using UnityEngine;
using System;

public class ObsessionSystem : MonoBehaviour
{
    public static ObsessionSystem instance;

    [Header("생존 시간 기록")]
    private float survivalTimer = 0f;
    private bool isRunActive = false;

    [SerializeField] private int currentXP = 0;
    [SerializeField] private int currentLevel = 1;
    [SerializeField] private int[] xpRequirements = { 100, 300, 500, 800, 1200 };

    [SerializeField] private int currentRunXP = 0;
    [SerializeField] private int clearedRoomsThisRun = 0;

    [Header("XP 바구니들")]
    [SerializeField] private int runMobKillXP = 0;
    [SerializeField] private int runStageClearXP = 0;
    [SerializeField] private int runBossKillXP = 0;
    [SerializeField] private int runPerfectClearXP = 0;

    private void Awake()
    {
        if (instance == null) { instance = this; DontDestroyOnLoad(gameObject); }
        else { Destroy(gameObject); }
    }

    private void Start()
    {
        LoadData();
        ResetRunData();
    }

    private void Update()
    {
        if (isRunActive) survivalTimer += Time.deltaTime;
    }

    public void ResetRunData()
    {
        currentRunXP = 0;
        clearedRoomsThisRun = 0;
        runMobKillXP = 0;
        runStageClearXP = 0;
        runBossKillXP = 0;
        runPerfectClearXP = 0;
        survivalTimer = 0f;
        isRunActive = true;
    }

    // ─── 런 XP 획득 함수들 ───
    public void AddRunXP(int amount) { currentRunXP += amount; runMobKillXP += amount; }

    // RoomManager.cs 에러 해결용 함수들
    public void NotifyRoomCleared() { clearedRoomsThisRun++; }
    public void AddStageClearXP(int amount) { currentRunXP += amount; runStageClearXP += amount; }

    public void AddPerfectClearXP(int amount) { currentRunXP += amount; runPerfectClearXP += amount; }
    public void AddBossKillXP(int amount) { currentRunXP += amount; runBossKillXP += amount; }

    // 사망 시 호출
    public void OnDeathConvertXP()
    {
        isRunActive = false;
        if (ObsessionUI.Instance != null)
        {
            // UI에 모든 성과 전달
            ObsessionUI.Instance.ShowDeathUI(survivalTimer, runMobKillXP, runStageClearXP, runBossKillXP, runPerfectClearXP, 0, currentRunXP, currentXP, xpRequirements);
        }
        AddXP(currentRunXP);
        ResetRunData();
    }

    public void AddXP(int amount)
    {
        currentXP += amount;
        CheckLevelUp();
        SaveData();
    }

    private void CheckLevelUp()
    {
        if (currentLevel - 1 < xpRequirements.Length)
        {
            if (currentXP >= xpRequirements[currentLevel - 1])
            {
                currentLevel++;
                CheckLevelUp(); // 연속 레벨업 체크
            }
        }
    }

    private void SaveData()
    {
        PlayerPrefs.SetInt("ObsessionLevel", currentLevel);
        PlayerPrefs.SetInt("ObsessionXP", currentXP);
        PlayerPrefs.Save();
    }

    private void LoadData()
    {
        currentLevel = PlayerPrefs.GetInt("ObsessionLevel", 1);
        currentXP = PlayerPrefs.GetInt("ObsessionXP", 0);
    }

    public int GetCurrentRunXP() => currentRunXP;
    public int GetCurrentXP() => currentXP;
    public int GetCurrentLevel() => currentLevel;
    public int GetClearedRoomsThisRun() => clearedRoomsThisRun;
}