import 'reflect-metadata';
import { ForbiddenException } from '@nestjs/common';
import { describe, expect, it, vi } from 'vitest';

/**
 * `FileInterceptor` wird als Attrappe eingesetzt, damit die Grenzen der
 * Upload-Route (T-LRR-04) am AUFRUF pruefbar sind — Muster
 * `dashboard-images.controller.spec.ts` (quick-260921-pi9).
 */
const { fileInterceptorMock } = vi.hoisted(() => ({
  fileInterceptorMock: vi.fn(() => class FakeInterceptor {}),
}));
vi.mock('@nestjs/platform-express', () => ({ FileInterceptor: fileInterceptorMock }));

import { FAVORITE_ICON_MAX_BYTES } from './favorite-icon-files';
import { FavoritesController } from './favorites.controller';

/**
 * favorites.controller.spec — NEU (quick-260923-lrr).
 *
 * Fuenf Bereiche: Interceptor-Grenzen der Upload-Route (Feld `icon`, 512 KB,
 * genau eine Datei), die Header der Symbol-Antwort (jetzt `private` statt
 * `public`, 260923-lrr), Weitergabe von Mandant/Benutzer ausschliesslich aus
 * dem Sitzungsnachweis (`req.tenantId` VOR `req.user.tenantId`, Muster
 * `extractContext`), Abweisung ohne Mandantenkontext, und die
 * Routen-Metadaten der zwei neuen Wege.
 */
function makeService() {
  return {
    list: vi.fn(async () => []),
    create: vi.fn(async () => ({ id: 'new' })),
    reorder: vi.fn(async () => []),
    getIconBytes: vi.fn(async () => ({
      contentType: 'image/png',
      body: Buffer.from([0x89, 0x50, 0x4e, 0x47]),
    })),
    uploadIcon: vi.fn(async (_tenantId: string, id: string, _userId: string) => ({
      id,
      uploadedIconMime: 'image/png',
      iconVersion: 1,
    })),
    removeUploadedIcon: vi.fn(async (_tenantId: string, id: string, _userId: string) => ({
      id,
      uploadedIconMime: null,
      iconVersion: 2,
    })),
    update: vi.fn(async () => ({})),
    remove: vi.fn(async () => undefined),
  };
}

function makeRes() {
  const headers: Record<string, string> = {};
  return {
    headers,
    setHeader: vi.fn((name: string, value: string) => {
      headers[name] = value;
    }),
    send: vi.fn(),
  };
}

function makeReq(overrides: Partial<{ tenantId: string | null; user: any }> = {}) {
  return {
    tenantId: overrides.tenantId,
    user: overrides.user ?? { id: 'user-1', tenantId: 'tenant-from-user' },
  } as any;
}

describe('FavoritesController (quick-260923-lrr)', () => {
  it('Test 1: FileInterceptor wird mit dem Feld icon und { limits: { fileSize: 512 * 1024, files: 1 } } aufgerufen', () => {
    expect(fileInterceptorMock).toHaveBeenCalledWith('icon', {
      limits: { fileSize: FAVORITE_ICON_MAX_BYTES, files: 1 },
    });
    expect(FAVORITE_ICON_MAX_BYTES).toBe(512 * 1024);
  });

  it('Test 2: getIcon setzt Content-Type aus dem Dienst, Cache-Control private, nosniff, CSP sandbox', async () => {
    const service = makeService();
    const controller = new FavoritesController(service as never);
    const res = makeRes();

    await controller.getIcon('fav-1', makeReq({ tenantId: 'tenant-1' }), res as never);

    expect(service.getIconBytes).toHaveBeenCalledWith('tenant-1', 'fav-1', 'user-1');
    expect(res.headers['Content-Type']).toBe('image/png');
    expect(res.headers['Cache-Control']).toBe('private, max-age=86400');
    expect(res.headers['X-Content-Type-Options']).toBe('nosniff');
    expect(res.headers['Content-Security-Policy']).toBe("default-src 'none'; sandbox");
  });

  it('Test 3: uploadIcon reicht tenantId aus req.tenantId (VOR req.user.tenantId) und userId aus req.user.id an den Dienst', async () => {
    const service = makeService();
    const controller = new FavoritesController(service as never);
    const file = { buffer: Buffer.from([1]), originalname: 'x.png', mimetype: 'image/png', size: 1 };

    await controller.uploadIcon('fav-1', makeReq({ tenantId: 'tenant-1' }), file);

    expect(service.uploadIcon).toHaveBeenCalledWith('tenant-1', 'fav-1', 'user-1', file);
  });

  it('Test 4: uploadIcon faellt auf req.user.tenantId zurueck, wenn req.tenantId fehlt', async () => {
    const service = makeService();
    const controller = new FavoritesController(service as never);
    const file = { buffer: Buffer.from([1]), originalname: 'x.png', mimetype: 'image/png', size: 1 };

    await controller.uploadIcon('fav-1', makeReq({ tenantId: undefined }), file);

    expect(service.uploadIcon).toHaveBeenCalledWith('tenant-from-user', 'fav-1', 'user-1', file);
  });

  it('Test 5: removeUploadedIcon reicht tenantId/userId ebenso weiter', async () => {
    const service = makeService();
    const controller = new FavoritesController(service as never);

    await controller.removeUploadedIcon('fav-1', makeReq({ tenantId: 'tenant-1' }));

    expect(service.removeUploadedIcon).toHaveBeenCalledWith('tenant-1', 'fav-1', 'user-1');
  });

  it('Test 6: ohne Mandantenkontext -> ForbiddenException, Dienst wird NICHT aufgerufen', async () => {
    const service = makeService();
    const controller = new FavoritesController(service as never);
    const file = { buffer: Buffer.from([1]), originalname: 'x.png', mimetype: 'image/png', size: 1 };

    await expect(
      controller.uploadIcon('fav-1', makeReq({ tenantId: null, user: { id: 'user-1' } }), file),
    ).rejects.toThrow(ForbiddenException);
    expect(service.uploadIcon).not.toHaveBeenCalled();

    await expect(
      controller.removeUploadedIcon('fav-1', makeReq({ tenantId: null, user: { id: 'user-1' } })),
    ).rejects.toThrow(ForbiddenException);
    expect(service.removeUploadedIcon).not.toHaveBeenCalled();
  });

  it('Test 7: POST :id/icon und DELETE :id/icon sind als Routen-Metadaten vorhanden', () => {
    const proto = FavoritesController.prototype;
    expect(Reflect.getMetadata('path', proto.uploadIcon)).toBe(':id/icon');
    expect(Reflect.getMetadata('method', proto.uploadIcon)).toBe(1); // RequestMethod.POST
    expect(Reflect.getMetadata('path', proto.removeUploadedIcon)).toBe(':id/icon');
    expect(Reflect.getMetadata('method', proto.removeUploadedIcon)).toBe(3); // RequestMethod.DELETE
  });
});