import { registry } from "#lib/server/metrics.ts";
import type { DataPoint } from "#lib/server/otlp.ts";

export const points = (name: string, labels: Record<string, string> = {}): DataPoint[] => {
	const [{ metrics }] = registry.payload({}, 0n, 0n).resourceMetrics[0].scopeMetrics;
	const metric = metrics.find((m) => m.name === name);
	const dataPoints = (metric?.sum ?? metric?.histogram ?? metric?.gauge)?.dataPoints ?? [];
	return dataPoints.filter((p) =>
		Object.entries(labels).every(([key, value]) =>
			p.attributes?.some((a) => a.key === key && a.value.stringValue === value)
		)
	);
};

export const total = (name: string, labels: Record<string, string> = {}): number =>
	points(name, labels).reduce((sum, p) => sum + Number(p.asInt ?? p.count), 0);