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

User = get_user_model()

class MasterKey(models.Model):
    key_id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    key_value = models.CharField(max_length=255, unique=True)
    description = models.CharField(max_length=255, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    last_used = models.DateTimeField(null=True, blank=True)
    is_active = models.BooleanField(default=True)
    permissions = models.JSONField(default=list)
    
    def __str__(self):
        return f"Master Key: {self.key_id}"
    
    @classmethod
    def generate_key(cls, description="", permissions=None):
        """Generate a new secure master key"""
        if permissions is None:
            permissions = []
            
        # Generate a secure random token
        key_value = secrets.token_urlsafe(64)
        
        return cls.objects.create(
            key_value=key_value,
            description=description,
            permissions=permissions
        )

class AiModel(models.Model):
    name = models.CharField(max_length=255)

class Conversation(models.Model):
    title = models.CharField(max_length=255)
    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name="conversations")

class Message(models.Model):
    content = models.TextField()
    role = models.CharField(max_length=255)
    conversation = models.ForeignKey(Conversation, on_delete=models.CASCADE, related_name="messages")