/**
 * Integratietests voor de gecombineerde app-container: de Express-app serveert
 * zowel de API op /api als de gebouwde frontend op /.
 *
 * Draait zonder database: NODE_ENV=test slaat het schema-initialisatie en
 * app.listen() in server.js over, en geen van de geteste routes raakt de db.
 */
import { after, before, describe, it } from "node:test";
import assert from "node:assert/strict";
import { mkdtempSync, mkdirSync, writeFileSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";

const INDEX_MARKER = "<div id=\"root\"></div>";
const ASSET_BODY   = "console.log('vibefinance');";

let server;
let basis;

before(async () => {
  // Nagebootste Vite-build: index.html + een asset met hash in de naam.
  const staticDir = mkdtempSync(join(tmpdir(), "vibefinance-static-"));
  mkdirSync(join(staticDir, "assets"));
  writeFileSync(join(staticDir, "index.html"), `<!DOCTYPE html><html><body>${INDEX_MARKER}</body></html>`);
  writeFileSync(join(staticDir, "assets", "index-abc12345.js"), ASSET_BODY);

  process.env.NODE_ENV         = "test";
  process.env.STATIC_DIR       = staticDir;
  process.env.UPDATE_CHECK_URL = "";          // geen uitgaande call in tests
  process.env.JWT_SECRET       = "test-secret";

  const { default: app } = await import("../src/server.js");
  server = app.listen(0);
  await new Promise((res) => server.once("listening", res));
  basis = `http://127.0.0.1:${server.address().port}`;
});

after(() => server?.close());

describe("API", () => {
  it("health geeft status ok", async () => {
    const res = await fetch(`${basis}/api/health`);
    assert.equal(res.status, 200);
    const body = await res.json();
    assert.equal(body.status, "ok");
    assert.equal(typeof body.uptime, "number");
  });

  it("onbekende API-route geeft 404 als JSON, niet de SPA", async () => {
    const res = await fetch(`${basis}/api/bestaat-niet`);
    assert.equal(res.status, 404);
    assert.match(res.headers.get("content-type") ?? "", /application\/json/);
    assert.equal((await res.json()).error, "Endpoint niet gevonden.");
  });

  it("beschermde route zonder token geeft 401", async () => {
    const res = await fetch(`${basis}/api/data`);
    assert.equal(res.status, 401);
    assert.equal((await res.json()).error, "Niet ingelogd.");
  });

  it("update-check zonder ingestelde URL meldt niets", async () => {
    const res  = await fetch(`${basis}/api/update-check`);
    const body = await res.json();
    assert.equal(res.status, 200);
    assert.equal(body.latest, null);
    assert.equal(body.disabled, true);
  });
});

describe("Frontend serveren", () => {
  it("root geeft index.html", async () => {
    const res = await fetch(`${basis}/`);
    assert.equal(res.status, 200);
    assert.match(res.headers.get("content-type") ?? "", /text\/html/);
    assert.match(await res.text(), new RegExp(INDEX_MARKER));
  });

  it("onbekend pad valt terug op index.html (React-routing)", async () => {
    const res = await fetch(`${basis}/voortgang`);
    assert.equal(res.status, 200);
    assert.match(await res.text(), new RegExp(INDEX_MARKER));
  });

  it("index.html wordt niet gecached", async () => {
    const res = await fetch(`${basis}/`);
    assert.match(res.headers.get("cache-control") ?? "", /no-store/);
  });

  it("assets met hash worden lang gecached", async () => {
    const res = await fetch(`${basis}/assets/index-abc12345.js`);
    assert.equal(res.status, 200);
    assert.equal(await res.text(), ASSET_BODY);
    assert.match(res.headers.get("cache-control") ?? "", /immutable/);
  });
});

describe("Security headers", () => {
  it("CSP staat Google Fonts en inline styles toe", async () => {
    const res = await fetch(`${basis}/`);
    const csp = res.headers.get("content-security-policy") ?? "";
    assert.match(csp, /style-src [^;]*'unsafe-inline'/);
    assert.match(csp, /fonts\.googleapis\.com/);
    assert.match(csp, /font-src [^;]*fonts\.gstatic\.com/);
    assert.doesNotMatch(csp, /upgrade-insecure-requests/);
  });

  it("statische bestanden krijgen geen rate-limit headers", async () => {
    const res = await fetch(`${basis}/assets/index-abc12345.js`);
    assert.equal(res.headers.get("ratelimit-limit"), null);
  });

  it("de API krijgt wel rate-limit headers", async () => {
    const res = await fetch(`${basis}/api/health`);
    assert.notEqual(res.headers.get("ratelimit-limit"), null);
  });
});