import {createServer} from 'node:net';
import {describe, expect, it} from 'vitest';
import {
  findAvailablePort,
  resolveDevStackPorts,
} from './dev-stack-port-utils.mjs';

function reservePort(port) {
  return new Promise((resolve, reject) => {
    const server = createServer();

    server.once('error', reject);
    server.listen(port, '127.0.0.1', () => {
      server.off('error', reject);
      resolve(server);
    });
  });
}

describe('dev stack port utils', () => {
  it('使用端口可用性检查为被占用端口寻找后续可用端口', async () => {
    const firstServer = await reservePort(0);
    const firstPort = firstServer.address().port;
    const secondServer = await reservePort(firstPort + 1);

    try {
      const availablePort = await findAvailablePort({
        host: '127.0.0.1',
        preferredPort: firstPort,
      });

      expect(availablePort).toBeGreaterThan(firstPort + 1);
    } finally {
      await Promise.all([
        new Promise((resolve) => firstServer.close(resolve)),
        new Promise((resolve) => secondServer.close(resolve)),
      ]);
    }
  });

  it('为 npm run dev 的所有后续流程解析互不冲突的端口', async () => {
    const resolvedPorts = await resolveDevStackPorts({
      spacetime: {host: '127.0.0.1', preferredPort: 0},
      api: {host: '127.0.0.1', preferredPort: 0},
      web: {host: '127.0.0.1', preferredPort: 0},
      adminWeb: {host: '127.0.0.1', preferredPort: 0},
    });

    expect(new Set(Object.values(resolvedPorts)).size).toBe(4);
  });
});