/*
    *    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.force_flush_on_select;
  
  import static org.junit.jupiter.api.Assertions.*;
  
  import java.io.Reader;
  import java.sql.Connection;
  import java.sql.SQLException;
  import java.sql.Statement;
  import java.util.List;
  
  import org.apache.ibatis.BaseDataTest;
  import org.apache.ibatis.io.Resources;
  import org.apache.ibatis.session.ExecutorType;
  import org.apache.ibatis.session.LocalCacheScope;
  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.Test;
  
  class ForceFlushOnSelectTest {
  
    private static SqlSessionFactory sqlSessionFactory;
  
    @BeforeEach
    void initDatabase() throws Exception {
      try (Reader reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/force_flush_on_select/ibatisConfig.xml")) {
        sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
      }
  
      BaseDataTest.runScript(sqlSessionFactory.getConfiguration().getEnvironment().getDataSource(),
              "org/apache/ibatis/submitted/force_flush_on_select/CreateDB.sql");
    }
  
    @Test
    void testShouldFlushLocalSessionCacheOnQuery() throws SQLException {
      try (SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.SIMPLE)) {
        PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
        personMapper.selectByIdFlush(1);
        updateDatabase(sqlSession.getConnection());
        Person updatedPerson = personMapper.selectByIdFlush(1);
        assertEquals("Simone", updatedPerson.getFirstName());
        sqlSession.commit();
      }
    }
  
    @Test
    void testShouldNotFlushLocalSessionCacheOnQuery() throws SQLException {
      try (SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.SIMPLE)) {
        PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
        personMapper.selectByIdNoFlush(1);
        updateDatabase(sqlSession.getConnection());
        Person updatedPerson = personMapper.selectByIdNoFlush(1);
        assertEquals("John", updatedPerson.getFirstName());
        sqlSession.commit();
      }
    }
  
    @Test
    void testShouldFlushLocalSessionCacheOnQueryForList() throws SQLException {
      try (SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.SIMPLE)) {
        PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
        List<Person> people = personMapper.selectAllFlush();
        updateDatabase(sqlSession.getConnection());
        people = personMapper.selectAllFlush();
        assertEquals("Simone", people.get(0).getFirstName());
        sqlSession.commit();
      }
    }
  
    @Test
    void testShouldNotFlushLocalSessionCacheOnQueryForList() throws SQLException {
      try (SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.SIMPLE)) {
        PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
        List<Person> people = personMapper.selectAllNoFlush();
        updateDatabase(sqlSession.getConnection());
        people = personMapper.selectAllNoFlush();
        assertEquals("John", people.get(0).getFirstName());
        sqlSession.commit();
      }
    }
  
    private void updateDatabase(Connection conn) throws SQLException {
      try (Statement stmt = conn.createStatement()) {
       stmt.executeUpdate("UPDATE person SET firstName = 'Simone' WHERE id = 1");
     }
   }
 
   @Test
   void testUpdateShouldFlushLocalCache() {
     try (SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.SIMPLE)) {
       PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
       Person person = personMapper.selectByIdNoFlush(1);
       person.setLastName("Perez"); // it is ignored in update
       personMapper.update(person);
       Person updatedPerson = personMapper.selectByIdNoFlush(1);
       assertEquals("Smith", updatedPerson.getLastName());
       assertNotSame(person, updatedPerson);
       sqlSession.commit();
     }
   }
 
   @Test
   void testSelectShouldFlushLocalCacheIfFlushLocalCacheAtferEachStatementIsTrue() throws SQLException {
     sqlSessionFactory.getConfiguration().setLocalCacheScope(LocalCacheScope.STATEMENT);
     try (SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.SIMPLE)) {
       PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
       List<Person> people = personMapper.selectAllNoFlush();
       updateDatabase(sqlSession.getConnection());
       people = personMapper.selectAllFlush();
       assertEquals("Simone", people.get(0).getFirstName());
       sqlSession.commit();
     }
   }
 
 }