using MU3.Collab;
using MU3.DB;
using MU3.Game;
using MU3.Notes;
using MU3.Util;
using System.Collections;
using System.Reflection;
using UnityEngine;

namespace MU3.Battle;

class patch_GameEngine: GameEngine {
    private static readonly float PAUSE_CD = 5f;

    private NotesManager _notesManager;

    private static bool _paused;
    private float _pauseTimer;
    private UIDialog _dialog;

    public extern void orig_reset();
    public new void reset() {
        orig_reset();
        togglePause(false);
        _pauseTimer = 0;

        if(_dialog != null) {
            _dialog.forceCancel();
            _dialog = null;
        }
    }

    public extern void orig_execute();
    public new void execute() {
        if(_paused) {
            return;
        }

        orig_execute();

        _pauseTimer -= Time.deltaTime;

        if(Singleton<UIInput>.instance.getTriggerOn(UIInput.Key.Service)) {
            if(_pauseTimer < 0f && !isPartyPlay() && notesManager.isPlaying) {
                togglePause(true);
                _dialog = UIDialog.create(DialogID.LackOfGP, "Pause", (int _, bool _) => togglePause(false));
                StartCoroutine(killTimer(_dialog));
            }
        }
    }

    private void togglePause(bool value) {
        ((patch_GameBGM)Singleton<GameSound>.instance.gameBGM).pause(value);
        _paused = value;
        _notesManager.setPause(value);
        _pauseTimer = PAUSE_CD;
    }

    private IEnumerator killTimer(UIDialog dialog) {
        var fi = typeof(UIDialog).GetField("uiTimer_", BindingFlags.Instance | BindingFlags.NonPublic);

        if(fi == null) {
            yield break;
        }

        int limit = 500;
        UITimer timer;
        do {
            yield return new WaitForEndOfFrame();
            timer = (UITimer)fi.GetValue(dialog);
            if(--limit == 0) {
                yield break;
            }
        } while(timer == null);

        timer.Pause = true;
        timer.Show = false;
        timer.enabled = false;

        yield break;
    }

    private bool isPartyPlay() {
        Party.IManager manager = Party.get();
        return manager != null && manager.isJoinAndActive();
    }
}