const Router = (function () {
    "use strict";

    /**
     * @routes
     * get or set routes
     */
    var routes = [];

    /**
     * @addRoute
     * add new Route logic
     */
    function addRoute(route, handler) {
        routes.push({parts: route.split('/'), handler: handler});
    }
    /**
     * @load
     * load router content from hash url
     */
    function load(route) {
        window.location.hash = route;
    }

    /**
     * @init
     * routing the content with hash location params
     */
    function init() {
        const path = window.location.hash.substr(1),
             parts = path.split('/'),
             partsLength = parts.length;

        for (let i = 0; i < routes.length; i++) {
            const route = routes[i];
            if (route.parts.length === partsLength) {
                var params = [];
                for (var j = 0; j < partsLength; j++) {
                    if (route.parts[j].substr(0, 1) === ':') {
                        params.push(parts[j]);
                    } else if (route.parts[j] !== parts[j]) {
                        break;
                    }
                }
                if (j === partsLength) {
                    route.handler.apply(undefined, params);
                    return;
                }
            }
        }
    }

    window.onhashchange = init;

    return {
        addRoute,
        load,
        init
    };
}());

export default Router;