/*
    * 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.dml.impl;
  
  import lombok.AccessLevel;
  import lombok.NoArgsConstructor;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.order.OrderBySegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.pagination.limit.LimitSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.generic.OutputSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.statement.dml.UpdateStatement;
  import org.apache.shardingsphere.sql.parser.sql.dialect.handler.dml.UpdateStatementHandler;
  import org.apache.shardingsphere.sql.parser.sql.dialect.segment.sqlserver.hint.OptionHintSegment;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.SQLCaseAssertContext;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.SQLSegmentAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.limit.LimitClauseAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.orderby.OrderByClauseAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.output.OutputClauseAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.set.SetClauseAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.table.TableAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.where.WhereClauseAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.statement.dml.UpdateStatementTestCase;
  
  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.assertNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  /**
   * Update statement assert.
   */
  @NoArgsConstructor(access = AccessLevel.PRIVATE)
  public final class UpdateStatementAssert {
      
      /**
       * Assert update statement is correct with expected parser result.
       *
       * @param assertContext assert context
       * @param actual actual update statement
       * @param expected expected parser result
       */
      public static void assertIs(final SQLCaseAssertContext assertContext, final UpdateStatement actual, final UpdateStatementTestCase expected) {
          assertTable(assertContext, actual, expected);
          assertSetClause(assertContext, actual, expected);
          assertWhereClause(assertContext, actual, expected);
          assertOrderByClause(assertContext, actual, expected);
          assertLimitClause(assertContext, actual, expected);
          assertOptionHint(assertContext, actual, expected);
          assertOutputClause(assertContext, actual, expected);
      }
      
      private static void assertTable(final SQLCaseAssertContext assertContext, final UpdateStatement actual, final UpdateStatementTestCase expected) {
          if (null == expected.getTable()) {
              assertNull(actual.getTable(), assertContext.getText("Actual from should not exist."));
          } else {
              TableAssert.assertIs(assertContext, actual.getTable(), expected.getTable());
          }
      }
      
      private static void assertSetClause(final SQLCaseAssertContext assertContext, final UpdateStatement actual, final UpdateStatementTestCase expected) {
          SetClauseAssert.assertIs(assertContext, actual.getSetAssignment(), expected.getSetClause());
      }
      
      private static void assertWhereClause(final SQLCaseAssertContext assertContext, final UpdateStatement actual, final UpdateStatementTestCase expected) {
          if (null == expected.getWhereClause()) {
              assertFalse(actual.getWhere().isPresent(), assertContext.getText("Actual where segment should not exist."));
          } else {
              assertTrue(actual.getWhere().isPresent(), assertContext.getText("Actual where segment should exist."));
              WhereClauseAssert.assertIs(assertContext, actual.getWhere().get(), expected.getWhereClause());
          }
      }
      
      private static void assertOrderByClause(final SQLCaseAssertContext assertContext, final UpdateStatement actual, final UpdateStatementTestCase expected) {
          Optional<OrderBySegment> orderBySegment = UpdateStatementHandler.getOrderBySegment(actual);
          if (null == expected.getOrderByClause()) {
              assertFalse(orderBySegment.isPresent(), assertContext.getText("Actual order by segment should not exist."));
          } else {
              assertTrue(orderBySegment.isPresent(), assertContext.getText("Actual order by segment should exist."));
              OrderByClauseAssert.assertIs(assertContext, orderBySegment.get(), expected.getOrderByClause());
          }
      }
      
     private static void assertLimitClause(final SQLCaseAssertContext assertContext, final UpdateStatement actual, final UpdateStatementTestCase expected) {
         Optional<LimitSegment> limitSegment = UpdateStatementHandler.getLimitSegment(actual);
         if (null == expected.getLimitClause()) {
             assertFalse(limitSegment.isPresent(), assertContext.getText("Actual limit segment should not exist."));
         } else {
             assertTrue(limitSegment.isPresent(), assertContext.getText("Actual limit segment should exist."));
             LimitClauseAssert.assertRowCount(assertContext, limitSegment.get().getRowCount().orElse(null), expected.getLimitClause().getRowCount());
             SQLSegmentAssert.assertIs(assertContext, limitSegment.get(), expected.getLimitClause());
         }
     }
     
     private static void assertOptionHint(final SQLCaseAssertContext assertContext, final UpdateStatement actual, final UpdateStatementTestCase expected) {
         Optional<OptionHintSegment> optionHintSegment = UpdateStatementHandler.getOptionHintSegment(actual);
         if (null == expected.getOptionHint()) {
             assertFalse(optionHintSegment.isPresent(), assertContext.getText("Actual option hint segment should not exist."));
         } else {
             assertTrue(optionHintSegment.isPresent(), assertContext.getText("Actual option hint segment should exist."));
             assertThat(assertContext.getText("Option hint text assertion error: "), optionHintSegment.get().getText(), is(expected.getOptionHint().getText()));
             SQLSegmentAssert.assertIs(assertContext, optionHintSegment.get(), expected.getOptionHint());
         }
     }
     
     private static void assertOutputClause(final SQLCaseAssertContext assertContext, final UpdateStatement actual, final UpdateStatementTestCase expected) {
         Optional<OutputSegment> outputSegment = UpdateStatementHandler.getOutputSegment(actual);
         if (null == expected.getOutputClause()) {
             assertFalse(outputSegment.isPresent(), assertContext.getText("Actual output segment should not exist."));
         } else {
             assertTrue(outputSegment.isPresent(), assertContext.getText("Actual output segment should exist."));
             OutputClauseAssert.assertIs(assertContext, outputSegment.get(), expected.getOutputClause());
         }
     }
 }