from .model import Cart


def add_to_cart(user_id: int, item_id: int):
    if Cart.select().where(Cart.user_id==user_id, Cart.product_id==item_id).exists():
        count = Cart.get(Cart.user_id==user_id, Cart.product_id==item_id).count
        Cart.update(count=count+1).where(Cart.user_id==user_id, Cart.product_id==item_id).execute()
        return
    Cart.insert(user_id=user_id, product_id=item_id, count=1).execute()


def del_from_cart(user_id: int, item_id: int):
    Cart.delete().where(Cart.user_id == user_id, Cart.product_id == item_id).execute()


def clean_cart(user_id: int):
    Cart.delete().where(Cart.user_id == user_id).execute()


def get_user_cart(user_id: int):
    cart = []
    for i in Cart.select().where(Cart.user_id == user_id):
        cart.append((i.product_id, i.count))
    return cart