from sqlmodel import SQLModel, Field, Relationship
from typing import TYPE_CHECKING, Optional
from datetime import datetime
import uuid

if TYPE_CHECKING:
    from models.user import User

class TaskBase(SQLModel):
    title: str = Field(min_length=1, max_length=255)
    description: Optional[str] = Field(default=None, max_length=1000)
    completed: bool = Field(default=False)

class Task(TaskBase, table=True):
    id: uuid.UUID = Field(default_factory=uuid.uuid4, primary_key=True)
    user_id: uuid.UUID = Field(foreign_key="user.id", nullable=False)
    created_at: datetime = Field(default_factory=datetime.utcnow)
    updated_at: datetime = Field(default_factory=datetime.utcnow)
    
    # Relationship to User
    user: "User" = Relationship(back_populates="tasks")