/*
    *    Copyright 2016-2026 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 examples.animal.data;
  
  import static examples.animal.data.AnimalDataDynamicSqlSupport.*;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.junit.jupiter.api.Assertions.assertAll;
  import static org.mybatis.dynamic.sql.SqlBuilder.*;
  
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.sql.Connection;
  import java.sql.DriverManager;
  import java.util.List;
  
  import org.apache.ibatis.datasource.unpooled.UnpooledDataSource;
  import org.apache.ibatis.jdbc.ScriptRunner;
  import org.apache.ibatis.mapping.Environment;
  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.apache.ibatis.transaction.jdbc.JdbcTransactionFactory;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.mybatis.dynamic.sql.render.RenderingStrategies;
  import org.mybatis.dynamic.sql.select.render.SelectStatementProvider;
  
  class LimitAndOffsetTest {
  
      private static final String JDBC_URL = "jdbc:hsqldb:mem:aname";
      private static final String JDBC_DRIVER = "org.hsqldb.jdbcDriver";
  
      private SqlSessionFactory sqlSessionFactory;
  
      @BeforeEach
      void setup() throws Exception {
          Class.forName(JDBC_DRIVER);
          try (InputStream is = getClass().getResourceAsStream("/examples/animal/data/CreateAnimalData.sql")) {
              assert is != null;
              try (Connection connection = DriverManager.getConnection(JDBC_URL, "sa", "");
                  InputStreamReader isr = new InputStreamReader(is)) {
                  ScriptRunner sr = new ScriptRunner(connection);
                  sr.setLogWriter(null);
                  sr.runScript(isr);
              }
          }
  
          UnpooledDataSource ds = new UnpooledDataSource(JDBC_DRIVER, JDBC_URL, "sa", "");
          Environment environment = new Environment("test", new JdbcTransactionFactory(), ds);
          Configuration config = new Configuration(environment);
          config.addMapper(AnimalDataMapper.class);
          sqlSessionFactory = new SqlSessionFactoryBuilder().build(config);
      }
  
      @Test
      void testLimitAndOffsetAfterFrom() {
          try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
              SelectStatementProvider selectStatement = select(animalData.allColumns())
                      .from(animalData)
                      .limit(3)
                      .offset(22)
                      .build()
                      .render(RenderingStrategies.MYBATIS3);
  
              AnimalDataMapper mapper = sqlSession.getMapper(AnimalDataMapper.class);
              List<AnimalData> records = mapper.selectMany(selectStatement);
  
              assertAll(
                      () -> assertThat(records).hasSize(3),
                      () -> assertThat(records).first().isNotNull().extracting(AnimalData::id).isEqualTo(23),
                      () -> assertThat(selectStatement.getSelectStatement()).isEqualTo("select * from AnimalData limit #{parameters.p1} offset #{parameters.p2}"),
                      () -> assertThat(selectStatement.getParameters()).containsEntry("p1", 3L),
                      () -> assertThat(selectStatement.getParameters()).containsEntry("p2", 22L)
              );
          }
      }
  
      @Test
      void testLimitOnlyAfterFrom() {
          try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
              SelectStatementProvider selectStatement = select(animalData.allColumns())
                      .from(animalData)
                      .limit(3)
                      .build()
                      .render(RenderingStrategies.MYBATIS3);
 
             AnimalDataMapper mapper = sqlSession.getMapper(AnimalDataMapper.class);
             List<AnimalData> records = mapper.selectMany(selectStatement);
 
             assertAll(
                     () -> assertThat(records).hasSize(3),
                     () -> assertThat(records).first().isNotNull().extracting(AnimalData::id).isEqualTo(1),
                     () -> assertThat(selectStatement.getSelectStatement()).isEqualTo("select * from AnimalData limit #{parameters.p1}"),
                     () -> assertThat(selectStatement.getParameters()).containsEntry("p1", 3L)
             );
         }
     }
 
     @Test
     void testOffsetOnlyAfterFrom() {
         try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
             SelectStatementProvider selectStatement = select(animalData.allColumns())
                     .from(animalData)
                     .offset(22)
                     .build()
                     .render(RenderingStrategies.MYBATIS3);
 
             AnimalDataMapper mapper = sqlSession.getMapper(AnimalDataMapper.class);
             List<AnimalData> records = mapper.selectMany(selectStatement);
 
             assertAll(
                     () -> assertThat(records).hasSize(43),
                     () -> assertThat(records).first().isNotNull().extracting(AnimalData::id).isEqualTo(23),
                     () -> assertThat(selectStatement.getSelectStatement()).isEqualTo("select * from AnimalData offset #{parameters.p1} rows"),
                     () -> assertThat(selectStatement.getParameters()).containsEntry("p1", 22L)
             );
         }
     }
 
     @Test
     void testLimitAndOffsetAfterWhere() {
         try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
             SelectStatementProvider selectStatement = select(animalData.allColumns())
                     .from(animalData)
                     .where(id, isLessThan(50))
                     .and(id, isGreaterThan(22))
                     .limit(3)
                     .offset(22)
                     .build()
                     .render(RenderingStrategies.MYBATIS3);
 
             AnimalDataMapper mapper = sqlSession.getMapper(AnimalDataMapper.class);
             List<AnimalData> records = mapper.selectMany(selectStatement);
 
             assertAll(
                     () -> assertThat(records).hasSize(3),
                     () -> assertThat(records).first().isNotNull().extracting(AnimalData::id).isEqualTo(45),
                     () -> assertThat(selectStatement.getSelectStatement()).isEqualTo("select * from AnimalData where id < #{parameters.p1,jdbcType=INTEGER} and id > #{parameters.p2,jdbcType=INTEGER} limit #{parameters.p3} offset #{parameters.p4}"),
                     () -> assertThat(selectStatement.getParameters()).containsEntry("p3", 3L),
                     () -> assertThat(selectStatement.getParameters()).containsEntry("p4", 22L)
             );
         }
     }
 
     @Test
     void testLimitOnlyAfterWhere() {
         try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
             SelectStatementProvider selectStatement = select(animalData.allColumns())
                     .from(animalData)
                     .where(id, isLessThan(50))
                     .limit(3)
                     .build()
                     .render(RenderingStrategies.MYBATIS3);
 
             AnimalDataMapper mapper = sqlSession.getMapper(AnimalDataMapper.class);
             List<AnimalData> records = mapper.selectMany(selectStatement);
 
             assertAll(
                     () -> assertThat(records).hasSize(3),
                     () -> assertThat(records).first().isNotNull().extracting(AnimalData::id).isEqualTo(1),
                     () -> assertThat(selectStatement.getSelectStatement()).isEqualTo("select * from AnimalData where id < #{parameters.p1,jdbcType=INTEGER} limit #{parameters.p2}"),
                     () -> assertThat(selectStatement.getParameters()).containsEntry("p2", 3L)
             );
         }
     }
 
     @Test
     void testOffsetOnlyAfterWhere() {
         try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
             SelectStatementProvider selectStatement = select(animalData.allColumns())
                     .from(animalData)
                     .where(id, isLessThan(50))
                     .offset(22)
                     .build()
                     .render(RenderingStrategies.MYBATIS3);
 
             AnimalDataMapper mapper = sqlSession.getMapper(AnimalDataMapper.class);
             List<AnimalData> records = mapper.selectMany(selectStatement);
 
             assertAll(
                     () -> assertThat(records).hasSize(27),
                     () -> assertThat(records).first().isNotNull().extracting(AnimalData::id).isEqualTo(23),
                     () -> assertThat(selectStatement.getSelectStatement()).isEqualTo("select * from AnimalData where id < #{parameters.p1,jdbcType=INTEGER} offset #{parameters.p2} rows"),
                     () -> assertThat(selectStatement.getParameters()).containsEntry("p2", 22L)
             );
         }
     }
 
     @Test
     void testLimitAndOffsetAfterOrderBy() {
         try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
             SelectStatementProvider selectStatement = select(animalData.allColumns())
                     .from(animalData)
                     .orderBy(id)
                     .limit(3)
                     .offset(22)
                     .build()
                     .render(RenderingStrategies.MYBATIS3);
 
             AnimalDataMapper mapper = sqlSession.getMapper(AnimalDataMapper.class);
             List<AnimalData> records = mapper.selectMany(selectStatement);
 
             assertAll(
                     () -> assertThat(records).hasSize(3),
                     () -> assertThat(records).first().isNotNull().extracting(AnimalData::id).isEqualTo(23),
                     () -> assertThat(selectStatement.getSelectStatement()).isEqualTo("select * from AnimalData order by id limit #{parameters.p1} offset #{parameters.p2}"),
                     () -> assertThat(selectStatement.getParameters()).containsEntry("p1", 3L),
                     () -> assertThat(selectStatement.getParameters()).containsEntry("p2", 22L)
             );
         }
     }
 
     @Test
     void testLimitOnlyAfterOrderBy() {
         try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
             SelectStatementProvider selectStatement = select(animalData.allColumns())
                     .from(animalData)
                     .orderBy(id)
                     .limit(3)
                     .build()
                     .render(RenderingStrategies.MYBATIS3);
 
             AnimalDataMapper mapper = sqlSession.getMapper(AnimalDataMapper.class);
             List<AnimalData> records = mapper.selectMany(selectStatement);
 
             assertAll(
                     () -> assertThat(records).hasSize(3),
                     () -> assertThat(records).first().isNotNull().extracting(AnimalData::id).isEqualTo(1),
                     () -> assertThat(selectStatement.getSelectStatement()).isEqualTo("select * from AnimalData order by id limit #{parameters.p1}"),
                     () -> assertThat(selectStatement.getParameters()).containsEntry("p1", 3L)
             );
         }
     }
 
     @Test
     void testOffsetOnlyAfterOrderBy() {
         try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
             SelectStatementProvider selectStatement = select(animalData.allColumns())
                     .from(animalData)
                     .orderBy(id)
                     .offset(22)
                     .build()
                     .render(RenderingStrategies.MYBATIS3);
 
             AnimalDataMapper mapper = sqlSession.getMapper(AnimalDataMapper.class);
             List<AnimalData> records = mapper.selectMany(selectStatement);
 
             assertAll(
                     () -> assertThat(records).hasSize(43),
                     () -> assertThat(records).first().isNotNull().extracting(AnimalData::id).isEqualTo(23),
                     () -> assertThat(selectStatement.getSelectStatement()).isEqualTo("select * from AnimalData order by id offset #{parameters.p1} rows"),
                     () -> assertThat(selectStatement.getParameters()).containsEntry("p1", 22L)
             );
         }
     }
 }