type AuthorizerMetrics interface {
	// Request total and latency metrics
	RequestMetrics
	// Webhook count, latency, and fail open metrics
	WebhookMetrics
	// match condition metrics
	cel.MatcherMetrics
}

type NoopAuthorizerMetrics struct {
	NoopRequestMetrics
	NoopWebhookMetrics
	cel.NoopMatcherMetrics
}

type NoopRequestMetrics struct{}

type NoopWebhookMetrics struct{}

type RequestMetrics interface {
	// RecordRequestTotal increments the total number of requests for the webhook authorizer
	RecordRequestTotal(ctx context.Context, code string)

	// RecordRequestLatency measures request latency in seconds for webhooks. Broken down by status code.
	RecordRequestLatency(ctx context.Context, code string, latency float64)
}

type WebhookMetrics interface {
	// RecordWebhookEvaluation increments with each round-trip of a webhook authorizer.
	// result is one of:
	// - canceled: the call invoking the webhook request was canceled
	// - timeout: the webhook request timed out
	// - error: the webhook response completed and was invalid
	// - success: the webhook response completed and was well-formed
	RecordWebhookEvaluation(ctx context.Context, name, result string)
	// RecordWebhookDuration records latency for each round-trip of a webhook authorizer.
	// result is one of:
	// - canceled: the call invoking the webhook request was canceled
	// - timeout: the webhook request timed out
	// - error: the webhook response completed and was invalid
	// - success: the webhook response completed and was well-formed
	RecordWebhookDuration(ctx context.Context, name, result string, duration float64)
	// RecordWebhookFailOpen increments when a webhook timeout or error results in a fail open
	// of a request which has not been canceled.
	// result is one of:
	// - timeout: the webhook request timed out
	// - error: the webhook response completed and was invalid
	RecordWebhookFailOpen(ctx context.Context, name, result string)
}