from sqlmodel import SQLModel, Field
from datetime import datetime
from typing import Optional
from uuid import UUID, uuid4

class Favorite(SQLModel, table=True):
    __tablename__ = "favorites"
    
    id: Optional[UUID] = Field(default_factory=uuid4, primary_key=True)
    user_id: UUID = Field(foreign_key="users.id", index=True)
    
    # Type of favorite: 'coupon', 'business', 'taxi', 'route'
    item_type: str = Field(index=True)
    item_id: str = Field(index=True)
    
    # Optional metadata
    item_name: Optional[str] = None
    item_image: Optional[str] = None
    
    created_at: datetime = Field(default_factory=datetime.utcnow)
    
    class Config:
        json_schema_extra = {
            "example": {
                "user_id": "user-123",
                "item_type": "coupon",
                "item_id": "coupon-456",
                "item_name": "50% descuento en restaurante",
                "item_image": "/uploads/coupon.jpg"
            }
        }