import config from '../config'
import sharp from 'sharp'
import S3 from 'aws-sdk/clients/s3'

class ImageCop {
  constructor(key) {
    this.key = key
    this.config = config
    this.sharp
    this.s3 = this.initializeS3()
  }

  /**
   * Initialize the s3 client.
   */
  initializeS3() {
    return new S3({
      params: { Bucket: this.config.bucket },
      apiVersion: '2006-03-01',
      region: this.config.region,
      credentials: {
        accessKeyId: this.config.credentials.key,
        secretAccessKey: this.config.credentials.secret
      }
    })
  }

  compress() {
    this.s3.getObject(
      {
        Bucket: 'image-cop',
        Key: decodeURI(this.key)
      },
      (err, data) => {
        // Handle any error and exit
        if (err) {
          console.log('Image Cop', err)
          return err
        }

        const image = sharp(data.Body)

        image
          .metadata()

          .then(metadata => {
            /**
             * Sharp uses different methods with
             * different parameters depending
             * on mimetype.
             */

            // JPEG
            if (metadata.format == 'jpeg') {
              image.jpeg(this.config.imageSettings.jpeg)
            }

            if (metadata.format == 'png') {
              image.png(this.config.imageSettings.png)
            }
            // fix issue where image was rotating.
            image.rotate()

            // enforce max width of any image in library.
            if (metadata.width > this.config.maxWidth) {
              image.resize(this.config.maxWidth)
            }
            return image.toBuffer()
          })

          .then(data => {
            /**
             * Move the compressed image to the output folder.
             */
            this.s3
              .putObject({
                Bucket: this.config.bucket,
                Key:
                  this.config.outputFolder +
                  this.key.replace(this.config.targetFolder, ''),
                Body: new Buffer(data, 'binary'),
                ACL: 'public-read'
              })
              .promise()
              .then(function(data) {
                console.log(data)
              })
              .catch(function(err) {
                console.log('Image Cop', err)
              })
          })

          .catch(err => {
            console.log('Image Cop', err)
          })
      }
    )
  }
}

export default ImageCop