using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using AibisDream.FixSystem;
using AibisDream.Framework;
using AibisDream.Kit;
using AibisDream.Utility;
using UnityEngine;
using UnityEngine.AddressableAssets;
using UnityEngine.ResourceManagement.AsyncOperations;
using Yarn.Unity;

namespace AibisDream
{
    public class GameManager : Singleton<GameManager>, IGameManager
    {
        #region 运行模式相关

        private TalkSceneSO[] _totalSceneSos;

        public RunMode runMode;

        [Header("生产环境数据（一般不动）")] public TalkSceneSO firstTalkSo;
        [Header("单场景测试")] public TalkSceneSO testTalkSo;
        [Header("存档测试")] public string saveFileName;

        #endregion

        private BindProperty<TalkSceneSO> _currentTalkSceneSo;
        private readonly GameLoopData _data = new();

        private void Start()
        {
            // 管理游戏开始时各部分的初始化
            SettingLoader.Init();
            // 数据类注册
            StorageSystem.Instance.RegisterData(_data);
            // 场景So事件注册
            _currentTalkSceneSo = new BindProperty<TalkSceneSO>();
            _currentTalkSceneSo.Register(item => _data.curSceneSoName = item.name);
            // 事件广播
            EnumEventSystem.Global.Send(GameLoopEnum.AppStart);
            // 加载SO
            Addressables.LoadAssetsAsync<TalkSceneSO>("SceneSO", null).Completed += LoadTalkSo;

#if UNITY_EDITOR
            if (runMode == RunMode.SingleScene)
            {
                StartWithLevel(testTalkSo);
            }
            else if (runMode == RunMode.SaveFile)
            {
                StartWithSaveFile($"{ConstRef.TestSaveFilePath}/{saveFileName}");
            }
            else
            {
                ActionKit.Sequence()
                    .Callback(() => UIManager.Instance.GetPanel<PlayToolPanel>().FadeInSync(0))
                    .Coroutine(() => SceneLoader.Instance.LoadSceneAsync("ClinicOut"))
                    .Callback(() => UIManager.Instance.GetPanel<PlayToolPanel>().FadeOutSync())
                    .Start(this);
            }
#else
            SceneLoader.Instance.LoadScene("ClinicOut");
            runMode = RunMode.Product;
#endif
        }

        private void LoadTalkSo(AsyncOperationHandle<IList<TalkSceneSO>> handle)
        {
            if (handle.Status == AsyncOperationStatus.Succeeded)
            {
                _totalSceneSos = handle.Result.ToArray();
            }
            else
            {
                Debug.LogError("Failed to load textures.");
            }
        }

        #region 游戏循环

        public void StartNewGame()
        {
            // 游戏开始
            EnumEventSystem.Global.Send(GameLoopEnum.GameStart);
            // 重置屏幕效果
            ScreenEffectManager.Instance?.ResetSaturation();
            // 序列
            _currentTalkSceneSo.Value = firstTalkSo;
            StartCoroutine(LoadFirstScene());
        }

        public void StartWithLevel(TalkSceneSO sceneSo)
        {
            // 游戏开始
            EnumEventSystem.Global.Send(GameLoopEnum.GameStart);
            // 重置屏幕效果
            ScreenEffectManager.Instance?.ResetSaturation();

            _currentTalkSceneSo.Value = sceneSo;
            StartCoroutine(LoadFirstScene());
        }

        public void StartWithSaveFile(string fileName)
        {
            // 游戏开始
            EnumEventSystem.Global.Send(GameLoopEnum.GameStart);

            StorageSystem.Instance.Load(fileName);
        }

        private IEnumerator LoadFirstScene()
        {
            yield return UIManager.Instance.GetPanel<PlayToolPanel>().FadeInAsync(0.5f);
            yield return SceneLoader.Instance.LoadSceneAsync(_currentTalkSceneSo.Value.firstSceneName);
            DialogController.Instance.StartDialog(_currentTalkSceneSo.Value.yarnProject);
        }

        public void PauseGame()
        {
            // 系统暂停
            Time.timeScale = 0;
            // 交互继续
            EnumEventSystem.Global.Send(GameLoopEnum.PauseGame);
            // 音频全部暂停
            AudioManager.Instance.PauseAll();
            // 关闭Dialog
            DialogCanvasManager.Instance.CloseCanvas();
        }

        public void ContinueGame()
        {
            // 系统继续
            Time.timeScale = 1;
            // 交互继续
            EnumEventSystem.Global.Send(GameLoopEnum.UnPauseGame);
            // 音频继续
            AudioManager.Instance.UnPauseAll();
            // 打开Dialog
            DialogCanvasManager.Instance.OpenCanvas();
        }

        public void QuitGame()
        {
            // 系统继续
            Time.timeScale = 1;
            // 重置屏幕效果
            ScreenEffectManager.Instance?.ResetSaturation();
            // 卸载当前场景
            StartCoroutine(RestartCoroutine());
        }

        public void QuitApp()
        {
            Application.Quit();
        }

        private IEnumerator RestartCoroutine()
        {
            UIManager.Instance.GetPanel<PlayToolPanel>().FadeInSync(0.1f);

            // 清理所有系统注册
            if (FixSystemCenter.SystemDic != null)
            {
                FixSystemCenter.SystemDic.Clear();
            }
            
            // 执行场景切换等功能
            CameraKit.Instance.ResetCamera();
            yield return SceneLoader.Instance.LoadSceneAsync("ClinicOut");
            DialogController.Instance.StopDialog();
            EnumEventSystem.Global.Send(GameLoopEnum.GameQuit);
            // 音频继续
            AudioManager.Instance.UnPauseAll();
            // 打开Dialog
            DialogCanvasManager.Instance.OpenCanvas();

            yield return UIManager.Instance.GetPanel<PlayToolPanel>().FadeOutAsync();
        }

        #endregion

        #region 分辨率与屏幕模式

        public void SetScreenMode(string windowMode)
        {
            switch (windowMode)
            {
                case "FullScreen":
                    Screen.SetResolution(Screen.currentResolution.width, Screen.currentResolution.height, FullScreenMode.FullScreenWindow);
                    break;
                case "Windowed":
                    Screen.SetResolution(1920, 1080, FullScreenMode.Windowed);
                    break;
                case "MaximizedWindow":
                    Screen.SetResolution(Screen.currentResolution.width, Screen.currentResolution.height, FullScreenMode.MaximizedWindow);
                    break;
                default:
                    Debug.Log($"{windowMode} err");
                    break;
            }
        }

        #endregion

        public IEnumerator NextSceneSo()
        {
            if (_currentTalkSceneSo.Value && _currentTalkSceneSo.Value.nextScene)
            {
                _currentTalkSceneSo.Value = _currentTalkSceneSo.Value.nextScene;
                yield return UIManager.Instance.GetPanel<PlayToolPanel>().FadeInAsync();
                yield return SceneLoader.Instance.LoadSceneAsync(_currentTalkSceneSo.Value.firstSceneName);
                DialogController.Instance.StartDialog(_currentTalkSceneSo.Value.yarnProject);
            }
            else
            {
                yield return null;
                Debug.Log("没有下个场景了");
            }
        }

        public void SetSceneSoByName(string soName)
        {
            _currentTalkSceneSo.Value = Array.Find(_totalSceneSos, so => so.name == soName);
        }

        public void StartDialog()
        {
            DialogController.Instance.LoadDialog(_currentTalkSceneSo.Value.yarnProject);
        }

        public string GetSceneSoName()
        {
            return _currentTalkSceneSo.Value.name;
        }
    }

    /// <summary>
    /// GameManager应该包含什么功能？
    /// 1. 游戏状态管理。开始/暂停/结束
    /// 2. 全局设置 即SettingLoader
    /// 3. 场景管理 有SceneLoader类，暂无必要
    /// 4. 资源管理 似无必要
    /// 5. 时间管理 主要供暂停使用
    /// 6. 日志和调试 日志已有
    /// </summary>
    public interface IGameManager
    {
        #region 游戏循环相关

        public void StartNewGame();
        public void PauseGame();
        public void ContinueGame();
        public void QuitGame();
        public void QuitApp();

        #endregion
    }

    [Serializable]
    [LoadIndex(10)]
    public class GameLoopData : IData
    {
        public string curSceneSoName;

        public IEnumerator Load()
        {
            GameManager.Instance.SetSceneSoByName(curSceneSoName);
            GameManager.Instance.StartDialog();
            yield break;
        }
    }

    public static class GameLoopYarnCommand
    {
        [YarnCommand("auto_save")]
        public static void AutoSave()
        {
            StorageSystem.Instance.Save();
        }
    }

    public enum RunMode
    {
        Product,
        SingleScene,
        SaveFile
    }
}