var	knox = require('knox')
var uuid = require('uuid/v1')

var s3

var acceptableuploadTypes = {
	'image/gif': 'gif',
	'image/jpeg': 'jpg',
	'image/jpg': 'jpg',
	'image/png': 'png',
}

module.exports = {}

module.exports.init = function (){
  s3 = knox.createClient({
    key: process.env.S3_KEY,
    secret: process.env.S3_SECRET,
    bucket: process.env.S3_BUCKET,
  })
}

module.exports.client = function(){
  return s3
}

module.exports.put = function (opt) {
	var filename
	var err
	var now = new Date()

	var file = opt.file

  var types = opt.types
	var extension = types && types[file.mimetype]

	if (opt.filename) {
	  filename = opt.filename
	} else if (opt.preserveFilename) {
	  filename = file.originalname
	} else {
    filename = uuid() + "." + extension;
	}

	var remote_path = opt.dirname + filename

	if (types && ! extension) {
		err = "Unacceptable filetype."
	}
	else if (opt.maxSize && file.size > opt.maxSize) {
		err = "File too large. Uploads can be a maximum of " + opt.maxSize + " bytes."
	}

	if (err) {
		console.error(">>>", err)
		opt.unacceptable && opt.unacceptable(err)
		return
	}

	opt.acceptable && opt.acceptable(err)

	console.log("upload >", remote_path)
	s3.putBuffer(file.buffer, remote_path, {
		'Content-Length': file.size,
		'Content-Type': file.mimetype,
		'x-amz-acl': 'public-read'
	}, function(err, s3res) {
		if (err || s3res.statusCode !== 200) {
			console.error(err);
			if (s3res && s3res.resume) {
				s3res.resume()
			}
			return;
		}

		var file_url = s3res.url || s3res.req.url

		opt.success && opt.success(file_url)
	}).on('error', function(err, s3res){
		console.error(err)
		s3res && s3res.resume && s3res.resume()
	})
}