from datetime import datetime
from typing import Optional

from pydantic import BaseModel, Field


class ItemBase(BaseModel):
    """Base schema for Item with common attributes."""

    title: str = Field(..., min_length=1, max_length=100, description="Item title")
    description: Optional[str] = Field(None, description="Optional item description")
    is_active: bool = Field(True, description="Item status")


class ItemCreate(ItemBase):
    """Schema for creating a new Item."""

    pass


class ItemUpdate(BaseModel):
    """Schema for updating an existing Item."""

    title: Optional[str] = Field(None, min_length=1, max_length=100, description="Item title")
    description: Optional[str] = Field(None, description="Optional item description")
    is_active: Optional[bool] = Field(None, description="Item status")


class ItemInDBBase(ItemBase):
    """Base schema for Item as stored in DB with ID and timestamps."""

    id: int
    created_at: datetime
    updated_at: Optional[datetime] = None

    class Config:
        from_attributes = True


class Item(ItemInDBBase):
    """Schema for returning an Item."""

    pass