/*
    *    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.jdbc;
  
  import static org.apache.ibatis.jdbc.SelectBuilder.*;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import org.junit.jupiter.api.Test;
  
  class SelectBuilderTest {
  
    @Test
    void shouldProduceExpectedSimpleSelectStatement() {
      String expected =
          "SELECT P.ID, P.USERNAME, P.PASSWORD, P.FIRST_NAME, P.LAST_NAME\n" +
              "FROM PERSON P\n" +
              "WHERE (P.ID like #id# AND P.FIRST_NAME like #firstName# AND P.LAST_NAME like #lastName#)\n" +
              "ORDER BY P.LAST_NAME";
      assertEquals(expected, example2("a", "b", "c"));
    }
  
    @Test
    void shouldProduceExpectedSimpleSelectStatementMissingFirstParam() {
      String expected =
          "SELECT P.ID, P.USERNAME, P.PASSWORD, P.FIRST_NAME, P.LAST_NAME\n" +
              "FROM PERSON P\n" +
              "WHERE (P.FIRST_NAME like #firstName# AND P.LAST_NAME like #lastName#)\n" +
              "ORDER BY P.LAST_NAME";
      assertEquals(expected, example2(null, "b", "c"));
    }
  
    @Test
    void shouldProduceExpectedSimpleSelectStatementMissingFirstTwoParams() {
      String expected =
          "SELECT P.ID, P.USERNAME, P.PASSWORD, P.FIRST_NAME, P.LAST_NAME\n" +
              "FROM PERSON P\n" +
              "WHERE (P.LAST_NAME like #lastName#)\n" +
              "ORDER BY P.LAST_NAME";
      assertEquals(expected, example2(null, null, "c"));
    }
  
    @Test
    void shouldProduceExpectedSimpleSelectStatementMissingAllParams() {
      String expected =
          "SELECT P.ID, P.USERNAME, P.PASSWORD, P.FIRST_NAME, P.LAST_NAME\n" +
              "FROM PERSON P\n" +
              "ORDER BY P.LAST_NAME";
      assertEquals(expected, example2(null, null, null));
    }
  
    @Test
    void shouldProduceExpectedComplexSelectStatement() {
      String expected =
          "SELECT P.ID, P.USERNAME, P.PASSWORD, P.FULL_NAME, P.LAST_NAME, P.CREATED_ON, P.UPDATED_ON\n" +
              "FROM PERSON P, ACCOUNT A\n" +
              "INNER JOIN DEPARTMENT D on D.ID = P.DEPARTMENT_ID\n" +
              "INNER JOIN COMPANY C on D.COMPANY_ID = C.ID\n" +
              "WHERE (P.ID = A.ID AND P.FIRST_NAME like ?) \n" +
              "OR (P.LAST_NAME like ?)\n" +
              "GROUP BY P.ID\n" +
              "HAVING (P.LAST_NAME like ?) \n" +
              "OR (P.FIRST_NAME like ?)\n" +
              "ORDER BY P.ID, P.FULL_NAME";
      assertEquals(expected, example1());
    }
  
    private static String example1() {
      SELECT("P.ID, P.USERNAME, P.PASSWORD, P.FULL_NAME");
      SELECT("P.LAST_NAME, P.CREATED_ON, P.UPDATED_ON");
      FROM("PERSON P");
      FROM("ACCOUNT A");
      INNER_JOIN("DEPARTMENT D on D.ID = P.DEPARTMENT_ID");
      INNER_JOIN("COMPANY C on D.COMPANY_ID = C.ID");
      WHERE("P.ID = A.ID");
      WHERE("P.FIRST_NAME like ?");
      OR();
      WHERE("P.LAST_NAME like ?");
      GROUP_BY("P.ID");
      HAVING("P.LAST_NAME like ?");
      OR();
      HAVING("P.FIRST_NAME like ?");
      ORDER_BY("P.ID");
      ORDER_BY("P.FULL_NAME");
      return SQL();
    }
  
   private static String example2(String id, String firstName, String lastName) {
     SELECT("P.ID, P.USERNAME, P.PASSWORD, P.FIRST_NAME, P.LAST_NAME");
     FROM("PERSON P");
     if (id != null) {
       WHERE("P.ID like #id#");
     }
     if (firstName != null) {
       WHERE("P.FIRST_NAME like #firstName#");
     }
     if (lastName != null) {
       WHERE("P.LAST_NAME like #lastName#");
     }
     ORDER_BY("P.LAST_NAME");
     return SQL();
   }
 
 
 }