var (
	SandboxPresenceMetric = prometheus.Metric{
		Name: "sandbox_presence",
		Type: prometheus.TypeGauge,
		Help: "Boolean metric set to 1 for each known sandbox.",
	}
	SandboxRunningMetric = prometheus.Metric{
		Name: "sandbox_running",
		Type: prometheus.TypeGauge,
		Help: "Boolean metric set to 1 for each running sandbox.",
	}
	SandboxCheckpointedMetric = prometheus.Metric{
		Name: "sandbox_checkpointed",
		Type: prometheus.TypeGauge,
		Help: "Boolean metric set to 1 for each checkpointed sandbox.",
	}
	SandboxRestoredMetric = prometheus.Metric{
		Name: "sandbox_restored",
		Type: prometheus.TypeGauge,
		Help: "Boolean metric set to 1 for each restored sandbox.",
	}
	SandboxMetadataMetric = prometheus.Metric{
		Name: "sandbox_metadata",
		Type: prometheus.TypeGauge,
		Help: "Key-value pairs about per-sandbox metadata.",
	}
	SandboxCapabilitiesMetric = prometheus.Metric{
		Name: "sandbox_capabilities",
		Type: prometheus.TypeGauge,
		Help: "Linux capabilities added within containers of the sandbox.",
	}
	SandboxCapabilitiesMetricLabel = "capability"
	SpecMetadataMetric             = prometheus.Metric{
		Name: "spec_metadata",
		Type: prometheus.TypeGauge,
		Help: "Key-value pairs about OCI spec metadata.",
	}
	SandboxCreationMetric = prometheus.Metric{
		Name: "sandbox_creation_time_seconds",
		Type: prometheus.TypeGauge,
		Help: "When the sandbox was created, as a unix timestamp in seconds.",
	}
	NumRunningSandboxesMetric = prometheus.Metric{
		Name: "num_sandboxes_running",
		Type: prometheus.TypeGauge,
		Help: "Number of sandboxes running at present.",
	}
	NumCannotExportSandboxesMetric = prometheus.Metric{
		Name: "num_sandboxes_broken_metrics",
		Type: prometheus.TypeGauge,
		Help: "Number of sandboxes from which we cannot export metrics.",
	}
	NumTotalSandboxesMetric = prometheus.Metric{
		Name: "num_sandboxes_total",
		Type: prometheus.TypeCounter,
		Help: "Counter of sandboxes that have ever been started.",
	}
	NumCheckpointedSandboxesMetric = prometheus.Metric{
		Name: "num_sandboxes_checkpointed",
		Type: prometheus.TypeCounter,
		Help: "Counter of sandboxes that have been checkpointed.",
	}
	NumRestoredSandboxesMetric = prometheus.Metric{
		Name: "num_sandboxes_restored",
		Type: prometheus.TypeCounter,
		Help: "Counter of sandboxes that have been restored.",
	}
)

var Metrics = []*prometheus.Metric{
	&SandboxPresenceMetric,
	&SandboxRunningMetric,
	&SandboxMetadataMetric,
	&SandboxCheckpointedMetric,
	&SandboxRestoredMetric,
	&SandboxCapabilitiesMetric,
	&SpecMetadataMetric,
	&SandboxCreationMetric,
	&NumRunningSandboxesMetric,
	&NumCannotExportSandboxesMetric,
	&NumTotalSandboxesMetric,
	&NumCheckpointedSandboxesMetric,
	&NumRestoredSandboxesMetric,
	&prometheus.ProcessStartTimeSeconds,
}

type Server struct {
	// Config is the main runsc configuration.
	Config *config.Config

	// ExporterPrefix is used as prefix for all metric names following Prometheus exporter convention.
	ExporterPrefix string

	// PIDFile, if set, will cause the metric server to write its own PID to this file after binding
	// to the requested address. The parent directory of this file must already exist.
	PIDFile string

	// ExposeProfileEndpoints, if true, exposes /runsc-metrics/profile-cpu and
	// /runsc-metrics/profile-heap to get profiling data about the metric server.
	ExposeProfileEndpoints bool

	// AllowUnknownRoot causes the metric server to keep running regardless of the existence of the
	// Config's root directory or the metric server's ability to access it.
	AllowUnknownRoot bool
}