using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using MCI18n.Models;
using MCI18n.Utilities;
using Microsoft.Win32;
using SharpNBT;
using SharpNBT.SNBT;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace MCI18n
{
    public partial class MainWindowViewModel : ObservableObject
    {
        private List<CompoundTag> _oriQuestsData;
        private List<string> _updatedChapters;
        private List<QuestLangModel> _langs;
        [ObservableProperty]
        private ObservableCollection<ChapterModel> _chapters;
         


        [ObservableProperty]
        private ObservableCollection<QuestModel> _selectedQuests;

        [ObservableProperty]
        private bool _loading = false;

        [RelayCommand]
        private void LoadQuests()
        {
            var openFolderDialog = new OpenFolderDialog
            { 
                Title = "选择ftbquests文件夹",
                Multiselect = false
            };

            if (openFolderDialog.ShowDialog() == true)
            {
                try
                { 
                    var folderPath = openFolderDialog.FolderName;
                    GlobalContext.MultipleLangSupport = Path.Exists(Path.Combine(folderPath, "quests", "lang"));
                    if (GlobalContext.MultipleLangSupport)
                    {
                        var enLangFile = Path.Combine(folderPath, "quests", "lang", "en_us.snbt");
                        var langData = StringNbt.Parse(File.ReadAllText(enLangFile));
                        _langs = [];
                        foreach (var item in langData)
                        {
                            var langKeys = item.Name.Split('.');
                            var langItem = new QuestLangModel
                            {
                                Type = langKeys[0],
                                Id = langKeys[1],
                                DocType = langKeys[2],
                            };
                            if (item is StringTag langTag)
                            {
                                langItem.Value = langTag.Value;
                            }
                            else if(item is ListTag valueList)
                            {
                                var descList = new StringBuilder();
                                foreach (var value in valueList)
                                {
                                    descList.AppendLine((value as StringTag).Value);
                                }
                                langItem.Value = descList.ToString();
                            }
                            _langs.Add(langItem);
                        }
                    }

                    if(_langs != null)
                    {
                        var windowTitle = "FTB Quests Editor - " + _langs.FirstOrDefault(it => it.Type == "file" && it.Id == "0000000000000001" && it.DocType == "title").Value;
                        Application.Current.MainWindow.Title = windowTitle;
                    }
                    if (Path.Exists(Path.Combine(folderPath, "quests", "chapters")))
                    {
                        var fullQuestsPath = Path.Combine(folderPath, "quests", "chapters");
                        var questFiles = Directory.GetFiles(fullQuestsPath, "*.snbt", SearchOption.AllDirectories);
                        _oriQuestsData = new List<CompoundTag>();
                        _updatedChapters = new List<string>();
                        Chapters = new ObservableCollection<ChapterModel>();
                        foreach (var file in questFiles)
                        {
                            var questData = StringNbt.Parse(File.ReadAllText(file));
                            _oriQuestsData.Add(questData);
                            var chapterId = (questData["id"] as StringTag)?.Value;
                            var chapterName = (questData["filename"] as StringTag)?.Value ;
                            var chapterTitle = questData.ContainsKey("title") ? (questData["title"] as StringTag)?.Value : "";
                            var chapter = new ChapterModel
                            {
                                Id = chapterId,
                                Name = chapterName, 
                                Title = chapterTitle
                            };
                            if (GlobalContext.MultipleLangSupport)
                            {
                                chapter.Title = GetMutliLang("chapter",chapter.Id, "title");
                            }
                            Chapters.Add(chapter);
                            var quests = questData["quests"];
                            if(quests is ListTag questList)
                            {
                                foreach (var item in questList)
                                {
                                    if (item is CompoundTag questTag)
                                    {
                                        var questId = (questTag["id"] as StringTag)?.Value;
                                        var questTitle = "";
                                        if (questTag.ContainsKey("title"))
                                        {
                                            questTitle = (questTag["title"] as StringTag)?.Value ?? "";
                                        }
                                        else if (GlobalContext.MultipleLangSupport)
                                        {
                                            questTitle = GetMutliLang("quest", questId, "title");
                                        }
                                        var questSubTitle = "";
                                        if (questTag.ContainsKey("subtitle"))
                                        {
                                            questSubTitle = (questTag["subtitle"] as StringTag)?.Value ?? "";
                                        }
                                        else if (GlobalContext.MultipleLangSupport)
                                        {
                                            questSubTitle = GetMutliLang("quest", questId, "quest_subtitle");
                                        }
                                        var questDescriptions = new StringBuilder();
                                        if (questTag.ContainsKey("description"))
                                        {
                                            if (questTag["description"] is ListTag descriptions)
                                            {
                                                foreach (var desc in descriptions)
                                                {
                                                    questDescriptions.AppendLine((desc as StringTag)?.Value);
                                                }
                                            }
                                        }
                                        else if (GlobalContext.MultipleLangSupport)
                                        {
                                            var desc = GetMutliLang("quest", questId, "quest_desc");
                                            questDescriptions.AppendLine(desc);
                                        }

                                        var questModel = new QuestModel
                                        {
                                            Id = questId,
                                            Title = questTitle,
                                            SubTitle = questSubTitle,
                                            Description = questDescriptions.ToString()
                                        };
                                        chapter.Quests.Add(questModel);
                                    }
                                }
                            }
                        }
                        SelectedQuests = Chapters.First()?.Quests ?? [];
                    }
                    else
                    {
                        MessageBox.Show("文件夹选择错误！");
                    }
                    //var questData = StringNbt.Parse(File.ReadAllText(CurrentFilePath));
                    //SnbtWriter.SaveToFile(questData, CurrentFilePath + ".r", prettyPrint: true);
                }
                catch (Exception ex)
                {
                    MessageBox.Show($"加载文件失败: {ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                }
            }
        }

        [RelayCommand]
        private void SaveQuest()
        {
           
        }

        [RelayCommand]
        private void SaveQuestAs()
        {
            if (GlobalContext.MultipleLangSupport)
            {
                /// 另存为多语言文件
                
                var saveFileDialog = new SaveFileDialog
                {
                    Title = "保存多语言文件",
                    Filter = "SNBT 文件 (*.snbt)|*.snbt",
                    FileName = "zh_cn.snbt",
                };
                if (saveFileDialog.ShowDialog() == true)
                {
                    try
                    {
                        var filePath = saveFileDialog.FileName;
                        var langData = new CompoundTag("");
                        foreach (var chapter in Chapters)
                        {
                            langData.Add(new StringTag($"chapter.{chapter.Id}.title", chapter.Title));
                            if (chapter.Quests != null)
                            {
                                foreach (var quest in chapter.Quests)
                                {
                                    langData.Add(new StringTag($"quest.{quest.Id}.title", quest.Title));
                                    langData.Add(new StringTag($"quest.{quest.Id}.quest_subtitle", quest.SubTitle));
                                    var descLines = quest.Description.Split(new[] { Environment.NewLine }, StringSplitOptions.None);
                                    var descList = new ListTag($"quest.{quest.Id}.quest_desc",TagType.String);
                                    foreach (var line in descLines)
                                    {
                                        descList.Add(new StringTag(null, line));
                                    }
                                    langData.Add(descList);
                                }
                            }
                        }
                        SnbtWriter.SaveToFile(langData, filePath, prettyPrint: true);
                        MessageBox.Show("多语言文件保存成功！", "成功", MessageBoxButton.OK, MessageBoxImage.Information);
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show($"保存文件失败: {ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                    }
                }
            }
        }

        [RelayCommand]
        private void CreateNewQuest()
        { 

        }

        internal void ChapterSelectionChanged(ChapterModel selectedChapter)
        {
            if (selectedChapter != null && selectedChapter.Quests != null)
            {
                SelectedQuests = selectedChapter.Quests;
            }
            else
            {
                SelectedQuests = [];
            }

        }
        private string GetMutliLang(string type,string id,string docType)
        {
            return _langs?.FirstOrDefault(it => it.Type == type && it.Id == id && it.DocType == docType)?.Value ?? "";
        }
    }
}