process.env.DATABASE_PATH = ':memory:';
process.env.THEMES_DIR = './themes';
process.env.FRONTEND_DIST = './frontend/dist';
process.env.UPLOAD_DIR = '/tmp/hipctf-challenges-events-sse-test';

import { Test } from '@nestjs/testing';
import { INestApplication, ValidationPipe } 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';
import { SseHubService } from '../../backend/src/common/services/sse-hub.service';

describe('GET /api/v1/events (authenticated SSE)', () => {
  let app: INestApplication;
  let adminToken: string;
  let hub: SseHubService;

  beforeAll(async () => {
    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 ValidationPipe({ whitelist: true, forbidNonWhitelisted: false, transform: true }));
    const httpAdapterHost = app.get(HttpAdapterHost);
    app.useGlobalFilters(new GlobalExceptionFilter(httpAdapterHost));
    await app.init();
    await initDb(app);
    hub = app.get(SseHubService);

    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='));
    const 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();
  });

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

  it('emits a status frame with state + timestamps and a solve frame when the hub emits one', (done) => {
    const server = app.getHttpServer();
    const req = request(server)
      .get('/api/v1/events')
      .set('Authorization', `Bearer ${adminToken}`)
      .set('Accept', 'text/event-stream');
    let gotStatus = false;
    let gotSolve = false;
    req
      .buffer(true)
      .parse((res, cb) => {
        const chunks: Buffer[] = [];
        res.on('data', (chunk: Buffer) => {
          chunks.push(chunk);
          const text = Buffer.concat(chunks).toString('utf8');
          if (!gotStatus) {
            // Status frame: `event: status\ndata: {...}\n\n` with snake_case keys.
            const m = text.match(/(?:event: status\n)?data: (\{[^\n]*\})\n/);
            if (m) {
              try {
                const payload = JSON.parse(m[1]);
                expect(payload).toHaveProperty('state');
                expect(payload).toHaveProperty('server_time_utc');
                expect(payload).toHaveProperty('event_start_utc');
                expect(payload).toHaveProperty('event_end_utc');
                expect(payload).toHaveProperty('seconds_to_start');
                expect(payload).toHaveProperty('seconds_to_end');
                gotStatus = true;
              } catch (e) {
                (res as any).destroy();
                done(e);
                return;
              }
            }
          }
          if (gotStatus && !gotSolve) {
            hub.emitScoreboard({
              topic: 'solve',
              challengeId: 'c1',
              playerId: 'p1',
              playerName: 'player1',
              awardedPoints: 50,
              rankBonus: 0,
              pointsAwarded: 50,
              solvedAt: new Date().toISOString(),
              awardedAtUtc: new Date().toISOString(),
              position: 1,
              livePoints: 50,
              solveCount: 1,
              initialPoints: 100,
              minimumPoints: 50,
              decaySolves: 5,
            });
            const m2 = text.match(/(?:event: solve\n)?data: (\{[^\n]*\})\n/g);
            if (m2) {
              for (const line of m2) {
                try {
                  const payload = JSON.parse(line.replace(/^data: /, '').trim());
                  if (payload.challenge_id === 'c1') {
                    expect(payload.player_id).toBe('p1');
                    expect(payload.player_name).toBe('player1');
                    expect(payload.awarded_points).toBe(50);
                    expect(payload.rank_bonus).toBe(0);
                    expect(payload.awarded_at_utc).toBeTruthy();
                    expect(payload.position).toBe(1);
                    expect(payload.live_points).toBe(50);
                    expect(payload.solve_count).toBe(1);
                    expect(payload.initial_points).toBe(100);
                    expect(payload.minimum_points).toBe(50);
                    expect(payload.decay_solves).toBe(5);
                    gotSolve = true;
                    (res as any).destroy();
                    done();
                    return;
                  }
                } catch {
                  // ignore
                }
              }
            }
          }
        });
        res.on('end', () => cb(null, Buffer.concat(chunks)));
        res.on('error', (err) => cb(err, null));
      });
    req.on('response', (res) => {
      if (res.statusCode !== 200) {
        done(new Error(`Unexpected status ${res.statusCode}`));
      }
    });
    req.on('error', (err) => done(err));
    req.end(() => {});
  }, 30_000);
});