"""
Item Pydantic 模型
"""
from pydantic import BaseModel, Field
from datetime import datetime
from typing import Optional
from decimal import Decimal

class ItemBase(BaseModel):
    """Item 基础模型"""
    name: str = Field(..., min_length=1, max_length=100, description="物品名称")
    description: Optional[str] = Field(None, description="物品描述")
    price: Decimal = Field(0.00, ge=0, description="物品价格")

class ItemCreate(ItemBase):
    """创建 Item 模型"""
    pass

class ItemUpdate(BaseModel):
    """更新 Item 模型"""
    name: Optional[str] = Field(None, min_length=1, max_length=100, description="物品名称")
    description: Optional[str] = Field(None, description="物品描述")
    price: Optional[Decimal] = Field(None, ge=0, description="物品价格")

class ItemInDB(ItemBase):
    """数据库中的 Item 模型"""
    id: int
    is_active: bool
    created_at: datetime
    updated_at: datetime
    
    class Config:
        from_attributes = True

class ItemResponse(ItemInDB):
    """Item 响应模型"""
    pass