import assert from 'node:assert/strict';
import { spawn } from 'node:child_process';
import { createServer } from 'node:http';
import test from 'node:test';

test('one worker tick requests every configured data set exactly once', async () => {
  const requests = [];
  const server = createServer((request, response) => {
    let body = '';
    request.setEncoding('utf8');
    request.on('data', (chunk) => { body += chunk; });
    request.on('end', () => {
      requests.push({ url: request.url, body: JSON.parse(body) });
      response.writeHead(200, { 'Content-Type': 'application/json' });
      response.end(JSON.stringify({ success: true, data: { processed: 0, failures: 0, hasMore: false } }));
    });
  });
  await new Promise((resolve) => server.listen(0, '127.0.0.1', resolve));
  const address = server.address();
  assert(address && typeof address === 'object');

  const datasets = ['learning-records', 'appointments', 'lessons'];
  const child = spawn(process.execPath, ['scripts/run-legacy-sync-worker.mjs', '--once'], {
    cwd: process.cwd(),
    env: {
      ...process.env,
      XIAOSHU_FUNCTION_URL: `http://127.0.0.1:${address.port}`,
      XIAOSHU_SYNC_OPERATOR_TOKEN: 'test-session',
      XIAOSHU_SYNC_DATASETS: datasets.join(','),
      XIAOSHU_SYNC_HEALTH_PORT: '0',
    },
    stdio: ['ignore', 'pipe', 'pipe'],
  });
  let stderr = '';
  child.stderr.on('data', (chunk) => { stderr += chunk; });
  const exitCode = await new Promise((resolve) => child.on('close', resolve));
  await new Promise((resolve) => server.close(resolve));

  assert.equal(exitCode, 0, stderr);
  assert.deepEqual(requests.map((entry) => entry.url), datasets.map(() => '/xiaoshu/ops/gateway-v3'));
  assert.deepEqual(requests.map((entry) => entry.body.params.dataset).sort(), datasets.slice().sort());
  assert(requests.every((entry) => entry.body.params.operation === 'ops/sync/run'));
  assert(requests.every((entry) => entry.body.token === 'test-session'));
});