using System;
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using Ichni.Editor;
using Ichni.RhythmGame;
using Ichni.RhythmGame.Beatmap;
using UnityEngine;

namespace Ichni
{
    public class ProjectManager
    {
        public static readonly ES3Settings SaveSettings = new ES3Settings
        {
            compressionType = ES3.CompressionType.None,
            encryptionType = ES3.EncryptionType.None,
            format = ES3.Format.JSON,
        };

        public static readonly ES3Settings ExportSettings = new ES3Settings
        {
            compressionType = ES3.CompressionType.Gzip,
            encryptionType = ES3.EncryptionType.AES,
            encryptionPassword = "Soullies515",
            format = ES3.Format.JSON,
        };

        public SaveManager saveManager;
        public LoadManager loadManager;
        public ExportManager exportManager;
        public BeatmapClipManager beatmapClipManager;
        public NotePrefabManager notePrefabManager;
        public AutoSaveManager autoSaveManager;

        public ProjectManager()
        {
            saveManager = new SaveManager();
            loadManager = new LoadManager();
            exportManager = new ExportManager();
            beatmapClipManager = new BeatmapClipManager();
            notePrefabManager = new NotePrefabManager();
            autoSaveManager = new AutoSaveManager();
        }

        public void GenerateEmptyProject(ProjectInformation_BM projectInfo_BM, SongInformation_BM songInfo_BM)
        {
            projectInfo_BM.ExecuteBM();
            songInfo_BM.ExecuteBM();

            EditorManager.instance.beatmapContainer = new BeatmapContainer();
            EditorManager.instance.commandScripts = new CommandScripts(new List<string>());
        }
    }

    public class ExportManager
    {
        public void Export()
        {
            string exportPath = Application.streamingAssetsPath + "/Export/" +
                                EditorManager.instance.projectInformation.projectName;
            string projectInfoPath = exportPath + "/ProjectInfo.bytes";
            string songInfoPath = exportPath + "/SongInfo.bytes";
            string beatmapPath = exportPath + "/BeatMap.bytes";
            string commandScriptsPath = exportPath + "/CommandScripts.bytes";

            LogWindow.Log("Start Exporting...");

            ExportProjectInfo(projectInfoPath);
            ExportSongInfo(songInfoPath);
            ExportBeatMap(beatmapPath);
            ExportCommandScripts(commandScriptsPath);

            LogWindow.Log("Export Complete", Color.green);
        }

        private void ExportProjectInfo(string exportPath)
        {
            EditorManager.instance.projectInformation.SaveBM();
            ES3.Save("ProjectInformation", EditorManager.instance.projectInformation.matchedBM as ProjectInformation_BM,
                exportPath, ProjectManager.ExportSettings);
        }

        private void ExportSongInfo(string exportPath)
        {
            EditorManager.instance.songInformation.SaveBM();
            ES3.Save("SongInformation", EditorManager.instance.songInformation.matchedBM as SongInformation_BM,
                exportPath, ProjectManager.ExportSettings);
        }

        private void ExportBeatMap(string exportPath)
        {
            EditorManager.instance.beatmapContainer.SaveBM();
            ES3.Save("BeatMap", EditorManager.instance.beatmapContainer.matchedBM as BeatmapContainer_BM,
                exportPath, ProjectManager.ExportSettings);
        }

        private void ExportCommandScripts(string exportPath)
        {
            EditorManager.instance.commandScripts.SaveBM();
            ES3.Save("CommandScripts", EditorManager.instance.commandScripts.matchedBM as CommandScripts_BM,
                exportPath, ProjectManager.ExportSettings);
        }
    }

    public class SaveManager
    {
        public void Save()
        {
            LogWindow.Log("Start Saving...");

            SaveProjectInfo();
            SaveSongInfo();
            SaveBeatMap();
            SaveCommandScripts();

            LogWindow.Log("Save Complete", Color.green);
        }

        private void SaveProjectInfo()
        {
            EditorManager.instance.projectInformation.SaveBM();
            ES3.Save("ProjectInformation", EditorManager.instance.projectInformation.matchedBM as ProjectInformation_BM,
                EditorManager.instance.projectInformation.peojectInfoPath, ProjectManager.SaveSettings);
        }

        private void SaveSongInfo()
        {
            EditorManager.instance.songInformation.SaveBM();
            ES3.Save("SongInformation", EditorManager.instance.songInformation.matchedBM as SongInformation_BM,
                EditorManager.instance.projectInformation.songInfoPath, ProjectManager.SaveSettings);
        }

        private void SaveBeatMap()
        {
            EditorManager.instance.beatmapContainer.SaveBM();
            ES3.Save("BeatMap", EditorManager.instance.beatmapContainer.matchedBM as BeatmapContainer_BM,
                EditorManager.instance.projectInformation.beatmapPath, ProjectManager.SaveSettings);
        }

        private void SaveCommandScripts()
        {
            EditorManager.instance.commandScripts.SaveBM();
            ES3.Save("CommandScripts", EditorManager.instance.commandScripts.matchedBM as CommandScripts_BM,
                EditorManager.instance.projectInformation.CommandScriptsPath, ProjectManager.SaveSettings);
        }
    }

    public class LoadManager
    {
        public void Load(string projectName)
        {
            LoadProjectInfo(projectName);
            LoadSongInfo();
            LoadCommandScripts();
            LoadBeatMap();
            LogWindow.Log("Load Complete", Color.green);
        }

        private void LoadProjectInfo(string projectName)
        {
            string projectInfoPath = Application.streamingAssetsPath + "/Projects/" + projectName + "/ProjectInfo.json";
            ES3.Load<ProjectInformation_BM>("ProjectInformation", projectInfoPath, ProjectManager.SaveSettings).ExecuteBM();
        }

        private void LoadSongInfo()
        {
            ES3.Load<SongInformation_BM>("SongInformation", EditorManager.instance.projectInformation.songInfoPath,
                ProjectManager.SaveSettings).ExecuteBM();
        }

        private void LoadBeatMap()
        {
            ES3.Load<BeatmapContainer_BM>("BeatMap", EditorManager.instance.projectInformation.beatmapPath,
                ProjectManager.SaveSettings).ExecuteBM();
        }

        private void LoadCommandScripts()
        {
            ES3.Load<CommandScripts_BM>("CommandScripts", EditorManager.instance.projectInformation.CommandScriptsPath,
                ProjectManager.SaveSettings).ExecuteBM();
        }
    }

    public class BeatmapClipManager
    {
        public void SaveClip(string clipName)
        {
            LogWindow.Log("Start Saving Clip...");

            if (EditorManager.instance.operationManager.currentSelectedElements.Count != 1) // TODO: 后续适应多选
            {
                LogWindow.Log("Please select only one Game Element to save the beatmap clip.", Color.red);
                return;
            }

            GameElement selectedElement = EditorManager.instance.operationManager.currentSelectedElements[0];

            if (selectedElement is null)
            {
                LogWindow.Log("Please select a Game Element to save the beatmap clip.", Color.red);
                return;
            }

            _SaveClip(selectedElement, clipName);

            LogWindow.Log("Save Clip Complete", Color.green);
        }
        
        public void LoadClip(string clipName)
        {
            LogWindow.Log("Start Loading Clip...");
            
            if(!ES3.FileExists(Application.streamingAssetsPath + "/Clips/" + clipName + ".json"))
            {
                LogWindow.Log("Clip not found", Color.red);
                return;
            }

            if (EditorManager.instance.operationManager.currentSelectedElements.Count != 1) // TODO: 后续适应多选
            {
                LogWindow.Log("Please select only one Game Element to load the beatmap clip.", Color.red);
                return;
            }
            
            GameElement selectedElement = EditorManager.instance.operationManager.currentSelectedElements[0];
            
            if (selectedElement is null)
            {
                LogWindow.Log("Please select a Game Element to load the beatmap clip.", Color.red);
                return;
            }
            Debug.Log(selectedElement.elementName + " " + selectedElement.elementGuid);
            
            _LoadClip(selectedElement, clipName);

            LogWindow.Log("Load Clip Complete", Color.green);
        }

        private void _SaveClip(GameElement element, string clipName)
        {
            List<BaseElement_BM> clip = new List<BaseElement_BM>();

            element.GetAllGameElementsFromThis().ForEach(e =>
            {
                e.SaveBM();
                clip.Add(e.matchedBM);
                e.submoduleList.ForEach(s =>
                {
                    s.SaveBM();
                    clip.Add(s.matchedBM);
                });
            });

            string filePath = Application.streamingAssetsPath + "/Clips/" + clipName + ".json";
            ES3.Save("Clip", clip, filePath, ProjectManager.SaveSettings);
        }

        private void _LoadClip(GameElement target, string clipName)
        {
            string filePath = Application.streamingAssetsPath + "/Clips/" + clipName + ".json";
            List<BaseElement_BM> clip = ES3.Load<List<BaseElement_BM>>("Clip", filePath, ProjectManager.SaveSettings);
            
            //对于第一个元素，需要特殊处理，将它放入目标物体的子物体列表中
            GameElement_BM first = clip[0] as GameElement_BM;
            List<BaseElement_BM> firstAttaches = GameElement_BM.GetAllAttachedBaseElements(first, clip);
            first.elementGuid = Guid.NewGuid();
            GameElement_BM.identifier.TryAdd(first.elementGuid, first);
            firstAttaches.ForEach(e => { e.attachedElementGuid = first.elementGuid; });
            
            //将目标物体（临时）存入读存档的Dictionary中
            target.SaveBM();
            GameElement_BM.identifier.TryAdd(target.elementGuid, target.matchedBM as GameElement_BM);
            (target.matchedBM as GameElement_BM).matchedElement = target; 
            first.attachedElementGuid = target.elementGuid;

            for (var index = 1; index < clip.Count; index++)
            {
                var element = clip[index];
                if (element is GameElement_BM gameElement)
                {
                    List<BaseElement_BM> attachedElements = GameElement_BM.GetAllAttachedBaseElements(gameElement, clip);
                    gameElement.elementGuid = Guid.NewGuid();
                    GameElement_BM.identifier.TryAdd(gameElement.elementGuid, gameElement);
                    attachedElements.ForEach(e => { e.attachedElementGuid = gameElement.elementGuid; });
                }
            }

            first.ExecuteBM();
            
            for (var index = 1; index < clip.Count; index++)
            {
                clip[index].ExecuteBM();
            }
        }
    }

    public class NotePrefabManager
    {
        private string notePrefabPath => Application.streamingAssetsPath + "/NotePrefabs";
        private string GetNotePrefabPath(string notePrefabName) => notePrefabPath + "/" + notePrefabName + ".json";

        public void SaveNotePrefab(NoteBase note, string noteName)
        {
            List<BaseElement_BM> clip = new List<BaseElement_BM>();

            note.GetAllGameElementsFromThis().ForEach(e =>
            {
                e.SaveBM();
                clip.Add(e.matchedBM);
                e.submoduleList.ForEach(s =>
                {
                    s.SaveBM();
                    if (s.matchedBM != null)
                    {
                        clip.Add(s.matchedBM);
                    }
                });
            });
            
            ES3.Save("Note", clip, GetNotePrefabPath(noteName), ProjectManager.SaveSettings);
        }

        public void LoadNotePrefab(NoteBase target, string noteName)
        {
            List<BaseElement_BM> clip = ES3.Load<List<BaseElement_BM>>("Note", GetNotePrefabPath(noteName), ProjectManager.SaveSettings);

            if (clip == null || clip.Count == 0)
            {
                LogWindow.Log("Note prefab not found", Color.red);
                return;
            }
            
            target.SaveBM();
            GameElement_BM.identifier.TryAdd(target.elementGuid, target.matchedBM as GameElement_BM);
            (target.matchedBM as GameElement_BM).matchedElement = target; 
            
            GameElement_BM first = clip[0] as GameElement_BM;
            List<BaseElement_BM> firstAttaches = GameElement_BM.GetAllAttachedBaseElements(first, clip);
            first.elementGuid = target.elementGuid;
            GameElement_BM.identifier.TryAdd(first.elementGuid, first);
            firstAttaches.ForEach(e => { e.attachedElementGuid = first.elementGuid; });
            
            for (var index = 1; index < clip.Count; index++)
            {
                var element = clip[index];
                if (element is GameElement_BM gameElement)
                {
                    List<BaseElement_BM> attachedElements = GameElement_BM.GetAllAttachedBaseElements(gameElement, clip);
                    gameElement.elementGuid = Guid.NewGuid();
                    GameElement_BM.identifier.TryAdd(gameElement.elementGuid, gameElement);
                    attachedElements.ForEach(e => { e.attachedElementGuid = gameElement.elementGuid; });
                }
            }
            
            for (var index = 1; index < clip.Count; index++)
            {
                clip[index].ExecuteBM();
            }
        }
    }

    public class AutoSaveManager
    {
        private string autoSavePath => Application.streamingAssetsPath + "/AutoSave/" +
                                      EditorManager.instance.projectInformation.projectName;
        private string GetAutoSavePath(string autoSaveName) => autoSavePath + "/" + autoSaveName + ".json";
        private float autoSaveInterval => EditorManager.instance.editorSettings.autoSaveInterval;
        private int maximumAutoSaveCount => EditorManager.instance.editorSettings.maximumAutoSaveCount;
        
        public float autoSaveTimer;

        public AutoSaveManager()
        {
            autoSaveTimer = 0;
        }

        public void UpdateAutoSave()
        {
            autoSaveTimer += Time.deltaTime;
            if (autoSaveTimer >= autoSaveInterval)
            {
                AutoSave();
                autoSaveTimer = 0;
            }
        }

        private void AutoSave()
        {
            List<string> saveFiles = GetSortedSaveFiles();

            if (saveFiles.Count > 0)
            {
                // 删除最旧的存档（如果超过数量）
                if (saveFiles.Count >= maximumAutoSaveCount)
                {
                    string oldestSave = saveFiles[saveFiles.Count - 1];
                    File.Delete(oldestSave);
                    saveFiles.RemoveAt(saveFiles.Count - 1);
                }

                // 依次重命名存档
                for (int i = saveFiles.Count - 1; i >= 0; i--)
                {
                    string oldPath = saveFiles[i];
                    string newPath = GetAutoSavePath($"AutoSave_{i + 1}");
                    File.Move(oldPath, newPath);
                }
            }

            // 保存最新存档
            string newestSavePath = GetAutoSavePath("AutoSave_0");
            SaveBeatMap(newestSavePath);
        }
        
        private void SaveBeatMap(string autoSavePath)
        {
            EditorManager.instance.beatmapContainer.SaveBM();
            ES3.Save("BeatMap", EditorManager.instance.beatmapContainer.matchedBM as BeatmapContainer_BM,
                autoSavePath, ProjectManager.SaveSettings);
        }
        
        private List<string> GetSortedSaveFiles()
        {
            if(!ES3.DirectoryExists(autoSavePath))
            {
                Directory.CreateDirectory(autoSavePath);
            }
            
            List<string> saveFiles = new List<string>(Directory.GetFiles(autoSavePath, "AutoSave_*.es3"));
            saveFiles.Sort(string.Compare);
            return saveFiles;
        }
    }
}