// Copyright (C) 2017 The Android Open Source Project
//
// 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.

package com.googlesource.gerrit.plugins.findowners;

import com.google.common.flogger.FluentLogger;
import com.google.gerrit.exceptions.StorageException;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.account.AccountCache;
import com.google.gerrit.server.account.Emails;
import com.google.gerrit.server.change.ChangeResource;
import com.google.gerrit.server.config.PluginConfigFactory;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.project.ProjectCache;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.inject.Inject;
import com.google.inject.Provider;
import java.io.IOException;
import org.kohsuke.args4j.Option;

/** REST API to get owners of a change. */
public class GetOwners implements RestReadView<ChangeResource> {
  private static final FluentLogger logger = FluentLogger.forEnclosingClass();

  private final Action action;

  // "debug" could be true/yes/1 or false/no/0,
  // when not specified configuration variable "addDebugMsg" is used.
  @Option(name = "--debug", usage = "get extra debug info")
  private String debug;

  // "nocache" could be true/yes/1 or false/no/0, default is false.
  @Option(name = "--nocache", usage = "do not use cached owners info")
  private String nocache;

  @Option(name = "--patchset", usage = "select change patchset number")
  private Integer patchset;

  @Inject
  GetOwners(
      PermissionBackend permissionBackend,
      PluginConfigFactory configFactory,
      Provider<CurrentUser> userProvider,
      ChangeData.Factory dataFactory,
      AccountCache accountCache,
      Emails emails,
      GitRepositoryManager repoManager,
      ProjectCache projectCache) {
    this.action =
        new Action(
            permissionBackend,
            configFactory,
            userProvider,
            dataFactory,
            accountCache,
            emails,
            repoManager,
            projectCache);
  }

  @Override
  public Response<RestResult> apply(ChangeResource rsrc) throws IOException, StorageException {
    Action.Parameters params = new Action.Parameters();
    params.patchset = patchset;
    params.debug = (debug != null) ? Util.parseBoolean(debug) : null;
    params.nocache = (nocache != null) ? Util.parseBoolean(nocache) : null;
    try {
      return this.action.apply(rsrc, params);
    } catch (BadRequestException e) {
      // Catch this exception to avoid too many call stack dumps
      // from bad wrong client requests.
      logger.atSevere().log("Exception: " + e);
      return Response.none();
    }
  }
}