/**
 * Created by robin on 10/24/15.
 */

(function () {
    'use strict';
    angular.module('luticate2Utils')
        .factory('luRequest', ['$q', '$http', 'luBusyBusiness', function ($q, $http, luBusyBusiness) {

            var luRequest = {};

            luRequest.hooks = {
                before: [],
                resolve: [],
                reject: []
            };

            luRequest.addHook = function(type, callback)
            {
                if (luRequest.hooks.hasOwnProperty(type)) {
                    luRequest.hooks[type].push(callback);
                }
            };

            luRequest.get = function(url, dataGet, luBusyGroups)
            {
                return luRequest.request(url, 'GET', dataGet, null, luBusyGroups);
            };

            luRequest.post = function(url, dataGet, dataPost, luBusyGroups)
            {
                return luRequest.request(url, 'POST', dataGet, dataPost, luBusyGroups);
            };

            luRequest.put = function(url, dataGet, dataPost, luBusyGroups)
            {
                return luRequest.request(url, 'PUT', dataGet, dataPost, luBusyGroups);
            };

            luRequest.delete = function(url, dataGet, dataPost, luBusyGroups)
            {
                return luRequest.request(url, 'DELETE', dataGet, dataPost, luBusyGroups);
            };

            function reject(url, method, dataGet, dataPost, luBusyGroups, deferred, data, status)
            {
                var error = {
                    data: data,
                    status: status
                };
                for (var i = 0; i < luRequest.hooks.reject.length; ++i) {
                    luRequest.hooks.reject[i](url, method, dataGet, dataPost, luBusyGroups, error);
                }
                deferred.reject(error);
                if (luBusyGroups != null) {
                    luBusyBusiness.reject(luBusyGroups, error);
                }
            }

            function resolve(url, method, dataGet, dataPost, luBusyGroups, deferred, data)
            {
                for (var i = 0; i < luRequest.hooks.resolve.length; ++i) {
                    luRequest.hooks.resolve[i](url, method, dataGet, dataPost, luBusyGroups, data);
                }
                deferred.resolve(data.data);
                if (luBusyGroups != null) {
                    luBusyBusiness.resolve(luBusyGroups);
                }
            }

            luRequest.request = function(url, method, dataGet, dataPost, luBusyGroups)
            {
                if (luBusyGroups != null) {
                    luBusyBusiness.initGroups(luBusyGroups);
                }
                
                var deferred = $q.defer();

                url = url.replace(/\/+$/, '');

                var params = {
                    url: url,
                    method: method,
                    params: dataGet,
                    headers: {}
                };
                if (dataPost != null && dataPost.constructor === FormData) {
                    params.data = dataPost;
                    params.headers['Content-Type'] = undefined;
                }
                else {
                    params.data = JSON.stringify(dataPost);
                    params.headers['Content-Type'] = 'application/json';
                }

                for (var i = 0; i < luRequest.hooks.before.length; ++i) {
                    luRequest.hooks.before[i](url, method, dataGet, dataPost, luBusyGroups);
                }

                $http(params)
                    .then(function (response) {
                        var result = response.data;
                        var status = response.status;
                        if (result == null || typeof result !== 'object') {
                            reject(url, method, dataGet, dataPost, luBusyGroups, deferred, {
                                message: "Failed to parse response",
                                code: status,
                                version: null,
                                data: null
                            }, status);
                        }
                        else if (result.message != null) {
                            reject(url, method, dataGet, dataPost, luBusyGroups, deferred, result, status);
                        }
                        else {
                            resolve(url, method, dataGet, dataPost, luBusyGroups, deferred, result);
                        }
                    }, function (response) {
                        var result = response.data;
                        var status = response.status;
                        if (result == null || typeof result !== 'object') {
                            reject(url, method, dataGet, dataPost, luBusyGroups, deferred, {
                                message: "Failed to parse response",
                                code: status,
                                version: null,
                                data: null
                            }, status);
                        }
                        else {
                            reject(url, method, dataGet, dataPost, luBusyGroups, deferred, result, status);
                        }
                    });
                return deferred.promise;
            };

            return luRequest;
        }]);
})();