/*
    *    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.cursor_nested;
  
  import java.io.Reader;
  import java.util.Iterator;
  
  import org.apache.ibatis.BaseDataTest;
  import org.apache.ibatis.cursor.Cursor;
  import org.apache.ibatis.io.Resources;
  import org.apache.ibatis.session.RowBounds;
  import org.apache.ibatis.session.SqlSession;
  import org.apache.ibatis.session.SqlSessionFactory;
  import org.apache.ibatis.session.SqlSessionFactoryBuilder;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.BeforeAll;
  import org.junit.jupiter.api.Test;
  
  class CursorNestedTest {
  
    private static SqlSessionFactory sqlSessionFactory;
  
    @BeforeAll
    static void setUp() throws Exception {
      // create a SqlSessionFactory
      try (Reader reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/cursor_nested/mybatis-config.xml")) {
        sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
      }
  
      // populate in-memory database
      BaseDataTest.runScript(sqlSessionFactory.getConfiguration().getEnvironment().getDataSource(),
          "org/apache/ibatis/submitted/cursor_nested/CreateDB.sql");
    }
  
    @Test
    void shouldGetAllUser() {
      Cursor<User> usersCursor;
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        Mapper mapper = sqlSession.getMapper(Mapper.class);
        usersCursor = mapper.getAllUsers();
  
        Assertions.assertFalse(usersCursor.isOpen());
        // Retrieving iterator, fetching is not started
        Iterator<User> iterator = usersCursor.iterator();
  
        // Check if hasNext, fetching is started
        Assertions.assertTrue(iterator.hasNext());
        Assertions.assertTrue(usersCursor.isOpen());
        Assertions.assertFalse(usersCursor.isConsumed());
  
        User user = iterator.next();
        Assertions.assertEquals(2, user.getGroups().size());
        Assertions.assertEquals(3, user.getRoles().size());
  
        user = iterator.next();
        Assertions.assertEquals(1, user.getGroups().size());
        Assertions.assertEquals(3, user.getRoles().size());
  
        user = iterator.next();
        Assertions.assertEquals(3, user.getGroups().size());
        Assertions.assertEquals(1, user.getRoles().size());
  
        user = iterator.next();
        Assertions.assertEquals(2, user.getGroups().size());
        Assertions.assertEquals(2, user.getRoles().size());
  
        Assertions.assertTrue(usersCursor.isOpen());
        Assertions.assertFalse(usersCursor.isConsumed());
  
        // Check no more elements
        Assertions.assertFalse(iterator.hasNext());
        Assertions.assertFalse(usersCursor.isOpen());
        Assertions.assertTrue(usersCursor.isConsumed());
      }
      Assertions.assertFalse(usersCursor.isOpen());
    }
  
    @Test
    void testCursorWithRowBound() {
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        Cursor<User> usersCursor = sqlSession.selectCursor("getAllUsers", null, new RowBounds(2, 1));
  
        Iterator<User> iterator = usersCursor.iterator();
  
        Assertions.assertTrue(iterator.hasNext());
        User user = iterator.next();
       Assertions.assertEquals("User3", user.getName());
       Assertions.assertEquals(2, usersCursor.getCurrentIndex());
 
       Assertions.assertFalse(iterator.hasNext());
       Assertions.assertFalse(usersCursor.isOpen());
       Assertions.assertTrue(usersCursor.isConsumed());
     }
   }
 }