package dk.daoas.fulddaekning;

import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Queue;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;

import dk.daoas.fulddaekning.BoundingBox.BoundingBoxException;

public class Lookup {

	static final String CONFIG_FILENAME = "fulddaekning.properties";

	static int max_workers;
	static boolean verbose;
	
	static boolean rename_tables;
	
	static SafeProperties conf;
	static Logger logger = Logger.getLogger( Lookup.class.toString() );
	
	int postnr;
	Database db;
		
	ArrayList<Adresse> daekkedeAdresser;
	Queue<Adresse> queue;
	
	Map<Integer, LookupWorker> workers = new ConcurrentHashMap<Integer, LookupWorker>();

	
	static Statistik flestDaekkede = new Statistik();
	static Statistik flestIkkeDaekkede = new Statistik();
	
	
	static class Statistik {
		int postnr;
		int antalDaekkede = 0;
		int antalIkkeDaekkede = 0;
		
		@Override
		public String toString() {
			return "postnr=" + postnr + " antalIkkeDaekkede=" + antalIkkeDaekkede + " antalDaekkede="  + antalDaekkede;
		}
	}
	
	
	public Lookup(int postnr, Database db) {
		this.postnr = postnr;
		this.db = db;
	}
	
	public static void saveStatistics(Statistik stat) {
		if (stat.antalDaekkede > flestDaekkede.antalDaekkede) {
			flestDaekkede = stat;
		}
		if (stat.antalIkkeDaekkede > flestIkkeDaekkede.antalIkkeDaekkede) {
			flestIkkeDaekkede = stat;
		}		
	}
	
	public void doLookup() throws BoundingBoxException {
		logger.info("Starting for postnr=" + postnr);
		
		Statistik stat = new Statistik();
				
		long start1 = System.currentTimeMillis();		
		long start2 = 0;
		
		try {
			BoundingBox bbox = db.getBoundingbox(postnr);
			bbox.validateBbox();
			
			logger.info("Bbox=" + bbox);
			bbox.adjustToMargin();
			logger.info("Bbox Adjusted=" + bbox);
			
			logger.info("Henter daekkede adresser i " + postnr);
			daekkedeAdresser = db.hentDaekkedeAdresser(bbox);
			
			logger.info("Henter _ikke_ daekkede adresser i " + postnr);
			queue = db.hentIkkedaekkedeAdresser(postnr);
			
			stat.postnr = postnr;
			stat.antalDaekkede = daekkedeAdresser.size();
			stat.antalIkkeDaekkede = queue.size();
			
			saveStatistics(stat);
						
			
			logger.info("Starter beregning for " + postnr);
			start2 = System.currentTimeMillis();
						 								
			for (int i =0; i<max_workers; i++) {
				LookupWorker worker = new LookupWorker(i, this);
				Thread t = new Thread(worker);
				t.start();
				
				workers.put(i, worker);
			}
			
			while (workers.size() > 0) {
				Thread.sleep(10);//wait for worker threads
			}
			
			
		} 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();
		

		logger.info( stat.toString() );
		logger.info("Done! elapsed=" + (now-start1) + "/" +  (now-start2) + "  postnr=" + postnr);
	}
	
	public void shutdownWorker(int workerid) {
		logger.info("Shutting down worker: " + workerid);
		workers.remove(workerid);
	}
	
	// Getters and setters
		
	///////////////////////////
	public Database getDb() {
		return db;
	}



	public ArrayList<Adresse> getDaekkedeAdresser() {
		return daekkedeAdresser;
	}

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


	
	
	
	
	/////////////////////////////
	// Static functions



	
	public static void main(String[] args) throws Exception {
		
		File confFile = new File( CONFIG_FILENAME );
		if (! confFile.exists() ) {
			logger.warning("Config file not found: " + CONFIG_FILENAME);
			System.exit(1);
		}
				
		conf = new SafeProperties();
		conf.load( new FileReader(confFile) );
		
		max_workers = Integer.parseInt( conf.getSafeProperty("MAX_WORKERS") );
		logger.info("Starting with MAX_WORKERS:" + max_workers);
		
		verbose = Boolean.parseBoolean( conf.getSafeProperty("VERBOSE") );
		logger.info("Starting with VERBOSE:" + verbose);
		
		rename_tables = Boolean.parseBoolean( conf.getSafeProperty("RENAMETABLES") );
		logger.info("Starting with RENAMETABLES:" + rename_tables);
		
		Database db = new Database(conf);
		
		db.resetResultTable();

		
		
		
		
		long start = System.currentTimeMillis();
		
		logger.info("Finder postnumre");
		List<Integer> postnumre = db.hentPostnumre();
		
		for(Integer postnr : postnumre) {
			Lookup lookup = new Lookup(postnr, db);
			lookup.doLookup();			
		}
		
		if (rename_tables) {
			db.renameResultTables();
		} else {
			logger.info( "Rename tables is disabled !!!" );
		}
		
		long now = System.currentTimeMillis();

		logger.info("Flest Ikke-dækkede, " + flestIkkeDaekkede);
		logger.info("Flest Dækkede, " + flestDaekkede);
		logger.info("Fuld load done : " + (now-start) );

		
		
		//Lookup lookup = new Lookup(7400, db);
		//lookup.doLookup();		
	}
		
}