from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session
from typing import List

from .. import models, schemas, database

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

@router.post("/", response_model=schemas.ItemRead, status_code=status.HTTP_201_CREATED)
def create_item(item: schemas.ItemCreate, db: Session = Depends(database.get_db)):
    db_item = models.Item(**item.dict())
    db.add(db_item)
    db.commit()
    db.refresh(db_item)
    return db_item

@router.get("/", response_model=List[schemas.ItemRead])
def read_items(skip: int = 0, limit: int = 100, db: Session = Depends(database.get_db)):
    items = db.query(models.Item).offset(skip).limit(limit).all()
    return items

@router.get("/{item_id}", response_model=schemas.ItemRead)
def read_item(item_id: int, db: Session = Depends(database.get_db)):
    item = db.query(models.Item).filter(models.Item.id == item_id).first()
    if not item:
        raise HTTPException(status_code=404, detail="Item not found")
    return item

@router.put("/{item_id}", response_model=schemas.ItemRead)
def update_item(item_id: int, item_update: schemas.ItemUpdate, db: Session = Depends(database.get_db)):
    item = db.query(models.Item).filter(models.Item.id == item_id).first()
    if not item:
        raise HTTPException(status_code=404, detail="Item not found")
    update_data = item_update.dict(exclude_unset=True)
    for key, value in update_data.items():
        setattr(item, key, value)
    db.commit()
    db.refresh(item)
    return item

@router.delete("/{item_id}", status_code=status.HTTP_204_NO_CONTENT)
def delete_item(item_id: int, db: Session = Depends(database.get_db)):
    item = db.query(models.Item).filter(models.Item.id == item_id).first()
    if not item:
        raise HTTPException(status_code=404, detail="Item not found")
    db.delete(item)
    db.commit()
    return