text: 'use strict';
  var url = require('url')
    , contrib = require('../index')
    , blessed = require('gitboard-cli-blessed');
  
  function OutputBuffer(options) {
    this.isTTY = true;
    this.columns = options.cols;
    this.rows = options.rows;
    this.write = function(s) {
      s = s.replace('\x1b8', ''); //not clear from where in blessed this code comes from. It forces the terminal to clear and loose existing content.
      options.res.write(s);
    };
  
    this.on = function() {};
  }
  
  function InputBuffer() {
    this.isTTY = true;
    this.isRaw = true;
  
    this.emit = function() {};
  
    this.setRawMode = function() {};
    this.resume = function() {};
    this.pause = function() {};
  
    this.on = function() {};
  }
  
  function serverError(req, res, err) {
    setTimeout(function() {
      if (!res.headersSent) res.writeHead(500, {'Content-Type': 'text/plain'});
      res.write('\r\n\r\n'+err+'\r\n\r\n');
      //restore cursor
      res.end('\u001b[?25h');
    }, 0);
  
    return true;
  }
  
  
  function createScreen(req, res) {
    var query = url.parse(req.url, true).query;
  
    var cols = query.cols || 250;
    var rows = query.rows || 50;
  
    if (cols<=35 || cols>=500 || rows<=5 || rows>=300) {
      serverError(req, res, 'cols must be bigger than 35 and rows must be bigger than 5');
      return null;
    }
  
    res.writeHead(200, {'Content-Type': 'text/plain'});
  
    var output = new contrib.OutputBuffer({res: res, cols: cols, rows: rows});
    var input = new contrib.InputBuffer(); //required to run under forever since it replaces stdin to non-tty
    var program = blessed.program({output: output, input: input});
  
    if (query.terminal) program.terminal = query.terminal;
    if (query.isOSX) program.isOSXTerm = query.isOSX;
    if (query.isiTerm2) program.isiTerm2 = query.isiTerm2;
  
    var screen = blessed.screen({program: program});
    return screen;
  }
  
  
  exports.createScreen = createScreen;
  exports.OutputBuffer = OutputBuffer;
  exports.InputBuffer = InputBuffer;
  exports.serverError = serverError;
  