package org.xmlsh.aws;

import java.io.IOException;
import java.util.List;
import javax.xml.stream.XMLStreamException;
import org.xmlsh.aws.util.AWSMonCommand;
import org.xmlsh.core.CoreException;
import org.xmlsh.core.Options;
import org.xmlsh.core.UnexpectedException;
import org.xmlsh.core.XValue;
import org.xmlsh.core.io.OutputPort;
import org.xmlsh.util.Util;
import com.amazonaws.services.cloudwatch.model.Dimension;
import com.amazonaws.services.cloudwatch.model.ListMetricsRequest;
import com.amazonaws.services.cloudwatch.model.ListMetricsResult;
import com.amazonaws.services.cloudwatch.model.Metric;
import net.sf.saxon.s9api.SaxonApiException;

public class monListMetrics extends AWSMonCommand {

  /**
   * @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));

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

    }

    int ret = -1;
    ret = list(Util.toStringList(args));

    return ret;

  }

  private int list(List<String> elbs)
      throws IOException, XMLStreamException, SaxonApiException, CoreException {

    OutputPort stdout = this.getStdout();
    mWriter = stdout.asXMLStreamWriter(getSerializeOpts());

    startDocument();
    startElement(getName());

    String nextToken = null;
    do {

      ListMetricsRequest listMetricsRequest = new ListMetricsRequest()
          .withNextToken(nextToken);

      traceCall("listMetrics");

      ListMetricsResult result = getAWSClient().listMetrics(listMetricsRequest);

      for(Metric metric : result.getMetrics()) {
        startElement("metric");
        attribute("name", metric.getMetricName());
        attribute("namespace", metric.getNamespace());
        for(Dimension dim : metric.getDimensions()) {
          startElement("dimension");
          attribute("name", dim.getName());
          characters(dim.getValue());
          endElement();

        }
        endElement();

      }
      nextToken = result.getNextToken();

    } while(nextToken != null);

    endElement();
    endDocument();

    closeWriter();
    stdout.writeSequenceTerminator(getSerializeOpts());

    return 0;

  }

  @Override
  public void usage() {
    super.usage();
  }

}