// @vitest-environment node

import { SignJWT } from 'jose';
import { NextRequest } from 'next/server';
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import { middleware } from './middleware';

/**
 * middleware.test — Desktop-Client-Cookie (260917-h2s), eigener describe-Block
 * neben den bestehenden Redirect-/Session-Faellen. `@vitest-environment node`,
 * weil `NextRequest`/`NextResponse` node-typische APIs (Headers, URL) nutzen,
 * die im jsdom-Standardmilieu der Suite nicht gebraucht werden.
 */
describe('middleware — Desktop-Client-Cookie (260917-h2s)', () => {
  beforeEach(() => {
    vi.stubEnv('JWT_SECRET', 'test-secret');
  });

  afterEach(() => {
    vi.unstubAllEnvs();
  });

  it('Test 1: /login?desktop=1 setzt das Cookie tessera_desktop=1', async () => {
    const req = new NextRequest('http://localhost:3000/login?desktop=1');
    const res = await middleware(req);
    const setCookie = res.headers.get('set-cookie');
    expect(setCookie).toContain('tessera_desktop=1');
    expect(setCookie).toContain('Path=/');
    expect(setCookie).toContain('Max-Age=31536000');
    expect(setCookie).toContain('SameSite=lax');
    expect(setCookie).not.toContain('Secure');
    expect(setCookie).not.toContain('HttpOnly');
  });

  it('Test 2: /login ohne Parameter setzt kein Cookie', async () => {
    const req = new NextRequest('http://localhost:3000/login');
    const res = await middleware(req);
    expect(res.headers.get('set-cookie')).toBeNull();
  });

  it('Test 3: /dashboard?desktop=1 ohne Session leitet um und setzt das Cookie', async () => {
    const req = new NextRequest('http://localhost:3000/dashboard?desktop=1');
    const res = await middleware(req);
    expect(res.status).toBe(307);
    expect(res.headers.get('location')).toContain('/login');
    expect(res.headers.get('set-cookie')).toContain('tessera_desktop=1');
  });

  it('Test 4: https setzt Secure', async () => {
    const req = new NextRequest('https://tessera.example.com/login?desktop=1');
    const res = await middleware(req);
    expect(res.headers.get('set-cookie')).toContain('Secure');
  });

  it('Test 5: gueltiges JWT laesst die Anfrage durch und setzt trotzdem das Cookie', async () => {
    const token = await new SignJWT({ sub: 'u1' })
      .setProtectedHeader({ alg: 'HS256' })
      .setIssuedAt()
      .setExpirationTime('5m')
      .sign(new TextEncoder().encode('test-secret'));

    const req = new NextRequest('http://localhost:3000/dashboard?desktop=1', {
      headers: { cookie: `session=${token}` },
    });
    const res = await middleware(req);
    expect(res.headers.get('set-cookie')).toContain('tessera_desktop=1');
    expect(res.headers.get('x-middleware-next')).toBe('1');
  });

  it('Test 6 (quick-260918-gza): /login mit dv/dc/dos setzt zusaetzlich tessera_desktop_client', async () => {
    const req = new NextRequest(
      'http://localhost:3000/login?desktop=1&dv=1.2.0&dc=a6d1a64&dos=windows',
    );
    const res = await middleware(req);
    expect(res.cookies.get('tessera_desktop')?.value).toBe('1');
    expect(res.cookies.get('tessera_desktop_client')?.value).toBe('1.2.0|a6d1a64|windows');

    const setCookie = res.headers.get('set-cookie');
    expect(setCookie).toContain('tessera_desktop_client=1.2.0%7Ca6d1a64%7Cwindows');
    expect(setCookie).toContain('Max-Age=31536000');
    expect(setCookie).toContain('Path=/');
    // Kein HttpOnly fuer DIESES Cookie -- der bestehende tessera_desktop
    // liefert ebenfalls kein HttpOnly, darum genuegt die Wertpruefung oben.
  });

  it('Test 7 (quick-260918-gza, alter Client): /login?desktop=1 ohne dv/dc/dos setzt kein tessera_desktop_client', async () => {
    const req = new NextRequest('http://localhost:3000/login?desktop=1');
    const res = await middleware(req);
    expect(res.cookies.get('tessera_desktop')?.value).toBe('1');
    expect(res.cookies.get('tessera_desktop_client')).toBeUndefined();
  });

  it('Test 8 (quick-260918-gza, Bereinigung): ungueltige oder fehlende Werte setzen kein tessera_desktop_client', async () => {
    const angleBrackets = new NextRequest(
      'http://localhost:3000/login?desktop=1&dv=1.2.0%3Cscript%3E&dc=a6d1a64&dos=windows',
    );
    expect((await middleware(angleBrackets)).cookies.get('tessera_desktop_client')).toBeUndefined();

    const spaceInOs = new NextRequest(
      'http://localhost:3000/login?desktop=1&dv=1.2.0&dc=a6d1a64&dos=win%20dows',
    );
    expect((await middleware(spaceInOs)).cookies.get('tessera_desktop_client')).toBeUndefined();

    const missingDv = new NextRequest(
      'http://localhost:3000/login?desktop=1&dc=a6d1a64&dos=windows',
    );
    expect((await middleware(missingDv)).cookies.get('tessera_desktop_client')).toBeUndefined();

    const emptyCommit = new NextRequest(
      'http://localhost:3000/login?desktop=1&dv=1.2.0&dc=&dos=linux',
    );
    expect((await middleware(emptyCommit)).cookies.get('tessera_desktop_client')?.value).toBe(
      '1.2.0||linux',
    );
  });

  it('Test 9 (quick-260918-gza, Redirect-Pfad): /dashboard ohne Session setzt beide Cookies auf dem 307', async () => {
    const req = new NextRequest(
      'http://localhost:3000/dashboard?desktop=1&dv=1.2.0&dc=a6d1a64&dos=linux',
    );
    const res = await middleware(req);
    expect(res.status).toBe(307);
    expect(res.headers.get('location')).toContain('/login');
    expect(res.cookies.get('tessera_desktop')?.value).toBe('1');
    expect(res.cookies.get('tessera_desktop_client')?.value).toBe('1.2.0|a6d1a64|linux');
  });
});

describe('middleware — /login bei bestehender Anmeldung (quick-260930)', () => {
  beforeEach(() => {
    vi.stubEnv('JWT_SECRET', 'test-secret');
  });

  afterEach(() => {
    vi.unstubAllEnvs();
  });

  async function token(claims: Record<string, unknown> = {}) {
    return new SignJWT({ sub: 'u1', ...claims })
      .setProtectedHeader({ alg: 'HS256' })
      .setIssuedAt()
      .setExpirationTime('5m')
      .sign(new TextEncoder().encode('test-secret'));
  }

  function loginReq(url: string, session?: string) {
    return new NextRequest(url, session ? { headers: { cookie: `session=${session}` } } : {});
  }

  it('angemeldet: /login leitet aufs Dashboard um', async () => {
    const res = await middleware(loginReq('http://localhost:3000/login', await token()));
    expect(res.status).toBe(307);
    expect(new URL(res.headers.get('location') as string).pathname).toBe('/');
  });

  it('angemeldet mit sicherem next: dorthin', async () => {
    const res = await middleware(
      loginReq('http://localhost:3000/login?next=%2Fadmin%2Fusers', await token()),
    );
    expect(new URL(res.headers.get('location') as string).pathname).toBe('/admin/users');
  });

  it('angemeldet mit fremdem oder zirkulaerem next: Dashboard', async () => {
    for (const next of ['https%3A%2F%2Fboese.example', '%2F%2Fboese.example', '%2Flogin']) {
      const res = await middleware(
        loginReq(`http://localhost:3000/login?next=${next}`, await token()),
      );
      const loc = new URL(res.headers.get('location') as string);
      expect(loc.host).toBe('localhost:3000');
      expect(loc.pathname).toBe('/');
    }
  });

  it('ohne oder mit ungueltigem Cookie: Anmeldeseite wie bisher', async () => {
    const ohne = await middleware(loginReq('http://localhost:3000/login'));
    expect(ohne.headers.get('x-middleware-next')).toBe('1');
    const kaputt = await middleware(
      loginReq('http://localhost:3000/login', 'kein.gueltiges.token'),
    );
    expect(kaputt.headers.get('x-middleware-next')).toBe('1');
  });

  it('Kennwortwechsel ausstehend: keine Umleitung von /login', async () => {
    const res = await middleware(
      loginReq('http://localhost:3000/login', await token({ mustChangePassword: true })),
    );
    expect(res.headers.get('x-middleware-next')).toBe('1');
  });
});