/*
    * 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.encrypt.rewrite.token.pojo;
  
  import lombok.Getter;
  import org.apache.shardingsphere.infra.rewrite.sql.token.common.pojo.SQLToken;
  import org.apache.shardingsphere.infra.rewrite.sql.token.common.pojo.Substitutable;
  import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.expr.ExpressionSegment;
  import org.apache.shardingsphere.sql.parser.statement.core.segment.dml.expr.FunctionSegment;
  
  import java.util.Collection;
  import java.util.Map;
  import java.util.concurrent.atomic.AtomicInteger;
  
  /**
   * Predicate in right value token for encrypt.
   */
  public final class EncryptPredicateFunctionRightValueToken extends SQLToken implements Substitutable {
      
      private static final String COMMA_SEPARATOR = ", ";
      
      @Getter
      private final int stopIndex;
      
      private final String functionName;
      
      private final Collection<ExpressionSegment> parameters;
      
      private final Map<Integer, Object> indexValues;
      
      private final Collection<Integer> paramMarkerIndexes;
      
      public EncryptPredicateFunctionRightValueToken(final int startIndex, final int stopIndex, final String functionName, final Collection<ExpressionSegment> parameters,
                                                     final Map<Integer, Object> indexValues, final Collection<Integer> paramMarkerIndexes) {
          super(startIndex);
          this.stopIndex = stopIndex;
          this.functionName = functionName;
          this.parameters = parameters;
          this.indexValues = indexValues;
          this.paramMarkerIndexes = paramMarkerIndexes;
      }
      
      @Override
      public String toString() {
          StringBuilder result = new StringBuilder();
          AtomicInteger parameterIndex = new AtomicInteger();
          appendFunctionSegment(functionName, parameters, result, parameterIndex);
          return result.toString();
      }
      
      private void appendFunctionSegment(final String functionName, final Collection<ExpressionSegment> parameters, final StringBuilder builder, final AtomicInteger parameterIndex) {
          builder.append(functionName).append(" (");
          for (ExpressionSegment each : parameters) {
              if (each instanceof FunctionSegment) {
                  appendFunctionSegment(((FunctionSegment) each).getFunctionName(), ((FunctionSegment) each).getParameters(), builder, parameterIndex);
                  builder.append(COMMA_SEPARATOR);
              } else {
                  appendRewrittenParameters(builder, parameterIndex.getAndIncrement());
              }
          }
          if (builder.toString().endsWith(COMMA_SEPARATOR)) {
              builder.delete(builder.length() - 2, builder.length());
          }
          builder.append(')');
      }
      
      private void appendRewrittenParameters(final StringBuilder builder, final int parameterIndex) {
          if (paramMarkerIndexes.contains(parameterIndex)) {
              builder.append('?');
          } else {
              if (indexValues.get(parameterIndex) instanceof String) {
                  builder.append('\'').append(indexValues.get(parameterIndex)).append('\'');
              } else {
                  builder.append(indexValues.get(parameterIndex));
              }
          }
          builder.append(COMMA_SEPARATOR);
      }
  }