package org.xmlsh.aws;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import javax.xml.stream.XMLStreamException;
import org.xmlsh.aws.util.AWSEC2Command;
import org.xmlsh.core.CoreException;
import org.xmlsh.core.Options;
import org.xmlsh.core.UnexpectedException;
import org.xmlsh.core.XValue;
import org.xmlsh.util.Util;
import com.amazonaws.services.ec2.model.InstanceStateChange;
import com.amazonaws.services.ec2.model.StartInstancesRequest;
import com.amazonaws.services.ec2.model.StartInstancesResult;
import net.sf.saxon.s9api.SaxonApiException;

public class ec2StartInstances extends AWSEC2Command {

  /**
   * @param args
   * @throws IOException
   */
  @Override
  public int run(List<XValue> args) throws Exception {

    Options opts = getOptions();
    parseOptions(opts, args);

    args = opts.getRemainingArgs();
    setSerializeOpts(this.getSerializeOpts(opts));

    if(args.size() < 1) {
      usage(null);
      return 1;
    }

    try {
      getEC2Client(opts);
    } catch (UnexpectedException e) {
      usage(e.getLocalizedMessage());
      return 1;

    }

    int ret = start(Util.toStringArray(args));

    return ret;

  }

  private int start(String[] instances)
      throws IOException, XMLStreamException, SaxonApiException, CoreException {

    StartInstancesRequest request = new StartInstancesRequest(
        Arrays.asList(instances));

    traceCall("startInstances");
    StartInstancesResult result = getAWSClient().startInstances(request);

    List<InstanceStateChange> changes = result.getStartingInstances();
    writeStateChages(changes);
    return 0;

  }

}