from django.core.urlresolvers import reverse
from django.db import models
from django.utils import timezone


def photo_filename(instance, filename):
    from slugify import slugify_filename

    return 'photo_uploads/' + slugify_filename(filename)


class News(models.Model):
    created = models.DateTimeField('Дата и время', auto_now_add=True, editable=False)
    title = models.CharField('Заголовок', max_length=512, null=False, blank=False, unique=True)
    slug = models.SlugField('Ссылка', max_length=512, null=False, blank=False, unique=True)
    text = models.TextField('Новость', null=False, blank=False)
    is_public = models.BooleanField('Публиковать', default=True)
    image = models.ImageField('Картинка', upload_to=photo_filename)
    tags_list = models.ManyToManyField('NewsTag', blank=True)

    class Meta:
        verbose_name = 'новость'
        verbose_name_plural = 'новости'

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        return reverse('news_detail', args=(self.slug,))


class NewsTag(models.Model):
    title = models.CharField('Заголовок', max_length=512, null=False, blank=False, unique=True)
    slug = models.SlugField('Ссылка', max_length=512, null=False, blank=False, unique=True)
    news_list = models.ManyToManyField(News, blank=True)

    class Meta:
        verbose_name = 'тег'
        verbose_name_plural = 'теги'

    def __str__(self):
        return self.title


class NewsComment(models.Model):
    created = models.DateTimeField('Дата и время', auto_now_add=True, editable=False)
    name = models.CharField('Имя', max_length=45, null=False, blank=False)
    email = models.EmailField('Email (не будет опубликован)', null=False, blank=False)
    text = models.TextField('Комментарий', null=False, blank=False)
    reply_to = models.ForeignKey('self', null=True, blank=True)
    news = models.ForeignKey(News, related_name='comments')

    class Meta:
        verbose_name = 'комментарий'
        verbose_name_plural = 'комментарии'

    def __str__(self):
        return '{}: {}'.format(self.name, self.news.title)