import { describe, it, expect } from "vitest";
import {
  deriveEnabledWidgets,
  defaultLayoutFromWidgets,
  isMetricCardId,
  isManagerCardId,
  METRIC_CARD_IDS,
} from "../../types/host-metrics.js";

describe("deriveEnabledWidgets", () => {
  it("returns only metric ids, in canonical order, deduped", () => {
    const slots = [
      { id: "firewall" },
      { id: "cpu" },
      { id: "cpu" },
      { id: "memory" },
    ];
    expect(deriveEnabledWidgets(slots)).toEqual(["cpu", "memory", "firewall"]);
  });

  it("excludes manager card ids (mobile contract: never leak managers)", () => {
    const slots = [
      { id: "cpu" },
      { id: "service_manager" },
      { id: "log_viewer" },
      { id: "disk" },
    ];
    const out = deriveEnabledWidgets(slots);
    expect(out).toEqual(["cpu", "disk"]);
    for (const id of out) expect(isMetricCardId(id)).toBe(true);
  });

  it("output is always a subset of the 10 known WidgetTypes", () => {
    const slots = METRIC_CARD_IDS.map((id) => ({ id })).concat([
      { id: "user_manager" } as { id: (typeof METRIC_CARD_IDS)[number] },
      { id: "bogus" } as { id: (typeof METRIC_CARD_IDS)[number] },
    ]);
    const out = deriveEnabledWidgets(slots);
    expect(out).toEqual(METRIC_CARD_IDS);
    expect(out.length).toBe(METRIC_CARD_IDS.length);
  });

  it("empty slots -> empty widgets", () => {
    expect(deriveEnabledWidgets([])).toEqual([]);
  });
});

describe("defaultLayoutFromWidgets", () => {
  it("builds slots in canonical order with dense ordering", () => {
    const layout = defaultLayoutFromWidgets(["disk", "cpu", "memory"]);
    expect(layout.slots.map((s) => s.id)).toEqual(["cpu", "memory", "disk"]);
    expect(layout.slots.map((s) => s.order)).toEqual([0, 1, 2]);
    expect(layout.columns).toBe(3);
  });

  it("ignores unknown widget ids", () => {
    const layout = defaultLayoutFromWidgets(["cpu", "nope", "service_manager"]);
    expect(layout.slots.map((s) => s.id)).toEqual(["cpu"]);
  });

  it("assigns valid colSpans (1..3)", () => {
    const layout = defaultLayoutFromWidgets([...METRIC_CARD_IDS]);
    for (const s of layout.slots) {
      expect([1, 2, 3]).toContain(s.colSpan);
    }
  });

  it("round-trips: deriveEnabledWidgets(defaultLayout) === input order", () => {
    const layout = defaultLayoutFromWidgets(["ports", "cpu", "firewall"]);
    expect(deriveEnabledWidgets(layout.slots)).toEqual([
      "cpu",
      "ports",
      "firewall",
    ]);
  });
});

describe("card id guards", () => {
  it("classifies metric vs manager ids", () => {
    expect(isMetricCardId("cpu")).toBe(true);
    expect(isMetricCardId("service_manager")).toBe(false);
    expect(isManagerCardId("service_manager")).toBe(true);
    expect(isManagerCardId("cpu")).toBe(false);
  });
});