package de.fu_berlin.agdb.yahoo_importer;

import java.util.ArrayList;
import java.util.List;

import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;

import de.fu_berlin.agdb.importer.AWeatherImporter;
import de.fu_berlin.agdb.importer.payload.LocationMetaData;
import de.fu_berlin.agdb.importer.payload.LocationWeatherData;
import de.fu_berlin.agdb.yahoo_importer.core.IWorkProvider;
import de.fu_berlin.agdb.yahoo_importer.core.YahooDataLoaderWorker;

public class YahooImporter extends AWeatherImporter implements IWorkProvider{
	
	private static final Logger logger = LogManager.getLogger(YahooImporter.class);
	
	private static final int NUMBER_OF_THREADS = 10;
	
	private ArrayList<Thread> threadPool;
	
	private ArrayList<LocationWeatherData> accumulatedData;
	private List<LocationMetaData> locationsToBeDone;

	public YahooImporter() {
		threadPool = new ArrayList<Thread>();
	}

	@Override
	protected List<LocationWeatherData> getWeatherDataForLocations(List<LocationMetaData> locations) {
		locationsToBeDone = locations;
		
		accumulatedData = new ArrayList<LocationWeatherData>();
		
		for(int i = 0; i < NUMBER_OF_THREADS; i++){
			Thread thread = new Thread(new YahooDataLoaderWorker(this));
			threadPool.add(thread);
			thread.start();
		}
		
		while(!threadPool.isEmpty()){
			try {
				Thread thread = threadPool.get(0);
				thread.join();
				threadPool.remove(thread);
			} catch (InterruptedException e) {
				logger.error("Interrupted while waiting for thread:", e);
			}
		}
		
		return accumulatedData;
	}

	@Override
	protected long getServiceTimeout() {
		//30 seconds
		return 1*30*1000;
	}

	@Override
	public LocationMetaData getWork() {
		synchronized (locationsToBeDone){
			if(!locationsToBeDone.isEmpty()){
				LocationMetaData work = locationsToBeDone.get(0);
				locationsToBeDone.remove(work);
				return work;
			} else {
				return null;
			}
		}
	}

	@Override
	public void deliverResult(List<LocationWeatherData> dataForLocation) {
		synchronized (accumulatedData) {
			if(dataForLocation != null){
				accumulatedData.addAll(dataForLocation);
			}
		}
	}
}

@@ -1599,14 +1599,14 @@
 /30 
-second
+minute
 s%0A%09%09
@@ -1616,11 +1616,12 @@
 urn 
-1*3
+30*6
 0*10

set the update interval to 30 minutes