using System.Collections.Generic;
using UnityEngine;
using TMPro;
using DG.Tweening;

public class DamageTextPool : MonoBehaviour
{
    public static DamageTextPool Instance { get; private set; }

    [SerializeField] private GameObject textPrefab;
    [SerializeField] private int poolSize = 50;
    private Queue<TextMeshPro> _pool = new Queue<TextMeshPro>();

    private void Awake()
    {
        if (Instance != null)
        {
            Destroy(gameObject);
            return;
        }
        Instance = this;
        InitializePool();
    }

    private void InitializePool()
    {
        for (int i = 0; i < poolSize; i++)
        {
            var obj = Instantiate(textPrefab, transform);
            var tmp = obj.GetComponent<TextMeshPro>();
            obj.SetActive(false);
            _pool.Enqueue(tmp);
        }
    }

    public void Show(Vector3 worldPos, int value, DamageType type = DamageType.Normal)
    {
        if (_pool.Count == 0)
            InitializePool(); // mở rộng nếu thiếu

        var tmp = _pool.Dequeue();
        tmp.gameObject.SetActive(true);

        tmp.text = type switch
        {
            DamageType.Critical => $"CRIT -{value}",
            DamageType.Heal => $"+{value}",
            DamageType.Miss => "MISS",
            DamageType.Immune => "IMMUNE",
            _ => $"-{value}"
        };

        tmp.color = type switch
        {
            DamageType.Critical => Color.yellow,
            DamageType.Heal => Color.green,
            DamageType.Miss => Color.gray,
            DamageType.Immune => Color.white,
            _ => Color.red
        };

        tmp.transform.position = worldPos + Vector3.up * 2f;
        tmp.transform.localScale = Vector3.one;

        // Animation bay lên rồi fade ra
        var seq = DOTween.Sequence();
        seq.Append(tmp.transform.DOMoveY(worldPos.y + 3f, 1f).SetEase(Ease.OutQuad));
        seq.Join(tmp.DOFade(0, 1f));
        seq.OnComplete(() =>
        {
            tmp.alpha = 1;
            tmp.gameObject.SetActive(false);
            _pool.Enqueue(tmp);
        });
    }
}

/// <summary>
/// Các loại damage để đổi màu & text
/// </summary>
public enum DamageType
{
    Normal,
    Critical,
    Heal,
    Miss,
    Immune
}