import { describe, expect, it } from "vitest";
import {
  buildDemoStringPreview,
  formatDemoDurationFromMillis,
  parseDemoTtlToSeconds,
  persistDemoKeyTtl,
  updateDemoKeyTtl,
  updateDemoStringValue,
  type DemoWorkspaceKey,
} from "./demo-workspace";

const demoKeys: DemoWorkspaceKey[] = [
  {
    id: "cache:homepage",
    name: "cache:homepage",
    type: "string",
    ttl: "48s",
    preview: "serialized landing payload",
    editable: true,
    value: "{\"hero\":\"Redis GUI\"}",
    summary: "String keys are editable in V1.",
  },
];

describe("demo workspace helpers", () => {
  it("updates string values and refreshes the visible preview", () => {
    expect(
      updateDemoStringValue(demoKeys, "cache:homepage", "next value"),
    ).toEqual([
      {
        ...demoKeys[0],
        value: "next value",
        preview: "next value",
      },
    ]);
  });

  it("updates TTL state for session-local demo flows", () => {
    expect(updateDemoKeyTtl(demoKeys, "cache:homepage", 90_000)[0]?.ttl).toBe("1m");
    expect(persistDemoKeyTtl(demoKeys, "cache:homepage")[0]?.ttl).toBe("persistent");
  });

  it("formats preview text and durations consistently", () => {
    expect(buildDemoStringPreview("alpha beta gamma delta epsilon zeta eta theta", 16)).toBe(
      "alpha beta gamm…",
    );
    expect(formatDemoDurationFromMillis(750)).toBe("750ms");
    expect(formatDemoDurationFromMillis(5_000)).toBe("5s");
    expect(formatDemoDurationFromMillis(7_200_000)).toBe("2h");
    expect(parseDemoTtlToSeconds("750ms")).toBe(0);
    expect(parseDemoTtlToSeconds("5s")).toBe(5);
    expect(parseDemoTtlToSeconds("2h")).toBe(7200);
    expect(parseDemoTtlToSeconds("persistent")).toBe(-1);
  });
});