import { readFileSync } from "node:fs";

import { describe, expect, it } from "vitest";

import en from "../content/release-notes/en.json";
import hu from "../content/release-notes/hu.json";
import { type ReleaseEntry } from "./releaseNotes";

const EN = en as ReleaseEntry[];
const HU = hu as ReleaseEntry[];

// DX-6: the app version is hand-maintained in two places that MUST agree — the repo-root VERSION file
// (the single source baked into the image + served at /api/version) and the newest release note
// (what the in-app "What's new" shows). A release that bumps one but forgets the other ships a wrong
// changelog or a mismatched banner. This locks them together so the gate catches the drift.
describe("release version consistency", () => {
  it("the newest note's version matches the VERSION file", () => {
    const version = readFileSync(new URL("../../../VERSION", import.meta.url), "utf-8").trim();
    expect(EN[0]?.version).toBe(version);
  });

  it("release notes are ordered newest-first with unique versions", () => {
    const versions = EN.map((r) => r.version);
    expect(new Set(versions).size).toBe(versions.length);
    const num = (v: string) => v.split(".").map(Number) as [number, number, number];
    for (let i = 1; i < versions.length; i++) {
      const [a, b] = [num(versions[i - 1]!), num(versions[i]!)];
      const newer = a[0] - b[0] || a[1] - b[1] || a[2] - b[2];
      expect(newer, `${versions[i - 1]} before ${versions[i]}`).toBeGreaterThan(0);
    }
  });
});

// Owner rule: internal work never ships on its own — it waits for a release a user can see. So the
// release being cut always says what changed for the user.
it("the newest release has something a user notices", () => {
  expect(EN[0]!.new.length + EN[0]!.fixed.length).toBeGreaterThan(0);
});

// A note is a sentence or two (owner's call): the old paragraphs were what made the dialog slow and
// unread. The ceiling is generous for Hungarian, whose words run longer.
it("every item is short", () => {
  const long = [...EN, ...HU].flatMap((r) =>
    [...r.new, ...r.fixed].filter((s) => s.length > 260).map((s) => `${r.version}: ${s}`),
  );
  expect(long).toEqual([]);
});

it("the Hungarian notes are the English ones, item for item", () => {
  const shape = (all: ReleaseEntry[]) =>
    all.map((r) => [r.version, r.date, r.sha ?? "", r.new.length, r.fixed.length].join(" "));
  expect(shape(HU)).toEqual(shape(EN));
});