from django.contrib.postgres.fields import JSONField
from django.db import models
from django.utils.translation import gettext_lazy as _

from utils.models import ProjectBaseMixin, BaseAttributes, LocaleManagerMixin


class NewsType(models.Model):
    """NewsType model."""
    name = models.CharField(_('name'), max_length=250)

    class Meta:
        verbose_name_plural = _('news types')
        verbose_name = _('news type')

    def __str__(self):
        return self.name


class NewsManager(LocaleManagerMixin):
    """Manager for model News"""


class NewsQuerySet(models.QuerySet):
    """QuerySet for model News"""
    def by_type(self, news_type):
        """Filter News by type"""
        return self.filter(news_type__name=news_type)


class News(BaseAttributes):
    """News model."""
    news_type = models.ForeignKey(
        NewsType, verbose_name=_('news type'), on_delete=models.CASCADE)

    title = JSONField(
        _('title'), null=True, blank=True,
        default=None, help_text='{"en":"some text"}')
    subtitle = JSONField(
        _('subtitle'), null=True, blank=True,
        default=None, help_text='{"en":"some text"}'
    )
    description = JSONField(
        _('subtitle'), null=True, blank=True,
        default=None, help_text='{"en":"some text"}'
    )
    start = models.DateTimeField(_('start'))
    end = models.DateTimeField(_('end'))
    playlist = models.IntegerField(_('playlist'))
    address = models.ForeignKey(
        'location.Address', verbose_name=_('address'), blank=True,
        null=True, default=None, on_delete=models.CASCADE)
    # TODO: metadata_keys - описание ключей для динамического построения полей метаданных
    # TODO: metadata_values - Описание значений для динамических полей из MetadataKeys

    objects = NewsManager.from_queryset(NewsQuerySet)()

    class Meta:
        verbose_name = _('news')
        verbose_name_plural = _('news')

    def __str__(self):
        return f'news: {self.id}'