// @vitest-environment jsdom
//
// docs/DESIGN.md "Copy": a relative time in a list carries the exact moment on hover.
import { afterEach, describe, expect, it } from "vitest";
import { cleanup, render } from "@testing-library/react";
import { formatDateTime, formatDateTimeSec, relativeTime } from "../../lib/format";
import i18n from "../../i18n"; // the real instance, in English: the component names time in the UI language
import { RelativeTime } from "./RelativeTime";

afterEach(cleanup);

const THREE_DAYS_AGO = new Date(Date.now() - 3 * 86400_000).toISOString();

describe("RelativeTime", () => {
  it("says how long ago, and names the exact minute on hover", () => {
    const { container } = render(<RelativeTime at={THREE_DAYS_AGO} />);
    const el = container.querySelector("time")!;
    expect(el.textContent).toBe(relativeTime(THREE_DAYS_AGO, "en", i18n.t));
    expect(el.getAttribute("title")).toBe(formatDateTime(THREE_DAYS_AGO, "en"));
    expect(el.getAttribute("dateTime")).toBe(THREE_DAYS_AGO);
  });

  it("takes epoch millis, and the log form with seconds", () => {
    const ms = Date.parse(THREE_DAYS_AGO);
    const { container } = render(<RelativeTime at={ms} seconds />);
    expect(container.querySelector("time")!.getAttribute("title")).toBe(
      formatDateTimeSec(THREE_DAYS_AGO, "en"),
    );
  });

  it("shows the placeholder for a missing or unreadable moment, never a bare title", () => {
    const { container } = render(
      <>
        <RelativeTime at={null} empty="—" />
        <RelativeTime at="not a date" />
      </>,
    );
    expect(container.textContent).toBe("—");
    expect(container.querySelector("time")).toBeNull();
  });
});