using System.Diagnostics;
using System.Reflection;
using Avalonia.Controls;
using MsBox.Avalonia;
using MsBox.Avalonia.Enums;
using Pilz;
using Pilz.Extensions;
using Pilz.Runtime;
using Pilz.Updating.Client;

namespace ModpackUpdater.Apps;

public class AppUpdates(string appShortName, Window mainWindow)
{
    public const string UpdateUrl = "https://git.pilzinsel64.de/LITW-Refined/minecraft-modpack-updater/raw/branch/updates/updates.json";
    
    public event EventHandler? OnDownloadProgramUpdate;
    
    public bool UsePopups { get; set; }
    
    public async Task UpdateApp()
    {
#if DISABLE_UPDATE
        await Task.CompletedTask;
#else
        try
        {
            await UpdateAppCore();
        }
        catch (Exception ex)
        {
            await MessageBoxManager.GetMessageBoxStandard(GeneralMsgBoxLangRes.UpdateAvailable_Title, string.Format(GeneralMsgBoxLangRes.UpdateAvailable, ex.Message), ButtonEnum.YesNo, MsBox.Avalonia.Enums.Icon.Info).ShowWindowAsync();
            mainWindow.IsEnabled = true;
        }
#endif
    }
    
    private async Task UpdateAppCore()
    {
        if (Debugger.IsAttached)
            return;
        
        var myAppPath = EnvironmentEx.ProcessPath!;
        var updater = new UpdateClient(UpdateUrl, Assembly.GetEntryAssembly()!.GetAppVersion(), AppChannel.Stable)
        {
            Distro = $"{appShortName}-{RuntimeInformationsEx.GetRuntimeIdentifier()}",
        };

        if (await updater.CheckForUpdate() is not { } packageToInstall || await AskForUpdate() != ButtonResult.Yes)
            return;
        
        OnDownloadProgramUpdate?.Invoke(this, EventArgs.Empty);
        mainWindow.IsEnabled = false;
        
        if (await updater.DownloadPackageAsync(packageToInstall) && await updater.InstallPackageAsync(packageToInstall, myAppPath))
        {
            mainWindow.IsVisible = false;
            await Process.Start(myAppPath).WaitForExitAsync();
            Environment.Exit(0);
            return;
        }

        mainWindow.IsEnabled = true;
    }

    private Task<ButtonResult> AskForUpdate()
    {
        var msgBox = MessageBoxManager.GetMessageBoxStandard(GeneralMsgBoxLangRes.UpdateAvailable_Title, GeneralMsgBoxLangRes.UpdateAvailable, ButtonEnum.YesNo, Icon.Info);
        if (UsePopups)
            return msgBox.ShowAsPopupAsync(mainWindow);
        return msgBox.ShowWindowDialogAsync(mainWindow);
    }
}