Apocalypse

package Apocalypse;

import java.util.HashMap;

import org.bukkit.Bukkit;
import org.bukkit.GameMode;
import org.bukkit.Location;
import org.bukkit.block.Block;
import org.bukkit.entity.Player;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin{


    public static Plugin plugin;
    public static String prefix = "Apocalypse";


    //## PLUGIN ACTIVATION ##
    @Override
    public void onEnable() {
        super.onEnable();

        System.out.println("["+ prefix +"] ##############################");
        System.out.println("["+ prefix +"]      Plugin made by Rail");
        System.out.println("["+ prefix +"] ------------------------------");
        System.out.println("["+ prefix +"] <> Activating Plugin <>");
        System.out.println("["+ prefix +"] Starting System..");

        plugin = this;
        repeatingTask();

        System.out.println("["+ prefix +"] - Ok!");
        System.out.println("["+ prefix +"] ##############################");
    }
    //## PLUGIN DEACTIVATION ##
    @Override
    public void onDisable() {
        System.out.println("["+ prefix +"] - Plugin deactivated!");
    }


    //## Plugin GET Method ##
    public static Plugin getPlugin() {
        return plugin;
    }


    static int burnInSeconds = 5;
    static int burnAfterSeconds = 3;
    static HashMap<Player, Integer> timerList = new HashMap<>();

    public void repeatingTask(){

        Bukkit.getServer().getScheduler().scheduleSyncRepeatingTask(this, new Runnable()
        {
            @Override
            public void run()                                   // This runs every 5 Ticks (~ 4 Times /second)
            {
                for(Player p : Bukkit.getOnlinePlayers()){      // Cycle thru every Player Online
                    if(p.getGameMode() != GameMode.CREATIVE && p.getGameMode() != GameMode.SPECTATOR){  // Filter Creative & Spectator Players

                        if(timerList.get(p) != null){               // Catch Errors
                            int timer = timerList.get(p);
                            boolean isUnderBlock = isUnderBlock(p);

                            if(!isUnderBlock){                      // Player is not under a Block

                                if(timer < 0){                  // Set timer (to 'burnAfterSeconds')

                                    timer = burnAfterSeconds*4;
                                    timerList.put(p, timer);

                                }else if(timer > 0){            // Run timer

                                    timer--;
                                    timerList.put(p, timer);

                                }else if(timer == 0){           // Timer has reached 0, BURN!! (for 'burnInSeconds')

                                    p.setFireTicks(burnInSeconds*20);

                                }

                            }else{                                  // Player is under a Block

                                if(timer >= 0){

                                    timer = -1;                     // Stop & Reset Timer
                                    timerList.put(p, timer);

                                }


                            }

                        }else{

                            timerList.put(p, -1);                   // Put new Player in List (default: timer off)

                        }
                    }
                }

            }
        }, 20, 5);

    }


    public boolean isUnderBlock(Player p){

        Location loc = p.getLocation();
        Block highestBlock = loc.getWorld().getHighestBlockAt(loc);
        Location locBlock = highestBlock.getLocation();

        double y = loc.getY();
        double yBlock = locBlock.getY();

        if(y < yBlock){

            return true;

        }else{

            return false;

        }
    }
}