using ReleaseUpdater.Common;

namespace Updater.Core;

/// <summary>
/// Управляет потоком обновлений: извлечение, установка, перезапуск.
/// </summary>
public sealed class UpdaterApp
{
    private readonly ILogger _log;
    private readonly IExtractor _extractor;
    private readonly IInstaller _installer;
    private readonly IProcessManager _proc;

    public UpdaterApp(ILogger log, IExtractor extractor, IInstaller installer, IProcessManager proc)
    {
        _log = log;
        _extractor = extractor;
        _installer = installer;
        _proc = proc;
    }

    /// <summary>Запускает рабочий процесс обновления.</summary>
    public int Run(Options opts)
    {
        var tempExtractDir = Path.Combine(Path.GetTempPath(), $"upd_extract_{Guid.NewGuid():N}");
        Directory.CreateDirectory(tempExtractDir);

        try
        {
            _extractor.Extract(opts.ZipPath, tempExtractDir);
        }
        catch (Exception ex)
        {
            _log.Error($"Extraction failed: {ex.Message}");
            Cleanup(tempExtractDir);
            return ExitCodes.ExtractFailed;
        }

        try
        {
            _installer.Install(tempExtractDir, opts.InstallPath);
        }
        catch (Exception ex)
        {
            _log.Error($"Install failed: {ex.Message}");
            Cleanup(tempExtractDir);
            return ExitCodes.InstallFailed;
        }

        Cleanup(tempExtractDir);

        try
        {
            _proc.StartApp(opts.InstallPath, opts.AppExe, opts.RestartDelayMs);
            return ExitCodes.Ok;
        }
        catch (Exception ex)
        {
            _log.Error($"Restart failed: {ex.Message}");
            return ExitCodes.RestartFailed;
        }
    }

    private static void Cleanup(string dir)
    {
        try { Directory.Delete(dir, true); } catch { /* ignore */ }
    }
}