/*
    *    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 static org.assertj.core.api.Assertions.assertThat;
  
  import java.math.BigDecimal;
  import java.util.Iterator;
  
  import org.junit.jupiter.api.Test;
  
  class CartTest {
  
    @Test
    void addItemWhenIsInStockIsTrue() {
      // given
      Cart cart = new Cart();
      Item item = new Item();
      item.setItemId("I01");
      item.setListPrice(new BigDecimal("2.05"));
  
      // when
      cart.addItem(item, true);
      cart.addItem(item, true);
  
      // then
      assertThat(cart.getCartItemList().get(0).getItem()).isSameAs(item);
      assertThat(cart.getCartItemList().get(0).isInStock()).isTrue();
      assertThat(cart.getCartItemList().get(0).getQuantity()).isEqualTo(2);
      assertThat(cart.getCartItemList().get(0).getTotal()).isEqualTo(new BigDecimal("4.10"));
      assertThat(cart.containsItemId("I01")).isTrue();
      assertThat(cart.getNumberOfItems()).isEqualTo(1);
      {
        Iterator<CartItem> cartItems = cart.getCartItems();
        assertThat(cartItems.next()).isNotNull();
        assertThat(cartItems.hasNext()).isFalse();
      }
      {
        Iterator<CartItem> cartItems = cart.getAllCartItems();
        assertThat(cartItems.next()).isNotNull();
        assertThat(cartItems.hasNext()).isFalse();
      }
    }
  
    @Test
    void addItemWhenIsInStockIsFalse() {
      // given
      Cart cart = new Cart();
      Item item = new Item();
      item.setItemId("I01");
      item.setListPrice(new BigDecimal("2.05"));
  
      // when
      cart.addItem(item, false);
  
      // then
      assertThat(cart.getCartItemList().get(0).getItem()).isSameAs(item);
      assertThat(cart.getCartItemList().get(0).isInStock()).isFalse();
      assertThat(cart.getCartItemList().get(0).getQuantity()).isEqualTo(1);
      assertThat(cart.getCartItemList().get(0).getTotal()).isEqualTo(new BigDecimal("2.05"));
    }
  
    @Test
    void removeItemByIdWhenItemNotFound() {
      // given
      Cart cart = new Cart();
  
      // when
      Item item = cart.removeItemById("I01");
  
      // then
      assertThat(item).isNull();
      assertThat(cart.containsItemId("I01")).isFalse();
      assertThat(cart.getNumberOfItems()).isEqualTo(0);
      assertThat(cart.getCartItems().hasNext()).isFalse();
      assertThat(cart.getAllCartItems().hasNext()).isFalse();
    }
  
    @Test
    void removeItemByIdWhenItemFound() {
      // given
      Cart cart = new Cart();
      Item item = new Item();
      item.setItemId("I01");
      item.setListPrice(new BigDecimal("2.05"));
      cart.addItem(item, true);
 
     // when
     Item removedItem = cart.removeItemById("I01");
 
     // then
     assertThat(removedItem).isSameAs(item);
     assertThat(cart.getCartItemList()).isEmpty();
   }
 
   @Test
   void incrementQuantityByItemId() {
     // given
     Cart cart = new Cart();
     Item item = new Item();
     item.setItemId("I01");
     item.setListPrice(new BigDecimal("2.05"));
     cart.addItem(item, true);
 
     // when
     cart.incrementQuantityByItemId("I01");
     cart.incrementQuantityByItemId("I01");
 
     // then
     assertThat(cart.getCartItemList().get(0).getItem()).isSameAs(item);
     assertThat(cart.getCartItemList().get(0).isInStock()).isTrue();
     assertThat(cart.getCartItemList().get(0).getQuantity()).isEqualTo(3);
     assertThat(cart.getCartItemList().get(0).getTotal()).isEqualTo(new BigDecimal("6.15"));
   }
 
   @Test
   void setQuantityByItemId() {
     // given
     Cart cart = new Cart();
     Item item = new Item();
     item.setItemId("I01");
     item.setListPrice(new BigDecimal("2.05"));
     cart.addItem(item, true);
 
     // when
     cart.setQuantityByItemId("I01", 10);
 
     // then
     assertThat(cart.getCartItemList().get(0).getItem()).isSameAs(item);
     assertThat(cart.getCartItemList().get(0).isInStock()).isTrue();
     assertThat(cart.getCartItemList().get(0).getQuantity()).isEqualTo(10);
     assertThat(cart.getCartItemList().get(0).getTotal()).isEqualTo(new BigDecimal("20.50"));
   }
 
   @Test
   void getSubTotalWhenItemIsEmpty() {
     // given
     Cart cart = new Cart();
 
     // when
     BigDecimal subTotal = cart.getSubTotal();
 
     // then
     assertThat(subTotal).isEqualTo(BigDecimal.ZERO);
 
   }
 
   @Test
   void getSubTotalWhenItemIsExist() {
     // given
     Cart cart = new Cart();
     {
       Item item = new Item();
       item.setItemId("I01");
       item.setListPrice(new BigDecimal("2.05"));
       cart.addItem(item, true);
       cart.setQuantityByItemId("I01", 5);
     }
     {
       Item item = new Item();
       item.setItemId("I02");
       item.setListPrice(new BigDecimal("3.06"));
       cart.addItem(item, true);
       cart.setQuantityByItemId("I02", 6);
     }
 
     // when
     BigDecimal subTotal = cart.getSubTotal();
 
     // then
     assertThat(subTotal).isEqualTo(new BigDecimal("28.61"));
   }
 
 }