/*-
 * -\-\-
 * Helios Tools
 * --
 * 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.cli.command;

import static net.sourceforge.argparse4j.impl.Arguments.append;
import static net.sourceforge.argparse4j.impl.Arguments.storeTrue;

import com.google.common.collect.Lists;
import com.spotify.helios.cli.Utils;
import com.spotify.helios.client.HeliosClient;
import com.spotify.helios.common.descriptors.DeploymentGroup;
import com.spotify.helios.common.descriptors.HostSelector;
import com.spotify.helios.common.protocol.CreateDeploymentGroupResponse;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintStream;
import java.util.List;
import java.util.concurrent.ExecutionException;
import net.sourceforge.argparse4j.inf.Argument;
import net.sourceforge.argparse4j.inf.Namespace;
import net.sourceforge.argparse4j.inf.Subparser;

public class DeploymentGroupCreateCommand extends ControlCommand {

  private final Argument nameArg;
  private final Argument hostSelectorsArg;
  private final Argument quietArg;

  public DeploymentGroupCreateCommand(final Subparser parser) {
    super(parser);

    parser.help("create a deployment group");

    nameArg = parser.addArgument("name")
        .required(true)
        .help("Deployment group name");

    hostSelectorsArg = parser.addArgument("host_selectors")
        .action(append())
        .setDefault(Lists.newArrayList())
        .nargs("+")
        .help("Host selector expression. Hosts matching this expression will be part of the "
              + "deployment-group. Multiple conditions can be specified, separated by spaces (as "
              + "separate arguments). If multiple conditions are given, all must be fulfilled. "
              + "Operators supported are =, !=, in and notin. Example: foo=bar baz!=qux");

    quietArg = parser.addArgument("-q")
        .action(storeTrue())
        .help("only print job id");
  }

  @Override
  int run(final Namespace options, final HeliosClient client, final PrintStream out,
          final boolean json, final BufferedReader stdin)
      throws ExecutionException, InterruptedException, IOException {
    final String name = options.getString(nameArg.getDest());
    final List<HostSelector> hostSelectors = Utils.parseHostSelectors(options, hostSelectorsArg);
    final boolean quiet = options.getBoolean(quietArg.getDest());

    final DeploymentGroup deploymentGroup = DeploymentGroup.newBuilder()
        .setName(name)
        .setHostSelectors(hostSelectors)
        .build();

    if (!quiet && !json) {
      out.println("Creating deployment group: " + deploymentGroup.toJsonString());
    }

    final CreateDeploymentGroupResponse status =
        client.createDeploymentGroup(deploymentGroup).get();

    if (status == null) {
      throw new RuntimeException("The Helios master could not create a deployment group.");
    }

    if (status.getStatus() != CreateDeploymentGroupResponse.Status.CONFLICT) {
      out.println(status.toJsonString());
      return 0;
    } else {
      if (!quiet && !json) {
        out.println("Failed: " + status);
      } else if (json) {
        out.println(status.toJsonString());
      }
      return 1;
    }
  }
}