package de.mrbesen.youtubecrawler;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;

import org.apache.log4j.Logger;

import de.mrbesen.telegram.TelegramAPI;
import de.mrbesen.telegram.commands.CommandHandler;
import de.mrbesen.telegram.event.EventHandler;
import de.mrbesen.telegram.event.EventListener;
import de.mrbesen.telegram.event.events.UserSendMessageEvent;
import de.mrbesen.telegram.objects.TUser;

public class Main implements CommandHandler, EventListener{

	private ArrayList<String> admins = new ArrayList<>();//usernames of admins
	private String adminstr = null;
	private long setadminstr = -1;
	private static String abc = "abcdefghijklmnopqrstuvwxyz";
	private Logger log = Logger.getLogger(this.getClass().getName());
	private TelegramAPI tapi;
	private Thread mainthread;
	private static Main main;

	public static Main getMain() {
		return main;
	}

	public static void main(String[] args) {
		main = new Main();
		main.run();
	}

	private Crawler cra;

	private void run() {
		mainthread = Thread.currentThread();

		//init Logger
		new Log(); // init logging, set format etc
		Logger log = Logger.getLogger(Main.class.getName());

		//loading config
		new Config(new File("crawl.conf"));

		//starting crawler
		cra = new Crawler();
		Thread t = new Thread(cra, "Crawler");
		t.start();

		//starting BOT API
		tapi = new TelegramAPI(Config.prop.getProperty("telegramapi.key"));
		tapi.getCommandManager().registerCommand("random", this);
		tapi.getCommandManager().registerCommand("admin", this);
		tapi.getCommandManager().registerCommand("stats", this);
		tapi.getCommandManager().registerCommand("stop", this);
		tapi.getEventManager().registerEvent(this);
		tapi.setHelpText("Send the command /random to get a random video.");
		tapi.setUpdateInterval(2000);
		tapi.start();

		//load admins
		Log.l.info("Loading admins.");
		try {
			Scanner scan = new Scanner(new File("admins"));
			while(scan.hasNext()) {
				String line = scan.nextLine().trim();
				if(!line.isEmpty()) {
					admins.add(line);
				}
			}
			scan.close();
		} catch (IOException | NumberFormatException | ArrayIndexOutOfBoundsException e) {
			e.printStackTrace();
		}
		//CLI
		Scanner s = new Scanner(System.in);
		String in;
		while((in= s.nextLine()) != null && t.isAlive()) {
			if(in.equalsIgnoreCase("stop")) {
				stop();
				break;
			} else if(in.equalsIgnoreCase("add")) {
				log.info("please enter ytid:");
				String id = s.nextLine().trim();
				if(id.length() > 9 && id.length() < 13) {
					cra.addtoCrawl(id);
					log.info("added.");
				}
			} else if(in.equalsIgnoreCase("stats")) {
				log.info("Getting Stats");
				for(String line : cra.getStats().split("\n")) {
					log.info(line);
				}
			}
		}
		s.close();
		log.info("Terminated.");
	}

	public void stop() {
		log.info("Stop.");
		cra.stop();
		log.info("cra stopped");
		try {
			Thread.sleep(100);
		} catch(InterruptedException e) {
			e.printStackTrace();
		}
		tapi.stop();
		log.info("tapi stopped");
		mainthread.interrupt();
	}

	@Override
	public boolean onCommand(TUser sender, String cmd, String[] args) {
		if(cmd.equals("random")) {
			String ytid = cra.getDB().getRandom();
			sender.sendMessage("https://youtube.com/watch?v=" + ytid);
			return true;
		} else if(cmd.equals("admin")) {
			if(admins.contains(sender.getName())) {
				sender.sendMessage("You are admin.");
				return true;
			} else {
				adminstr = getRandomStr(8);
				setadminstr = System.currentTimeMillis();
				log.info("Adminstr: " + adminstr);
			}
		} else if(cmd.equals("stats")) {
			if(admins.contains(sender.getName())) {
				sender.sendMessage(cra.getStats());
				return true;
			}
		} else if(cmd.equals("stop")) {
			if(admins.contains(sender.getName())) {
				stop();
				sender.sendMessage("Stop.");
				log.info("Stopped via Telegram by " + sender.getFirstName());
				return true;
			}
		}
		return false;
	}

	public void broadcastAdmin(String msg) {
		for(String admin : admins) {
			TUser adm = tapi.getUser(admin);
			if(adm != null)
				adm.sendMessage(msg);
		}
	}

	private String getRandomStr(int length) {
		Random rand = new Random();
		String out = "";
		for(int i = 0; i < length; i++) {
			out += abc.charAt(rand.nextInt(abc.length()));
		}
		return out;
	}

	@EventHandler
	public void onAdmin(UserSendMessageEvent e) {
		if(adminstr != null && setadminstr > 0) {
			if(e.getMessage() != null && (System.currentTimeMillis() - setadminstr) / 1000 < 60) {
				if(e.getMessage().getText() != null) {
					if(e.getMessage().getText().equals(adminstr)) {
						admins.add(e.getUser().getName());
						e.getMessage().reply("You are now Admin!");
						adminstr = null;
						setadminstr = -1;
						log.info(e.getUser().getID() + " " + e.getUser().getName() + " " + e.getUser().getFirstName() + " is now Admin!");
					}
				}
			}
		}
	}
}