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/*
 * Copyright 2019 The Data Transfer Project Authors.
 *
 * 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
 *
 * https://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.datatransferproject.transfer.deezer;

import static org.datatransferproject.types.common.models.DataVertical.PLAYLISTS;

import com.google.api.client.http.HttpTransport;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import org.datatransferproject.api.launcher.ExtensionContext;
import org.datatransferproject.api.launcher.Monitor;
import org.datatransferproject.types.common.models.DataVertical;
import org.datatransferproject.spi.transfer.extension.TransferExtension;
import org.datatransferproject.spi.transfer.provider.Exporter;
import org.datatransferproject.spi.transfer.provider.Importer;
import org.datatransferproject.transfer.deezer.playlists.DeezerPlaylistExporter;
import org.datatransferproject.transfer.deezer.playlists.DeezerPlaylistImporter;
import org.datatransferproject.types.common.models.playlists.PlaylistContainerResource;
import org.datatransferproject.types.transfer.auth.TokensAndUrlAuthData;
import org.datatransferproject.types.transfer.serviceconfig.TransferServiceConfig;


public class DeezerTransferExtension implements TransferExtension {
  private static final ImmutableList SUPPORTED_DATA_TYPES = ImmutableList.of(PLAYLISTS);

  private Exporter exporter;
  private Importer importer;

  private boolean initialized = false;

  @Override
  public String getServiceId() {
    return "Deezer";
  }

  @Override
  public Exporter getExporter(DataVertical transferDataType) {
    Preconditions.checkArgument(
        initialized, "DeezerTransferExtension not initialized. Unable to get Exporter");
    Preconditions.checkArgument(SUPPORTED_DATA_TYPES.contains(transferDataType));
    return exporter;
  }

  @Override
  public Importer getImporter(DataVertical transferDataType) {
    Preconditions.checkArgument(
        initialized, "DeezerTransferExtension not initialized. Unable to get Importer");
    Preconditions.checkArgument(SUPPORTED_DATA_TYPES.contains(transferDataType));
    return importer;
  }

  @Override
  public void initialize(ExtensionContext context) {
    if (initialized) {
      Monitor monitor = context.getMonitor();
      monitor.severe(() -> "DeezerTransferExtension already initialized");
      return;
    }

    Monitor monitor = context.getMonitor();
    HttpTransport httpTransport = context.getService(HttpTransport.class);
    TransferServiceConfig transferServiceConfig = context.getService(TransferServiceConfig.class);

    exporter = new DeezerPlaylistExporter(monitor, httpTransport, transferServiceConfig);
    importer = new DeezerPlaylistImporter(monitor, httpTransport, transferServiceConfig);
    initialized = true;
  }
}