var skipper = require('skipper');
var skipperS3 = require('skipper-s3')

// Hack to prevent this god-forsaken module from crashing our shit
var d = require('domain').create()
d.on('error', function (err) {
  console.log(err)
  console.error('Stupid error in S3 upload. Upload probably prematurely canceled')
})

function OKS3(options) {
  if (!(this instanceof OKS3)) return new OKS3(options);
  options = options || {};
  if (!options.express)
    throw new Error('Express not provided to OKS3');
  if (!options.s3)
    throw new Error('S3 configuration not provided to OKS3');
  
  if (!options.s3.image) options.s3.image = {}
  if (!options.s3.audio) options.s3.audio = {}
  if (!options.s3.video) options.s3.video = {}

/*
  // TODO: maxBytes property doesn't work - if you upload a large file,
  // it will just hang until you reload the browser, and then CRASH.
  
  // Make sure maxbytes property is there - it can be a number,
  // or zero/undefined (for no maximum upload size)
  if (options.s3.maxbytes) {
    if (! ('maxbytes' in options.s3.image))
      options.s3.image.maxbytes = options.s3.maxbytes
    if (! ('maxbytes' in options.s3.video))
      options.s3.video.maxbytes = options.s3.maxbytes
    if (! ('maxbytes' in options.s3.audio))
      options.s3.audio.maxbytes = options.s3.maxbytes
  }
*/
  if (options.s3.image.preserveFilename)
    options.s3.image.preserveFilename = preserveFilename
  if (options.s3.video.preserveFilename)
    options.s3.video.preserveFilename = preserveFilename
  if (options.s3.audio.preserveFilename)
    options.s3.audio.preserveFilename = preserveFilename

  var express = options.express;

  var router = express.Router();

  router.use(skipper());

  // req should have a method `file` on it which is
  // provided by skipper. Use that to do AWS stuff
  router.post('/image', function(req, res) {
    d.run(function () {
      var skip = req.file('image').upload({
        adapter: skipperS3,
        key: options.s3.key,
        secret: options.s3.secret,
        bucket: options.s3.bucket,
        dirname: options.s3.dirname,
        // maxBytes: options.s3.image.maxbytes,
        saveAs: options.s3.image.preserveFilename,
        headers: {
          'x-amz-acl': 'public-read'
        }
      }, function (err, uploadedFiles) {
        if (err) return res.status(500).send(err)
        res.json(uploadedFiles);
      });
   });
  });

  router.post('/audio', function(req, res) {
    d.run(function () {
      if (! options.s3.allowAudioUploads) {
        return res.status(500).json({ error: "audio uploading not permitted" })
      }
      req.file('audio').upload({
        adapter: skipperS3,
        key: options.s3.key,
        secret: options.s3.secret,
        bucket: options.s3.bucket,
        dirname: options.s3.dirname,
        // maxBytes: options.s3.audio.maxbytes,
        saveAs: options.s3.audio.preserveFilename,
        headers: {
          'x-amz-acl': 'public-read'
        }
      }, function (err, uploadedFiles) {
        if (err) res.status(500).send(err)
        res.json(uploadedFiles);
      });
    });
  });

  router.post('/video', function(req, res) {
    d.run(function () {
      if (! options.s3.allowVideoUploads) {
        return res.status(500).json({ error: "video uploading not permitted" })
      }
      req.file('video').upload({
        adapter: skipperS3,
        key: options.s3.key,
        secret: options.s3.secret,
        bucket: options.s3.bucket,
        dirname: options.s3.dirname,
        // maxBytes: options.s3.video.maxbytes,
        saveAs: options.s3.video.preserveFilename,
        headers: {
          'x-amz-acl': 'public-read'
        }
      }, function (err, uploadedFiles) {
        if (err) res.status(500).send(err)
        res.json(uploadedFiles);
      });
    });
  });
  
  function preserveFilename (stream, cb){
    cb(null, stream.filename)
  }

  this._middleware = router;
}

OKS3.prototype.middleware = function() {
  return this._middleware;
};

module.exports = OKS3