const computeSignature = (accessKeySecret, canonicalString) => {
    return crypto.enc.Base64.stringify(crypto.HmacSHA1(canonicalString, accessKeySecret));
}

export async function uploadOssByPath(filePath) {
  return new Promise(async (resolve, reject) => {
	  const date = new Date();
	      date.setMinutes(date.getMinutes() + 1);
	      const policyText = {
	          expiration: date.toISOString(), // 设置policy过期时间。
	          conditions: [
	              // 限制上传大小。
	              ["content-length-range", 0, 1024 * 1024 * 1024],
	          ],
	      };
	  let sts = uni.getStorageSync('sts');
	  let stsExpired = uni.getStorageSync('stsExpiredAt');
	  if(!sts || (stsExpired && dayjs().isBefore(dayjs(stsExpired)))){
	  	const {data: {data: {credentials}}} = await request.get(`${SERVER_API_URL}/oss/getSTSToken`)
	  	uni.setStorageSync('sts', credentials)
		uni.setStorageSync('stsExpiredAt', credentials.expiration)
		sts = credentials
	  }
	  console.log(sts)
	  const [filename, ext] = filePath.split('.')
	  const key = `headers/${md5(filename + (Math.random() * 100000))}.${ext}`
	  const policy = Base64.encode(JSON.stringify(policyText))
	  const signature = computeSignature(sts.accessKeySecret, policy)
	  uni.uploadFile({
		  url: 'https://oss.wsdns.cn',
		  name: 'file',
		  filePath,
		  formData: {
			  key,
			  policy,
			  OSSAccessKeyId: sts.accessKeyId,
			  signature,
			  'x-oss-security-token': sts.securityToken
		  },
		  success: () => {
			  resolve(`https://oss.wsdns.cn/${key}`)
		  },
		  error: (err) => reject(err)
	  })
  })
}