/*-
 * -\-\-
 * Helios Services
 * --
 * Copyright (C) 2016 Spotify AB
 * --
 * 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.spotify.helios.master;

import com.spotify.helios.common.LoggingConfig;
import com.spotify.helios.servicescommon.ServiceMain;
import com.spotify.helios.servicescommon.coordination.CuratorClientFactory;
import com.spotify.helios.servicescommon.coordination.CuratorClientFactoryImpl;
import net.sourceforge.argparse4j.inf.ArgumentParserException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Instantiates and runs the helios master. We do our own bootstrapping instead of using
 * {@link io.dropwizard.setup.Bootstrap} because we want more control over logging etc.
 */
public class MasterMain extends ServiceMain {

  private static final Logger log = LoggerFactory.getLogger(MasterMain.class);

  private final MasterConfig masterConfig;
  private final CuratorClientFactory curatorClientFactory;
  private MasterService service;

  public MasterMain(final String[] args) throws ArgumentParserException {
    this(new CuratorClientFactoryImpl(), new MasterParser(args));
  }

  public MasterMain(final CuratorClientFactory curatorClientFactory,
                    final String[] args) throws ArgumentParserException {
    this(curatorClientFactory, new MasterParser(args));
  }

  public MasterMain(final CuratorClientFactory curatorClientFactory,
                    final MasterParser parser) {
    this(curatorClientFactory,
        parser.getMasterConfig(),
        parser.getLoggingConfig()
    );
  }

  public MasterMain(final CuratorClientFactory curatorClientFactory,
                    final MasterConfig masterConfig,
                    final LoggingConfig loggingConfig) {
    super(loggingConfig, masterConfig.getSentryDsn());
    this.masterConfig = masterConfig;
    this.curatorClientFactory = curatorClientFactory;
  }

  @Override
  protected void startUp() throws Exception {
    service = new MasterService(masterConfig,
        createEnvironment("helios-master"),
        curatorClientFactory
    );
    service.startAsync().awaitRunning();
  }

  @Override
  protected void shutDown() throws Exception {
    service.stopAsync().awaitTerminated();
  }

  public static void main(final String... args) {
    try {
      final MasterMain main = new MasterMain(args);
      main.startAsync().awaitRunning();
      main.awaitTerminated();
    } catch (Throwable e) {
      log.error("Uncaught exception", e);
      System.exit(1);
    }
    // Ensure we exit even if there's lingering non-daemon threads
    System.exit(0);
  }
}