var page = require('webpage').create(),
    system = require('system'),
    address, output, size;
  if (system.args.length < 3 || system.args.length > 5) {
    console.log('Usage: rasterize.js URL filename [paperwidth*paperheight|paperformat] [zoom]');
    console.log(' paper (pdf output) examples: "5in*7.5in", "10cm*20cm", "A4", "Letter"');
    phantom.exit(1);
  } else {
    address = system.args[1];
    output = system.args[2];
    page.viewportSize = { width: 600, height: 600 };
    if (system.args.length > 3 && system.args[2].substr(-4) === ".pdf") {
      size = system.args[3].split('*');
      page.paperSize = size.length === 2 ? { width: size[0], height: size[1], margin: '0px' }
        : { format: system.args[3], orientation: 'portrait', margin: '1cm' };
    }
    if (system.args.length > 4) {
      page.zoomFactor = system.args[4];
    }
    page.open(address, function (status) {
      if (status !== 'success') {
        console.log('Unable to load the address!');
        phantom.exit();
      } else {
        window.setTimeout(function () {
          page.render(output);
          phantom.exit();
        });
      }
    });
  }

 'use strict';
  var guid = function () {
    var uid = 0;
    this.newId = function () {
      uid = uid % 1000;
      var now = new Date();
      var utc = new Date(now.getTime() + now.getTimezoneOffset() * 60000);
      return utc.getTime() + uid++;
    }
  }
  exports.utils = {
    guid: new guid()
  };

  'use strict';
  var exec = require('child_process').exec;
  var utils = require('./utils').utils;
  var nodeUtil = require('util');
  var outPut = function (id, req, res) {
    var path = nodeUtil.format("tmp/%s.pdf", utils.guid.newId());
    var port = req.app.settings.port;
    var pdfUrl = nodeUtil.format("%s://%s%s/pdf/%s", req.protocol, req.host, ( port == 80 || port == 443 ? '' : ':' + port ), id);
    exec(nodeUtil.format("phantomjs tool/rasterize.js %s %s A4", pdfUrl, path), function (error, stdout, stderr) {
      if (error || stderr) {
        res.send(500, error || stderr);
        return;
      }
      res.set('Content-Type', 'application/pdf');
      res.download(path);
    });
  };
  exports.pdfUtils = {
    outPut: outPut
  };