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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.executor;

import com.arcadedb.database.Document;
import com.arcadedb.database.MutableDocument;
import com.arcadedb.database.Record;
import com.arcadedb.exception.TimeoutException;
import com.arcadedb.query.sql.parser.Identifier;

/**
 * Assigns a class to documents coming from upstream
 *
 * @author Luigi Dell'Aquila (luigi.dellaquila-(at)-gmail.com)
 */
public class SetDocumentStepStep extends AbstractExecutionStep {
  private final String targetClass;

  public SetDocumentStepStep(final Identifier targetClass, final CommandContext context, final boolean profilingEnabled) {
    super(context, profilingEnabled);
    this.targetClass = targetClass.getStringValue();
  }

  @Override
  public ResultSet syncPull(final CommandContext context, final int nRecords) throws TimeoutException {
    final ResultSet upstream = getPrev().syncPull(context, nRecords);
    return new ResultSet() {
      @Override
      public boolean hasNext() {
        return upstream.hasNext();
      }

      @Override
      public Result next() {
        Result result = upstream.next();

        if (result.isElement()) {
          final Record element = result.getElement().get().getRecord();
          if (!(result instanceof ResultInternal)) {
            result = new UpdatableResult((MutableDocument) element);
          } else {
            ((ResultInternal) result).setElement((Document) element);
          }
        }
        return result;
      }

      @Override
      public void close() {
        upstream.close();
      }
    };
  }

  @Override
  public String prettyPrint(final int depth, final int indent) {
    final String spaces = ExecutionStepInternal.getIndent(depth, indent);
    final String result = spaces + "+ SET TYPE\n" + spaces + "  " + this.targetClass;
    return result;
  }
}