package org.leolo.rail.nrd;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Hashtable;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.zip.GZIPInputStream;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.json.JSONObject;

public class FileLoader {

	private static Logger log = LogManager.getLogger(FileLoader.class);
	
	public static final Object SYNC_TOKEN = new Object();
	
	public static void main(String [] args) {
		new FileLoader().run();
	}
	
	public void run() {
		log.info("Process started");
		ConfigurationManager.getInstance().forEach((k,v)->{
			if(!((String)k).endsWith(".pwd")) {
				log.debug("{} -> {}", k, v);
			}else {
				log.debug("{} -> ****", k);
			}
		});
		if(DatabaseManager.getInstance().testPool()) {
			log.info("Successfully connected to the database");
		}
		if(!ConfigurationManager.getInstance().containsKey("file.path")) {
			log.fatal("Cannot find file path");
			System.exit(1);
		}
		InputStream fis = null;
		//TODO: get the file from Network Rail
		
		try {
			fis = new FileInputStream(ConfigurationManager.getInstance().getProperty("file.path"));
		}catch(IOException e) {
			log.fatal(e.getMessage(), e);
			System.exit(1);
		}
		DatabaseManager.getInstance().clear();
		try(
				GZIPInputStream gis = new GZIPInputStream(fis);
				BufferedReader br = new BufferedReader(new InputStreamReader(gis))
		){
			int count = 0;
			AssoicationHandler asso = new AssoicationHandler();
			TiplocHandler tiploc = new TiplocHandler();
			ScheduleHandler schedule = new ScheduleHandler();
			while(true) {
				String line = br.readLine();
				if(line==null) {
					break;
				}
				count++;
				if(asso.getQueueSize()+tiploc.getQueueSize()+schedule.getQueueSize() > Constants.MAX_QUEUE_SIZE) {
					synchronized(SYNC_TOKEN) {
						try {
							SYNC_TOKEN.wait();
						} catch (InterruptedException e) {
							log.error(e.getMessage(), e);
						}
					}
				}
				JSONObject obj = new JSONObject(line);
				String objectType = obj.keys().next();
				if("JsonTimetableV1".equals(objectType)) {
					
				}else if("JsonAssociationV1".equals(objectType)){
					asso.add(obj.getJSONObject("JsonAssociationV1"));
				}else if("TiplocV1".equals(objectType)){
					tiploc.add(obj.getJSONObject("TiplocV1"));
				}else if("JsonScheduleV1".equals(objectType)){
					schedule.add(obj.getJSONObject("JsonScheduleV1"));
				}else if("EOF".equals(objectType)){
					//Nothing to do
				}else {
					log.fatal("Unhandled type {}", objectType);
					System.exit(2);
				}
				
			}
			log.info("Total count : {}", count);
			asso.shutdownAndWait();
			tiploc.shutdownAndWait();
			schedule.shutdownAndWait();
		}catch(IOException e) {
			log.error(e.getMessage(), e);
			System.exit(1);
		}
		try {
			fis.close();
		}catch(IOException e) {
			log.fatal(e.getMessage(), e);
			System.exit(1);
		}
		DatabaseManager.getInstance().shutdown();
		log.info("Job finished!");
	}

}