using ReactiveUI;
using Serilog;
using SPTInstaller.Helpers;
using System.Diagnostics;
using System.Threading.Tasks;

namespace SPTInstaller.Models;
public class InstallerUpdateInfo : ReactiveObject
{
    private Version? _newVersion;

    public string NewInstallerUrl = "";

    private string _updateInfoText = "";
    public string UpdateInfoText
    {
        get => _updateInfoText;
        set => this.RaiseAndSetIfChanged(ref _updateInfoText, value);
    }

    private bool _show = false;
    public bool Show
    {
        get => _show;
        set => this.RaiseAndSetIfChanged(ref _show, value);
    }

    private bool _updating = false;
    public bool Updating
    {
        get => _updating;
        set => this.RaiseAndSetIfChanged(ref _updating, value);
    }

    private bool _updateAvailable = false;
    public bool UpdateAvailable
    {
        get => _updateAvailable;
        set => this.RaiseAndSetIfChanged(ref _updateAvailable, value);
    }

    private bool _checkingForUpdates = false;
    public bool CheckingForUpdates
    {
        get => _checkingForUpdates;
        set => this.RaiseAndSetIfChanged(ref _checkingForUpdates, value);
    }

    private int _downloadProgress;
    public int DownloadProgress
    {
        get => _downloadProgress;
        set => this.RaiseAndSetIfChanged(ref _downloadProgress, value);
    }

    public async Task UpdateInstaller()
    {
        Updating = true;
        UpdateAvailable = false;
        
        var updater = new FileInfo(Path.Join(DownloadCacheHelper.CachePath, "update.ps1"));

        if (!FileHelper.StreamAssemblyResourceOut("update.ps1", updater.FullName))
        {
            Log.Fatal("Failed to prepare update file");
            return;
        }


        if (!updater.Exists)
        {
            UpdateInfoText = "Failed to get updater from resources :(";
            return;
        }

        var newInstallerPath = await DownloadNewInstaller();

        if(string.IsNullOrWhiteSpace(newInstallerPath))
            return;

        Process.Start(new ProcessStartInfo
        {
            FileName = "powershell.exe",
            ArgumentList = { "-ExecutionPolicy", "Bypass", "-File", $"{updater.FullName}", $"{newInstallerPath}", $"{Path.Join(Environment.CurrentDirectory, "SPTInstaller.exe")}" }
        });
    }

    private async Task<string> DownloadNewInstaller()
    {
        UpdateInfoText = $"Downloading installer v{_newVersion}";

        var progress = new Progress<double>(x => DownloadProgress = (int)x);

        var file = await DownloadCacheHelper.DownloadFileAsync("SPTInstller.exe", NewInstallerUrl, progress);

        if (file == null || !file.Exists)
        {
            UpdateInfoText = "Failed to download new installer :(";
            return "";
        }

        return file.FullName;
    }

    private void EndCheck(string infoText, bool updateAvailable, bool log = true)
    {
        if (log)
        {
            Log.Information(infoText);
        }
        
        UpdateInfoText = infoText;
        Show = updateAvailable;
        CheckingForUpdates = false;
        UpdateAvailable = updateAvailable;
    }

    // public async Task CheckForUpdates(Version? currentVersion)
    // {
    //     if (currentVersion == null)
    //         return;
    //
    //     UpdateInfoText = "Checking for installer updates";
    //     Show = true;
    //     CheckingForUpdates = true;
    //
    //     try
    //     {
    //         var repo = new RepositoryApi(Configuration.Default);
    //
    //         var releases = await repo.RepoListReleasesAsync("CWX", "SPT-AKI-Installer");
    //
    //         if (releases == null || releases.Count == 0)
    //         {
    //             EndCheck("No releases available", false);
    //             return;
    //         }
    //
    //         var latest = releases.FindAll(x => !x.Prerelease)[0];
    //
    //         if (latest == null)
    //         {
    //             EndCheck("could not get latest release", false);
    //             return;
    //         }
    //
    //         var latestVersion = new Version(latest.TagName);
    //
    //         if (latestVersion == null || latestVersion <= currentVersion)
    //         {
    //             EndCheck("No updates available", false);
    //             return;
    //         }
    //
    //         _newVersion = latestVersion;
    //
    //         NewInstallerUrl = latest.Assets[0].BrowserDownloadUrl;
    //
    //         EndCheck($"Update available: v{latestVersion}", true);
    //
    //         return;
    //     }
    //     catch (Exception ex)
    //     {
    //         EndCheck(ex.Message, false, false);
    //         Log.Error(ex, "Failed to check for updates");
    //     }
    //
    //     return;
    // }
}