import z from "zod";

/**
 * Telemetry-instrument declarations. The host pre-registers each named
 * counter/histogram/gauge so plugin code can emit without first
 * round-tripping through a registration call.
 */
const instrumentSchema = z.object({
    name: z.string().min(1),
    labels: z.array(z.string().min(1)).readonly().optional(),
});

export const telemetrySchema = z.object({
    metricPrefix: z.string().min(1).optional(),
    spanPrefix: z.string().min(1).optional(),
    counters: z.array(instrumentSchema).readonly().optional(),
    histograms: z.array(instrumentSchema).readonly().optional(),
    gauges: z.array(instrumentSchema).readonly().optional(),
});

export type Telemetry = z.infer<typeof telemetrySchema>;