MissileWars/src/de/steamwar/misslewars/countdowns/ItemCountdown.java

package de.steamwar.misslewars.countdowns;

import de.steamwar.misslewars.*;
import de.steamwar.misslewars.items.SpecialItem;
import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.scheduler.BukkitTask;

import java.util.EnumSet;

public class ItemCountdown extends StateDependent {

	private BukkitTask task;

	public ItemCountdown() {
		super(EnumSet.of(FightState.FIGHTING));
	}

	private void run(){
		ItemStack item = SpecialItem.getRandomItem();
		giveTeamItem(MissileWars.getBlueTeam(), item);
		giveTeamItem(MissileWars.getRedTeam(), item);
	}

	private void giveTeamItem(MWTeam team, ItemStack item){
		for(Player p : team.getPlayers()){
			givePlayerItem(p, item);
		}
	}

	private void givePlayerItem(Player p, ItemStack item){
		Inventory inventory = p.getInventory();
		for (int i = 0; i <= 35; i++) { //35 is the last normal inventory slot
			ItemStack itemStack = inventory.getItem(i);
			if (itemStack != null && itemStack.isSimilar(item) && itemStack.getAmount() != itemStack.getMaxStackSize()) {
				itemStack.setAmount(itemStack.getAmount() + item.getAmount());
				inventory.setItem(i, itemStack);
				p.updateInventory();
				return;
			}
		}

		for (int i = 0; i <= 35; i++) { //35 is the last normal inventory slot
			ItemStack itemStack = inventory.getItem(i);
			if (itemStack == null || itemStack.getType().equals(Material.AIR)) {
				inventory.setItem(i, item);
				p.updateInventory();
				return;
			}
		}
	}

	@Override
	public void enable() {
		task = Bukkit.getScheduler().runTaskTimer(MissileWars.getPlugin(), this::run, Config.ItemTime, 0);
	}

	@Override
	public void disable() {
		if(!task.isCancelled())
			task.cancel();
	}
}