monitor

var (
	// ErrCPUInfoNotReady indicates CPU information is not yet available from background sampling.
	ErrCPUInfoNotReady = errors.New("cpu info not ready")
	// ErrProcessInfoNotReady indicates process information is not yet available from background sampling.
	ErrProcessInfoNotReady = errors.New("process info not ready")
)

var Module = fx.Module(
	"vef:monitor",
	fx.Provide(

		fx.Annotate(
			NewService,
			fx.ParamTags(`optional:"true"`, `optional:"true"`),
			fx.OnStart(func(ctx context.Context, svc monitor.Service) error {
				if initializer, ok := svc.(contract.Initializer); ok {
					if err := initializer.Init(ctx); err != nil {
						return fmt.Errorf("failed to initialize monitor service: %w", err)
					}
				}

				return nil
			}),
			fx.OnStop(func(svc monitor.Service) error {
				if closer, ok := svc.(io.Closer); ok {
					if err := closer.Close(); err != nil {
						return fmt.Errorf("failed to close monitor service: %w", err)
					}
				}

				return nil
			}),
		),

		fx.Annotate(
			NewResource,
			fx.ParamTags(``, `optional:"true"`),
			fx.ResultTags(`group:"vef:api:resources"`),
		),
	),
)