process.env.DATABASE_PATH = ':memory:';
process.env.THEMES_DIR = './themes';
process.env.FRONTEND_DIST = './frontend/dist';

import { Test } from '@nestjs/testing';
import { INestApplication } from '@nestjs/common';
import { HttpAdapterHost } from '@nestjs/core';
import request from 'supertest';
import { AppModule } from '../../backend/src/app.module';
import { GlobalExceptionFilter } from '../../backend/src/common/filters/global-exception.filter';

describe('SSE flattened payloads', () => {
  let app: INestApplication;

  beforeAll(async () => {
    const moduleRef = await Test.createTestingModule({ imports: [AppModule] }).compile();
    app = moduleRef.createNestApplication();
    const httpAdapterHost = app.get(HttpAdapterHost);
    app.useGlobalFilters(new GlobalExceptionFilter(httpAdapterHost));
    await app.init();
  });

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

  it('event/stream emits a flattened { status, countdownMs, serverNowUtc, startUtc, endUtc } payload', (done) => {
    const server = app.getHttpServer();
    const req = request(server).get('/api/v1/event/stream');
    let received = false;
    req
      .buffer(true)
      .parse((res, cb) => {
        const chunks: Buffer[] = [];
        res.on('data', (chunk: Buffer) => {
          chunks.push(chunk);
          if (received) return;
          const text = Buffer.concat(chunks).toString('utf8');
          const match = /data: ({.*?})\n/.exec(text);
          if (match) {
            try {
              const payload = JSON.parse(match[1]);
              expect(payload).toHaveProperty('status');
              expect(payload).toHaveProperty('countdownMs');
              expect(payload).toHaveProperty('serverNowUtc');
              expect(payload).toHaveProperty('startUtc');
              expect(payload).toHaveProperty('endUtc');
              expect(['Stopped', 'Running']).toContain(payload.status);
              received = true;
              (res as any).destroy();
              done();
            } catch (e) {
              done(e);
            }
          }
        });
        res.on('end', () => cb(null, Buffer.concat(chunks)));
        res.on('error', (err) => cb(err, null));
      })
      .end(() => {});
  }, 10_000);
});