from django.db import models
from django.contrib.auth.models import User
from taggit.managers import TaggableManager
import secrets

class Team(models.Model):
    name = models.CharField(max_length=255)
    description = models.TextField(blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)
    members = models.ManyToManyField(User, through='TeamMembership', related_name='teams')

    def __str__(self):
        return self.name

class TeamMembership(models.Model):
    ROLE_CHOICES = [
        ('OWNER', 'Owner'),
        ('ADMIN', 'Admin'),
        ('MEMBER', 'Member'),
    ]
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    team = models.ForeignKey(Team, on_delete=models.CASCADE)
    role = models.CharField(max_length=10, choices=ROLE_CHOICES, default='MEMBER')
    joined_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        unique_together = ('user', 'team')

class Bookmark(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='bookmarks')
    url = models.URLField(max_length=1000)
    title = models.CharField(max_length=255, blank=True)
    notes = models.TextField(blank=True)
    is_favorite = models.BooleanField(default=False)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)
    
    tags = TaggableManager()

    def __str__(self):
        return self.title or self.url

class BookmarkShare(models.Model):
    bookmark = models.ForeignKey(Bookmark, on_delete=models.CASCADE, related_name='shares')
    team = models.ForeignKey(Team, on_delete=models.CASCADE, related_name='shared_bookmarks')
    shared_by = models.ForeignKey(User, on_delete=models.CASCADE)
    shared_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        unique_together = ('bookmark', 'team')

class Extraction(models.Model):
    bookmark = models.OneToOneField(Bookmark, on_delete=models.CASCADE, related_name='extraction')
    content_html = models.TextField(blank=True)
    content_text = models.TextField(blank=True)
    metadata = models.JSONField(default=dict, blank=True)
    extracted_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return f"Extraction for {self.bookmark}"

class Summary(models.Model):
    bookmark = models.OneToOneField(Bookmark, on_delete=models.CASCADE, related_name='summary')
    content = models.TextField()
    generated_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return f"Summary for {self.bookmark}"

class APIToken(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='api_tokens')
    token = models.CharField(max_length=64, unique=True, editable=False)
    name = models.CharField(max_length=255, help_text="A recognizable name for this token (e.g. 'Mobile App')", default="Default Token")
    created_at = models.DateTimeField(auto_now_add=True)
    last_used_at = models.DateTimeField(null=True, blank=True)
    is_active = models.BooleanField(default=True)

    def save(self, *args, **kwargs):
        if not self.token:
            self.token = secrets.token_hex(20)
        super().save(*args, **kwargs)

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