(function(){

    "use strict";

    angular
        .module("app.utils")
        .service("appUtils.errorHandler", errorHandler);


    function errorHandler(uiNotifications, APP_SETTINGS, messages){

        var _this = this;

        this.config = {
            "CUSTOM_HANDLER": uiNotifications.popup,
            "SHOW_MESSAGE": APP_SETTINGS.SHOW_UI_MESSAGES,
            "DEV_MODE": APP_SETTINGS.DEVELOPMENT
        };

        this.STATUS = {
            "SUCCESS": true,
            "FAIL": false
        };

        var uiComponent = _this.config.CUSTOM_HANDLER || window.alert;

        // Handle response status and inform about it user.
        this.check = function(response, status, config) {

            if (status == -1) {
                _this.config.DEV_MODE && siteDisabledException(response, status, config);
                return false;
            }

            if (!response && status !== 404) {
                _this.config.SHOW_MESSAGE && uiComponent(messages.CAN_NOT_ESTABLISH_CONNECTION);
                return false;
            }

            if (status == 400) {
                _this.config.DEV_MODE && handleBadRequestException(response, status, config);
                return false;
            }

            if (status == 401) {
                _this.config.DEV_MODE && authorizationDeniedException(response, status, config);
                return false;
            }

            if (status == 403) {
                _this.config.DEV_MODE && serverDisabledException(response, status, config);
                return false;
            }

            if (status == 404) {
                _this.config.DEV_MODE && handleNotFoundException(response, status, config);
                config.url.indexOf('/login') > -1 && _this.config.SHOW_MESSAGE && uiComponent(response.message);
                return false;
            }

            if (status == 409) {
                _this.config.DEV_MODE && conflictException(response, status, config);
                config.url.indexOf('/login') > -1 && _this.config.SHOW_MESSAGE && uiComponent(response.message);
                return false;
            }

            if (status == 415) {
                _this.config.DEV_MODE && incorrectMediaTypeException(response, status, config);
                return false;
            }

            if (status == 500) {
                _this.config.DEV_MODE && handleServerException(response, status, config);
                return false;
            }

            return true;

        };

        function authorizationDeniedException(response, status, config){
            displayCommonResponseInfo(response, status, config);
            console.error("Details", messages.ATTEMPT_USE_HTTP_REQUEST_WITHOUT_PERMISSION);
        }

        function handleBadRequestException(response, status, config){
            displayCommonResponseInfo(response, status, config);
        }

        function incorrectMediaTypeException(response, status, config){
            displayCommonResponseInfo({message: "Incorrect media type."}, status, config);
        }

        function handleNotFoundException(response, status, config){
            displayCommonResponseInfo(response, status, config);
        }

        function conflictException(response, status, config){
            handleNotFoundException(response, status, config);
        }

        function handleServerException(response, status, config){
            displayCommonResponseInfo(response, status, config);
        }

        function siteDisabledException(response, status, config){
            displayCommonResponseInfo(messages.SITE_DISABLED_403, status, config);
        }

        function displayCommonResponseInfo(response, status, config){
            console.info("Url: " + config.url);
            console.warn("Http status: " + status);
            console.error("Response message: ", response.message || response);
        }

    }

    errorHandler.$inject = [
        "appUtils.uiNotifications",
        "app.SETTINGS",
        "appConstant.messages"
    ];

})();