const SERVICE_NAME_PATTERN = /^[a-z][a-z0-9-]*[a-z0-9]$/;

/**
 * Validates that `serviceName` is a valid service identifier (kebab-case),
 * safe to use as a URL path segment for routing. Shared between the client
 * (fail-fast at construction) and the aggregator (registration payload
 * validation).
 * @param serviceName the candidate service name
 * @throws {Error} if `serviceName` does not match the expected kebab-case format
 */
export function assertValidServiceName(serviceName: string): void {
	if (!SERVICE_NAME_PATTERN.test(serviceName)) {
		throw new Error(
			`Invalid service name "${serviceName}": expected kebab-case (e.g. "my-service").`,
		);
	}
}