from typing import Any, List

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

from app import crud, models, schemas
from app.api import deps
from app.models.stock_movement import MovementType

router = APIRouter()


@router.get("/", response_model=List[schemas.StockMovement])
def read_stock_movements(
    db: Session = Depends(deps.get_db),
    skip: int = 0,
    limit: int = 100,
    current_user: models.User = Depends(deps.get_current_active_user),
) -> Any:
    """
    Retrieve stock movements.
    """
    stock_movements = crud.stock_movement.get_multi(db, skip=skip, limit=limit)
    return stock_movements


@router.post("/", response_model=schemas.StockMovement)
def create_stock_movement(
    *,
    db: Session = Depends(deps.get_db),
    stock_movement_in: schemas.StockMovementCreate,
    current_user: models.User = Depends(deps.get_current_active_user),
) -> Any:
    """
    Create new stock movement and update product stock levels.
    """
    # Check if product exists
    product = crud.product.get(db, id=stock_movement_in.product_id)
    if not product:
        raise HTTPException(status_code=404, detail="Product not found")
    
    # For outgoing stock, make sure we have enough
    if stock_movement_in.movement_type in [MovementType.SALE, MovementType.ADJUSTMENT] and stock_movement_in.quantity > 0:
        if product.current_stock < stock_movement_in.quantity:
            raise HTTPException(
                status_code=400,
                detail=f"Not enough stock available. Current stock: {product.current_stock}",
            )
    
    # Create stock movement and update product stock level
    stock_movement = crud.stock_movement.create_with_product_update(
        db, obj_in=stock_movement_in, created_by=current_user.id
    )
    return stock_movement


@router.get("/{stock_movement_id}", response_model=schemas.StockMovement)
def read_stock_movement(
    *,
    db: Session = Depends(deps.get_db),
    stock_movement_id: str,
    current_user: models.User = Depends(deps.get_current_active_user),
) -> Any:
    """
    Get stock movement by ID.
    """
    stock_movement = crud.stock_movement.get(db, id=stock_movement_id)
    if not stock_movement:
        raise HTTPException(status_code=404, detail="Stock movement not found")
    return stock_movement


@router.get("/by-product/{product_id}", response_model=List[schemas.StockMovement])
def read_stock_movements_by_product(
    *,
    db: Session = Depends(deps.get_db),
    product_id: str,
    skip: int = 0,
    limit: int = 100,
    current_user: models.User = Depends(deps.get_current_active_user),
) -> Any:
    """
    Get stock movements by product.
    """
    stock_movements = crud.stock_movement.get_by_product(
        db, product_id=product_id, skip=skip, limit=limit
    )
    return stock_movements


@router.get("/by-type/{movement_type}", response_model=List[schemas.StockMovement])
def read_stock_movements_by_type(
    *,
    db: Session = Depends(deps.get_db),
    movement_type: MovementType,
    skip: int = 0,
    limit: int = 100,
    current_user: models.User = Depends(deps.get_current_active_user),
) -> Any:
    """
    Get stock movements by movement type.
    """
    stock_movements = crud.stock_movement.get_by_movement_type(
        db, movement_type=movement_type, skip=skip, limit=limit
    )
    return stock_movements