async function testSpeed(url: string, timeout = 1500) {
  const start = performance.now();

  try {
    await Promise.race([
      fetch(url, { method: 'HEAD', mode: 'no-cors' }),
      new Promise((_, reject) => setTimeout(() => reject('timeout'), timeout)),
    ]);

    return performance.now() - start;
  } catch {
    return Infinity; // unreachable or timed out
  }
}

async function selectBestMap() {
  const testTargets = {
    // amap: 'https://www.amap.com/favicon.ico',
    baidu: 'https://map.baidu.com/favicon.ico',
    google: 'https://maps.google.com/favicon.ico',
  };

  const results: Record<string, number> = {};

  for (const key in testTargets) {
    results[key] = await testSpeed(testTargets[key]);
  }

  logger.debug(results);

  // 根据延迟排序，选择最稳最快的平台
  return Object.entries(results).sort((a, b) => a[1] - b[1])[0][0];
}

export async function getAutoMappedService(): Promise<string> {
  const target = {
    // amap: 'https://surl.amap.com/2dYNorIJ1dgoN',
    baidu: 'https://j.map.baidu.com/f9/c3x',
    google: 'https://maps.app.goo.gl/9LqvMwEq7VaRkqnM6',
  };

  const fastestMap = await selectBestMap();

  return target[fastestMap];
}