from typing import Any, List
from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy.orm import Session
from app.core.auth import get_current_active_user
from app.crud import item as item_crud
from app.db.session import get_db
from app.models import User
from app.schemas.item import Item, ItemCreate, ItemUpdate, ItemWithLowStock

router = APIRouter()


@router.get("/", response_model=List[Item])
def read_items(
    db: Session = Depends(get_db),
    skip: int = 0,
    limit: int = 100,
    current_user: User = Depends(get_current_active_user),
) -> Any:
    items = item_crud.get_multi(db, skip=skip, limit=limit)
    return items


@router.get("/search", response_model=List[Item])
def search_items(
    query: str = Query(..., description="Search query"),
    db: Session = Depends(get_db),
    skip: int = 0,
    limit: int = 100,
    current_user: User = Depends(get_current_active_user),
) -> Any:
    items = item_crud.search_items(db, query=query, skip=skip, limit=limit)
    return items


@router.get("/low-stock", response_model=List[ItemWithLowStock])
def read_low_stock_items(
    db: Session = Depends(get_db),
    skip: int = 0,
    limit: int = 100,
    current_user: User = Depends(get_current_active_user),
) -> Any:
    items = item_crud.get_low_stock_items(db, skip=skip, limit=limit)
    return items


@router.get("/active", response_model=List[Item])
def read_active_items(
    db: Session = Depends(get_db),
    skip: int = 0,
    limit: int = 100,
    current_user: User = Depends(get_current_active_user),
) -> Any:
    items = item_crud.get_active_items(db, skip=skip, limit=limit)
    return items


@router.post("/", response_model=Item)
def create_item(
    *,
    db: Session = Depends(get_db),
    item_in: ItemCreate,
    current_user: User = Depends(get_current_active_user),
) -> Any:
    item = item_crud.get_by_sku(db, sku=item_in.sku)
    if item:
        raise HTTPException(
            status_code=400,
            detail="Item with this SKU already exists.",
        )
    if item_in.barcode:
        item = item_crud.get_by_barcode(db, barcode=item_in.barcode)
        if item:
            raise HTTPException(
                status_code=400,
                detail="Item with this barcode already exists.",
            )
    item = item_crud.create(db, obj_in=item_in)
    return item


@router.put("/{id}", response_model=Item)
def update_item(
    *,
    db: Session = Depends(get_db),
    id: int,
    item_in: ItemUpdate,
    current_user: User = Depends(get_current_active_user),
) -> Any:
    item = item_crud.get(db, id=id)
    if not item:
        raise HTTPException(status_code=404, detail="Item not found")
    item = item_crud.update(db, db_obj=item, obj_in=item_in)
    return item


@router.get("/{id}", response_model=Item)
def read_item(
    *,
    db: Session = Depends(get_db),
    id: int,
    current_user: User = Depends(get_current_active_user),
) -> Any:
    item = item_crud.get(db, id=id)
    if not item:
        raise HTTPException(status_code=404, detail="Item not found")
    return item


@router.delete("/{id}", response_model=Item)
def delete_item(
    *,
    db: Session = Depends(get_db),
    id: int,
    current_user: User = Depends(get_current_active_user),
) -> Any:
    item = item_crud.get(db, id=id)
    if not item:
        raise HTTPException(status_code=404, detail="Item not found")
    item = item_crud.remove(db, id=id)
    return item