/**
 * Delete an image from the S3 Bucket
 *
 * @author Daveyon Mayne <@MirMayne>
 * @date July 14th 2019
 */
 
const AWS = require('aws-sdk');

const deletePhoto = async (avatar_url) => {
  
  if (!avatar_url) {
    return console.log('No avatar_url found to delete 😢');
  }

  const { AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, S3_BUCKET, S3_REGION } = process.env;
  
  AWS.config.setPromisesDependency(require('bluebird'));
  AWS.config.update({ accessKeyId: AWS_ACCESS_KEY_ID, secretAccessKey: AWS_SECRET_ACCESS_KEY, region: S3_REGION });

  // Create an s3 instance
  const s3 = new AWS.S3();

  // On around Line 41, you'll see how we stored the "Key"
  // see: https://gist.github.com/SylarRuby/b60eea29c1682519e422476cc5357b60
  const splitOn = `https://${S3_BUCKET.toLowerCase()}.s3.${S3_REGION.toLowerCase()}.amazonaws.com/`;
  const Key = avatar_url.split(splitOn)[1]; // The `${userId}.${type}`
  
  const params = {
    Bucket: S3_BUCKET,
    Key, // required
  };
  
  // More on the deleteObject property:
  // see: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3.html#deleteObject-property
  const data  = await s3.deleteObject(params).promise();
  console.log(data); // => {} Empty object when successful
}

module.exports = deletePhoto;