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

from app.database import get_db
from app.schemas.item import Item, ItemCreate
import app.crud as crud

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

# CREATE operation
@router.post("/", response_model=Item, status_code=status.HTTP_201_CREATED)
def create_item(item: ItemCreate, db: Session = Depends(get_db)):
    """Create a new item"""
    return crud.create_item(db=db, item=item)

from fastapi import Header
@router.get("/", response_model=List[Item])
def read_items(skip: int = 0, limit: int = 100, db: Session = Depends(get_db), api_key: str = Header(..., alias="api_key")):
    """Get all items with pagination"""
    return crud.get_items(db=db, skip=skip, limit=limit, api_key=api_key)

@router.get("/{item_id}", response_model=Item)
def read_item(item_id: int, db: Session = Depends(get_db)):
    """Get a specific item by ID"""
    db_item = crud.get_item(db=db, item_id=item_id)
    if db_item is None:
        raise HTTPException(status_code=404, detail="Item not found")
    return db_item

# UPDATE operation
@router.put("/{item_id}", response_model=Item)
def update_item(item_id: int, item: ItemCreate, db: Session = Depends(get_db)):
    """Update an existing item"""
    db_item = crud.update_item(db=db, item_id=item_id, item=item)
    if db_item is None:
        raise HTTPException(status_code=404, detail="Item not found")
    return db_item

# DELETE operation
@router.delete("/{item_id}", status_code=status.HTTP_204_NO_CONTENT)
def delete_item(item_id: int, db: Session = Depends(get_db)):
    """Delete a specific item"""
    success = crud.delete_item(db=db, item_id=item_id)
    if not success:
        raise HTTPException(status_code=404, detail="Item not found")
    return None