import test from 'node:test';
import assert from 'node:assert/strict';
import { mkdtempSync, mkdirSync, writeFileSync, readFileSync, existsSync, readdirSync, statSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { createJobs } from '../src/jobs.js';
import { validateJob } from '../src/validate.js';

function setup({ files, dockerImpl }) {
  const root = mkdtempSync(join(tmpdir(), 'idx-'));
  const config = { giteaUrl: 'https://git.x', giteaToken: 'tok_SECRET_123456', previewsRoot: join(root, 'previews'), workRoot: join(root, 'work'), cacheRoot: join(root, 'cache'), minFreeBytes: 1000, buildTimeoutMs: 900000 };
  const git = async ({ dir }) => { for (const [f, c] of Object.entries(files)) { mkdirSync(join(dir, f, '..'), { recursive: true }); writeFileSync(join(dir, f), c); } mkdirSync(join(dir, '.git'), { recursive: true }); writeFileSync(join(dir, '.git', 'config'), 'x'); };
  const docker = { run: async (args) => (dockerImpl ? dockerImpl(args) : { code: 0 }) };
  const jobs = createJobs({ config, docker, git, mem: () => 1e10, fs: { chownR: async () => {} }, setTimer: () => {} });
  return { config, jobs, out: join(config.previewsRoot, 'demo') };
}
const job = (o = {}) => ({ sub: 'demo', repo: 'own/rep', sha: 'abcdef1', branch: 'main', mode: 'auto', env: {}, ...o });
const wait = async (jobs, id) => { for (let i = 0; i < 400; i++) { const r = jobs.get(id); if (r.state === 'done' || r.state === 'failed') return r; await new Promise((r2) => setTimeout(r2, 5)); } throw new Error('timeout'); };
const workOf = (args) => args.find((a) => a.endsWith(':/work')).split(':')[0];

test('Doener-Fall: nur Doener_Nation_Website.html ⇒ index.html ist Byte-Kopie, Original bleibt', async () => {
  const html = Buffer.from('<!doctype html><title>Döner</title>äö\n');
  const s = setup({ files: { 'Doener_Nation_Website.html': html, '.webklar-preview.json': '{}' } });
  const r = await wait(s.jobs, s.jobs.submit(job()));
  assert.equal(r.state, 'done');
  assert.deepEqual(readFileSync(join(s.out, 'index.html')), html);
  assert.deepEqual(readFileSync(join(s.out, 'Doener_Nation_Website.html')), html);
  assert.equal(statSync(join(s.out, 'index.html')).mode & 0o777, 0o644);
});

test('vorhandene index.html bleibt unberührt', async () => {
  const s = setup({ files: { 'index.html': 'ORIG', 'home.html': 'HOME' } });
  await wait(s.jobs, s.jobs.submit(job()));
  assert.equal(readFileSync(join(s.out, 'index.html'), 'utf8'), 'ORIG');
});

test('bevorzugter Name gewinnt, sonst größte Datei', async () => {
  let s = setup({ files: { 'a.html': 'aaaa', 'Main.html': 'm', 'zz.html': 'zzzzzzzz' } });
  await wait(s.jobs, s.jobs.submit(job()));
  assert.equal(readFileSync(join(s.out, 'index.html'), 'utf8'), 'm');
  s = setup({ files: { 'a.html': 'aaaa', 'b.htm': 'bbbbbbbbb', 'c.html': 'c' } });
  await wait(s.jobs, s.jobs.submit(job()));
  assert.equal(readFileSync(join(s.out, 'index.html'), 'utf8'), 'bbbbbbbbb');
});

test('index-Unterordner wird Webroot; fehlender Ordner ⇒ Repo-Wurzel', async () => {
  let s = setup({ files: { 'public/index.html': 'PUB', 'x.html': 'root' } });
  let r = await wait(s.jobs, s.jobs.submit(job({ index: 'public' })));
  assert.equal(r.state, 'done');
  assert.deepEqual(readdirSync(s.out), ['index.html']);
  s = setup({ files: { 'x.html': 'root' } });
  await wait(s.jobs, s.jobs.submit(job({ index: 'gibtsnicht' })));
  assert.equal(readFileSync(join(s.out, 'index.html'), 'utf8'), 'root');
});

test('kein HTML ⇒ Platzhalter mit Anzeigename (maskiert)', async () => {
  const s = setup({ files: { 'readme.txt': 'x' } });
  await wait(s.jobs, s.jobs.submit(job({ displayName: 'A & <B>' })));
  const h = readFileSync(join(s.out, 'index.html'), 'utf8');
  assert.match(h, /<h1>A &amp; &lt;B&gt;<\/h1>/);
  assert.match(h, /<title>A &amp; &lt;B&gt; – wird vorbereitet<\/title>/);
  const s2 = setup({ files: { 'readme.txt': 'x' } });
  await wait(s2.jobs, s2.jobs.submit(job()));
  assert.match(readFileSync(join(s2.out, 'index.html'), 'utf8'), /<h1>demo<\/h1>/);
});

test('Build ohne index.html im Ausgabeordner ⇒ Quellstand statisch + Kandidat/Platzhalter', async () => {
  const s = setup({
    files: { 'package.json': JSON.stringify({ scripts: { build: 'x' } }), 'seite.html': 'SEITE' },
    dockerImpl: (args) => { if (args.includes('build')) { mkdirSync(join(workOf(args), 'dist'), { recursive: true }); writeFileSync(join(workOf(args), 'dist', 'app.js'), 'x'); mkdirSync(join(workOf(args), 'node_modules'), { recursive: true }); writeFileSync(join(workOf(args), 'node_modules', 'm.js'), 'x'); } return { code: 0 }; },
  });
  const r = await wait(s.jobs, s.jobs.submit(job()));
  assert.equal(r.state, 'done'); assert.equal(r.result, 'static');
  assert.equal(readFileSync(join(s.out, 'index.html'), 'utf8'), 'SEITE');
  assert.ok(!existsSync(join(s.out, 'node_modules')));
  const s2 = setup({
    files: { 'package.json': JSON.stringify({ scripts: { build: 'x' } }) },
    dockerImpl: (args) => { if (args.includes('build')) mkdirSync(join(workOf(args), 'dist'), { recursive: true }); return { code: 0 }; },
  });
  await wait(s2.jobs, s2.jobs.submit(job({ displayName: 'Shop' })));
  assert.match(readFileSync(join(s2.out, 'index.html'), 'utf8'), /<h1>Shop<\/h1>/);
});

test('Build-Ausgabe mit index.html wird unverändert veröffentlicht', async () => {
  const s = setup({
    files: { 'package.json': JSON.stringify({ scripts: { build: 'x' } }) },
    dockerImpl: (args) => { if (args.includes('build')) { mkdirSync(join(workOf(args), 'dist'), { recursive: true }); writeFileSync(join(workOf(args), 'dist', 'index.html'), 'B'); writeFileSync(join(workOf(args), 'dist', 'o.html'), 'O'); } return { code: 0 }; },
  });
  const r = await wait(s.jobs, s.jobs.submit(job()));
  assert.equal(r.result, 'build');
  assert.deepEqual(readdirSync(s.out).sort(), ['index.html', 'o.html']);
});

test('fehlgeschlagener Build bleibt ein Fehler (alter Stand bleibt)', async () => {
  const s = setup({ files: { 'package.json': JSON.stringify({ scripts: { build: 'x' } }) }, dockerImpl: (args) => ({ code: args.includes('build') ? 1 : 0 }) });
  const r = await wait(s.jobs, s.jobs.submit(job()));
  assert.equal(r.state, 'failed');
});

test('validateJob: displayName optional, ≤100 Zeichen, keine Steuerzeichen', () => {
  const good = { sub: 'a', repo: 'o/r', sha: 'abcdef1', branch: 'main' };
  assert.equal(validateJob({ ...good, displayName: 'Döner Nation' }).job.displayName, 'Döner Nation');
  assert.equal('displayName' in validateJob(good).job, false);
  assert.equal(validateJob({ ...good, displayName: 'x'.repeat(101) }).ok, false);
  assert.equal(validateJob({ ...good, displayName: 'a\nb' }).ok, false);
  assert.equal(validateJob({ ...good, displayName: 5 }).ok, false);
});