/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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.shardingsphere.test.it.sql.parser.internal.asserts.statement.ddl.impl;
  
  import lombok.AccessLevel;
  import lombok.NoArgsConstructor;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.ddl.index.IndexSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.generic.table.SimpleTableSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.statement.ddl.DropIndexStatement;
  import org.apache.shardingsphere.sql.parser.sql.dialect.handler.ddl.DropIndexStatementHandler;
  import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.ddl.OracleDropIndexStatement;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.SQLCaseAssertContext;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.index.IndexAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.table.TableAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.statement.ddl.DropIndexStatementTestCase;
  
  import java.util.Optional;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  /**
   * Drop index statement assert.
   */
  @NoArgsConstructor(access = AccessLevel.PRIVATE)
  public final class DropIndexStatementAssert {
      
      /**
       * Assert drop index statement is correct with expected parser result.
       * 
       * @param assertContext assert context
       * @param actual actual drop index statement
       * @param expected expected drop index statement test case
       */
      public static void assertIs(final SQLCaseAssertContext assertContext, final DropIndexStatement actual, final DropIndexStatementTestCase expected) {
          assertTables(assertContext, actual, expected);
          assertIndex(assertContext, actual, expected);
          assertLockTable(assertContext, actual, expected);
          assertAlgorithm(assertContext, actual, expected);
      }
      
      private static void assertTables(final SQLCaseAssertContext assertContext, final DropIndexStatement actual, final DropIndexStatementTestCase expected) {
          Optional<SimpleTableSegment> simpleTableSegment = DropIndexStatementHandler.getSimpleTableSegment(actual);
          if (null == expected.getTable()) {
              assertFalse(simpleTableSegment.isPresent(), assertContext.getText("Actual table segment should not exist."));
          } else {
              assertTrue(simpleTableSegment.isPresent(), assertContext.getText("Actual table segment should exist."));
              TableAssert.assertIs(assertContext, simpleTableSegment.get(), expected.getTable());
          }
      }
      
      private static void assertIndex(final SQLCaseAssertContext assertContext, final DropIndexStatement actual, final DropIndexStatementTestCase expected) {
          // TODO should assert index for all databases(mysql and sqlserver do not parse index right now)
          if (actual instanceof OracleDropIndexStatement) {
              int count = 0;
              for (IndexSegment each : actual.getIndexes()) {
                  IndexAssert.assertIs(assertContext, each, expected.getIndexes().get(count));
                  count++;
              }
          }
      }
      
      private static void assertLockTable(final SQLCaseAssertContext assertContext, final DropIndexStatement actual, final DropIndexStatementTestCase expected) {
          if (null == expected.getLockOption()) {
              assertFalse(DropIndexStatementHandler.getLockTableSegment(actual).isPresent(), assertContext.getText("Actual lock table segments should not exist."));
          } else {
              assertTrue(DropIndexStatementHandler.getLockTableSegment(actual).isPresent(), assertContext.getText("Actual lock table segments should exist."));
              assertThat(assertContext.getText(String.format("`%s`'s lock table assertion error: ", actual.getClass().getSimpleName())),
                      DropIndexStatementHandler.getLockTableSegment(actual).get().getLockTableOption().name(), is(expected.getLockOption().getType()));
          }
      }
      
      private static void assertAlgorithm(final SQLCaseAssertContext assertContext, final DropIndexStatement actual, final DropIndexStatementTestCase expected) {
          if (null == expected.getAlgorithmOption()) {
              assertFalse(DropIndexStatementHandler.getAlgorithmTypeSegment(actual).isPresent(), assertContext.getText("Actual algorithm segments should not exist."));
          } else {
              assertTrue(DropIndexStatementHandler.getAlgorithmTypeSegment(actual).isPresent(), assertContext.getText("Actual algorithm segments should exist."));
              assertThat(assertContext.getText(String.format("`%s`'s algorithm assertion error: ", actual.getClass().getSimpleName())),
                      DropIndexStatementHandler.getAlgorithmTypeSegment(actual).get().getAlgorithmOption().name(), is(expected.getAlgorithmOption().getType()));
          }
      }
  }