from fastapi import FastAPI, Depends, HTTPException
from sqlalchemy.orm import Session
from models import Base, engine, SessionLocal, Product, StorageLocation, Transfer
from schemas import ProductCreate, StorageLocationCreate, TransferCreate, ProductResponse, StorageLocationResponse, TransferResponse

app = FastAPI()

def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()

@app.post("/products/", response_model=ProductResponse, status_code=201)
def create_product(item: ProductCreate, db: Session = Depends(get_db)):
    db_item = Product(**item.model_dump())
    db.add(db_item)
    db.commit()
    db.refresh(db_item)
    return db_item

@app.get("/products/", response_model=list[ProductResponse])
def list_products(db: Session = Depends(get_db)):
    return db.query(Product).all()

@app.get("/products/{item_id}", response_model=ProductResponse)
def get_product(item_id: int, db: Session = Depends(get_db)):
    item = db.query(Product).filter(Product.id == item_id).first()
    if not item:
        raise HTTPException(status_code=404, detail="Product not found")
    return item

@app.put("/products/{item_id}", response_model=ProductResponse)
def update_product(item_id: int, item: ProductCreate, db: Session = Depends(get_db)):
    db_item = db.query(Product).filter(Product.id == item_id).first()
    if not db_item:
        raise HTTPException(status_code=404, detail="Product not found")
    for key, value in item.model_dump().items():
        setattr(db_item, key, value)
    db.commit()
    db.refresh(db_item)
    return db_item

@app.delete("/products/{item_id}", status_code=204)
def delete_product(item_id: int, db: Session = Depends(get_db)):
    db_item = db.query(Product).filter(Product.id == item_id).first()
    if not db_item:
        raise HTTPException(status_code=404, detail="Product not found")
    db.delete(db_item)
    db.commit()

@app.post("/storage_locations/", response_model=StorageLocationResponse, status_code=201)
def create_storagelocation(item: StorageLocationCreate, db: Session = Depends(get_db)):
    db_item = StorageLocation(**item.model_dump())
    db.add(db_item)
    db.commit()
    db.refresh(db_item)
    return db_item

@app.get("/storage_locations/", response_model=list[StorageLocationResponse])
def list_storagelocations(db: Session = Depends(get_db)):
    return db.query(StorageLocation).all()

@app.get("/storage_locations/{item_id}", response_model=StorageLocationResponse)
def get_storagelocation(item_id: int, db: Session = Depends(get_db)):
    item = db.query(StorageLocation).filter(StorageLocation.id == item_id).first()
    if not item:
        raise HTTPException(status_code=404, detail="StorageLocation not found")
    return item

@app.put("/storage_locations/{item_id}", response_model=StorageLocationResponse)
def update_storagelocation(item_id: int, item: StorageLocationCreate, db: Session = Depends(get_db)):
    db_item = db.query(StorageLocation).filter(StorageLocation.id == item_id).first()
    if not db_item:
        raise HTTPException(status_code=404, detail="StorageLocation not found")
    for key, value in item.model_dump().items():
        setattr(db_item, key, value)
    db.commit()
    db.refresh(db_item)
    return db_item

@app.delete("/storage_locations/{item_id}", status_code=204)
def delete_storagelocation(item_id: int, db: Session = Depends(get_db)):
    db_item = db.query(StorageLocation).filter(StorageLocation.id == item_id).first()
    if not db_item:
        raise HTTPException(status_code=404, detail="StorageLocation not found")
    db.delete(db_item)
    db.commit()

@app.post("/transfers/", response_model=TransferResponse, status_code=201)
def create_transfer(item: TransferCreate, db: Session = Depends(get_db)):
    db_item = Transfer(**item.model_dump())
    db.add(db_item)
    db.commit()
    db.refresh(db_item)
    return db_item

@app.get("/transfers/", response_model=list[TransferResponse])
def list_transfers(db: Session = Depends(get_db)):
    return db.query(Transfer).all()

@app.get("/transfers/{item_id}", response_model=TransferResponse)
def get_transfer(item_id: int, db: Session = Depends(get_db)):
    item = db.query(Transfer).filter(Transfer.id == item_id).first()
    if not item:
        raise HTTPException(status_code=404, detail="Transfer not found")
    return item

@app.put("/transfers/{item_id}", response_model=TransferResponse)
def update_transfer(item_id: int, item: TransferCreate, db: Session = Depends(get_db)):
    db_item = db.query(Transfer).filter(Transfer.id == item_id).first()
    if not db_item:
        raise HTTPException(status_code=404, detail="Transfer not found")
    for key, value in item.model_dump().items():
        setattr(db_item, key, value)
    db.commit()
    db.refresh(db_item)
    return db_item

@app.delete("/transfers/{item_id}", status_code=204)
def delete_transfer(item_id: int, db: Session = Depends(get_db)):
    db_item = db.query(Transfer).filter(Transfer.id == item_id).first()
    if not db_item:
        raise HTTPException(status_code=404, detail="Transfer not found")
    db.delete(db_item)
    db.commit()