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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.server.ha.message;

import com.arcadedb.database.Binary;
import com.arcadedb.server.ArcadeDBServer;
import com.arcadedb.server.ha.HAServer;

import java.util.*;

public class DatabaseStructureResponse extends HAAbstractCommand {
  private String               schemaJson;
  private Map fileNames;
  private long                 currentLogNumber;

  public DatabaseStructureResponse() {
  }

  public DatabaseStructureResponse(final String schemaJson, final Map fileNames, final long currentLogNumber) {
    this.schemaJson = schemaJson;
    this.fileNames = fileNames;
    this.currentLogNumber = currentLogNumber;
  }

  public Map getFileNames() {
    return fileNames;
  }

  public String getSchemaJson() {
    return schemaJson;
  }

  public long getCurrentLogNumber() {
    return currentLogNumber;
  }

  @Override
  public void toStream(final Binary stream) {
    stream.putString(schemaJson);
    stream.putLong(currentLogNumber);

    stream.putUnsignedNumber(fileNames.size());
    for (final Map.Entry file : fileNames.entrySet()) {
      stream.putInt(file.getKey());
      stream.putByte((byte) (file.getValue() != null ? 1 : 0));
      if (file.getValue() != null)
        stream.putString(file.getValue());
    }
  }

  @Override
  public void fromStream(final ArcadeDBServer server, final Binary stream) {
    schemaJson = stream.getString();
    currentLogNumber = stream.getLong();

    fileNames = new HashMap<>();
    final int fileCount = (int) stream.getUnsignedNumber();
    for (int i = 0; i < fileCount; ++i) {
      final int fileId = stream.getInt();
      final boolean notNull = stream.getByte() == 1;
      if (notNull)
        fileNames.put(fileId, stream.getString());
      else
        fileNames.put(fileId, null);
    }
  }

  @Override
  public HACommand execute(final HAServer server, final String remoteServerName, final long messageNumber) {
    return null;
  }

  @Override
  public String toString() {
    return "dbstructure=" + fileNames + " initialLogNumber=" + currentLogNumber;
  }
}