(function () {
    "use strict";
    // this will hopefully not be needed forever, but it is to iron out a bug in AngularJs related bad cached urls if the user manually changes state
    // as well as handling sites that support ui-routing and sites that don't
    angular.module('laz.videoLibrary')
        .provider('urlStateManager', ['$provide', function($provide) {

            var usesUiRouter = true;

            $provide.decorator("$browser", ["$delegate",  function($delegate) {
                // Disable AngularJs Url Change Detection if not using client-side routing
                var originalOnUrlChange = $delegate.onUrlChange;
                var originalUrl = $delegate.url;
                $delegate.onUrlChange = function(){
                    if(usesUiRouter){
                        return originalOnUrlChange.apply($delegate, arguments);
                    }
                };
                $delegate.url = function() {
                    if(usesUiRouter){
                        return originalUrl.apply($delegate, arguments);
                    }
                    return "";
                };
                return $delegate;
            }]);

            function urlStateManagerFactory($location, $window, $injector, $document){

                var ON_POP = 'popstate';

                return {
                    push: pushState,
                    replace: replaceState,
                    onPop: onPopState
                };

                function pushState(params, transitionTo){
                    if(usesUiRouter){
                        var $state = $injector.get('$state');
                        $state && $state.go(transitionTo ? transitionTo : '.', params);
                    } else {
                        $window.history.pushState(params, $document[0].title, transitionTo);
                    }
                }

                function replaceState(params, transitionTo){
                    if(usesUiRouter){
                        var $state = $injector.get('$state');
                        $state && $state.go(transitionTo ? transitionTo : '.', params, { location: 'replace' });
                    } else {
                        $window.history.replaceState(params, $document[0].title, transitionTo);
                    }
                }

                function onPopState(callback){
                    if(typeof callback === 'function'){
                        var popStateCallback = function(e){
                            if(usesUiRouter){
                                var $stateParams = $injector.get('$stateParams');
                                callback($stateParams || {});
                            } else {
                                callback(e.state || {});
                            }
                        };
                        $window.addEventListener(ON_POP, popStateCallback);
                        return function() { $window.removeEventListener(ON_POP, popStateCallback); };
                    }
                    return function(){};
                }
            }

            function useUiRouter(shouldUseUiRouter){
                usesUiRouter = !!shouldUseUiRouter;
            }

            return {
                useUiRouter: useUiRouter,
                $get: ['$location', '$window', '$injector', '$document', urlStateManagerFactory ]
            };
        }]);
})();