class DMChests {
    private LinkedList<Chest> openedChests = new LinkedList<>();
    private LinkedList<Chest> closedChests;

    private Chest initialChest;

    public DMChests(LinkedList<Chest> closedChests) {
        this.closedChests = closedChests;
        this.initialChest = closedChests.getFirst();
    }

    public int getChestsOpened() {
        return openedChests.size();
    }

    public void openChest(Player player) {
        if(canOpenChest(player)) {
            Chest chest = closedChests.removeFirst();
            chest.open(player);
            openedChests.addLast(chest);
        }
    }

    private boolean canOpenChest(Player player) {
        return player.getRogueLvl() > 30 && initialChest.isOpened() && closedChests.size() > 0;
    }
}