using UnityEngine;
using UnityEngine.Events;

public class RhythmGameManager : MonoBehaviour
{
    public enum ResultType
    {
        Perfect,
        Good,
        Miss
    }

    [Header("References")]
    [SerializeField] private RhythmGameUI ui;
    [SerializeField] private CatNoteSpawner noteSpawner;
    [SerializeField] private RhythmHapticManager haptic;

    [Header("Game Settings")]
    [SerializeField] private string songTitle = "고양이 합창단의 노래";
    [SerializeField] private bool startOnAwake = false;
    [SerializeField] private bool useFishBonusOnStart = false;

    [Header("Rules")]
    [SerializeField] private int requiredScore = 1000;
    [SerializeField] private int allowedMisses = 5;
    [SerializeField] private int perfectScore = 150;
    [SerializeField] private int goodScore = 80;

    [Header("Judgment Distance")]
    [Tooltip("HitZone 중심과 노트 중심의 거리입니다. 값이 작을수록 판정이 어려워집니다.")]
    [SerializeField] private float perfectDistance = 35f;
    [SerializeField] private float goodDistance = 75f;
    [SerializeField] private float missRemoveDistance = 120f;

    [Header("Events")]
    public UnityEvent onGameStarted;
    public UnityEvent onGameSuccess;
    public UnityEvent onGameFailed;
    public UnityEvent onPerfect;
    public UnityEvent onGood;
    public UnityEvent onMiss;

    [Header("Debug")]
    [SerializeField] private bool showDebugLog = true;

    private int score;
    private int combo;
    private int missCount;
    private bool activeGame;
    private bool fishBonusActive;

    public int Score => score;
    public int Combo => combo;
    public int MissCount => missCount;
    public bool IsPlaying => activeGame;
    public bool FishBonusActive => fishBonusActive;

    private void OnEnable()
    {
        if (noteSpawner != null)
            noteSpawner.NoteAutoMissed += HandleAutoMiss;
    }

    private void OnDisable()
    {
        if (noteSpawner != null)
            noteSpawner.NoteAutoMissed -= HandleAutoMiss;
    }

    private void Start()
    {
        if (startOnAwake)
            StartGame(useFishBonusOnStart);
        else
            InitializeIdleState();
    }

    private void InitializeIdleState()
    {
        score = 0;
        combo = 0;
        missCount = 0;
        activeGame = false;

        if (ui != null)
        {
            ui.InitializeUI(songTitle);
            ui.ShowFishBonus(false);
        }

        if (noteSpawner != null)
            noteSpawner.StopSpawn(true);
    }

    public void StartGame()
    {
        StartGame(false);
    }

    public void StartGameWithFishBonus()
    {
        StartGame(true);
    }

    public void StartGame(bool useFishBonus)
    {
        score = 0;
        combo = 0;
        missCount = 0;
        fishBonusActive = useFishBonus;
        activeGame = true;

        if (ui != null)
        {
            ui.InitializeUI(songTitle);
            ui.ShowFishBonus(fishBonusActive);
            ui.UpdateScore(score);
            ui.UpdateCombo(combo);
        }

        if (noteSpawner != null)
            noteSpawner.StartSpawn(fishBonusActive);

        onGameStarted?.Invoke();

        if (showDebugLog)
            Debug.Log("[RhythmGameManager] 리듬게임 시작");
    }

    public void SubmitHit()
    {
        if (!activeGame)
            return;

        if (noteSpawner == null)
        {
            RegisterMiss(null, false);
            return;
        }

        RhythmNote closestNote = noteSpawner.GetClosestNote();

        if (closestNote == null)
        {
            RegisterMiss(null, false);
            return;
        }

        float distance = closestNote.GetDistanceToHitZone();
        ResultType result = EvaluateResult(distance);

        switch (result)
        {
            case ResultType.Perfect:
                RegisterPerfect(closestNote);
                break;

            case ResultType.Good:
                RegisterGood(closestNote);
                break;

            case ResultType.Miss:
                bool removeNote = distance <= missRemoveDistance;
                RegisterMiss(closestNote, removeNote);
                break;
        }

        CheckGameEnd();
    }

    private ResultType EvaluateResult(float distance)
    {
        if (distance <= perfectDistance)
            return ResultType.Perfect;

        if (distance <= goodDistance)
            return ResultType.Good;

        return ResultType.Miss;
    }

    private void RegisterPerfect(RhythmNote note)
    {
        score += perfectScore;
        combo++;

        if (noteSpawner != null)
            noteSpawner.RemoveNote(note, true);

        if (ui != null)
        {
            ui.UpdateScore(score);
            ui.UpdateCombo(combo);
            ui.ShowJudgment("완벽!");
        }

        if (haptic != null)
            haptic.Perfect();

        onPerfect?.Invoke();

        if (showDebugLog)
            Debug.Log("[RhythmGameManager] Perfect");
    }

    private void RegisterGood(RhythmNote note)
    {
        score += goodScore;
        combo++;

        if (noteSpawner != null)
            noteSpawner.RemoveNote(note, true);

        if (ui != null)
        {
            ui.UpdateScore(score);
            ui.UpdateCombo(combo);
            ui.ShowJudgment("좋아!");
        }

        if (haptic != null)
            haptic.Good();

        onGood?.Invoke();

        if (showDebugLog)
            Debug.Log("[RhythmGameManager] Good");
    }

    private void RegisterMiss(RhythmNote note, bool removeNote)
    {
        missCount++;
        combo = 0;

        if (removeNote && noteSpawner != null && note != null)
            noteSpawner.RemoveNote(note, true);

        if (ui != null)
        {
            ui.UpdateCombo(combo);
            ui.ShowJudgment("실패!");
        }

        if (haptic != null)
            haptic.Miss();

        onMiss?.Invoke();

        if (showDebugLog)
            Debug.Log($"[RhythmGameManager] Miss {missCount}/{allowedMisses}");
    }

    private void HandleAutoMiss(RhythmNote note)
    {
        if (!activeGame)
            return;

        RegisterMiss(note, false);
        CheckGameEnd();
    }

    private void CheckGameEnd()
    {
        if (!activeGame)
            return;

        if (score >= requiredScore)
        {
            GameSuccess();
            return;
        }

        if (missCount >= allowedMisses)
        {
            GameFail();
        }
    }

    private void GameSuccess()
    {
        activeGame = false;

        if (noteSpawner != null)
            noteSpawner.StopSpawn(true);

        if (ui != null)
            ui.ShowFinalResult("리듬 성공!");

        onGameSuccess?.Invoke();

        if (showDebugLog)
            Debug.Log("[RhythmGameManager] 리듬게임 성공");
    }

    private void GameFail()
    {
        activeGame = false;

        if (noteSpawner != null)
            noteSpawner.StopSpawn(true);

        if (ui != null)
            ui.ShowFinalResult("리듬 실패!");

        onGameFailed?.Invoke();

        if (showDebugLog)
            Debug.Log("[RhythmGameManager] 리듬게임 실패");
    }

    public void StopGame()
    {
        activeGame = false;

        if (noteSpawner != null)
            noteSpawner.StopSpawn(true);
    }

    public void ResetGame()
    {
        StartGame(fishBonusActive);
    }
}