config

type Metrics struct {
	// Sets whether or not to enable the Prometheus metrics exporter
	OtelPrometheusExporterEnabled bool `env:"OTEL_PROM_EXPORTER_ENABLED" envDefault:"true"`
	// Sets the port which the Prometheus compatible metrics endpoint should be served on
	OtelPrometheusExporterPort int `env:"OTEL_PROM_EXPORTER_PORT" envDefault:"2223"`
	// Sets whether or not to enable the OTEL metrics exporter
	OtelHTTPExporterEnabled bool `env:"OTEL_EXPORTER_OTLP_METRICS_ENABLED" envDefault:"false"`
}

type Serving struct {
	// WatchNamespace is the namespace to watch for new HTTPScaledObjects.
	// Leave this empty to watch HTTPScaledObjects in all namespaces.
	WatchNamespace string `env:"KEDA_HTTP_WATCH_NAMESPACE" envDefault:""`
	// ProxyPort is the port that the public proxy should run on
	ProxyPort int `env:"KEDA_HTTP_PROXY_PORT,required"`
	// AdminPort is the port that the internal admin server should run on.
	// This is the server that the external scaler will issue metrics
	// requests to
	AdminPort int `env:"KEDA_HTTP_ADMIN_PORT,required"`
	// CacheSyncPeriod is the time interval for the controller-runtime cache to resync.
	// TODO: consider removing this to use the default value, otherwise align the env var name
	CacheSyncPeriod time.Duration `env:"KEDA_HTTP_SCALER_CONFIG_MAP_INFORMER_RSYNC_PERIOD" envDefault:"60m"`
	// ProxyTLSEnabled is a flag to specify whether the interceptor proxy should
	// be running using a TLS enabled server
	ProxyTLSEnabled bool `env:"KEDA_HTTP_PROXY_TLS_ENABLED" envDefault:"false"`
	// TLSCertPath is the path to read the certificate file from for the TLS server
	TLSCertPath string `env:"KEDA_HTTP_PROXY_TLS_CERT_PATH" envDefault:"/certs/tls.crt"`
	// TLSKeyPath is the path to read the private key file from for the TLS server
	TLSKeyPath string `env:"KEDA_HTTP_PROXY_TLS_KEY_PATH" envDefault:"/certs/tls.key"`
	// TLSCertStorePaths is a comma separated list of paths to read the certificate/key pairs for the TLS server
	TLSCertStorePaths string `env:"KEDA_HTTP_PROXY_TLS_CERT_STORE_PATHS" envDefault:""`
	// TLSSkipVerify is a boolean flag to specify whether the interceptor should skip TLS verification for upstreams
	TLSSkipVerify bool `env:"KEDA_HTTP_PROXY_TLS_SKIP_VERIFY" envDefault:"false"`
	// TLSPort is the port that the server should serve on if TLS is enabled
	TLSPort int `env:"KEDA_HTTP_PROXY_TLS_PORT" envDefault:"8443"`
	// TLSMinVersion is the minimum TLS version to accept ("1.2" or "1.3").
	// If empty, the Go default is used (currently TLS 1.2).
	TLSMinVersion string `env:"KEDA_HTTP_PROXY_TLS_MIN_VERSION" envDefault:""`
	// TLSMaxVersion is the maximum TLS version to accept ("1.2" or "1.3").
	// Defaults to the highest version supported by crypto/tls if empty.
	TLSMaxVersion string `env:"KEDA_HTTP_PROXY_TLS_MAX_VERSION" envDefault:""`
	// TLSCipherSuites is a comma-separated list of TLS cipher suite names
	// (e.g. "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384").
	// If empty, the default Go cipher suites are used.
	TLSCipherSuites string `env:"KEDA_HTTP_PROXY_TLS_CIPHER_SUITES" envDefault:""`
	// TLSCurvePreferences is a comma-separated list of elliptic curve names
	// (e.g. "X25519,CurveP256"). If empty, the default Go curve preferences are used.
	TLSCurvePreferences string `env:"KEDA_HTTP_PROXY_TLS_CURVE_PREFERENCES" envDefault:""`
	// ProfilingAddr if not empty, pprof will be available on this address, assuming host:port here
	ProfilingAddr string `env:"PROFILING_BIND_ADDRESS" envDefault:""`
	// EnableColdStartHeader enables/disables the X-KEDA-HTTP-Cold-Start response header
	EnableColdStartHeader bool `env:"KEDA_HTTP_ENABLE_COLD_START_HEADER" envDefault:"true"`
	// LogRequests enables/disables logging of incoming requests
	LogRequests bool `env:"KEDA_HTTP_LOG_REQUESTS" envDefault:"false"`
}

type Timeouts struct {
	// Request is the total wall-clock deadline from request arrival to response completion.
	// When 0 (the default), there is no total request deadline.
	Request time.Duration `env:"KEDA_HTTP_REQUEST_TIMEOUT" envDefault:"0s"`
	// ResponseHeader is how long to wait between when the HTTP request
	// is sent to the backing app and when response headers need to arrive.
	// Defaults to 300s as a safety net against hung backends. Set to 0 to disable.
	ResponseHeader time.Duration `env:"KEDA_HTTP_RESPONSE_HEADER_TIMEOUT" envDefault:"300s"`
	// Readiness is how long to wait for the backing workload
	// to have 1 or more replicas before connecting and sending the HTTP request.
	// When 0 (the default), the readiness wait is bounded only by the request
	// timeout, giving the full request budget to cold starts. When a fallback
	// service is configured and this is 0, a 30s default is applied.
	Readiness time.Duration `env:"KEDA_HTTP_READINESS_TIMEOUT" envDefault:"0s"`
	// Connect is the per-attempt TCP dial timeout (net.Dialer.Timeout).
	// Bounded by the request context deadline.
	Connect time.Duration `env:"KEDA_HTTP_CONNECT_TIMEOUT" envDefault:"500ms"`

	// MaxIdleConns is the max number of idle connections to keep in the
	// interceptor's internal connection pool across all backend services.
	// Increase this if you proxy to many unique backend services.
	MaxIdleConns int `env:"KEDA_HTTP_MAX_IDLE_CONNS" envDefault:"1000"`
	// MaxIdleConnsPerHost is the max number of idle connections to keep per backend service.
	// Increase this if you observe many new connection establishments under load.
	MaxIdleConnsPerHost int `env:"KEDA_HTTP_MAX_IDLE_CONNS_PER_HOST" envDefault:"200"`
	// ForceHTTP2 toggles whether to try to force HTTP2 for all requests.
	ForceHTTP2 bool `env:"KEDA_HTTP_FORCE_HTTP2" envDefault:"false"`
}

type Tracing struct {
	// States whether tracing should be enabled, False by default
	Enabled bool `env:"OTEL_EXPORTER_OTLP_TRACES_ENABLED" envDefault:"false"`
	// Sets what tracing export to use, must be one of: console, http/protobuf, grpc
	Exporter string `env:"OTEL_EXPORTER_OTLP_TRACES_PROTOCOL" envDefault:"console"`
}