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

class TaskStatus(str, Enum):
    TODO = "A faire"
    IN_PROGRESS = "En cours"
    DONE = "Termine"

class TaskBase(SQLModel):
    title: str = Field(index=True, min_length=1, max_length=100)
    description: Optional[str] = Field(default=None)
    status: TaskStatus = Field(default=TaskStatus.TODO)

class TaskCreate(TaskBase):
    pass

class TaskUpdate(SQLModel):
    title: Optional[str] = Field(default=None, min_length=1, max_length=100)
    description: Optional[str] = None
    status: Optional[TaskStatus] = None

class TaskResponse(TaskBase):
    id: UUID
    created_at: datetime
    updated_at: datetime

class Task(TaskBase, table=True):
    __tablename__ = "tasks"

    id: UUID = Field(default_factory=uuid4, primary_key=True, index=True)
    created_at: datetime = Field(default_factory=datetime.utcnow, nullable=False)
    updated_at: datetime = Field(default_factory=datetime.utcnow, nullable=False)