from django.db import models
from django.contrib.auth import get_user_model

from core.models import BaseModel

User = get_user_model()


class AnnouncementType(models.TextChoices):
    GENERAL = 'general', 'General'
    EVENT = 'event', 'Event'
    ACADEMIC = 'academic', 'Academic'
    URGENT = 'urgent', 'Urgent'


class AnnouncementPriority(models.TextChoices):
    LOW = 'low', 'Low'
    NORMAL = 'normal', 'Normal'
    HIGH = 'high', 'High'
    URGENT = 'urgent', 'Urgent'


class Announcement(BaseModel):
    title = models.CharField(max_length=200, verbose_name='Title')
    content = models.TextField(verbose_name='Content')
    announcement_type = models.CharField(
        max_length=20,
        choices=AnnouncementType.choices,
        default=AnnouncementType.GENERAL,
        verbose_name='Type'
    )
    priority = models.CharField(
        max_length=10,
        choices=AnnouncementPriority.choices,
        default=AnnouncementPriority.NORMAL,
        verbose_name='Priority'
    )
    author = models.ForeignKey(
        User,
        on_delete=models.CASCADE,
        related_name='announcements',
        verbose_name='Author'
    )
    is_published = models.BooleanField(default=False, verbose_name='Published')
    publish_date = models.DateTimeField(null=True, blank=True, verbose_name='Publish Date')

    class Meta:
        verbose_name = 'Announcement'
        verbose_name_plural = 'Announcements'
        ordering = ['-created_at']

    def __str__(self):
        return self.title

    @property
    def content_html(self):
        """Convert markdown content to HTML"""
        import markdown
        return markdown.markdown(self.content)


class PushNotificationDevice(BaseModel):
    user = models.ForeignKey(
        User,
        on_delete=models.CASCADE,
        related_name='push_devices',
        verbose_name='User'
    )
    device_token = models.TextField(verbose_name='Device Token')
    device_type = models.CharField(
        max_length=10,
        choices=[
            ('web', 'Web'),
            ('android', 'Android'),
            ('ios', 'iOS'),
        ],
        verbose_name='Device Type'
    )
    is_active = models.BooleanField(default=True, verbose_name='Active')

    class Meta:
        verbose_name = 'Push Notification Device'
        verbose_name_plural = 'Push Notification Devices'
        unique_together = ['user', 'device_token']

    def __str__(self):
        return f"{self.user.username} - {self.device_type}"