var url = require('url')
  , http = require('http')
  , path = require('path')
  , Hash = require('traverse/hash')
  , port = 3000

try {
  var util = require('util')
} catch(e) {
  var util = require('utils')
}

function parseurl(urlstr) {
  var defaults = {
      protocol: 'http:'
    , port: 80
    , search: ''
    , pathname: ''
    , secure: false
  }
  if (urlstr.match(/^https:/)) {
    defaults.port = 443
  }
  var returl = Hash(defaults).merge(url.parse(urlstr)).end
  if (returl.protocol == 'https') {
    returl.secure = true
  }
  return returl
}

function parseparams(urlstr) {
  return url.parse(urlstr, true).query
}

if (process.argv.length > 2) {
  port = Number(process.argv[2])
}
console.log('starting on port '+port)

var server = http.createServer(function(request, response) {
  try {
    var params = parseparams(request.url)
      , requrl = parseurl(params.url)
      , proxy_client = http.createClient(requrl.port, requrl.hostname, requrl.secure)
      , proxy_request = proxy_client.request(
          'GET'
        , requrl.pathname+requrl.search
        , {'User-Agent': 'Embedly', 'Host': requrl.hostname})

    proxy_request.end()
    proxy_request.on('response', function(proxy_response) {
      try {
        response.writeHead(proxy_response.statusCode, proxy_response.headers)
        proxy_response.on('data', function(chunk) {
          try {
            response.write(chunk)
          } catch(e) {}
        })
        proxy_response.on('end', function() {
          response.end()
        })

        proxy_response.on('end', function() {
          response.end()
        })
      } catch(e) {
        response.end()
      }
    })
  } catch(e) {
    response.writeHead(500, {'Content-Length': -1})
    response.end()
  }
}).listen(port)