var OS = require('../device/OS');

var isBooted = false;

var DOMContentLoaded = function (callback)
{
    if (isBooted)
    {
        return;
    }

    if (document.readyState === 'complete' || document.readyState === 'interactive')
    {
        isBooted = true;
        
        callback();

        return;
    }

    var check = function ()
    {
        isBooted = true;

        document.removeEventListener('deviceready', check, true);
        document.removeEventListener('DOMContentLoaded', check, true);
        window.removeEventListener('load', check, true);

        callback();
    };

    if (!document.body)
    {
        window.setTimeout(check, 20);
    }
    else if (OS.cordova && !OS.cocoonJS)
    {
        //  Ref. http://docs.phonegap.com/en/3.5.0/cordova_events_events.md.html#deviceready
        document.addEventListener('deviceready', check, false);
    }
    else
    {
        document.addEventListener('DOMContentLoaded', check, true);
        window.addEventListener('load', check, true);
    }
};

module.exports = DOMContentLoaded;