using FabApprovalWorkerService.Models;

namespace FabApprovalWorkerService.Services;

public class WindowsService : BackgroundService {
    private readonly ILogger<WindowsService> _logger;
    private readonly IMonInWorkerClient _monInClient;

    public WindowsService(ILogger<WindowsService> logger,
                          IServiceProvider serviceProvider) {
        _logger = logger ??
            throw new ArgumentNullException("ILogger not injected");
        using (IServiceScope scope = serviceProvider.CreateScope()) {
            _monInClient = scope.ServiceProvider.GetService<IMonInWorkerClient>() ??
                throw new ArgumentNullException("IMonInWorkerClient not injected");
        }
    }

    protected override async Task ExecuteAsync(CancellationToken stoppingToken) {
        _logger.LogInformation("Starting Windows service");

        try {
            while (!stoppingToken.IsCancellationRequested) {
                await Task.Delay(TimeSpan.FromMinutes(5), stoppingToken);

                _monInClient.PostStatus("WindowsService", StatusValue.Ok);
            }
        } catch (OperationCanceledException) {
            _logger.LogError("The Windows service has been stopped");

            _monInClient.PostStatus("WindowsService", StatusValue.Critical);
        } catch (Exception ex) {
            _logger.LogError($"An exception occurred when running Windows Service. Exception: {ex.Message}");

            _monInClient.PostStatus("WindowsService", StatusValue.Critical);

            Environment.Exit(1);
        }
    }
}