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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.query.sql.parser;

import com.arcadedb.query.sql.executor.CommandContext;

import java.util.*;

/**
 * Created by luigidellaquila on 18/02/15.
 */
public class JsonItem {
  protected Identifier leftIdentifier;
  protected String     leftString;
  protected Expression right;

  public void toString(final Map params, final StringBuilder builder) {
    if (leftIdentifier != null) {
      builder.append("\"");
      leftIdentifier.toString(params, builder);
      builder.append("\"");
    }
    if (leftString != null) {
      builder.append("\"");
      builder.append(Expression.encode(leftString));
      builder.append("\"");
    }
    builder.append(": ");
    right.toString(params, builder);
  }

  public String getLeftValue() {
    if (leftString != null) {
      return leftString;
    }
    if (leftIdentifier != null) {
      return leftIdentifier.getStringValue();
    }
    return null;
  }

  public boolean isAggregate(final CommandContext context) {
    return right.isAggregate(context);
  }

  public JsonItem splitForAggregation(final AggregateProjectionSplit aggregateSplit, final CommandContext context) {
    if (isAggregate(context)) {
      final JsonItem item = new JsonItem();
      item.leftIdentifier = leftIdentifier;
      item.leftString = leftString;
      item.right = right.splitForAggregation(aggregateSplit, context);
      return item;
    } else {
      return this;
    }
  }

  public JsonItem copy() {
    final JsonItem result = new JsonItem();
    result.leftIdentifier = leftIdentifier == null ? null : leftIdentifier.copy();
    result.leftString = leftString;
    result.right = right.copy();
    return result;
  }

  public void extractSubQueries(final SubQueryCollector collector) {
    right.extractSubQueries(collector);
  }

  public boolean refersToParent() {
    return right != null && right.refersToParent();
  }

  @Override
  public boolean equals(final Object o) {
    if (this == o)
      return true;
    if (o == null || getClass() != o.getClass())
      return false;

    final JsonItem oJsonItem = (JsonItem) o;

    if (!Objects.equals(leftIdentifier, oJsonItem.leftIdentifier))
      return false;
    if (!Objects.equals(leftString, oJsonItem.leftString))
      return false;
    return Objects.equals(right, oJsonItem.right);
  }

  @Override
  public int hashCode() {
    int result = leftIdentifier != null ? leftIdentifier.hashCode() : 0;
    result = 31 * result + (leftString != null ? leftString.hashCode() : 0);
    result = 31 * result + (right != null ? right.hashCode() : 0);
    return result;
  }
}