package dk.daoas.fulddaekning;

import java.io.File;
import java.io.FileReader;
import java.util.List;
import java.util.logging.FileHandler;
import java.util.logging.Logger;
import java.util.logging.SimpleFormatter;
import java.util.concurrent.*;

public class LookupMain {


	static final String CONFIG_FILENAME = "fulddaekning.properties";
	
	static boolean rename_tables;
	static SafeProperties conf;
	
	static int max_workers;
	static boolean verbose;
	
	static String distributor;

	final static Logger logger = Logger.getLogger( LookupMain.class.toString() );
	
	
	static Statistik flestDaekkede = new Statistik();
	static Statistik flestIkkeDaekkede = new Statistik();
	static Statistik mestBrugteTid = new Statistik();
	static Statistik stoersteDataset = new Statistik();
	
	static Adresse[] alleDaekkedeAdresser;

	static ThreadPoolExecutor threadPool;

	private static void setupThreadPool() {
		threadPool = (ThreadPoolExecutor) Executors.newFixedThreadPool(max_workers, new ThreadFactory() {
			@Override
			public Thread newThread(Runnable r) {
				return new Thread(r, "lookupWorker");
			}	
		});
	}
	
	
	public static void main(String[] args) throws Exception {
		
		//Setup j.u.l Logger
		Logger root = Logger.getLogger("");
		FileHandler fhandler = new FileHandler("fulddaekning.log"); // Ingen max størrelse, ingen rotation og ingen append
		fhandler.setFormatter( new SimpleFormatter() );
		root.addHandler( fhandler );
		
		
		
		
		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") );
		if (max_workers <= 0) {
			logger.info("!!! AUTO-DETECT MAX_WORKERS !!!");
			int cores = Runtime.getRuntime().availableProcessors();
			cores -= 1;//Efterlad 1 core/cpu i reserve til systemet
			
			max_workers = Math.max(1, cores); //Dog skal der som minimum være 1 core til beregning 
			
		}
		logger.info("Starting with MAX_WORKERS:" + max_workers);
		setupThreadPool();
		
		
		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);
		
		distributor = conf.getSafeProperty("DISTRIBUTOR");
		distributor = distributor.toUpperCase();
		logger.info("Starting for DISTRIBUTOR:" + distributor);
		
		Constants.init(distributor);
		Constants consts = Constants.getInstance();
		
		Database db = new Database(conf);
		
		

		
		boolean testRun= false;
		
		
		long start = System.currentTimeMillis();
		
		if (testRun == false) {
		
			logger.info("Finder postnumre");
			List<String> postnumre = db.hentPostnumre();
			
			// Først validerer vi BBox på alle postnummre, for at undgå fuldt stop midt i beregningen
			for(String postnr : postnumre) { //
				logger.info("Validerer BBox for " + postnr);
				BoundingBox bbox = db.getBoundingbox(postnr);
				bbox.validateBbox();
			}
			
			if (consts.doExtendedLookup()) {
				logger.info("Henter alle daekkede adresser");
				alleDaekkedeAdresser = db.hentAlleDaekkedeAdresser();
				logger.info( "AlleDaekkedeAdresser.length=" + alleDaekkedeAdresser.length);
			}
			
			
			//pre-check er ok - reset tmp tabel og start søgningen
			db.resetResultTable();
			
			for(String postnr : postnumre) {
				Lookup lookup = new Lookup(postnr, db, threadPool);
				lookup.doLookup();			
			}
			
			if (rename_tables) {
				db.renameResultTables();
			} else {
				logger.info( "Rename tables is disabled !!!" );
			}
			
	

		} else {
			/// Test
			db.resetResultTable();
			
			if (consts.doExtendedLookup()) {
				alleDaekkedeAdresser = db.hentAlleDaekkedeAdresser();
				logger.info( "AlleDaekkedeAdresser.length=" + alleDaekkedeAdresser.length);
			}
			
			Lookup lookup = new Lookup("458x", db, threadPool);
			lookup.doLookup();								
		}
		
		long now = System.currentTimeMillis();
		long elapsed = now - start ;
		
		logger.info("Mest brugte tid: " + mestBrugteTid);
		logger.info("Flest Ikke-dækkede, " + flestIkkeDaekkede);
		logger.info("Flest Dækkede, " + flestDaekkede);
		logger.info("Største Dataset, " + stoersteDataset);		
		logger.info("Fuld load done : " + formatMilliSeconds(elapsed) );
	}

	
	public static void saveStatistics(Statistik stat) {
		if (stat.antalDaekkede > flestDaekkede.antalDaekkede) {
			flestDaekkede = stat;
		}
		if (stat.antalIkkeDaekkede > flestIkkeDaekkede.antalIkkeDaekkede) {
			flestIkkeDaekkede = stat;
		}
		
		if (stat.totalDataset > mestBrugteTid.totalDataset) {
			stoersteDataset = stat;
		}
		
		if (stat.forbrugtTid > mestBrugteTid.forbrugtTid) {
			mestBrugteTid = stat;
		}
	}

	static String formatMilliSeconds(long milliseconds) {
		int mseconds = (int) milliseconds % 1000;
		int seconds = (int) (milliseconds / 1000) % 60 ;
		int minutes = (int) ((milliseconds / (1000*60)) % 60);
		int hours   = (int) ((milliseconds / (1000*60*60)) % 24);
		
		return String.format("%02d:%02d:%02d.%03d", hours, minutes, seconds, mseconds);
	}	
}