package dk.daoas.fulddaekning;

import java.util.Map;
import java.util.Queue;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.logging.Level;
import java.util.logging.Logger;

import dk.daoas.fulddaekning.BoundingBox.BoundingBoxException;

public class Lookup {

	
	
	final static Logger logger = Logger.getLogger( Lookup.class.toString() );
	
	int postnr;
	Database db;
		
	Adresse daekkedeAdresser[];
	Queue<Adresse> queue;
	
	Map<Integer, LookupWorker> workers = new ConcurrentHashMap<Integer, LookupWorker>();

	ThreadPoolExecutor threadPool;	
	
	CyclicBarrier barrier;

		
	
	public Lookup(int postnr, Database db, ThreadPoolExecutor threadPool) {
		this.postnr = postnr;
		this.db = db;
		this.threadPool = threadPool;
	}
	

	
	public void doLookup() throws BoundingBoxException {
		logger.info("Starting for postnr=" + postnr);
		
		Statistik stat = new Statistik();
		
		Constants consts = Constants.getInstance();
				
		long start1 = System.currentTimeMillis();		
		long start2 = 0;
		
		barrier = new CyclicBarrier(LookupMain.max_workers + 1);
		
		try {
			
			logger.info("Henter _ikke_ daekkede adresser i " + postnr);
			queue = db.hentIkkedaekkedeAdresserCache(postnr);
			if (queue.size() == 0) {
				logger.info("Fandt ikke nogen _ikke_ daekkede adresser i " + postnr);
				return;
			}
			
			BoundingBox bbox = db.getBoundingbox(postnr);
			bbox.validateBbox();
			
			logger.info("Bbox=" + bbox);
			bbox.adjustToMargin( consts.getKmMargin() );
			logger.info("Bbox Adjusted=" + bbox);
			
			logger.info("Henter daekkede adresser i " + postnr);
			daekkedeAdresser = db.hentDaekkedeAdresserCache(bbox);
			
			
			stat.postnr = postnr;
			stat.antalDaekkede = daekkedeAdresser.length;
			stat.antalIkkeDaekkede = queue.size();
			stat.totalDataset = stat.antalDaekkede * stat.antalIkkeDaekkede;
									
			
			logger.info("Starter beregning for " + postnr);
			start2 = System.currentTimeMillis();
						 								
			for (int i =0; i < LookupMain.max_workers; i++) {
				LookupWorker worker = new LookupWorker(i, this, barrier);
				threadPool.submit(worker);
			}
			
			barrier.await();
			
			db.saveBatch();//Save any unsaved rows
			
			
		} catch(Exception e) {
			logger.log(Level.WARNING, "Exception during lookup", e);
			
			if (e instanceof BoundingBoxException) {
				logger.severe( e.getMessage() );
				System.exit(1);
			}
			
		}
		long now = System.currentTimeMillis();
		
		stat.forbrugtTid = (now-start1);
		LookupMain.saveStatistics(stat);

		logger.info( stat.toString() );
		logger.info("Done! elapsed=" + (now-start1) + "/" +  (now-start2) + "  postnr=" + postnr);
	}
	
	
	// Getters and setters
		
	///////////////////////////
	public Database getDb() {
		return db;
	}



	public Adresse[] getDaekkedeAdresser() {
		return daekkedeAdresser;
	}

	public Queue<Adresse> getQueue() {
		return queue;
	}


}