using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class LevelUpUIManager : MonoBehaviour
{
    [SerializeField] private GameObject panel;
    [SerializeField] private CardUI[] cardPrefabs;
    [SerializeField] private Transform cardParent;
    [SerializeField] private List<CardData> cardPool;

    private void OnEnable()
    {
        PlayerLevelSystem.OnLevelUp += Show;
    }

    private void OnDisable()
    {
        PlayerLevelSystem.OnLevelUp -= Show;
    }

    void Show()
    {
        panel.SetActive(true);
        Time.timeScale = 0f;

        foreach (Transform child in cardParent)
            Destroy(child.gameObject);

        int slotCount = 2;

        // ===============================
        // 🔒 방어 코드
        // ===============================
        if (cardPool.Count == 0)
        {
            Debug.LogWarning("cardPool이 비어 있습니다.");
            return;
        }

        if (cardPrefabs.Length < slotCount)
        {
            Debug.LogError("cardPrefabs 개수가 slotCount보다 적습니다.");
            return;
        }

        // ===============================
        // 카드 데이터 선택
        // ===============================
        List<CardData> selectedCards = new List<CardData>();

        if (cardPool.Count >= slotCount)
        {
            List<CardData> tempCardPool = new List<CardData>(cardPool);

            for (int i = 0; i < slotCount; i++)
            {
                int index = Random.Range(0, tempCardPool.Count);
                selectedCards.Add(tempCardPool[index]);
                tempCardPool.RemoveAt(index);
            }
        }
        else
        {
            // ⭐ 카드 부족하면 순환
            for (int i = 0; i < slotCount; i++)
            {
                selectedCards.Add(cardPool[i % cardPool.Count]);
            }
        }

        // ===============================
        // ⭐ 카드 프리팹 중복 제거
        // ===============================
        List<CardUI> tempPrefabs = new List<CardUI>(cardPrefabs);

        for (int i = 0; i < slotCount; i++)
        {
            int prefabIndex = Random.Range(0, tempPrefabs.Count);
            CardUI prefab = tempPrefabs[prefabIndex];
            tempPrefabs.RemoveAt(prefabIndex);

            CardUI ui = Instantiate(prefab, cardParent);
            ui.Setup(selectedCards[i], this);
        }
    }

    public void Close()
    {
        Time.timeScale = 1f;
        panel.SetActive(false);
    }
}