var crypto = require('crypto')
var knox = require('knox')
var moment = require('moment')

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

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

module.exports.put = function (key, file, opt) {
	var fileSize, fileType, filename
	var err
	var now = new Date()

	var ts = moment().format('YYYYMMDD')

	var extension = acceptableuploadTypes[file.mimetype]
	filename = crypto.createHash('md5').update(file.buffer).digest('hex') + "." + extension;

	var remote_path = process.env.S3_DIR + filename

	if (! extension) {
		err = "Unacceptable filetype"
	}
	else if (file.size < 10) {
		err = "File too small"
	}
	else if (file.size > 2097152) { // 2mb limit
		err = "File too large. Uploads can be a maximum of 2 mb."
	}

	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(s3res.statusCode, 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("error", err)
		s3res && s3res.resume && s3res.resume()
	})
}