from fastapi import APIRouter, Depends, HTTPException, Response
from db.session import get_db
from sqlalchemy.ext.asyncio import AsyncSession
from typing import Sequence
from sqlalchemy.exc import IntegrityError
from schemas.items import ItemOut, ItemIn
from models.items import Item
import services.items as items_service

router = APIRouter(prefix="/items", tags=["items"])


@router.get("/", response_model=list[ItemOut])
async def get_items(db: AsyncSession = Depends(get_db)) -> Sequence[Item]:
    items = await items_service.get_items(db)

    return items


@router.get("/{id}", response_model=ItemOut)
async def get_item(id: int, db: AsyncSession = Depends(get_db)) -> Item:
    item = await items_service.get_item_by_id(id, db)
    
    if item:
        return item

    raise HTTPException(404, "Item not found")


@router.post("/", response_model=ItemOut)
async def create_item(payload: ItemIn, db: AsyncSession = Depends(get_db)) -> Item:
    try:
        item = await items_service.create_item(payload, db)
        
        return item

    except IntegrityError:
        await db.rollback()
        raise HTTPException(400, f"Item with text {payload.text} is already exist...")


@router.put("/{id}", response_model=ItemOut)
async def update_item(id: int, payload: ItemIn, db: AsyncSession = Depends(get_db)) -> Item:

    item = await items_service.get_item_by_id(id, db)

    try:
        if (item):
            updated_item = await items_service.update_item(item, payload, db)

            return updated_item
        else:
            await db.rollback()
            raise HTTPException(404, "Item not found")

    except IntegrityError:
        await db.rollback()
        raise HTTPException(400, f"Item with text {payload.text} is already exist...")


@router.delete("/{id}", response_model=None)
async def delete_item(id: int, db: AsyncSession = Depends(get_db)) -> Response:
    
    item = await items_service.get_item_by_id(id, db)

    if (item):
        await items_service.delete_item(item, db)

        return Response(status_code=204, content=None)
    else:
        await db.rollback()
        raise HTTPException(404, "Item not found")