/**
 * The angular tabs module
 * @author: nerv
 * @version: 0.2.5, 2012-08-25
 */


'use strict';


angular


    .module( 'tabs', [])


    .directive( 'ngTabs', function() {
        return {
            scope: true,
            restrict: 'EAC',
            controller: function( $scope ) {
                $scope.tabs = {
                    index: 0,
                    count: 0
                };

                this.headIndex = 0;
                this.bodyIndex = 0;

                this.getTabHeadIndex = function() {
                    return $scope.tabs.count = ++this.headIndex;
                };

                this.getTabBodyIndex = function() {
                    return ++this.bodyIndex;
                };
            }
        };
    })


    .directive( 'ngTabHead', function() {
        return {
            scope: false,
            restrict: 'EAC',
            require: '^ngTabs',
            link: function( scope, element, attributes, controller ) {
                var index = controller.getTabHeadIndex();
                var value = attributes.ngTabHead;
                var active = /[-*\/%^=!<>&|]/.test( value ) ? scope.$eval( value ) : !!value;

                scope.tabs.index = scope.tabs.index || ( active ? index : null );

                element.bind( 'click', function() {
                    scope.tabs.index = index;
                    scope.$$phase || scope.$apply();
                });

                scope.$watch( 'tabs.index', function() {
                    element.toggleClass( 'active', scope.tabs.index === index );
                });
            }
        };
    })


    .directive( 'ngTabBody', function() {
        return {
            scope: false,
            restrict: 'EAC',
            require: '^ngTabs',
            link: function( scope, element, attributes, controller ) {
                var index = controller.getTabBodyIndex();

                scope.$watch( 'tabs.index', function() {
                    element.toggleClass( attributes.ngTabBody + ' show', scope.tabs.index === index );
                });
            }
        };
    });