/*
    *    Copyright 2009-2021 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
    *
    *       http://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.apache.ibatis.submitted.lazy_properties;
  
  import static org.junit.jupiter.api.Assertions.*;
  
  import java.io.Reader;
  import java.util.Collections;
  import java.util.HashSet;
  
  import org.apache.ibatis.BaseDataTest;
  import org.apache.ibatis.executor.loader.ProxyFactory;
  import org.apache.ibatis.executor.loader.cglib.CglibProxyFactory;
  import org.apache.ibatis.executor.loader.javassist.JavassistProxyFactory;
  import org.apache.ibatis.io.Resources;
  import org.apache.ibatis.session.Configuration;
  import org.apache.ibatis.session.SqlSession;
  import org.apache.ibatis.session.SqlSessionFactory;
  import org.apache.ibatis.session.SqlSessionFactoryBuilder;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Tag;
  import org.junit.jupiter.api.Test;
  
  class LazyPropertiesTest {
  
    private static SqlSessionFactory sqlSessionFactory;
  
    @BeforeEach
    void setUp() throws Exception {
      // create an SqlSessionFactory
      try (Reader reader = Resources
          .getResourceAsReader("org/apache/ibatis/submitted/lazy_properties/mybatis-config.xml")) {
        sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
      }
  
      // populate in-memory database
      BaseDataTest.runScript(sqlSessionFactory.getConfiguration().getEnvironment().getDataSource(),
          "org/apache/ibatis/submitted/lazy_properties/CreateDB.sql");
    }
  
    @Test
    void shouldLoadOnlyTheInvokedLazyProperty() {
      sqlSessionFactory.getConfiguration().setAggressiveLazyLoading(false);
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        Mapper mapper = sqlSession.getMapper(Mapper.class);
        User user = mapper.getUser(1);
        assertEquals(0, user.setterCounter);
        assertNotNull(user.getLazy1());
        assertEquals(1, user.setterCounter, "Should NOT load other lazy properties.");
      }
    }
  
    @Test
    void verifyAggressiveLazyLoadingBehavior() {
      sqlSessionFactory.getConfiguration().setAggressiveLazyLoading(true);
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        Mapper mapper = sqlSession.getMapper(Mapper.class);
        User user = mapper.getUser(1);
        // Setter invocation by MyBatis triggers aggressive lazy-loading.
        assertEquals(3, user.setterCounter, "Should load all lazy properties.");
      }
    }
  
    @Test
    void shouldToStringTriggerLazyLoading() {
      sqlSessionFactory.getConfiguration().setAggressiveLazyLoading(false);
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        Mapper mapper = sqlSession.getMapper(Mapper.class);
        User user = mapper.getUser(1);
        user.toString();
        assertEquals(3, user.setterCounter);
      }
    }
  
    @Test
    void shouldHashCodeTriggerLazyLoading() {
      sqlSessionFactory.getConfiguration().setAggressiveLazyLoading(false);
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        Mapper mapper = sqlSession.getMapper(Mapper.class);
        User user = mapper.getUser(1);
        user.hashCode();
        assertEquals(3, user.setterCounter);
      }
    }
  
    @Test
   void shouldEqualsTriggerLazyLoading() {
     sqlSessionFactory.getConfiguration().setAggressiveLazyLoading(false);
     try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
       Mapper mapper = sqlSession.getMapper(Mapper.class);
       User user = mapper.getUser(1);
       user.equals(null);
       assertEquals(3, user.setterCounter);
     }
   }
 
   @Test
   void shouldCloneTriggerLazyLoading() {
     sqlSessionFactory.getConfiguration().setAggressiveLazyLoading(false);
     try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
       Mapper mapper = sqlSession.getMapper(Mapper.class);
       User user = mapper.getUser(1);
       user.clone();
       assertEquals(3, user.setterCounter);
     }
   }
 
   @Test
   void verifyEmptyLazyLoadTriggerMethods() {
     Configuration configuration = sqlSessionFactory.getConfiguration();
     configuration.setAggressiveLazyLoading(false);
     configuration.setLazyLoadTriggerMethods(new HashSet<>());
     try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
       Mapper mapper = sqlSession.getMapper(Mapper.class);
       User user = mapper.getUser(1);
       user.toString();
       user.hashCode();
       user.equals(null);
       user.clone();
       assertEquals(0, user.setterCounter);
     }
   }
 
   @Test
   void verifyCustomLazyLoadTriggerMethods() {
     Configuration configuration = sqlSessionFactory.getConfiguration();
     configuration.setAggressiveLazyLoading(false);
     configuration.setLazyLoadTriggerMethods(new HashSet<>(Collections.singleton("trigger")));
     try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
       Mapper mapper = sqlSession.getMapper(Mapper.class);
       User user = mapper.getUser(1);
       user.toString();
       user.hashCode();
       user.equals(null);
       user.clone();
       assertEquals(0, user.setterCounter);
       user.trigger();
       assertEquals(3, user.setterCounter);
     }
   }
 
   @Test
   void shouldInvokingSetterInvalidateLazyLoading_Javassist() {
     shoulInvokingSetterInvalidateLazyLoading(new JavassistProxyFactory());
   }
 
   @Tag("RequireIllegalAccess")
   @Test
   void shouldInvokingSetterInvalidateLazyLoading_Cglib() {
     shoulInvokingSetterInvalidateLazyLoading(new CglibProxyFactory());
   }
 
   private void shoulInvokingSetterInvalidateLazyLoading(ProxyFactory proxyFactory) {
     Configuration config = sqlSessionFactory.getConfiguration();
     config.setProxyFactory(proxyFactory);
     config.setAggressiveLazyLoading(false);
     try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
       Mapper mapper = sqlSession.getMapper(Mapper.class);
       User user = mapper.getUser(1);
       User u2 = new User();
       u2.setId(99);
       user.setLazy1(u2);
       assertEquals(1, user.setterCounter);
       assertEquals(Integer.valueOf(99), user.getLazy1().getId());
       assertEquals(1, user.setterCounter);
     }
   }
 }