using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Ichni.RhythmGame;
using Ichni.RhythmGame.UI;
using Sirenix.OdinInspector;
using SLSUtilities.General;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.Serialization;

namespace Ichni
{
    public partial class GameManager : Singleton<GameManager>, ISongTimeProvider
    {
        [FormerlySerializedAs("audioManager")] public SongPlayer songPlayer;
        
        public CameraManager cameraManager;
        
        [FormerlySerializedAs("inputManager")] public NoteJudgeManager noteJudgeManager;
        
        public BackgroundSetter backgroundSetter;
        public BackgroundController backgroundController;
        
        public VariablesContainer variablesContainer;
        
        public ProjectLoader projectLoader;
        public PlayingRecorder playingRecorder;
        
        public BeatmapContainer beatmapContainer;
        public CommandScripts commandScripts;
        public ProjectInformation projectInformation;
        public SongInformation songInformation;

        public List<TimeDurationSubmodule> timeDurations;
        public AnimationManager animationManager;
        public TrackManager trackManager;
        public NoteManager noteManager;
        
        public BasePrefabsCollection basePrefabs;
        public Dictionary<string, CustomPrefabsCollection> customPrefabs;
        
        public List<IHaveTransformSubmodule> activeTransformSubmodules = new List<IHaveTransformSubmodule>();
        public List<IHaveColorSubmodule> activeColorSubmodules = new List<IHaveColorSubmodule>();
        public List<IHaveDirtyMarkSubmodule> activeDirtyMarkSubmodules = new List<IHaveDirtyMarkSubmodule>();

        public ElementUpdateScheduler updateScheduler;
        
        [Title("UI")]
        public Canvas judgeHintCanvas;
        public GameUICanvas gameUICanvas;
        public GameLoadingCanvas gameLoadingCanvas;
        public SummaryPageCanvas summaryPageCanvas;
        
        public float SongTime => songPlayer.isStarting ? 0 : 
            songPlayer.songTimeSegment - songInformation.offset - (SettingsManager.instance.gameSettings.beatmapOffset / 1000f);
        public bool IsPlaying => songPlayer != null && songPlayer.isPlaying;
        
        
        public bool isDebugging;
        
        protected override void Awake()
        {
            base.Awake();
            CoreServices.TimeProvider = this;
            timeDurations = new List<TimeDurationSubmodule>();
            playingRecorder = new PlayingRecorder();
            playingRecorder.Initialize();
            updateScheduler = new ElementUpdateScheduler();
            CoreServices.UpdateScheduler = updateScheduler;
        }

        private void Start()
        {
            basePrefabs.PrepareAudios();
            projectLoader.TestLoad();
        }

        private void Update()
        {
            updateScheduler.TickEarly(SongTime);
        }

        private void LateUpdate()
        {
            updateScheduler.TickLate();
        }
    }

    public partial class GameManager
    {
        /// <summary>
        /// 将当前演奏结果写入独立的游戏记录存档。
        /// <para>由 SongPlayer 在实际歌曲结束后、打开 Summary 前调用。</para>
        /// <para>剧情树、选项和 Yarn 变量仍由 <see cref="StorySaveModule"/> 单独管理。</para>
        /// 当前 Difficulty 的 Chart Revision 会一并传入，从而在谱面改版时只清除不可比较的单谱面成绩。
        /// </summary>
        public bool SaveCurrentPlayRecord()
        {
            if (GameSaveManager.instance == null || GameSaveManager.instance.SongSaveModule == null)
            {
                Debug.LogWarning("Cannot save play record because SongSaveModule is not initialized.");
                return false;
            }

            if (InformationTransistor.instance == null ||
                InformationTransistor.instance.song == null ||
                InformationTransistor.instance.difficulty == null)
            {
                Debug.LogWarning("Cannot save play record because the selected song or difficulty is missing.");
                return false;
            }

            return GameSaveManager.instance.SongSaveModule.RecordPlayResult(
                InformationTransistor.instance.song.songName,
                InformationTransistor.instance.difficulty.saveDifficultyId,
                InformationTransistor.instance.difficulty.GetChartRevision(),
                playingRecorder);
        }

        public static void RestartGame()
        {
            // 保留 InformationTransistor 中的歌曲和返回目标，使教程与普通歌曲的重开都回到正确页面。
            SceneManager.LoadScene("GameScene");
            Time.timeScale = 1f; // 确保重启时时间缩放恢复正常
        }

        public static void ReturnToMenu()
        {
            Time.timeScale = 1f; // 确保返回时时间缩放恢复正常
            // 返回目标已在进入 GameScene 时写入 InformationTransistor；这里不再写互斥布尔值。
            SceneManager.LoadScene("MenuScene");
        }
    }
}