var config = require('../../config.json'),
	util = require('./util'),
	knox = require('knox'),
	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 = (+now)
					 + (opt.username ? "-" + opt.username : "")
					 + "-"
				   + file.originalname.replace(/\..*$/,"")
							.replace(/[^0-9a-zA-Z]+/g,"-")
							.substr(-128)
				   + "." + extension;

	var remote_path = "/vvalls/images/" + key + "/" + ts + "/" + 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.putFile(file.path, remote_path, {
		'Content-Length': file.size,
		'Content-Type': file.mimetype,
		'x-amz-acl': 'public-read'
	}, function(err, s3res) {
		if (err || s3res.statusCode !== 200) {
			console.log(s3res.statusCode)
			console.error('s3 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()
	})
}