import assert from "node:assert/strict";
import test from "node:test";

import {
  HOST_TELEMETRY_SCHEMA,
  telegrafBatchToHostTelemetry,
} from "../src/index.mjs";

test("normalizes a bounded Telegraf Linux batch", () => {
  const value = telegrafBatchToHostTelemetry({ metrics: [
    { name: "cpu", tags: { cpu: "cpu-total", host: "edge-01" }, fields: { usage_active: 21.5 }, timestamp: 1_777_000_000 },
    { name: "mem", tags: { host: "edge-01" }, fields: { total: 1024, available: 700, used: 324, used_percent: 31.64 }, timestamp: 1_777_000_000 },
    { name: "system", tags: { host: "edge-01" }, fields: { load1: 0.2, load5: 0.1, load15: 0.05, uptime: 120, n_users: 1 }, timestamp: 1_777_000_000 },
    { name: "net", tags: { interface: "eth0", host: "edge-01" }, fields: { bytes_recv: 100, bytes_sent: 200 }, timestamp: 1_777_000_000 },
    { name: "systemd_units", tags: { name: "nodedc-device-edge-channel.service", load: "loaded", active: "active", sub: "running" }, fields: { mem_current: 2048, restarts: 0, pid: 42 }, timestamp: 1_777_000_000 },
  ] }, {
    hostKey: "robot2b-b2-edge-vps",
    architecture: "x64",
    kernelRelease: "6.8.0",
    cpuModel: "KVM CPU",
    logicalProcessors: 1,
  });

  assert.equal(value.schemaVersion, HOST_TELEMETRY_SCHEMA);
  assert.equal(value.cpu.usagePercent, 21.5);
  assert.equal(value.memory.totalBytes, 1024);
  assert.equal(value.network[0].interface, "eth0");
  assert.equal(value.services[0].activeState, "active");
  assert.equal(Object.isFrozen(value), true);
});

test("rejects an oversized Telegraf batch", () => {
  assert.throws(
    () => telegrafBatchToHostTelemetry({ metrics: Array.from({ length: 513 }, () => ({})) }, { hostKey: "host-01" }),
    /host_telemetry_telegraf_batch_invalid/,
  );
});