from pydantic import BaseModel
from datetime import datetime
from typing import Optional


class CategoryBase(BaseModel):
    name: str
    description: Optional[str] = None


class CategoryCreate(CategoryBase):
    pass


class CategoryUpdate(BaseModel):
    name: Optional[str] = None
    description: Optional[str] = None


class Category(CategoryBase):
    id: int
    created_at: datetime
    updated_at: datetime

    class Config:
        from_attributes = True