import test from "node:test";
import assert from "node:assert/strict";
import fs from "node:fs";
import path from "node:path";
import configureEleventy from "../eleventy.config.js";
import { formatBuildAge } from "../src/assets/js/build-timer.js";

test("Build age: formats elapsed time as a compact live footer value", () => {
  assert.equal(
    formatBuildAge("2026-10-20T12:00:00.000Z", "2026-10-20T12:00:00.000Z"),
    "0s ago"
  );
  assert.equal(
    formatBuildAge("2026-10-20T12:00:00.000Z", "2026-10-20T12:01:01.000Z"),
    "1m 1s ago"
  );
  assert.equal(
    formatBuildAge("2026-10-20T12:00:00.000Z", "2026-10-21T14:03:04.000Z"),
    "1d 2h ago"
  );
  assert.equal(
    formatBuildAge("2026-10-20T12:00:00.000Z", "2026-10-20T11:59:59.000Z"),
    "0s ago"
  );
});

test("Build age: Eleventy exposes one ISO timestamp for each rebuild", () => {
  const globalData = new Map();
  const events = new Map();
  configureEleventy({
    setUseGitIgnore() {},
    addPassthroughCopy() {},
    addPlugin() {},
    setLibrary() {},
    addFilter() {},
    addCollection() {},
    addGlobalData(name, value) {
      globalData.set(name, value);
    },
    on(name, callback) {
      events.set(name, callback);
    },
    setServerOptions() {}
  });

  events.get("eleventy.before")();
  assert.match(
    globalData.get("buildTimestamp")(),
    /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/
  );
});

test("Build age: footer provides an accessible live timer backed by the build timestamp", () => {
  const footer = fs.readFileSync(path.resolve("src/_includes/partials/footer.njk"), "utf-8");
  const baseLayout = fs.readFileSync(path.resolve("src/_includes/layouts/base.njk"), "utf-8");

  assert.match(
    footer,
    /<time id="build-age" data-build-timestamp="{{ buildTimestamp }}" aria-live="polite">REBUILT: INITIALIZING<\/time>/
  );
  assert.match(baseLayout, /<script type="module" src="\/assets\/js\/build-timer\.js"><\/script>/);
});