const (
	FromStorageLabel = "from_storage"
	ToStorageLabel   = "to_storage"
)

var (
	KMSOperationsLatencyMetric = metrics.NewHistogramVec(
		&metrics.HistogramOpts{
			Namespace:      namespace,
			Subsystem:      subsystem,
			Name:           "kms_operations_latency_seconds",
			Help:           "KMS operation duration with gRPC error code status total.",
			StabilityLevel: metrics.ALPHA,

			Buckets: metrics.ExponentialBuckets(0.0001, 2, 20),
		},
		[]string{"provider_name", "method_name", "grpc_status_code"},
	)

	KeyIDHashTotal = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Namespace:      namespace,
			Subsystem:      subsystem,
			Name:           "key_id_hash_total",
			Help:           "Number of times a keyID is used split by transformation type, provider, and apiserver identity.",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"transformation_type", "provider_name", "key_id_hash", "apiserver_id_hash"},
	)

	KeyIDHashLastTimestampSeconds = metrics.NewGaugeVec(
		&metrics.GaugeOpts{
			Namespace:      namespace,
			Subsystem:      subsystem,
			Name:           "key_id_hash_last_timestamp_seconds",
			Help:           "The last time in seconds when a keyID was used.",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"transformation_type", "provider_name", "key_id_hash", "apiserver_id_hash"},
	)

	KeyIDHashStatusLastTimestampSeconds = metrics.NewGaugeVec(
		&metrics.GaugeOpts{
			Namespace:      namespace,
			Subsystem:      subsystem,
			Name:           "key_id_hash_status_last_timestamp_seconds",
			Help:           "The last time in seconds when a keyID was returned by the Status RPC call.",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"provider_name", "key_id_hash", "apiserver_id_hash"},
	)

	InvalidKeyIDFromStatusTotal = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Namespace:      namespace,
			Subsystem:      subsystem,
			Name:           "invalid_key_id_from_status_total",
			Help:           "Number of times an invalid keyID is returned by the Status RPC call split by error.",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"provider_name", "error"},
	)

	DekSourceCacheSize = metrics.NewGaugeVec(
		&metrics.GaugeOpts{
			Namespace:      namespace,
			Subsystem:      subsystem,
			Name:           "dek_source_cache_size",
			Help:           "" /* 182 byte string literal not displayed */,
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"provider_name"},
	)
)