using Avalonia.Controls;
using Avalonia.Interactivity;
using Avalonia.Media;
using Avalonia.Platform.Storage;
using ModpackUpdater.Apps.Client.Gui.LangRes;
using ModpackUpdater.Manager;
using MsBox.Avalonia;
using MsBox.Avalonia.Enums;
using Pilz.Extensions;
using Pilz.SymbolPacks.Sets;
using Pilz.UI.AvaloniaUI.Symbols;
using System.Diagnostics;
using System.Reflection;
using Pilz.UI.Symbols;

namespace ModpackUpdater.Apps.Client.Gui;

public partial class MainForm : Window
{
    private readonly UpdateCheckOptions updateOptions = new();
    private ModpackInfo modpackInfo = new();
    private ModpackConfig updateConfig = new();
    private ModpackFeatures? features;
    private UpdateCheckResult? lastUpdateCheckResult;
    private bool currentUpdating;
    private bool loadingData;
    private int curOptionsRow = 3;

    public MainForm()
    {
        InitializeComponent();

        Title = $"{Title} (v{Assembly.GetExecutingAssembly().GetAppVersion()})";

        Closing += MainForm_Closing;
        Loaded += MainForm_Loaded;

        ButtonSearchProfileFolder.ImageSource = Symbols.Fluent.GetImageSource(SymbolsFluent.opened_folder);
        ButtonCheckForUpdates.ImageSource = Symbols.Fluent.GetImageSource(SymbolsFluent.update);
        ButtonInstall.ImageSource = Symbols.Fluent.GetImageSource(SymbolsFluent.software_installer);
        MenuItemRepair.Icon = Symbols.Fluent.GetImage(SymbolsFluent.wrench, SymbolSize.Small);

        ClearStatus();
        LoadProfileToUi();
    }

    #region Features

    private void SetStatus(string statusText, IImage? image)
    {
        TextStatus.Text = statusText;
        ImageStatus.Source = image;
    }

    private void ClearStatus()
    {
        TextStatus.Text = "-";
        ImageStatus.Source = null;
    }

    private void LoadProfileToUi()
    {
        loadingData = true;

        TextBoxMinecraftProfileFolder.Text = modpackInfo?.LocaLPath ?? AppConfig.Instance.LastMinecraftProfilePath ?? TextBoxMinecraftProfileFolder.Text;
        TextBoxModpackConfig.Text = modpackInfo?.ConfigUrl ?? TextBoxModpackConfig.Text;
        TextBoxInstallKey.Text = modpackInfo?.ExtrasKey ?? TextBoxInstallKey.Text;

        loadingData = false;
    }

    private void LoadOptionsToUi()
    {
        //foreach (var set in )
        //{
        //    // ...
        //}
    }

    private async void CheckStatusAndUpdate(bool loadProfileToUi)
    {
        if (CheckStatus(loadProfileToUi))
            await ExecuteUpdate(false, false);
    }

    private bool CheckStatus(bool loadProfileToUi)
    {
        try
        {
            modpackInfo = ModpackInfo.TryLoad(TextBoxMinecraftProfileFolder.Text?.Trim());
        }
        catch
        {
        }

        if (loadProfileToUi)
            LoadProfileToUi();

        try
        {
            updateConfig = ModpackConfig.LoadFromUrl(TextBoxModpackConfig.Text);
        }
        catch (Exception)
        {
        }

        if (modpackInfo != null)
            features = new(updateConfig);

        LabelInstallKey.IsVisible = TextBoxInstallKey.IsVisible = !string.IsNullOrWhiteSpace(updateConfig.UnleashApiUrl);

        if (modpackInfo == null || string.IsNullOrWhiteSpace(TextBoxMinecraftProfileFolder.Text) /*|| modpackInfo.Valid*/)
        {
            SetStatus(GeneralLangRes.MinecraftProfileFolderSeemsInvalid, Symbols.Fluent.GetImageSource(SymbolsFluent.warning_shield));
            ButtonCheckForUpdates.IsEnabled = false;
            ButtonInstall.IsEnabled = false;
            return false;
        }
        else if (string.IsNullOrWhiteSpace(TextBoxModpackConfig.Text))
        {
            SetStatus(GeneralLangRes.ConfigIncompleteOrNotLoaded, Symbols.Fluent.GetImageSource(SymbolsFluent.warning_shield));
            ButtonCheckForUpdates.IsEnabled = false;
            ButtonInstall.IsEnabled = false;
            return false;
        }
        else if (updateConfig.Maintenance && !updateOptions.IgnoreMaintenance)
        {
            SetStatus(GeneralLangRes.UpdateServerInMaintenance, Symbols.Fluent.GetImageSource(SymbolsFluent.services));
            ButtonCheckForUpdates.IsEnabled = false;
            ButtonInstall.IsEnabled = false;
            return false;
        }
        LoadOptionsToUi();
        ButtonCheckForUpdates.IsEnabled = true;
        ButtonInstall.IsEnabled = true;
        return true;
    }

    private async Task ExecuteUpdate(bool doInstall, bool repair)
    {
        // Ensure set extras key
        modpackInfo.ExtrasKey = TextBoxInstallKey.Text?.Trim();

        var updater = new ModpackInstaller(updateConfig, modpackInfo);
        updater.InstallProgessUpdated += Update_InstallProgessUpdated;
        updater.CheckingProgressUpdated += Updated_CheckingProgresssUpdated;

        void error()
        {
            SetStatus(GeneralLangRes.ErrorOnUpdateCheckOrUpdating, Symbols.Fluent.GetImageSource(SymbolsFluent.close));
            currentUpdating = false;
        }
        void installing()
        {
            SetStatus(GeneralLangRes.Installing, Symbols.Fluent.GetImageSource(SymbolsFluent.software_installer));
            currentUpdating = true;
        }
        void updatesAvailable()
        {
            SetStatus(GeneralLangRes.AnUpdateIsAvailable, Symbols.Fluent.GetImageSource(SymbolsFluent.software_installer));
        }
        void everythingOk()
        {
            SetStatus(GeneralLangRes.EverythingIsRightAndUpToDate, Symbols.Fluent.GetImageSource(SymbolsFluent.done));
            currentUpdating = false;
        }

        // Check only if not pressed "install", not really needed otherwise.
        if (lastUpdateCheckResult is null || !doInstall || repair)
        {
            SetStatus(GeneralLangRes.CheckingForUpdates, Symbols.Fluent.GetImageSource(SymbolsFluent.update));

            // Check for extras once again
            updateOptions.IncludeExtras = features != null && features.IsEnabled(ModpackFeatures.FeatureAllowExtas, new AllowExtrasFeatureContext(modpackInfo));

            // Force re-install on repair
            updateOptions.IgnoreInstalledVersion = repair;

            try
            {
                lastUpdateCheckResult = await updater.Check(updateOptions);
            }
            catch (Exception)
            {
                error();
                if (Debugger.IsAttached)
                    throw;
            }
            finally
            {
            }
        }

        // Error while update check
        if (lastUpdateCheckResult is null || lastUpdateCheckResult.HasError)
        {
            error();
            return;
        }

        // Load options
        // lastUpdateCheckResult.OptionsAvailable...
        // lastUpdateCheckResult.OptionsEnabled...

        // No updates available
        if (!lastUpdateCheckResult.HasUpdates)
        {
            everythingOk();
            return;
        }

        // Updates available (but don't install)
        if (!doInstall)
        {
            updatesAvailable();
            return;
        }

        // Install updates
        installing();
        currentUpdating = true;
        try
        {
            // Install
            if (await updater.Install(lastUpdateCheckResult) == false)
            {
                error();
                return;
            }

            // Success
            lastUpdateCheckResult = null; // Reset last update check, a new one would be needed now.
            everythingOk();
        }
        catch (Exception)
        {
            // Error
            error();
            if (Debugger.IsAttached)
                throw;
        }
    }

    private void Updated_CheckingProgresssUpdated(int toCheck, int processed)
    {
        SetStatus(Math.Round(processed / (double)toCheck * 100d, 1) + "%", Symbols.Fluent.GetImageSource(SymbolsFluent.update));
    }

    private void Update_InstallProgessUpdated(UpdateCheckResult result, int processedSyncs)
    {
        int actionCount = result.Actions.Count;
        SetStatus(Math.Round(processedSyncs / (double)actionCount * 100d, 1) + "%", Symbols.Fluent.GetImageSource(SymbolsFluent.software_installer));
    }

    #endregion

    #region Gui

    private void MainForm_Closing(object? sender, WindowClosingEventArgs e)
    {
        AppConfig.Instance.LastMinecraftProfilePath = TextBoxMinecraftProfileFolder.Text?.Trim();
    }

    private async void MainForm_Loaded(object? sender, RoutedEventArgs e)
    {
        var updater = new AppUpdater(Program.UPDATE_URL);
        if (await updater.Check() && await MessageBoxManager.GetMessageBoxStandard(MsgBoxLangRes.UpdateAvailable_Title, MsgBoxLangRes.UpdateAvailable, ButtonEnum.YesNo).ShowWindowDialogAsync(this) == ButtonResult.Ok)
        {
            SetStatus(GeneralLangRes.DownloadProgramUpdate, Symbols.Fluent.GetImageSource(SymbolsFluent.software_installer));
            IsEnabled = false;
            await updater.Install();
            //Application.Restart(); // FIXME
            return;
        }
        CheckStatusAndUpdate(true);
    }

    private void TextBoxMinecraftProfileFolder_TextInserted(object? o, Avalonia.Input.TextInputEventArgs args)
    {
        if (!loadingData)
            CheckStatusAndUpdate(true);
    }

    private void TextBoxModpackConfig_TextInserted(object? o, Avalonia.Input.TextInputEventArgs args)
    {
        if (!loadingData)
            CheckStatusAndUpdate(false);
    }

    private void TextBoxInstallKey_TextInserted(object? o, Avalonia.Input.TextInputEventArgs args)
    {
        if (!loadingData)
            CheckStatusAndUpdate(false);
    }

    private async void ButtonSearchProfileFolder_Click(object? sender, RoutedEventArgs e)
    {
        var filePaths = await StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions
        {
            Title = GeneralLangRes.SelectMinecraftProfileFolder,
            SuggestedStartLocation = await StorageProvider.TryGetFolderFromPathAsync(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)),
            AllowMultiple = false,
        });

        if (filePaths.Count >= 1)
            TextBoxMinecraftProfileFolder.Text = filePaths[0].Path.ToString();
    }

    private async void ButtonCheckForUpdates_Click(object? sender, RoutedEventArgs e)
    {
        ClearStatus();
        await ExecuteUpdate(false, false);
    }

    private async void ButtonInstall_Click(object? sender, RoutedEventArgs e)
    {
        if (currentUpdating)
            return;
        
        ClearStatus();
        await ExecuteUpdate(true, false);
    }

    private async void MenuItemRepair_Click(object? sender, RoutedEventArgs e)
    {
        if (currentUpdating)
            return;
        
        ClearStatus();
        await ExecuteUpdate(true, true);
    }

    #endregion
}