const cloud = require('wx-server-sdk')

cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV})


exports.main = async (event, context) => {
  console.log("调用云函数openapi, 参数event：", event);
  let {name, data} = event;
  switch (event.name||event.action) {
    case "wxacode.getUnlimited":
    case "getWXACodeUnlimited":{
      return getWXACodeUnlimited(data)
    }
    case "wxacode.get":
    case 'getWXACode': {
      return getWXACode(data)
    }
    case "security.msgSecCheck":{
      try{
        console.log("检查文本安全, 参数：", data);
        var res = await cloud.openapi.security.msgSecCheck(data);
        console.log("返回结果: ", res);
        return res;
      }catch(e){
        return e;
      }
    }
    case "security.imgSecCheck":{
      try{
        console.log("检查图片安全, 参数：", data);
        if(data.media)
          var value = Buffer.from(data.media);
        else if(data.fileID){
          var {fileID} = data;
          var res = await cloud.downloadFile({fileID});
          var value = res.fileContent;
        }
        var res = await cloud.openapi.security.imgSecCheck({
          media:{
            contentType:"image/png",
            value
          }
        });
        console.log("返回结果: ", res);
        return res;
      }catch(e){
        return e;
      }
    }
    case 'getOpenData': {
      return cloud.getOpenData(data);
    }
    case "search.siteSearch":{
      return cloud.openapi.search.siteSearch(data);
    }
    default: {
      return
    }
  }
}

async function getWXACodeUnlimited(data){
  let {scene, page} = data;
  const wxacodeResult = await cloud.openapi.wxacode.getUnlimited({
    scene, page
  })
  const fileExtensionMatches = wxacodeResult.contentType.match(/\/([^\/]+)/)
  const fileExtension = (fileExtensionMatches && fileExtensionMatches[1]) || 'jpg'

  return cloud.uploadFile({
    cloudPath: `images/wxacode/${(page+"?"+scene).replace(/[\/?&]/g, "_")}.${fileExtension}`,
    fileContent: wxacodeResult.buffer,
  })
}


async function getWXACode(data) {
  let {path} = data;
  const wxacodeResult = await cloud.openapi.wxacode.get({
    path
  })

  const fileExtensionMatches = wxacodeResult.contentType.match(/\/([^\/]+)/)
  const fileExtension = (fileExtensionMatches && fileExtensionMatches[1]) || 'jpg'

  return cloud.uploadFile({
    cloudPath: `images/wxacode/${path.replace(/[\/?&]/g,"_")}.${fileExtension}`,
    fileContent: wxacodeResult.buffer,
  });
}