.IntegerField()