/*
    *    Copyright 2010-2022 the original author or authors.
    *
    *    Licensed under the Apache License, Version 2.0 (the "License");
    *    you may not use this file except in compliance with the License.
    *    You may obtain a copy of the License at
    *
    *       https://www.apache.org/licenses/LICENSE-2.0
    *
   *    Unless required by applicable law or agreed to in writing, software
   *    distributed under the License is distributed on an "AS IS" BASIS,
   *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *    See the License for the specific language governing permissions and
   *    limitations under the License.
   */
  package org.mybatis.jpetstore.domain;
  
  import java.io.Serializable;
  import java.math.BigDecimal;
  import java.util.Optional;
  
  /**
   * The Class CartItem.
   *
   * @author Eduardo Macarron
   */
  public class CartItem implements Serializable {
  
    private static final long serialVersionUID = 6620528781626504362L;
  
    private Item item;
    private int quantity;
    private boolean inStock;
    private BigDecimal total;
  
    public boolean isInStock() {
      return inStock;
    }
  
    public void setInStock(boolean inStock) {
      this.inStock = inStock;
    }
  
    public BigDecimal getTotal() {
      return total;
    }
  
    public Item getItem() {
      return item;
    }
  
    public void setItem(Item item) {
      this.item = item;
      calculateTotal();
    }
  
    public int getQuantity() {
      return quantity;
    }
  
    public void setQuantity(int quantity) {
      this.quantity = quantity;
      calculateTotal();
    }
  
    public void incrementQuantity() {
      quantity++;
      calculateTotal();
    }
  
    private void calculateTotal() {
      total = Optional.ofNullable(item).map(Item::getListPrice).map(v -> v.multiply(new BigDecimal(quantity)))
          .orElse(null);
    }
  
  }