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/*
 * Copyright © 2021-present Arcade Data Ltd ([email protected])
 *
 * 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.
 *
 * SPDX-FileCopyrightText: 2021-present Arcade Data Ltd ([email protected])
 * SPDX-License-Identifier: Apache-2.0
 */
package com.arcadedb.gremlin.query;

import com.arcadedb.exception.QueryParsingException;
import com.arcadedb.query.QueryEngine;
import com.arcadedb.query.sql.executor.ResultInternal;
import com.arcadedb.query.sql.executor.ResultSet;
import org.apache.tinkerpop.gremlin.arcadedb.structure.ArcadeCypher;
import org.apache.tinkerpop.gremlin.arcadedb.structure.ArcadeGraph;

import java.util.*;
import java.util.stream.*;

public class CypherQueryEngine implements QueryEngine {
  static final  String      ENGINE_NAME = "cypher-engine";
  private final ArcadeGraph arcadeGraph;

  protected CypherQueryEngine(final ArcadeGraph arcadeGraph) {
    this.arcadeGraph = arcadeGraph;
  }

  @Override
  public AnalyzedQuery analyze(String query) {
    return new AnalyzedQuery() {
      @Override
      public boolean isIdempotent() {
        return false;
      }

      @Override
      public boolean isDDL() {
        return false;
      }
    };
  }

  @Override
  public ResultSet query(final String query, final Map parameters) {
    return command(query, parameters);
  }

  @Override
  public ResultSet query(final String query, final Object... parameters) {
    return command(query, parameters);
  }

  @Override
  public ResultSet command(final String query, final Map parameters) {
    try {
      final ArcadeCypher arcadeCypher = arcadeGraph.cypher(query, parameters);
      arcadeCypher.setParameters(parameters);
      return arcadeCypher.execute();

    } catch (Exception e) {
      throw new QueryParsingException("Error on executing Cypher query", e);
    }
  }

  public static Object transformValue(final Object value) {
    if (value instanceof Map) {
      final List list = transformMap((Map) value);
      if (list.size() == 1)
        return list.get(0);
      return list;
    } else if (value instanceof List) {
      List listValue = (List) value;
      List