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1import { describe, expect, it } from "vitest";
2import { appendLivePoint, hasAnyValue, seriesStats } from "@/lib/client/metrics-history";
3import type { MetricsHistoryPoint } from "@/lib/shared/contracts/system";
4
5const T0 = Date.UTC(2026, 8, 27, 12, 0, 0);
6
7function point(t: number, cpu: number | null, temperature: number | null = null): MetricsHistoryPoint {
8  return { t, cpuPercent: cpu, memoryPercent: 40, temperatureCelsius: temperature, downloadMbps: 1, uploadMbps: 1, diskReadMBps: null, diskWriteMBps: null };
9}
10
11describe("appendLivePoint", () => {
12  it("adds a live frame only at the 5 s cadence", () => {
13    const start = [point(T0, 10)];
14    expect(appendLivePoint(start, point(T0 + 2_000, 20))).toBe(start);
15    expect(appendLivePoint(start, point(T0 + 5_000, 20)).map((p) => p.cpuPercent)).toEqual([10, 20]);
16  });
17
18  it("keeps only the chosen range for the 15 min view", () => {
19    const points = [point(T0, 1), point(T0 + 10 * 60_000, 2)];
20    const next = appendLivePoint(points, point(T0 + 16 * 60_000, 3), 15 * 60_000);
21    expect(next.map((p) => p.cpuPercent)).toEqual([2, 3]);
22  });
23
24  it("drops points that fall out of the hour", () => {
25    const points = [point(T0, 1), point(T0 + 30 * 60_000, 2)];
26    const next = appendLivePoint(points, point(T0 + 60 * 60_000 + 1_000, 3));
27    expect(next.map((p) => p.cpuPercent)).toEqual([2, 3]);
28  });
29});
30
31describe("seriesStats", () => {
32  it("reports current, average and peak and skips missing readings", () => {
33    const points = [point(T0, 10), point(T0 + 5_000, null), point(T0 + 10_000, 40), point(T0 + 15_000, 25)];
34    expect(seriesStats(points, "cpuPercent")).toEqual({ current: 25, average: 25, peak: 40 });
35  });
36
37  it("returns nulls and no value when a host has no reading", () => {
38    const points = [point(T0, 10), point(T0 + 5_000, 20)];
39    expect(seriesStats(points, "temperatureCelsius")).toEqual({ current: null, average: null, peak: null });
40    expect(hasAnyValue(points, "temperatureCelsius")).toBe(false);
41    expect(hasAnyValue([point(T0, 1, 55)], "temperatureCelsius")).toBe(true);
42  });
43});
44