process.env.DATABASE_PATH = ':memory:';
process.env.THEMES_DIR = './themes';
process.env.FRONTEND_DIST = './frontend/dist';
process.env.UPLOAD_DIR = '/tmp/hipctf-challenges-api-test';
process.env.UPLOAD_SIZE_LIMIT = '5mb';

import * as fs from 'fs';
import * as os from 'os';
import * as path from 'path';
import { Test } from '@nestjs/testing';
import { INestApplication } from '@nestjs/common';
import { HttpAdapterHost } from '@nestjs/core';
import cookieParser from 'cookie-parser';
import * as express from 'express';
import request from 'supertest';
import { CookieAccessInfo } from 'cookiejar';
import { AppModule } from '../../backend/src/app.module';
import { GlobalExceptionFilter } from '../../backend/src/common/filters/global-exception.filter';
import { CsrfMiddleware } from '../../backend/src/common/middleware/csrf.middleware';
import { ConfigService } from '@nestjs/config';
import { initDb } from './db-helper';

describe('Admin Challenges API - guards + structured validation', () => {
  let app: INestApplication;
  let adminToken: string;
  let csrf: string;
  const uploadDir = fs.mkdtempSync(path.join(os.tmpdir(), 'hipctf-challenges-api-'));

  beforeAll(async () => {
    process.env.UPLOAD_DIR = uploadDir;
    const moduleRef = await Test.createTestingModule({ imports: [AppModule] }).compile();
    app = moduleRef.createNestApplication();
    app.use(cookieParser());
    app.use(express.json({ limit: '1mb' }));
    const csrfMw = new CsrfMiddleware(app.get(ConfigService));
    app.use((req: any, res: any, next: any) => csrfMw.use(req, res, next));
    app.useGlobalPipes(new (require('@nestjs/common').ValidationPipe)({ whitelist: true, forbidNonWhitelisted: false, transform: true }));
    const httpAdapterHost = app.get(HttpAdapterHost);
    app.useGlobalFilters(new GlobalExceptionFilter(httpAdapterHost));
    await app.init();
    await initDb(app);

    const server = app.getHttpServer();
    await request(server).post('/api/v1/auth/register-first-admin')
      .send({ username: 'admin', password: 'Sup3rSecret!Pass' })
      .expect(201);

    const csrfPrime = await request(server).get('/api/v1/auth/csrf');
    const csrfCookie = (csrfPrime.headers['set-cookie'] as unknown as string[] | undefined)?.find((c) => c.startsWith('csrf='));
    csrf = csrfCookie ? decodeURIComponent(csrfCookie.split(';')[0].split('=')[1]) : '';

    const login = await request(server).post('/api/v1/auth/login')
      .set('Cookie', `csrf=${csrf}`)
      .set('X-CSRF-Token', csrf)
      .send({ username: 'admin', password: 'Sup3rSecret!Pass' })
      .expect(201);
    adminToken = login.body.accessToken;
  });

  afterAll(async () => {
    await app.close();
    if (fs.existsSync(uploadDir)) {
      try {
        fs.rmSync(uploadDir, { recursive: true, force: true });
      } catch {
        // ignore
      }
    }
  });

  it('rejects unauthenticated GET /api/v1/admin/challenges with 401', async () => {
    await request(app.getHttpServer()).get('/api/v1/admin/challenges').expect(401);
  });

  it('rejects malformed import body with 400 and structured VALIDATION_FAILED details', async () => {
    const server = app.getHttpServer();
    const agent = request.agent(server);
    await agent.get('/api/v1/auth/csrf');
    const cookies: any = agent.jar.getCookies(CookieAccessInfo.All);
    const csrfValue = cookies.find((c: any) => c.name === 'csrf').value;
    const res = await agent
      .post('/api/v1/admin/challenges/import')
      .set('Authorization', `Bearer ${adminToken}`)
      .set('X-CSRF-Token', csrfValue)
      .send({ format: 'wrong', version: 'abc', challenges: 'not-an-array' });
    expect(res.status).toBe(400);
    expect(res.body?.code).toBe('VALIDATION_FAILED');
    expect(Array.isArray(res.body?.details)).toBe(true);
  });

  it('returns 200 with the versioned envelope on export', async () => {
    const res = await request(app.getHttpServer())
      .get('/api/v1/admin/challenges/export')
      .set('Authorization', `Bearer ${adminToken}`);
    expect(res.status).toBe(200);
    expect(res.headers['content-type']).toMatch(/application\/json/);
    expect(res.headers['content-disposition']).toMatch(/attachment.*challenges-export-/);
    expect(res.body?.format).toBe('hipctf-challenges');
    expect(res.body?.version).toBe(1);
    expect(Array.isArray(res.body?.challenges)).toBe(true);
  });
});