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

public class PlayerLevelSystem : MonoBehaviour
{
    [Header("레벨")]
    public int level = 1;
    public int currentExp = 0;

    [Header("레벨업 경험치 테이블")]
    [Tooltip("index 0 = Lv1 → Lv2 필요 경험치")]
    [SerializeField] private int[] expTable;

    [Header("UI")]
    [SerializeField] private Image expFillImage;
    [SerializeField] private TextMeshProUGUI expText;
    [SerializeField] private TextMeshProUGUI levelText; // ⭐ 추가

    public static System.Action OnLevelUp;

    private int RequiredExp
    {
        get
        {
            int index = level - 1;

            if (index >= expTable.Length)
                return expTable[expTable.Length - 1];

            return expTable[index];
        }
    }

    private void OnEnable()
    {
        MonsterClass.OnMonsterKilled += GainExp;
        UpdateExpUI();
    }

    private void OnDisable()
    {
        MonsterClass.OnMonsterKilled -= GainExp;
    }

    void GainExp(int amount)
    {
        Debug.Log($"몬스터 처치! 얻은 경험치: {amount}");
        currentExp += amount;

        while (currentExp >= RequiredExp)
        {
            Debug.Log("레벨업 조건 달성! Show 호출 준비");
            currentExp -= RequiredExp;
            LevelUp();
        }

        UpdateExpUI();
    }

    void LevelUp()
    {
        if (level >= expTable.Length + 1)
        {
            currentExp = 0;
            return;
        }

        level++;
        Debug.Log($"🎉 레벨 업! 현재 레벨: {level}");

        OnLevelUp?.Invoke(); // ⭐ 레벨업 알림
    }

    void UpdateExpUI()
    {
        float fill = (float)currentExp / RequiredExp;
        expFillImage.fillAmount = fill;

        expText.text = $"{currentExp} / {RequiredExp}";
        levelText.text = $"Lv. {level}"; // ⭐ 레벨 표시
    }
}