Ôn tập: Mua hàng từ cửa hàng

using System.Collections.Generic;
using UnityEngine;
using UnityEngine.InputSystem;
using TMPro;

public class Shop : MonoBehaviour
{
    public ItemDatabase database;
    public TMP_Text itemText;
    public TMP_Text goldText;
    public int gold = 50;
    private int index;

    void Start()
    {
        Show();
    }

    void Update()
    {
        if (Keyboard.current.rightArrowKey.wasPressedThisFrame)
        {
            index = (index + 1) % database.items.Count;
            Show();
        }
        if (Keyboard.current.leftArrowKey.wasPressedThisFrame)
        {
            index = (index - 1 + database.items.Count) % database.items.Count;
            Show();
        }
        // Space: mua vật phẩm đã chọn
    }

    void Show()
    {
        ItemData item = database.items[index];
        itemText.text = item.itemName + ": " + item.price + " gold";
        goldText.text = "Gold: " + gold;
    }
}