from typing import Any, List, Optional

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

from app.api.v1.deps import get_current_active_superuser
from app.core.deps import get_db
from app.crud.product import product as product_crud
from app.models.user import User
from app.schemas.product import Product, ProductCreate, ProductUpdate

router = APIRouter()


@router.get("/", response_model=List[Product])
def read_products(
    db: Session = Depends(get_db),
    skip: int = 0,
    limit: int = 100,
    search: Optional[str] = None,
) -> Any:
    """
    Retrieve products.

    If search query is provided, returns products matching the search query.
    Otherwise, returns all products with pagination.
    """
    if search:
        products = product_crud.search_products(
            db, query=search, skip=skip, limit=limit
        )
    else:
        products = product_crud.get_multi(db, skip=skip, limit=limit)
    return products


@router.post("/", response_model=Product)
def create_product(
    *,
    db: Session = Depends(get_db),
    product_in: ProductCreate,
    current_user: User = Depends(get_current_active_superuser),
) -> Any:
    """
    Create new product.

    Only superusers can create products.
    """
    product = product_crud.get_product_by_name(db, name=product_in.name)
    if product:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="A product with this name already exists",
        )
    product = product_crud.create(db, obj_in=product_in)
    return product


@router.get("/{id}", response_model=Product)
def read_product(
    *,
    db: Session = Depends(get_db),
    id: int,
) -> Any:
    """
    Get product by ID.
    """
    product = product_crud.get(db, id=id)
    if not product:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Product not found",
        )
    return product


@router.put("/{id}", response_model=Product)
def update_product(
    *,
    db: Session = Depends(get_db),
    id: int,
    product_in: ProductUpdate,
    current_user: User = Depends(get_current_active_superuser),
) -> Any:
    """
    Update a product.

    Only superusers can update products.
    """
    product = product_crud.get(db, id=id)
    if not product:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Product not found",
        )
    product = product_crud.update(db, db_obj=product, obj_in=product_in)
    return product


@router.delete("/{id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None)
def delete_product(
    *,
    db: Session = Depends(get_db),
    id: int,
    current_user: User = Depends(get_current_active_superuser),
) -> Any:
    """
    Delete a product.

    Only superusers can delete products.
    """
    product = product_crud.get(db, id=id)
    if not product:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Product not found",
        )
    product_crud.remove(db, id=id)
    return None