/**
 * 
 */
package de.pointedears.converter.net;

import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import de.pointedears.converter.R;
import de.pointedears.converter.helpers.ConverterThread;

/**
 * @author pelinux
 * 
 */
public class RatesUpdater implements Runnable
{
  private static final String URL_ECB =
    "http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml"; //$NON-NLS-1$

  private final Context activityContext;
  private ConverterThread updateThread = null;

  /**
   * 
   */
  public RatesUpdater(Context activityContext)
  {
    this.activityContext = activityContext;
  }

  /**
   * @return the updateThread
   */
  public ConverterThread getUpdateThread()
  {
    return this.updateThread;
  }

  /**
   * @param updateThread
   */
  public void setUpdateThread(ConverterThread updateThread)
  {
    this.updateThread = updateThread;
  }

  /*
   * (non-Javadoc)
   * 
   * @see java.lang.Runnable#run()
   */
  @Override
  public void run()
  {
    if (this.getUpdateThread() != null)
    {
      // CurrenciesActivity.this.editValue1.setText("42");

      DocumentBuilderFactory documentBuilderFactory =
        DocumentBuilderFactory.newInstance();
      documentBuilderFactory.setNamespaceAware(true);
      try
      {
        DocumentBuilder builder =
          documentBuilderFactory.newDocumentBuilder();
        try
        {
          Document doc = builder.parse(RatesUpdater.URL_ECB);
          XPathFactory xpathFactory = XPathFactory.newInstance();
          XPath xpath = xpathFactory.newXPath();
          // NamespaceContextHelper namespaceContext =
          // new NamespaceContextHelper();
          // namespaceContext.add("gesmes",
          // "http://www.gesmes.org/xml/2002-08-01");
          // xpath.setNamespaceContext(namespaceContext);

          try
          {
            /*
             * FIXME: Why doesn't a simple "./Cube/Cube/Cube" work even with a
             * namespace resolver?
             */
            XPathExpression expr =
              xpath
                     .compile("./*[local-name() = 'Cube']/*[local-name() = 'Cube']/*[local-name() = 'Cube']"); //$NON-NLS-1$
            Object result =
              expr.evaluate(doc.getDocumentElement(), XPathConstants.NODESET);
            NodeList nodes = (NodeList) result;

            int len = nodes.getLength();

            String ns = Context.NOTIFICATION_SERVICE;
            NotificationManager mNotificationManager =
              (NotificationManager) this.activityContext
                .getSystemService(ns);

            int icon = R.drawable.icon;
            CharSequence tickerText = "Found " + len + " nodes!";
            long when = System.currentTimeMillis();

            Notification notification =
              new Notification(icon, tickerText, when);

            Context applicationContext =
              this.activityContext.getApplicationContext();
            CharSequence contentTitle = "Converter";
            CharSequence contentText = "Found " + len + " nodes!";
            Intent notificationIntent =
              new Intent(this.activityContext, this.activityContext.getClass());
            PendingIntent contentIntent =
              PendingIntent.getActivity(this.activityContext, 0,
                notificationIntent, 0);

            notification.setLatestEventInfo(applicationContext, contentTitle,
              contentText,
              contentIntent);

            // private static final int HELLO_ID = 1;

            mNotificationManager.notify(1, notification);

            for (int i = 0; i < len; ++i)
            {
              Node item = nodes.item(i);
              NamedNodeMap attributes = item.getAttributes();
              String currency =
                              attributes
                                .getNamedItem("currency").getNodeValue(); //$NON-NLS-1$
              String rate = attributes.getNamedItem("rate").getNodeValue(); //$NON-NLS-1$

              /* TODO: Update UI */
              System.out.println(currency + ": " + rate); //$NON-NLS-1$
            }
          }
          catch (XPathExpressionException e)
          {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }
        }
        catch (SAXException e)
        {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }
        catch (IOException e)
        {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }
      }
      catch (ParserConfigurationException e)
      {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
    }
  }
}