"""
Item 路由
"""
from typing import List
from fastapi import APIRouter, Depends, HTTPException, status
from tortoise.exceptions import DoesNotExist
from app.models.item import Item
from app.schemas.item import ItemCreate, ItemUpdate, ItemResponse
from app.api.dependencies import get_db

router = APIRouter()

@router.get("/", response_model=List[ItemResponse], summary="获取物品列表")
async def read_items(
    skip: int = 0,
    limit: int = 100,
    db=Depends(get_db)
):
    """获取物品列表"""
    items = await Item.all().offset(skip).limit(limit)
    return items

@router.get("/{item_id}", response_model=ItemResponse, summary="获取物品详情")
async def read_item(item_id: int, db=Depends(get_db)):
    """根据ID获取物品"""
    try:
        item = await Item.get(id=item_id)
        return item
    except DoesNotExist:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"物品 ID {item_id} 不存在"
        )

@router.post("/", response_model=ItemResponse, status_code=status.HTTP_201_CREATED, summary="创建物品")
async def create_item(item: ItemCreate, db=Depends(get_db)):
    """创建新物品"""
    # 检查名称是否已存在
    existing_item = await Item.filter(name=item.name).first()
    if existing_item:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=f"物品名称 '{item.name}' 已存在"
        )
    
    # 创建物品
    item_dict = item.model_dump()
    new_item = await Item.create(**item_dict)
    return new_item

@router.put("/{item_id}", response_model=ItemResponse, summary="更新物品")
async def update_item(item_id: int, item_update: ItemUpdate, db=Depends(get_db)):
    """更新物品信息"""
    try:
        item = await Item.get(id=item_id)
        
        # 更新字段
        update_data = item_update.model_dump(exclude_unset=True)
        
        # 如果更新名称，检查是否与其他物品重名
        if "name" in update_data:
            existing_item = await Item.filter(
                name=update_data["name"]
            ).exclude(id=item_id).first()
            if existing_item:
                raise HTTPException(
                    status_code=status.HTTP_400_BAD_REQUEST,
                    detail=f"物品名称 '{update_data['name']}' 已存在"
                )
        
        # 应用更新
        await item.update_from_dict(update_data)
        await item.save()
        
        return item
    except DoesNotExist:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"物品 ID {item_id} 不存在"
        )

@router.delete("/{item_id}", status_code=status.HTTP_204_NO_CONTENT, summary="删除物品")
async def delete_item(item_id: int, db=Depends(get_db)):
    """删除物品"""
    try:
        item = await Item.get(id=item_id)
        await item.delete()
        return None
    except DoesNotExist:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"物品 ID {item_id} 不存在"
        )