// 使用OpenStreetMap和Leaflet替代百度地图

export function loadMap() {

  return new Promise(function(resolve, reject) {
    // eslint-disable-next-line no-undef
    if (typeof L !== 'undefined') {
      // eslint-disable-next-line no-undef
      resolve(L);
      return true;
    }

    // 加载Leaflet CSS
    if (!document.querySelector('link[href*="leaflet.css"]')) {
      const link = document.createElement('link');
      link.rel = 'stylesheet';
      link.href = 'https://unpkg.com/leaflet@1.9.4/dist/leaflet.css';
      link.integrity = 'sha256-p4NxAoJBhIIN+hmNHrzRCf9tD/miZyoHS5obTRR9BMY=';
      link.crossOrigin = '';
      document.head.appendChild(link);
    }

    // 加载Leaflet JS
    const script = document.createElement('script');
    script.type = 'text/javascript';
    script.src = 'https://unpkg.com/leaflet@1.9.4/dist/leaflet.js';
    script.integrity = 'sha256-20nQCchB9co0qIjJZRGuk2/Z9VM+kNiyxNV1lvTlZBo=';
    script.crossOrigin = '';
    script.onload = function() {
      // eslint-disable-next-line no-undef
      resolve(L);
    };
    script.onerror = reject;
    document.head.appendChild(script);
  });

}

// export function loadBMap() {
//     return new Promise(function(resolve, reject) {
//         if (typeof BMap !== 'undefined') {
//             resolve(BMap)
//             return true
//         }
//         window.onBMapCallback = function() {
//             resolve(BMap)
//         }
//         // 使用https协议需要添加一下meta标签
//         var protocolStr = document.location.protocol;
//         if(protocolStr == "https:")
//         {
//             let meta = document.createElement('meta')
//             meta.httpEquiv = 'Content-Security-Policy'
//             meta.content ='upgrade-insecure-requests'
//             meta.onerror = reject
//             document.head.appendChild(meta)
//         }
//         // 引入百度地图
//         let script = document.createElement('script')
//         script.type = 'text/javascript'
//         script.src =
//             'http://api.map.baidu.com/api?v=2.0&ak='+ process.env.VUE_APP_BAI_DU_AK +'&s=1&__ec_v__=20190126&callback=onBMapCallback'
//         script.onerror = reject
//         document.head.appendChild(script)
//     })
// }