1.12.2 How Do I Do Gun Reload?

I'm writing gun plugin for my BattleRoyale Server.
So, I don't know how to do reload in code. My current algorythm:
1. Check If we are already reloading (HashMap reload<Playername, Is On Reload>)
2. If we aren't reloading:
3. runtasktimer()
4. set item durability to 0 (Max Durablilty)

But it is not working properly.

Here is the code:

Code (Text):

public static void reload(Player player) {
        if(countAmmo(player, getGun(player.getItemInHand().getType())) >= getGun(player.getItemInHand().getType()).getMagazine()) {
            if(TLFortGuns.onReload.containsKey(player.getName())) {
                player.sendTitle("",ChatColor.RED + "Уже перезаряжаемся!");
            } else {
                TLFortGuns.onReload.put(player.getName(), true);
                Bukkit.getScheduler().runTaskTimer(TLFortGuns.getMainPlugin(), new Runnable() {
                    int time = getGun(player.getItemInHand().getType()).getReloadTime();
                    @Override
                    public void run() {
                        if (this.time == 0) {
                            if(player.getItemInHand().getDurability() == player.getItemInHand().getType().getMaxDurability() - 1) {
                                TLFortGuns.onReload.remove(player.getName());
                                player.getItemInHand().setDurability((short) 0);
                            }
                            return;
                        }
                        player.sendTitle("",ChatColor.RED + "Ждите");
                        this.time--;
                    }
                }, 0L, 1L);
            }
        } else {  
            player.sendTitle("",ChatColor.RED + "Закончились патроны!");
        }
    }

 

Uh oh, just a little bug. It was fixed, but only once it reloads gun with delay, as it should, but then - immediate reload

 

Umm, no. I think that is a problem.
How do I do this in code? I need an example