/**
 * Autoloader.
 *
 * The autoloader is responsible for defining namespaces and dynamically loading javascript 
 * files that are not yet included. The intention is to provide a similar functionality as 
 * include, import etc. Contrary to it's name the autoloader is not able to truely autoload 
 * referenced classes.
 *
 * @copyright  Dennis Eichhorn
 * @license    OMS License 1.0
 * @version    1.0.0
 * @since      1.0.0
 */
(function (jsOMS)
{
    "use strict";

    jsOMS.Autoloader             = {};
    jsOMS.Autoloader.loaded      = [];
    jsOMS.Autoloader.namespaced  = [];
    jsOMS.Autoloader.assetLoader = new jsOMS.Asset.AssetManager();

    /**
     * Define namespace
     *
     * @param {string} namespace Namespace
     *
     * @since 1.0.0
     */
    jsOMS.Autoloader.defineNamespace = function (namespace)
    {
        if (jsOMS.Autoloader.namespaced.indexOf(namespace) === -1) {
            let paths = namespace.split('.');
            paths.splice(0, 1);

            const length  = paths.length;
            let current = jsOMS;

            for (let i = 0; i < length; i++) {
                if (typeof current[paths[i]] === 'undefined') {
                    current[paths[i]] = {};
                }

                current = current[paths[i]];
            }

            jsOMS.Autoloader.namespaced.push(namespace);
        }
    };

    /**
     * Collect all loaded javascript files
     *
     * @since 1.0.0
     */
    jsOMS.Autoloader.initPreloaded = function ()
    {
        const scripts = document.getElementsByTagName('script'),
            length  = !scripts ? 0 : scripts.length;

        for (let i = 0; i < length; i++) {
            /** global: URL */
            /** @var {string} URL */
            scripts[i].src.replace(URL + '/', '');

            if (jsOMS.Autoloader.loaded.indexOf(scripts[i].src) === -1) {
                jsOMS.Autoloader.loaded.push(scripts[i].src);
            }
        }
    };

    /**
     * Add loaded script
     *
     * @param {string} file Script URI
     *
     * @since 1.0.0
     */
    jsOMS.Autoloader.addPreloaded = function (file)
    {
        if (jsOMS.Autoloader.loaded.indexOf(file) === -1) {
            jsOMS.Autoloader.loaded.push(file);
        }
    };

    /**
     * Include script
     *
     * @param {string} file Script URI
     * @param {function} callback Callback after script loading
     *
     * @since 1.0.0
     */
    jsOMS.Autoloader.include = function (file, callback)
    {
        const length = file.length;

        for (let i = 0; i < length; i++) {
            if (jsOMS.Autoloader.loaded.indexOf(file) === -1) {
                this.assetLoader.load(file, 'js');

                jsOMS.Autoloader.loaded.push(file);
            }
        }
    };
}(window.jsOMS = window.jsOMS || {}));