interface OrderItem {
  price: number;
  quantity: number;
}

export function calculateOrderDiscount(a: OrderItem[], b: string): number {
  const items = a;
  const membership = b;
  const MIN_ORDER_QUANTITY = 10;
 
  let total = 0;
  

  // Sumar el total de todos los items del pedido
  for (let index = 0; index < items.length; index++) {
    total = total + items[index].price * items[index].quantity;
  }

  // Verificar si el pedido cumple el mínimo requerido
  if (total < MIN_ORDER_QUANTITY) return -1;
  const discount = getDiscount(membership, total);
  
  return total - discount;
}

function getDiscount(membership: string, total: number){
  const GOLD_MEMBERSHIP = "gold";
  const GOLD_DISCOUNT_BIg_ORDER = 0.2 
  const GOLD_DISCOUNT_SMALL_ORDER = 0.1 

  const SILVER_MEMBERSHIP = "silver";
  const SILVER_DISCOUNT_BIg_ORDER = 0.1 
  const SILVER_DISCOUNT_SMALL_ORDER = 0.05 

  const BIG_ORDER_VOLUME = 100;

  let discount = 0;

  // Aplicar descuento según el tipo de membresía y el monto total
  if (membership === GOLD_MEMBERSHIP) {
    // Pedidos grandes reciben mayor descuento
    if (total >= BIG_ORDER_VOLUME) {
      discount = total * GOLD_DISCOUNT_BIg_ORDER;
    } else {
      discount = total * GOLD_DISCOUNT_SMALL_ORDER;
    }
  } else if (membership === SILVER_MEMBERSHIP) {
    // Pedidos grandes reciben mayor descuento
    if (total >= BIG_ORDER_VOLUME) {
      discount = total * SILVER_DISCOUNT_BIg_ORDER;
    } else {
      discount = total * SILVER_DISCOUNT_SMALL_ORDER;
    }
  }
   return discount
}