// Copyright (C) 2013 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.rabbitmq;

import com.google.common.flogger.FluentLogger;
import com.google.gerrit.extensions.annotations.PluginName;
import com.google.gerrit.extensions.events.LifecycleListener;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.googlesource.gerrit.plugins.rabbitmq.config.Properties;
import com.googlesource.gerrit.plugins.rabbitmq.config.section.General;
import com.googlesource.gerrit.plugins.rabbitmq.config.section.Gerrit;
import com.googlesource.gerrit.plugins.rabbitmq.message.BaseProperties;
import com.googlesource.gerrit.plugins.rabbitmq.message.GerritEventPublisherFactory;
import com.googlesource.gerrit.plugins.rabbitmq.message.Publisher;
import com.googlesource.gerrit.plugins.rabbitmq.message.PublisherPropertiesProvider;
import com.googlesource.gerrit.plugins.rabbitmq.worker.DefaultEventWorker;
import com.googlesource.gerrit.plugins.rabbitmq.worker.EventWorker;
import com.googlesource.gerrit.plugins.rabbitmq.worker.EventWorkerFactory;
import java.util.ArrayList;
import java.util.List;

@Singleton
public class Manager implements LifecycleListener {

  private static final FluentLogger logger = FluentLogger.forEnclosingClass();

  private final String pluginName;
  private final EventWorker defaultEventWorker;
  private final EventWorker userEventWorker;
  private final GerritEventPublisherFactory publisherFactory;
  private final List<Publisher> publisherList = new ArrayList<>();
  private final Properties baseProperties;
  private final PublisherPropertiesProvider publisherPropertiesProvider;

  @Inject
  public Manager(
      @PluginName final String pluginName,
      final DefaultEventWorker defaultEventWorker,
      final EventWorkerFactory eventWorkerFactory,
      final GerritEventPublisherFactory publisherFactory,
      final @BaseProperties Properties baseProperties,
      final PublisherPropertiesProvider publisherPropertiesProvider) {
    this.pluginName = pluginName;
    this.defaultEventWorker = defaultEventWorker;
    this.userEventWorker = eventWorkerFactory.create();
    this.publisherFactory = publisherFactory;
    this.baseProperties = baseProperties;
    this.publisherPropertiesProvider = publisherPropertiesProvider;
  }

  @Override
  public void start() {
    if (baseProperties.getSection(General.class).publishAllGerritEvents) {
      logger.atFine().log("publishAllGerritEvents enabled");
      for (Properties properties : publisherPropertiesProvider.get()) {
        Publisher publisher = publisherFactory.create(properties);
        publisher.start();
        String listenAs = properties.getSection(Gerrit.class).listenAs;
        if (!listenAs.isEmpty()) {
          userEventWorker.addPublisher(pluginName, publisher, listenAs);
        } else {
          defaultEventWorker.addPublisher(publisher);
        }
        publisherList.add(publisher);
      }
    }
  }

  @Override
  public void stop() {
    for (Publisher publisher : publisherList) {
      publisher.stop();
    }
    defaultEventWorker.clear();
    userEventWorker.clear();
    publisherList.clear();
  }
}