import { randomBytes } from 'node:crypto';

import Fastify, { type FastifyInstance } from 'fastify';
import FormData from 'form-data';
import { afterAll, afterEach, beforeAll, beforeEach, describe, expect, it } from 'vitest';

import { buildApp } from '../src/app.js';
import type { OidcConfig } from '../src/config.js';
import { makeConfig, makeTempDir, removeDir, startStubIdp, type StubIdp } from './helpers.js';

const MIB = 1024 * 1024;

interface HookCall {
  event: string;
  body: Record<string, unknown>;
}

interface Receiver {
  url: string;
  calls: HookCall[];
  close: () => Promise<void>;
}

async function startReceiver(): Promise<Receiver> {
  const calls: HookCall[] = [];
  const app = Fastify({ logger: false });
  app.post('/hook', (request, reply) => {
    const body = request.body as Record<string, unknown>;
    calls.push({ event: String(body.event), body });
    return reply.status(204).send();
  });
  await app.listen({ port: 0, host: '127.0.0.1' });
  const address = app.server.address();
  if (address === null || typeof address === 'string') {
    await app.close();
    throw new Error('adresse du récepteur inattendue');
  }
  return {
    url: `http://127.0.0.1:${String(address.port)}/hook`,
    calls,
    close: () => app.close(),
  };
}

function oidcOverride(ref: StubIdp): OidcConfig {
  return {
    issuer: ref.issuer,
    clientId: ref.clientId,
    clientSecret: ref.clientSecret,
    scopes: ['openid', 'profile', 'email'],
  };
}

function sessionCookie(res: Response): string {
  return (res.headers.get('set-cookie') ?? '').split(';')[0] ?? '';
}

let idp: StubIdp;
let receiver: Receiver;
let app: FastifyInstance;
let baseUrl: string;
let dir: string;
let cookie: string;

async function loginViaHttp(): Promise<string> {
  const start = await fetch(`${baseUrl}/auth/login`, { redirect: 'manual' });
  const txn = sessionCookie(start);
  const authUrl = new URL(start.headers.get('location') ?? '');
  idp.setNextIdToken({ nonce: authUrl.searchParams.get('nonce') ?? '' });
  const state = authUrl.searchParams.get('state') ?? '';
  const cb = await fetch(`${baseUrl}/auth/callback?code=x&state=${encodeURIComponent(state)}`, {
    redirect: 'manual',
    headers: { cookie: txn },
  });
  return sessionCookie(cb);
}

beforeAll(async () => {
  idp = await startStubIdp();
});

afterAll(async () => {
  await idp.close();
});

beforeEach(async () => {
  receiver = await startReceiver();
  dir = await makeTempDir();
  app = await buildApp(
    makeConfig({
      targets: [{ name: 'videos', label: 'Vidéos', dir, allowDirectories: true }],
      maxFileSizeBytes: 8 * MIB,
      allowedMimeTypes: ['video/*', 'image/png'],
      oidc: oidcOverride(idp),
      webhooks: [{ url: receiver.url, events: ['upload', 'error'], headers: {}, timeoutMs: 2000 }],
    }),
    { logger: false },
  );
  await app.listen({ port: 0, host: '127.0.0.1' });
  const address = app.server.address();
  if (address === null || typeof address === 'string') throw new Error('adresse inattendue');
  baseUrl = `http://127.0.0.1:${String(address.port)}`;
  cookie = await loginViaHttp();
});

afterEach(async () => {
  await app.close(); // vide les livraisons webhook en attente (onClose -> notifier.close)
  await receiver.close();
  await removeDir(dir);
});

describe('webhooks — intégration', () => {
  it('notifie `upload` après un dépôt direct', async () => {
    const form = new FormData();
    form.append('file', randomBytes(2048), { filename: 'clip.mp4', contentType: 'video/mp4' });
    const res = await fetch(`${baseUrl}/upload?target=videos`, {
      method: 'POST',
      headers: { ...form.getHeaders(), cookie },
      body: form.getBuffer(),
    });
    expect(res.status).toBe(201);

    await app.close();
    const uploads = receiver.calls.filter((c) => c.event === 'upload');
    expect(uploads).toHaveLength(1);
    expect(uploads[0]!.body).toMatchObject({
      event: 'upload',
      target: 'videos',
      originalName: 'clip.mp4',
      mimeType: 'video/mp4',
      via: 'direct',
      user: 'user-123',
    });
  });

  it('notifie `error` quand un dépôt échoue (type refusé)', async () => {
    const form = new FormData();
    form.append('file', Buffer.from('PK'), {
      filename: 'x.zip',
      contentType: 'application/zip',
    });
    const res = await fetch(`${baseUrl}/upload?target=videos`, {
      method: 'POST',
      headers: { ...form.getHeaders(), cookie },
      body: form.getBuffer(),
    });
    expect(res.status).toBe(400);

    await app.close();
    const errors = receiver.calls.filter((c) => c.event === 'error');
    expect(errors).toHaveLength(1);
    expect(errors[0]!.body).toMatchObject({
      event: 'error',
      statusCode: 400,
      method: 'POST',
      path: '/upload',
      target: 'videos',
    });
  });

  it('notifie `upload` (via: chunked) après finalisation fragmentée', async () => {
    const data = randomBytes(200 * 1024);
    const init = await fetch(`${baseUrl}/upload/init`, {
      method: 'POST',
      headers: { 'content-type': 'application/json', cookie },
      body: JSON.stringify({
        target: 'videos',
        path: 'a/clip.mp4',
        name: 'clip.mp4',
        size: data.length,
        type: 'video/mp4',
        chunkSize: MIB,
      }),
    });
    const { id } = (await init.json()) as { id: string };
    await fetch(`${baseUrl}/upload/${id}/0`, {
      method: 'PUT',
      headers: { 'content-type': 'application/octet-stream', cookie },
      body: new Uint8Array(data),
    });
    const done = await fetch(`${baseUrl}/upload/${id}/complete`, {
      method: 'POST',
      headers: { cookie },
    });
    expect(done.status).toBe(201);

    await app.close();
    const uploads = receiver.calls.filter((c) => c.event === 'upload');
    expect(uploads).toHaveLength(1);
    expect(uploads[0]!.body).toMatchObject({
      event: 'upload',
      target: 'videos',
      storedName: 'a/clip.mp4',
      originalName: 'clip.mp4',
      via: 'chunked',
    });
  });

  it('ne notifie rien si aucun webhook n’est configuré', async () => {
    const quiet = await buildApp(
      makeConfig({
        targets: [{ name: 'videos', label: 'Vidéos', dir, allowDirectories: true }],
        allowedMimeTypes: ['video/*'],
        oidc: oidcOverride(idp),
        webhooks: [],
      }),
      { logger: false },
    );
    await quiet.listen({ port: 0, host: '127.0.0.1' });
    const quietAddress = quiet.server.address();
    if (quietAddress === null || typeof quietAddress === 'string') throw new Error('adresse');
    const quietUrl = `http://127.0.0.1:${String(quietAddress.port)}`;

    const before = receiver.calls.length;
    const res = await fetch(`${quietUrl}/upload?target=videos`, { method: 'POST', body: 'x' });
    expect(res.status).toBe(401);
    await quiet.close();
    expect(receiver.calls.length).toBe(before);
  });
});