/**
 * @module ProjectManager
 */

/**
 * I am the SuperUserManagement which ensures, that the ProjectManager is logged at the server with the password of the one-and-only super user.
 * 
 * @class SuperUserManagement
 * @static
 * @main
 */

 FrameTrail.defineModule('SuperUserManagement', function(){

     var domElement = $(   '<div id="SuperUserManagement" class="ui-blocking-overlay">'
                         + '     <div id="SuperUserBox" class="ui-overlay-box">'
                         + '         <div class="boxTitle">Project Management</div>'
                         + '         <div class="message active"></div>'
                         + '         <input type="password" id="SuperUserPassword">'
                         + '         <button id="SuperUserLoginButton" type="button">Login</button>'
                         + '     </div>'
                         + '</div>'),

         successCallback,
         failCallback;



     domElement.find('#SuperUserLoginButton').click(login);
    domElement.find('#SuperUserPassword').keypress(function(evt){
        if (evt.keyCode === 13) login();
    });





    /**
     * I check wether the user is logged as the super user, and if not, provide the the login interface.
     * 
     * @method ensureAdminAccess
     * @param {Function} success
     * @param {Function} fail
     */
     function ensureAdminAccess(success, fail) {

         isLoggedIn(function() {

             domElement.remove();
             success.call();

         }, function() {

             successCallback = success;
             failCallback    = fail;
             domElement.find('.message').removeClass('error').html('Please enter Master-Password');
             $('body').append(domElement);

         });

     }



     /**
     * I check if the master user is logged in and call the respective successCallback or failCallback
     * 
     * @method isLoggedIn
     * @param {Function} success
     * @param {Function} fail 
     */
     function isLoggedIn(success, fail) {

         $.ajax({
            method:     'POST',
            url:         '../_server/ajaxServer.php',
            dataType:     'json',
            data:         'a=superUserLogin',
            success:     function(response) {
                
                switch (response.code) {

                    case 0:
                        FrameTrail.changeState('loggedIn', true);
                        success.call();
                        break;

                    default:
                        FrameTrail.changeState('loggedIn', false);
                        fail.call();
                        break;

                }


            }

        });

     }



     /**
     * I perform the login request to the server and call afterwards the respective successCallback or failCallback, which were previously stored in module variables
     * by {{crossLink "SuperUserManagement/ensureAdminAccess:method"}}SuperUserManagement/ensureAdminAccess(){{/crossLink}}.
     * 
     * @method login
     */
     function login() {

         $.ajax({
            method:     'POST',
            url:         '../_server/ajaxServer.php',
            dataType:     'json',
            data:         'a=superUserLogin&password=' + domElement.find('#SuperUserPassword').val(),
            success:     function(response) {
                
                switch (response.code) {

                    case 0:
                        domElement.remove();
                        FrameTrail.changeState('loggedIn', true);
                        successCallback.call();
                        break;

                    default:
                        FrameTrail.changeState('loggedIn', false);
                        domElement.find('.message').addClass('error').html('Wrong Master-Password');
                        failCallback.call();
                        break;

                }


            }

        });

     }


     /**
     * I logout the user at the server and afterwards reload the page.
     * 
     * @method logout
     */
     function logout() {

         $.ajax({
            method:     "POST",
            url:        "../_server/ajaxServer.php",
            dataType:   "json",
            data:       "a=superUserLogout",
            success: function(data) {
                FrameTrail.changeState('loggedIn', false);
                location.reload();
            }

        });

     }

    
    return {

        ensureAdminAccess: ensureAdminAccess,

        logout: logout

    };

});