package io.github.warren1001.slowregen;

import java.util.ArrayList;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityRegainHealthEvent;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scheduler.BukkitRunnable;
import org.bukkit.scheduler.BukkitTask;

public final class Main extends JavaPlugin implements Listener {

    private boolean on = true;
    private BukkitTask task;

    @Override
    public final void onEnable() {
        getConfig().addDefault("delay-in-seconds", 6);
        getConfig().addDefault("no-permission-msg", "You do not have the permissions to use this command.");
        getConfig().addDefault("command-permission", "sr.use");
        getConfig().options().copyDefaults();
        saveConfig();
        getServer().getPluginManager().registerEvents(this, this);
        startTask();
    }

    @Override
    public final boolean onCommand(final CommandSender sender, final Command cmd, final String label, final String[] args) {
        if(cmd.getName().equalsIgnoreCase("sr")) {
            if(!sender.hasPermission(getConfig().getString("command-permission"))) {
                sender.sendMessage(ChatColor.translateAlternateColorCodes('&', getConfig().getString("no-permission-msg")));
                return true;
            }
            if(args.length < 1) return false;
            if(args[0].equalsIgnoreCase("delay")) {
                int delay = getConfig().getInt("delay-in-seconds");
                if(args.length < 2) sender.sendMessage("The delay is " + delay + " " + (delay == 1 ? "second" : "seconds") + ".");
                else {
                    try {
                        delay = Integer.parseInt(args[1]);
                        getConfig().set("delay-in-seconds", delay);
                        startTask();
                        sender.sendMessage("Set the delay to " + delay + " " + (delay == 1 ? "second" : "seconds") + ".");
                    }
                    catch(NumberFormatException e) {
                        sender.sendMessage(args[1] + " is not a number!");
                    }
                }
            }
            else if(args[0].equalsIgnoreCase("reload")) {
                reloadConfig();
                startTask();
                sender.sendMessage("Configuration reloaded.");
            }
            else if(args[0].equalsIgnoreCase("toggle")) {
                if(on) {
                    on = false;
                    if(task != null) task.cancel();
                    sender.sendMessage("The timer is now off!");
                }
                else {
                    on = true;
                    startTask();
                    sender.sendMessage("The timer is now on!");
                }
            }
        }
        return true;
    }

    @EventHandler
    public final void ERHE(final EntityRegainHealthEvent event) {
        if(event.getEntity() instanceof Player && on) event.setCancelled(true);
    }

    public final void startTask() {
        if(task != null) task.cancel();
        task = new BukkitRunnable() {
            @Override
            public void run() {
                for(final Player player : new ArrayList<>(getServer().getOnlinePlayers())) {
                    final double health = player.getHealth();
                    if(health > 0.0 && health < player.getMaxHealth()) player.setHealth(health + 1);
                }
            }
        }.runTaskTimer(this, 0L, getConfig().getInt("delay-in-seconds", 6) * 20L);
    }

}