(function () {
    'use strict';
    //provides functionality that interacts with server side RESTful endpoints

    var serviceId = 'myBadgesDataContext';
    angular.module('mybadges').factory(serviceId, ['$q', '$http', 'myBadgesConfig', 'DSCacheFactory', datacontext]);

    function datacontext($q, $http, config, DSCacheFactory) {
     
        var service = {
            getDiscoveryForUser: getDiscoveryForUser,
            validateClaim: validateClaim,
            getClaimBadge: getClaimBadge,
            getClaimBadgeUser: getClaimBadgeUser,
            getClaimBadgeByBadge: getClaimBadgeByBadge,
            saveUserClaim: saveUserClaim,
            removeUserClaim: removeUserClaim,
            removeUserBadge: removeUserBadge,
            getClaims: getClaims,
            getClaimById: getClaimById
        };

        return service;


        function saveUserClaim(claim) {
            var request = $http({
                method: "post",
                url: config.mybadgesUrl + '/userclaims/saveUserClaim?cache=' + Date.now(),
                data:claim
            });

            return (request.then(function (response) {
                return response.data;
            }, handleError));
        }

        function removeUserBadge(badge) {
            var request = $http({
                method: "delete",
                url: config.mybadgesUrl + '/userclaims/badge/' + badge.id + '?cache=' + Date.now(),
            });

            return (request.then(function (response) {
                return response.data;
            }, handleError));
        }

        function removeUserClaim(claim) {
            var request = $http({
                method: "delete",
                url: config.mybadgesUrl + '/userclaims/' + claim.id + '?cache=' + Date.now(),
            });

            return (request.then(function (response) {
                return response.data;
            }, handleError));
        }

        function getDiscoveryForUser() {
            var request = $http({
                method: "get",
                url: config.mybadgesUrl + '/discover?cache=' + Date.now()
            });

            return (request.then(function (response) {
                return response.data;
            }, handleError));
        }

        function validateClaim(claimCode, badgeId) 
         {
            var request = $http({
                method: "get",
                url: config.mybadgesUrl + '/discover/validate/' + claimCode + '/' + badgeId + '?cache=' + Date.now()
            });

            return (request.then(function (response) {
                return response.data;
            }, handleError));
        }

        function getClaimById(claimId) {
            var request = $http({
                method: "get",
                url: config.mybadgesUrl + '/userclaims/' + claimId + '/claim?cache=' + Date.now()
            });

            return (request.then(function (response) {
                return response.data;
            }, handleError));
        }

        function getClaimBadge(claimCode) {
            var request = $http({
                method: "get",
                url: config.mybadgesUrl + '/discover/claimbadge/' + claimCode + '?cache=' + Date.now()
            });

            return (request.then(function (response) {
                return response.data;
            }, handleError));
        }

        function getClaimBadgeByBadge(badgeId) {
            var request = $http({
                method: "get",
                url: config.mybadgesUrl + '/discover/claimbadge/badge/' + badgeId + '?cache=' + Date.now()
            });

            return (request.then(function (response) {
                return response.data;
            }, handleError));
        }

        function getClaimBadgeUser(claimCode, claimType) {
            var request = $http({
                method: "get",
                url: config.mybadgesUrl + '/userclaims/' + claimCode + '/latest/' + claimType + '?cache=' + Date.now()
            });

            return (request.then(function (response) {
                return response.data;
            }, handleError));
        }

        function getClaims() {
            var request = $http({
                method: "get",
                url: config.mybadgesUrl + '/userclaims?cache=' + Date.now()
            });

            return (request.then(function (response) {
                return response.data;
            }, handleError));
        }

        function handleError(response) {

            // The API response from the server should be returned in a
            // nomralized format. However, if the request was not handled by the
            // server (or what not handles properly - ex. server error), then we
            // may have to normalize it on our end, as best we can.
            if (
                !angular.isObject(response.data) ||
                !response.data.message
                ) {

                return ($q.reject("An unknown error occurred."));
            }

            // Otherwise, use expected error message.
            return ($q.reject(response.data.message));
        }

        // I transform the successful response, unwrapping the application data
        // from the API response payload.
        function handleSuccess(response) {
            return (response.data);
        }

      
    }
})();