package dk.thoerup.traininfo.provider;



import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;


import android.util.Log;
import dk.thoerup.android.traininfo.common.DepartureBean;
import dk.thoerup.traininfo.util.AndroidTimeoutCache;
import dk.thoerup.traininfo.util.DownloadUtil;
import dk.thoerup.traininfo.util.XmlUtil;

public class XmlDepartureProvider implements DepartureProvider {

	final static int CACHE_TIMEOUT = 60*1000;
		
	
	AndroidTimeoutCache<String,DepartureBean> departureCache = new AndroidTimeoutCache<String,DepartureBean>(CACHE_TIMEOUT); 
	
		
	
	@Override
	public DepartureBean lookupDepartures(int stationID, boolean arrival) {		
		
		String key = "" + stationID + ":" + arrival;
		
		DepartureBean departures = departureCache.get(key);
	
		if (departures == null) {			
			departures = lookupDeparturesWorker(stationID, arrival);
			
			if (departures != null) {			
				departureCache.put(key, departures);
			}
			
		} else {
			Log.i("XmlDepartureProvider", "cache hit !!!");
		}		
		
		return departures;
	}
	
	private DepartureBean lookupDeparturesWorker(int stationID, boolean arrival) {

		try
		{	
			int iArrival = arrival ? 1 : 0;
			String url = XmlUtil.SERVICE_BASE + "/DepartureServlet?format=xml&station=" + stationID + "&arrival=" + iArrival;
			Log.i("xmlurl",url);
			String doc =  DownloadUtil.getContentString(url, 30000, "ISO-8859-1");

			Serializer serializer = new Persister();

			DepartureBean departures = serializer.read(DepartureBean.class, doc);
			
			
			return departures;
			
			
		} catch (Exception e) {
			Log.e("XmlDepartureProvider", "looupFunction", e);
			return null;
		}		
	}
	
}