using ChromeboxFanControl;

namespace ChromeboxFanControlService;

public sealed class FanControlWorker : BackgroundService
{
    private FanController? _fan;
    private AppConfig? _config;

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        _config = AppConfig.LoadMerged();
        _fan = new FanController(_config);
        _fan.Start();

        try
        {
            await Task.Delay(Timeout.Infinite, stoppingToken);
        }
        catch (OperationCanceledException)
        {
            /* shutdown */
        }
    }

    public override async Task StopAsync(CancellationToken cancellationToken)
    {
        _fan?.Stop();
        _fan?.Dispose();
        if (_config != null)
        {
            try
            {
                EctoolRunner.RunSync(_config.EctoolPath, _config.AutoFanCtrlArgs);
            }
            catch
            {
                /* best effort restore autofan on shutdown */
            }
        }
        await base.StopAsync(cancellationToken);
    }
}