observability

var (
	KeyListenPath, _             = tag.NewKey("path")
	KeyUpstreamPath, _           = tag.NewKey("upstream_path")
	KeyJWTValidationErrorType, _ = tag.NewKey("error")
)

var (
	MJWTManagerValidationErrors = stats.Int64(
		"plugin_jwt_manager_validation_error_total",
		"Number of validation errors by error type",
		dimensionless,
	)
	MOAuth2MissingHeader = stats.Int64(
		"plugin_oauth2_missing_header_total",
		"Number of failed oauth2 authentication due to missing header",
		dimensionless,
	)
	MOAuth2MalformedHeader = stats.Int64(
		"plugin_oauth2_malformed_header_total",
		"Number of failed oauth2 authentication due to malformed bearer header",
		dimensionless,
	)
	MOAuth2Authorized = stats.Int64(
		"plugin_oauth2_authorized_request_total",
		"Number of successful and authorized oauth2 authentication",
		dimensionless,
	)
	MOAuth2Unauthorized = stats.Int64(
		"plugin_oauth2_unauthorized_request_total",
		"Number of successful but unauthorized oauth2 authentication",
		dimensionless,
	)
)

var AllViews = []*view.View{
	{
		Name:        "plugin_jwt_manager_validation_error_total",
		TagKeys:     []tag.Key{KeyJWTValidationErrorType},
		Measure:     MJWTManagerValidationErrors,
		Aggregation: view.Count(),
	},
	{
		Name:        "plugin_oauth2_missing_header_total",
		Measure:     MOAuth2MissingHeader,
		Aggregation: view.Count(),
	},
	{
		Name:        "plugin_oauth2_malformed_header_total",
		Measure:     MOAuth2MalformedHeader,
		Aggregation: view.Count(),
	},
	{
		Name:        "plugin_oauth2_authorized_request_total",
		Measure:     MOAuth2Authorized,
		Aggregation: view.Count(),
	},
	{
		Name:        "plugin_oauth2_unauthorized_request_total",
		Measure:     MOAuth2Unauthorized,
		Aggregation: view.Count(),
	},
	{
		Name:        "http_server_response_count_by_path_code_and_method",
		TagKeys:     []tag.Key{KeyListenPath, ochttp.StatusCode, ochttp.Method},
		Measure:     ochttp.ServerLatency,
		Aggregation: view.Count(),
	},
	{
		Name:        "http_server_request_latency_by_path_and_method",
		TagKeys:     []tag.Key{KeyListenPath, ochttp.Method},
		Measure:     ochttp.ServerLatency,
		Aggregation: ochttp.DefaultLatencyDistribution,
	},
	{
		Name:        "http_server_request_size",
		Measure:     ochttp.ServerRequestBytes,
		Aggregation: ochttp.DefaultSizeDistribution,
	},
	{
		Name:        "http_proxy_request_count_by_path",
		TagKeys:     []tag.Key{KeyUpstreamPath},
		Measure:     ochttp.ClientRequestCount,
		Aggregation: view.Count(),
	},
	{
		Name:        "http_proxy_request_latency_by_path",
		TagKeys:     []tag.Key{KeyUpstreamPath},
		Measure:     ochttp.ClientLatency,
		Aggregation: ochttp.DefaultLatencyDistribution,
	},
}

var PrometheusExporter *prometheus.Exporter