using Core.Economy;
using TMPro;
using TowerDefense.Level;
using UnityEngine;

namespace TowerDefense.UI.HUD
{
    /// <summary>
    /// A class for controlling the displaying the currency
    /// </summary>
    public class EndlessCurrencyUI : MonoBehaviour
    {
        /// <summary>
        /// TextMeshPro对应的金币数据
        /// </summary>
        public TextMeshProUGUI DisplayText;

        protected Currency currency;

        private void Start()
        {
            if (EndlessLevelManager.instanceExists)
            {
                currency = EndlessLevelManager.instance.Currency;

                UpdateDisplay();
                currency.currencyChanged += UpdateDisplay;
            }
            else
                Debug.LogError("[UI] No EndlessLevelManager to get currency from");
        }

        /// <summary>
        /// Unsubscribe from events
        /// </summary>
        protected virtual void OnDestroy()
        {
            if (currency != null)
                currency.currencyChanged -= UpdateDisplay;
        }

        /// <summary>
        /// A method for updating the display based on the current currency
        /// </summary>
        protected void UpdateDisplay()
        {
            int current = currency.currentCurrency;
            //DisplayText.text = AddNumberSemi(current.ToString());
            DisplayText.text = current.ToString();

        }

        /// <summary>
        /// 在数字中加入逗号
        /// </summary>
        /// <param name="str"></param>
        protected string AddNumberSemi(string str)
        {
            int len = str.Length;
            for (int ipos = len - 3; ipos > 0; ipos -= 3)
            {
                str = str.Insert(ipos, ",");
            }
            return str;
        }
    }
}