EerieVillage/Assets/Scripts/Progression/LevelUpManager.cs

using System.Collections.Generic;
using UnityEngine;
using Platformer.Mechanics;
using EerieVillage.MyUI;
using EerieVillage.Skills;

namespace EerieVillage.Progression
{
    /// <summary>
    /// 레벨업 발화 시 일시정지 + UI 호출 + 카드 선택 결과 수령.
    /// PlayerProgression.OnLevelUp 구독.
    ///
    /// Phase 2-D 정정 (2026-05-09) — SkillRuntimeFactory.RandomDraw3() + PlayerSkillInventory.AddSkillByCardId() 정식 통합.
    /// Phase 2-B 영역 (2026-05-08) — SkillSelectionUI 정식 통합.
    /// </summary>
    public class LevelUpManager : MonoBehaviour
    {
        public static LevelUpManager Instance { get; private set; }

        [SerializeField] SkillSelectionUI _ui;

        PlayerController _player;
        PlayerProgression _progression;
        bool _isLevelUpActive = false;

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

        void Start()
        {
            _player = Object.FindFirstObjectByType<PlayerController>();
            if (_player == null)
            {
                Debug.LogWarning("[LevelUpManager] PlayerController 영역 부재 — Start 시점 참조 X");
                return;
            }

            _progression = _player.GetComponent<PlayerProgression>();
            if (_progression == null)
            {
                _progression = _player.gameObject.AddComponent<PlayerProgression>();
            }
            _progression.OnLevelUp += HandleLevelUp;
        }

        void OnDestroy()
        {
            if (_progression != null) _progression.OnLevelUp -= HandleLevelUp;
            if (Instance == this) Instance = null;
        }

        void HandleLevelUp(int newLevel)
        {
            Debug.Log($"[LevelUpManager] HandleLevelUp 호출 Lv.{newLevel} _ui={(_ui == null ? "NULL" : _ui.name)}");
            if (_isLevelUpActive) return;
            _isLevelUpActive = true;

            // 일시정지 + 입력 차단
            Time.timeScale = 0f;
            if (_player != null) _player.controlEnabled = false;

            // Phase 2-D — SkillRuntimeFactory.RandomDraw3()로 카드 3장 추출
            List<ActiveSkillData> cards = SkillRuntimeFactory.RandomDraw3();
            Debug.Log($"[LevelUpManager] cards.Count={cards.Count}");

            // Phase 2-B/D 통합 — SkillSelectionUI 정식 호출
            if (_ui != null)
            {
                Debug.Log($"[LevelUpManager] _ui.Show 호출 → SkillSelectionCanvas 활성 의도");
                _ui.Show(cards, newLevel, HandleCardConfirmed);
            }
            else
            {
                // UI 부재 fallback
                Debug.LogWarning($"[LevelUpManager] SkillSelectionUI 부재 — Lv.{newLevel} 카드 {cards.Count}장 자동 확정");
                HandleCardConfirmed(cards.Count > 0 ? cards[0] : null);
            }
        }

        void HandleCardConfirmed(ActiveSkillData selected)
        {
            // UI 닫기
            if (_ui != null) _ui.Hide();

            // Phase 2-D — PlayerSkillInventory.AddSkillByCardId() 정식 호출
            if (selected != null)
            {
                var inventory = _player != null
                    ? _player.GetComponent<PlayerSkillInventory>()
                    : null;

                if (inventory != null)
                {
                    bool ok = inventory.AddSkillByCardId(selected.CardId);
                    Debug.Log($"[LevelUpManager] 카드 확정 — {selected.DisplayName} (AddSkillByCardId={ok})");
                }
                else
                {
                    Debug.LogWarning("[LevelUpManager] PlayerSkillInventory 영역 부재 — 스킬 등록 X (PlayerController에 컴포넌트 확인 필요)");
                    Debug.Log($"[LevelUpManager] 카드 확정 — {selected.DisplayName} (인벤토리 X)");
                }
            }
            else
            {
                Debug.Log("[LevelUpManager] 카드 확정 — NONE");
            }

            // 일시정지 해제 + 입력 복원
            Time.timeScale = 1f;
            if (_player != null) _player.controlEnabled = true;
            _isLevelUpActive = false;
        }
    }
}