from typing import Any, List

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

from app import crud, schemas
from app.db.session import get_db

router = APIRouter()


@router.get("/items/", response_model=List[schemas.Item])
def read_items(
    db: Session = Depends(get_db),
    skip: int = 0,
    limit: int = 100,
    active_only: bool = False,
) -> Any:
    """
    Retrieve items.
    
    Args:
        skip: Number of items to skip
        limit: Maximum number of items to return
        active_only: If True, only return active items
    
    Returns:
        List of items
    """
    if active_only:
        items = crud.item.get_multi_active(db, skip=skip, limit=limit)
    else:
        items = crud.item.get_multi(db, skip=skip, limit=limit)
    return items


@router.post("/items/", response_model=schemas.Item, status_code=status.HTTP_201_CREATED)
def create_item(
    *,
    db: Session = Depends(get_db),
    item_in: schemas.ItemCreate,
) -> Any:
    """
    Create new item.
    
    Args:
        item_in: Item data
    
    Returns:
        Created item
    """
    item = crud.item.get_by_title(db, title=item_in.title)
    if item:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="An item with this title already exists.",
        )
    item = crud.item.create(db, obj_in=item_in)
    return item


@router.get("/items/{item_id}", response_model=schemas.Item)
def read_item(
    *,
    db: Session = Depends(get_db),
    item_id: int,
) -> Any:
    """
    Get item by ID.
    
    Args:
        item_id: ID of item to get
    
    Returns:
        Item information
    """
    item = crud.item.get(db=db, id=item_id)
    if not item:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Item not found",
        )
    return item


@router.put("/items/{item_id}", response_model=schemas.Item)
def update_item(
    *,
    db: Session = Depends(get_db),
    item_id: int,
    item_in: schemas.ItemUpdate,
) -> Any:
    """
    Update an item.
    
    Args:
        item_id: ID of item to update
        item_in: New item data
    
    Returns:
        Updated item
    """
    item = crud.item.get(db=db, id=item_id)
    if not item:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Item not found",
        )
    item = crud.item.update(db=db, db_obj=item, obj_in=item_in)
    return item


@router.delete("/items/{item_id}", response_model=schemas.Item)
def delete_item(
    *,
    db: Session = Depends(get_db),
    item_id: int,
) -> Any:
    """
    Delete an item.
    
    Args:
        item_id: ID of item to delete
    
    Returns:
        Deleted item
    """
    item = crud.item.get(db=db, id=item_id)
    if not item:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Item not found",
        )
    item = crud.item.remove(db=db, id=item_id)
    return item