/*
    * 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.infra.rewrite.sql.token.pojo.generic;
  
  import lombok.Getter;
  import lombok.RequiredArgsConstructor;
  import org.apache.shardingsphere.sql.parser.sql.common.enums.ParameterMarkerType;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExpressionSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.simple.LiteralExpressionSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.simple.ParameterMarkerExpressionSegment;
  
  import java.util.List;
  import java.util.StringJoiner;
  
  /**
   * Insert value.
   */
  @RequiredArgsConstructor
  @Getter
  public class InsertValue {
      
      private final List<ExpressionSegment> values;
      
      @Override
      public final String toString() {
          StringJoiner result = new StringJoiner(", ", "(", ")");
          for (int i = 0; i < values.size(); i++) {
              result.add(getValue(i));
          }
          return result.toString();
      }
      
      private String getValue(final int index) {
          ExpressionSegment expressionSegment = values.get(index);
          if (expressionSegment instanceof ParameterMarkerExpressionSegment) {
              ParameterMarkerExpressionSegment segment = (ParameterMarkerExpressionSegment) expressionSegment;
              return ParameterMarkerType.QUESTION == segment.getParameterMarkerType() ? "?" : "$" + (segment.getParameterMarkerIndex() + 1);
          }
          if (expressionSegment instanceof LiteralExpressionSegment) {
              Object literals = ((LiteralExpressionSegment) expressionSegment).getLiterals();
              return getLiteralValue((LiteralExpressionSegment) expressionSegment, literals);
          }
          return expressionSegment.getText();
      }
      
      private String getLiteralValue(final LiteralExpressionSegment expressionSegment, final Object literals) {
          if (null == literals) {
              return "NULL";
          }
          return literals instanceof String ? "'" + expressionSegment.getLiterals() + "'" : String.valueOf(literals);
      }
  }