from django.db import models
from django.db.models import DateField, \
    CharField, \
    BooleanField, \
    IntegerField, \
    TextField

import datetime


class Publication(models.Model):
    num = CharField('Numéro du BOcal', max_length=128)
    url = CharField('Adresse sur le site', max_length=512)
    # ^ This is not a URLField because we need internal URLS, eg `/static/blah`

    date = DateField('Publication')
    is_special = BooleanField('Numéro spécial',
                              help_text='Numéro du BOcal non-numéroté',
                              default=False)
    descr = CharField('Description (optionnelle)',
                      max_length=512,
                      blank=True)
    custom_name = CharField('Nom customisé',
                            help_text='Vide pour laisser le numéro seulement',
                            max_length=128,
                            blank=True)

    def __str__(self):
        if self.custom_name:
            return self.custom_name
        return 'BOcal n°{}'.format(self.num)

    class Meta:
        ordering = ['date']


class PublicationYear(models.Model):
    startYear = IntegerField('Année de début',
                             help_text='Année scolaire à partir du 1/08',
                             primary_key=True)
    descr = TextField('Accroche de l\'année')

    def __str__(self):
        return '{}-{}'.format(self.startYear, self.startYear+1)

    def beg(self):
        ''' First day of this publication year (incl.) '''
        return datetime.date(self.startYear, 8, 1)

    def end(self):
        ''' Last day of this publication year (excl.) '''
        return datetime.date(self.startYear + 1, 8, 1)

    def inYear(self, date):
        return self.beg() <= date < self.end()

    def publis(self):
        ''' List of publications from this year '''
        return Publication.objects.filter(
            date__gte=self.beg(),
            date__lt=self.end())

    @property
    def url(self):
        return '/{}/'.format(self)

    @property
    def prettyName(self):
        return '{} – {}'.format(self.startYear, self.startYear+1)