import assert from 'node:assert/strict';
import fs from 'node:fs/promises';
import os from 'node:os';
import path from 'node:path';
import { after, before, test } from 'node:test';
import { createApp } from '../server/app.js';
import { createProjectStore } from '../server/projects.js';

let server;
let baseUrl;
let cookie;
let dataDir;

const fakeMedia = { duration: 42, width: 1080, height: 1920, rotation: 0, fps: 30, hasAudio: true };

before(async () => {
  dataDir = await fs.mkdtemp(path.join(os.tmpdir(), 'fdc-test-'));
  const probe = async (file) => {
    const content = await fs.readFile(file, 'utf8');
    if (content.startsWith('kaputt')) throw new Error('Keine Videospur gefunden.');
    return fakeMedia;
  };
  const store = createProjectStore({ dataDir, probe });
  const app = createApp({ config: { pin: '4711' }, secret: 'geheim', store });
  server = app.listen(0);
  await new Promise((resolve) => server.once('listening', resolve));
  baseUrl = `http://127.0.0.1:${server.address().port}`;

  const res = await fetch(`${baseUrl}/api/login`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ pin: '4711' }),
  });
  cookie = res.headers.get('set-cookie').split(';')[0];
});

after(async () => {
  server.close();
  await fs.rm(dataDir, { recursive: true, force: true });
});

function call(method, url, body, headers = {}) {
  const isJson = body !== undefined && typeof body === 'object' && !(body instanceof Uint8Array);
  return fetch(`${baseUrl}/api/${url}`, {
    method,
    headers: { cookie, ...(isJson ? { 'Content-Type': 'application/json' } : {}), ...headers },
    body: isJson ? JSON.stringify(body) : body,
  });
}

const upload = (id, index, offset, text) =>
  call('PUT', `projects/${id}/clips/${index}?offset=${offset}`, new TextEncoder().encode(text), {
    'Content-Type': 'application/octet-stream',
  });

const clip = (file, size) => ({
  file,
  size,
  timestamp: '2026-09-21T10:15:30',
  sender: 'Anna',
  caption: 'Ordnung',
});

async function createProject(clips) {
  const res = await call('POST', 'projects', { range: { from: '2026-09-21', to: '2026-09-25' }, clips });
  assert.equal(res.status, 201);
  return res.json();
}

test('Projekt anlegen und abrufen', async () => {
  const project = await createProject([clip('a.mp4', 10), clip('b.mov', 20)]);
  assert.equal(project.clips.length, 2);
  assert.equal(project.clips[0].status, 'pending');
  assert.equal(project.clips[0].received, 0);

  const res = await call('GET', `projects/${project.id}`);
  assert.equal((await res.json()).clips[1].file, 'b.mov');

  const list = await (await call('GET', 'projects')).json();
  assert.ok(list.some((entry) => entry.id === project.id && entry.clipCount === 2));
});

test('Ungültige Clips werden abgelehnt', async () => {
  for (const clips of [[], [clip('notiz.txt', 10)], [clip('a.mp4', 0)], [{ ...clip('a.mp4', 5), timestamp: 'gestern' }]]) {
    const res = await call('POST', 'projects', { clips });
    assert.equal(res.status, 400);
  }
});

test('Upload in Stücken, Wiederaufnahme und Abschluss mit ffprobe', async () => {
  const project = await createProject([clip('a.mp4', 10)]);

  let res = await upload(project.id, 0, 0, 'abcd');
  assert.deepEqual(await res.json(), { received: 4, status: 'pending' });

  // Falscher Offset: der Server nennt den richtigen Stand
  res = await upload(project.id, 0, 0, 'abcd');
  assert.equal(res.status, 409);
  assert.equal((await res.json()).received, 4);

  res = await upload(project.id, 0, 4, 'efghij');
  assert.deepEqual(await res.json(), { received: 10, status: 'ready' });

  const stored = await (await call('GET', `projects/${project.id}`)).json();
  assert.equal(stored.clips[0].status, 'ready');
  assert.deepEqual(stored.clips[0].media, fakeMedia);

  const file = await call('GET', `projects/${project.id}/clips/0/file`);
  assert.equal(await file.text(), 'abcdefghij');
});

test('Mehr Daten als angekündigt werden abgewiesen, der gültige Anfang bleibt', async () => {
  const project = await createProject([clip('a.mp4', 5)]);
  await upload(project.id, 0, 0, 'ab');
  const res = await upload(project.id, 0, 2, 'cdefgh');
  assert.equal(res.status, 413);
  const stored = await (await call('GET', `projects/${project.id}`)).json();
  assert.equal(stored.clips[0].received, 2);
});

test('Datei ohne Videospur wird als Fehler markiert', async () => {
  const project = await createProject([clip('a.mp4', 6)]);
  const res = await upload(project.id, 0, 0, 'kaputt');
  assert.equal((await res.json()).status, 'error');
  const stored = await (await call('GET', `projects/${project.id}`)).json();
  assert.equal(stored.clips[0].error, 'Keine Videospur gefunden.');
});

test('Unbekannte Projekte und Clips ergeben 404, auch bei manipulierten IDs', async () => {
  assert.equal((await call('GET', 'projects/00000000-0000-0000-0000-000000000000')).status, 404);
  assert.equal((await call('GET', 'projects/..%2F..%2Fetc')).status, 404);
  const project = await createProject([clip('a.mp4', 5)]);
  assert.equal((await upload(project.id, 7, 0, 'x')).status, 404);
  assert.equal((await call('GET', `projects/${project.id}/clips/0/file`)).status, 404);
});

test('Projekt löschen entfernt die Dateien', async () => {
  const project = await createProject([clip('a.mp4', 5)]);
  await upload(project.id, 0, 0, 'ab');
  assert.equal((await call('DELETE', `projects/${project.id}`)).status, 204);
  assert.equal((await call('GET', `projects/${project.id}`)).status, 404);
  await assert.rejects(fs.stat(path.join(dataDir, 'projects', project.id)));
});