package server;

import java.io.FileInputStream;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.security.KeyStore;
import java.text.DecimalFormat;
import java.util.logging.Logger;

import org.apache.mina.core.service.IoAcceptor;
import org.apache.mina.filter.ssl.SslFilter;
import org.apache.mina.transport.socket.nio.NioSocketAcceptor;

import server.database.DatabaseManager;
import server.database.MongoCopy;
import server.model.players.PlayerManager;
import server.networking.ConnectionHandler;
import server.util.ShutDownHook;
import server.util.SimpleTimer;
import server.util.SwConfig;
import server.SpecialWeaponConfig;
import server.model.players.Player;
import server.model.players.PlayerManager;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;

public class Server {


    public Server() {
        debugPercentFormat = new DecimalFormat("0.0#%");
        engineTimer = new SimpleTimer();
        debugTimer = new SimpleTimer();
        acceptor.setHandler(new ConnectionHandler());
    }



    public Server bind(int port) throws IOException {


        acceptor.bind(new InetSocketAddress(port));
        return this;
    }

    public static void main(String[] args) throws IOException {


        SpecialWeaponConfig.loadConfig(); // Load JSON
        startPeriodicCheck(); // Start timer

        try {
               if (args[0].contains("live")) {
                   Config.LIVE_SERVER = true;
               }
           } catch (Exception e) {
           }
        try {
            new Server().bind(PORT).start();
        } catch (Exception e) {
            e.printStackTrace();
        }

        Thread savePlayers = new Thread(() -> gameEngine.destruct());
        Runtime.getRuntime().addShutdownHook(savePlayers);

        gameEngine = new GameEngine();
        gameEngine.init();



        System.out.println("Listening for connections on port " + Config.SERVER_PORT + "...");

        try {
            while (!shutdownServer) {

                long startTime = System.currentTimeMillis();

                engineTimer.reset();

                if (updateTicks > 0)
                    updateTicks--;

                if (updateTicks == 0) {
                    shutdownServer = true;
                }

                gameEngine.update();

                cycleTime = engineTimer.elapsed();
                sleepTime = Config.SERVER_TICK_RATE - cycleTime;
                totalCycleTime += cycleTime;
                cycles++;
                debug();

                long timeElapsed = System.currentTimeMillis() - startTime;
                if (timeElapsed < 100) {
                    Thread.sleep(Config.SERVER_TICK_RATE - timeElapsed);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            gameEngine.destruct();
        }
    }

    private static long cycleTime, cycles, totalCycleTime, sleepTime;
    private static SimpleTimer engineTimer, debugTimer;
    private static DecimalFormat debugPercentFormat;

    private static void debug() {
        if (debugTimer.elapsed() > 100*1000) {
            long averageCycleTime = totalCycleTime / cycles;
            System.out.println("Average Cycle Time: " + averageCycleTime + "ms");
            double engineLoad = ((double) averageCycleTime / (double) Config.SERVER_TICK_RATE);
            System.out.println("Players online: " + PlayerManager.getInstance().getPlayerCount()+ ", engine load: "+ debugPercentFormat.format(engineLoad));
            totalCycleTime = 0;
            cycles = 0;
            System.gc();
            debugTimer.reset();
        }
    }

    public void start() {
        logger.info("Starting server version "+Config.CLIENT_VERSION);
    }
    
    private static void startPeriodicCheck() {
        new Thread(() -> {
            while (true) {
                try {
                    Thread.sleep(30000); // 30 seconds
                    for (Player player : PlayerManager.getInstance().players) {
                        if (player != null) {
                            player.currentWeaponBonus = SpecialWeaponConfig.getDamageMultiplier(
                                player.getEquipment().getPlayerWeapon(), player.skin);
                            // Cache for applyDamage
                        }
                    }
                } catch (InterruptedException e) {
                    System.err.println("Periodic check error: " + e);
                }
            }
        }).start();
    }

    //provide logging details
    public static final Logger logger = Logger.getLogger(Server.class.getName());

    //the port the server runs on
    private static final int PORT = Config.SERVER_PORT;

    //Socket acceptor
    private final IoAcceptor acceptor = new NioSocketAcceptor();

    //main gameengine instance
    public static GameEngine gameEngine;

    //count down for updating server
    public static int updateTicks = -1;

    //shut down when set to true
    public static boolean shutdownServer = false;
}