'use strict';
/**
 * Integrasjonstester: booter serveren på tilfeldig port med en midlertidig
 * datakatalog og tester REST-API + WebSocket-broadcast ende-til-ende.
 * Kjør med: npm test
 */

const { test, before, after } = require('node:test');
const assert = require('node:assert');
const fs = require('fs');
const os = require('os');
const path = require('path');
const WebSocket = require('ws');
const { createServer } = require('../server');

let server, baseUrl, dataDir;

function req(method, p, body = null, headers = {}) {
  return fetch(baseUrl + p, {
    method,
    headers: { 'Content-Type': 'application/json', 'X-Remote-User': 'testuser', ...headers },
    body: body !== null ? JSON.stringify(body) : undefined,
  });
}

before(async () => {
  dataDir = fs.mkdtempSync(path.join(os.tmpdir(), 'netops-test-'));
  ({ server } = createServer({ dataDir }));
  await new Promise(resolve => server.listen(0, '127.0.0.1', resolve));
  baseUrl = `http://127.0.0.1:${server.address().port}`;
});

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

test('state starter tomt og identifiserer bruker fra header', async () => {
  const res = await req('GET', '/api/state');
  assert.equal(res.status, 200);
  const data = await res.json();
  assert.equal(data.user, 'testuser');
  assert.deepEqual(data.tasks, []);
});

test('seed fyller tom database, og nekter når data finnes', async () => {
  let res = await req('POST', '/api/seed');
  assert.equal(res.status, 200);
  const { count } = await res.json();
  assert.equal(count, 16);

  res = await req('POST', '/api/seed');
  assert.equal(res.status, 409);
});

test('create normaliserer og setter audit-felter', async () => {
  const res = await req('POST', '/api/tasks', {
    title: 'Test BGP-peer', category: 'BGP', priority: 'P1',
    status: 'ugyldig-status', estHours: 5000, tags: ['x', '', 'y'],
    deadline: 'ikke-en-dato', desc: 'hei\x00der',
  });
  assert.equal(res.status, 201);
  const { task } = await res.json();
  assert.equal(task.status, 'todo');        // ugyldig → default
  assert.equal(task.estHours, 999);          // klampet
  assert.deepEqual(task.tags, ['x', 'y']);   // tomme fjernet
  assert.equal(task.deadline, '');           // ugyldig format
  assert.equal(task.desc, 'heider');         // kontrolltegn fjernet
  assert.equal(task.createdBy, 'testuser');
  assert.equal(task.v, 1);
});

test('create uten tittel feiler', async () => {
  const res = await req('POST', '/api/tasks', { desc: 'mangler tittel' });
  assert.equal(res.status, 400);
});

test('update med riktig versjon ok, feil versjon gir 409 med serverens task', async () => {
  let res = await req('POST', '/api/tasks', { title: 'Versjonstest' });
  const { task } = await res.json();

  res = await req('PUT', `/api/tasks/${task.id}`, { ...task, status: 'progress', v: task.v });
  assert.equal(res.status, 200);
  const { task: t2 } = await res.json();
  assert.equal(t2.status, 'progress');
  assert.equal(t2.v, 2);

  // Lagring fra utdatert versjon skal avvises
  res = await req('PUT', `/api/tasks/${task.id}`, { ...task, status: 'blocked', v: 1 });
  assert.equal(res.status, 409);
  const conflict = await res.json();
  assert.equal(conflict.task.v, 2);
  assert.equal(conflict.task.status, 'progress');
});

test('done setter completed, gjenåpning nullstiller', async () => {
  let res = await req('POST', '/api/tasks', { title: 'Ferdigtest' });
  let { task } = await res.json();

  res = await req('PUT', `/api/tasks/${task.id}`, { v: task.v, status: 'done' });
  ({ task } = await res.json());
  assert.equal(task.completed, new Date().toISOString().slice(0, 10));
  assert.equal(task.completedBy, 'testuser');
  // Delvis update skal beholde øvrige felter
  assert.equal(task.title, 'Ferdigtest');

  res = await req('PUT', `/api/tasks/${task.id}`, { v: task.v, status: 'todo' });
  ({ task } = await res.json());
  assert.equal(task.completed, null);
});

test('kommentarer: legg til, slett egne, nekt andres', async () => {
  let res = await req('POST', '/api/tasks', { title: 'Kommentartest' });
  const { task } = await res.json();

  res = await req('POST', `/api/tasks/${task.id}/comments`, { text: 'Første kommentar' });
  assert.equal(res.status, 201);
  const { comment } = await res.json();
  assert.equal(comment.by, 'testuser');

  // Annen bruker får ikke slette
  res = await req('DELETE', `/api/tasks/${task.id}/comments/${comment.id}`, null, { 'X-Remote-User': 'kari' });
  assert.equal(res.status, 400);

  res = await req('DELETE', `/api/tasks/${task.id}/comments/${comment.id}`);
  assert.equal(res.status, 200);
  const { task: after } = await res.json();
  assert.equal(after.comments.length, 0);
});

test('delete fjerner oppgave, 404 ved ukjent id', async () => {
  let res = await req('POST', '/api/tasks', { title: 'Slettetest' });
  const { task } = await res.json();
  res = await req('DELETE', `/api/tasks/${task.id}`);
  assert.equal(res.status, 200);
  res = await req('DELETE', `/api/tasks/${task.id}`);
  assert.equal(res.status, 404);
});

test('aktivitetslogg føres', async () => {
  const res = await req('GET', '/api/state');
  const { activity } = await res.json();
  assert.ok(activity.length > 0);
  assert.ok(activity.some(a => a.action === 'create'));
  assert.ok(activity.some(a => a.action === 'done'));
  assert.ok(activity.some(a => a.action === 'comment'));
});

test('websocket: mottar sync ved tilkobling og broadcast ved endringer', async () => {
  const wsUrl = baseUrl.replace('http', 'ws') + '/ws';
  const wsClient = new WebSocket(wsUrl, { headers: { 'X-Remote-User': 'kari' } });
  const messages = [];
  wsClient.on('message', raw => messages.push(JSON.parse(raw)));
  await new Promise((resolve, reject) => {
    wsClient.on('open', resolve);
    wsClient.on('error', reject);
  });

  // Vent på hello + sync
  await new Promise(r => setTimeout(r, 200));
  const hello = messages.find(m => m.type === 'hello');
  assert.equal(hello.user, 'kari');
  assert.ok(messages.some(m => m.type === 'sync' && Array.isArray(m.tasks)));

  // En REST-endring fra annen bruker skal pushes til kari
  const res = await req('POST', '/api/tasks', { title: 'WS-broadcast-test' });
  const { task } = await res.json();
  await new Promise(r => setTimeout(r, 200));
  const broadcastMsg = messages.find(m => m.type === 'task' && m.op === 'create' && m.task.id === task.id);
  assert.ok(broadcastMsg, 'broadcast ikke mottatt');
  assert.equal(broadcastMsg.by, 'testuser');
  assert.equal(broadcastMsg.activity.action, 'create');

  wsClient.close();
});

test('replace erstatter alt og persisterer til disk', async () => {
  const res = await req('POST', '/api/replace', [
    { title: 'Eneste oppgave', category: 'NMS', priority: 'P4' },
    { ugyldig: 'uten tittel' },
  ]);
  const { count } = await res.json();
  assert.equal(count, 1);

  // Vent på at skrivekøen tømmes, og verifiser fila på disk
  await new Promise(r => setTimeout(r, 300));
  const onDisk = JSON.parse(fs.readFileSync(path.join(dataDir, 'tasks.json'), 'utf8'));
  assert.equal(onDisk.length, 1);
  assert.equal(onDisk[0].title, 'Eneste oppgave');
});

test('cookie-auth: login setter cookie, ugyldig navn avvises', async () => {
  let res = await fetch(baseUrl + '/api/login', {
    method: 'POST', headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ name: 'jon.v' }),
  });
  assert.equal(res.status, 200);
  assert.match(res.headers.get('set-cookie'), /netops_user=jon\.v/);

  // Brukeren identifiseres via cookien
  res = await fetch(baseUrl + '/api/state', { headers: { Cookie: 'netops_user=jon.v' } });
  assert.equal((await res.json()).user, 'jon.v');

  res = await fetch(baseUrl + '/api/login', {
    method: 'POST', headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ name: '<script>' }),
  });
  assert.equal(res.status, 400);
});