module.exports = function(app, options) {
  var path = require('path');
  var ForeverAgent = require('forever-agent');
  var HttpProxy = require('http-proxy');
  var httpServer = options.httpServer;

  var config = require('../../config/environment')().APP;
  var proxy = HttpProxy.createProxyServer({
    ws: true,
    xfwd: true,
    agent: new ForeverAgent({})
  });

  console.log('Proxying to', config.endpoint);

  var apiPath = '/v1';
  app.use(apiPath, function(req, res, next) {
    // include root path in proxied request
    req.url = path.join(apiPath, req.url);

    req.headers['user-agent'] = 'Rancher UI';
    delete req.headers['cookie'];

    console.log('API Proxy', req.method, 'to', req.url);
    proxy.web(req, res, {target: config.endpoint});
  });

  var githubPath = '/github';
  app.use(githubPath, function(req, res, next) {
    // include root path in proxied request
    req.url = path.join(githubPath, req.url);

    delete req.headers['cookie'];

    console.log('Github Proxy', req.method, 'to', req.url);
    proxy.web(req, res, {target: config.endpoint});
  });

  var genericProxyPath = '/proxy';
  app.use(genericProxyPath, function(req, res, next) {
    // include root path in proxied request
    req.url = path.join(genericProxyPath, req.url);

    delete req.headers['cookie'];

    // @TODO remove this... --v
    var tmp = req.headers['x-api-headers-restrict'];
    delete req.headers['x-api-headers-restrict'];
    req.headers['X-API-Headers-Restrict'] = tmp;

    tmp = req.headers['authorization'];
    delete req.headers['authorization'];
    req.headers['Authorization'] = tmp;

    tmp = req.headers['x-api-auth-header'];
    delete req.headers['x-api-auth-header'];
    req.headers['X-API-AUTH-HEADER'] = tmp;

    tmp = req.headers['content-type'];
    delete req.headers['content-type'];
    req.headers['Content-Type'] = tmp;
    // @TODO remove this... --^

    console.log('Generic Proxy', req.method, 'to', req.url);
    proxy.web(req, res, {target: config.endpoint});
  });

  proxy.on('error', function onProxyError(err, req, res) {
    console.log('Proxy Error: on', req.method,'to', req.url,':', err);
    var error = {
      type: 'error',
      status: 500,
      code: 'ProxyError',
      message: 'Error connecting to proxy',
      detail: err.toString()
    }

    if ( req.upgrade )
    {
      res.end();
    }
    else
    {
      res.writeHead(500, {'Content-Type': 'application/json'});
      res.end(JSON.stringify(error));
    }
  });

  httpServer.on('upgrade', function proxyWsRequest(req, socket, head) {
    proxy.ws(req, socket, head, {target: config.endpoint});
  });
};