/*!
 * jQuery twitter bootstrap wizard plugin
 * Examples and documentation at: http://github.com/VinceG/twitter-bootstrap-wizard
 * version 1.0
 * Requires jQuery v1.3.2 or later
 * Supports Bootstrap 2.2.x, 2.3.x, 3.0
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * Authors: Vadim Vincent Gabriel (http://vadimg.com), Jason Gill (www.gilluminate.com)
 */
;
(function ($) {
    var bootstrapWizardCreate = function (element, options) {
        var element = $(element);
        var obj = this;

        // selector skips any 'li' elements that do not contain a child with a tab data-toggle
        var baseItemSelector = 'li:has([data-toggle="tab"])';

        // Merge options with defaults
        var $settings = $.extend({}, $.fn.bootstrapWizard.defaults, options);
        var $activeTab = null;
        var $navigation = null;

        this.rebindClick = function (selector, fn) {
            selector.unbind('click', fn).bind('click', fn);
        }

        this.fixNavigationButtons = function () {
            // Get the current active tab
            if (!$activeTab.length) {
                // Select first one
                $navigation.find('a:first').tab('show');
                $activeTab = $navigation.find(baseItemSelector + ':first');
            }

            // See if we're currently in the first/last then disable the previous and last buttons
            $($settings.previousSelector, element).toggleClass('disabled', (obj.firstIndex() >= obj.currentIndex()));
            $($settings.nextSelector, element).toggleClass('disabled', (obj.currentIndex() >= obj.navigationLength()));

            // We are unbinding and rebinding to ensure single firing and no double-click errors
            obj.rebindClick($($settings.nextSelector, element), obj.next);
            obj.rebindClick($($settings.previousSelector, element), obj.previous);
            obj.rebindClick($($settings.lastSelector, element), obj.last);
            obj.rebindClick($($settings.firstSelector, element), obj.first);

            if ($settings.onTabShow && typeof $settings.onTabShow === 'function' && $settings.onTabShow($activeTab, $navigation, obj.currentIndex()) === false) {
                return false;
            }
        };

        this.next = function (e) {

            // If we clicked the last then dont activate this
            if (element.hasClass('last')) {
                return false;
            }

            if ($settings.onNext && typeof $settings.onNext === 'function' && $settings.onNext($activeTab, $navigation, obj.nextIndex()) === false) {
                return false;
            }

            // Did we click the last button
            $index = obj.nextIndex();
            if ($index > obj.navigationLength()) {
            } else {
                $navigation.find(baseItemSelector + ':eq(' + $index + ') a').tab('show');
            }
        };

        this.previous = function (e) {

            // If we clicked the first then dont activate this
            if (element.hasClass('first')) {
                return false;
            }

            if ($settings.onPrevious && typeof $settings.onPrevious === 'function' && $settings.onPrevious($activeTab, $navigation, obj.previousIndex()) === false) {
                return false;
            }

            $index = obj.previousIndex();
            if ($index < 0) {
            } else {
                $navigation.find(baseItemSelector + ':eq(' + $index + ') a').tab('show');
            }
        };

        this.first = function (e) {
            if ($settings.onFirst && typeof $settings.onFirst === 'function' && $settings.onFirst($activeTab, $navigation, obj.firstIndex()) === false) {
                return false;
            }

            // If the element is disabled then we won't do anything
            if (element.hasClass('disabled')) {
                return false;
            }
            $navigation.find(baseItemSelector + ':eq(0) a').tab('show');

        };
        this.last = function (e) {
            if ($settings.onLast && typeof $settings.onLast === 'function' && $settings.onLast($activeTab, $navigation, obj.lastIndex()) === false) {
                return false;
            }

            // If the element is disabled then we won't do anything
            if (element.hasClass('disabled')) {
                return false;
            }
            $navigation.find(baseItemSelector + ':eq(' + obj.navigationLength() + ') a').tab('show');
        };
        this.currentIndex = function () {
            return $navigation.find(baseItemSelector).index($activeTab);
        };
        this.firstIndex = function () {
            return 0;
        };
        this.lastIndex = function () {
            return obj.navigationLength();
        };
        this.getIndex = function (e) {
            return $navigation.find(baseItemSelector).index(e);
        };
        this.nextIndex = function () {
            return $navigation.find(baseItemSelector).index($activeTab) + 1;
        };
        this.previousIndex = function () {
            return $navigation.find(baseItemSelector).index($activeTab) - 1;
        };
        this.navigationLength = function () {
            return $navigation.find(baseItemSelector).length - 1;
        };
        this.activeTab = function () {
            return $activeTab;
        };
        this.nextTab = function () {
            return $navigation.find(baseItemSelector + ':eq(' + (obj.currentIndex() + 1) + ')').length ? $navigation.find(baseItemSelector + ':eq(' + (obj.currentIndex() + 1) + ')') : null;
        };
        this.previousTab = function () {
            if (obj.currentIndex() <= 0) {
                return null;
            }
            return $navigation.find(baseItemSelector + ':eq(' + parseInt(obj.currentIndex() - 1) + ')');
        };
        this.show = function (index) {
            return element.find(baseItemSelector + ':eq(' + index + ') a').tab('show');
        };
        this.disable = function (index) {
            $navigation.find(baseItemSelector + ':eq(' + index + ')').addClass('disabled');
        };
        this.enable = function (index) {
            $navigation.find(baseItemSelector + ':eq(' + index + ')').removeClass('disabled');
        };
        this.hide = function (index) {
            $navigation.find(baseItemSelector + ':eq(' + index + ')').hide();
        };
        this.display = function (index) {
            $navigation.find(baseItemSelector + ':eq(' + index + ')').show();
        };
        this.remove = function (args) {
            var $index = args[0];
            var $removeTabPane = typeof args[1] != 'undefined' ? args[1] : false;
            var $item = $navigation.find(baseItemSelector + ':eq(' + $index + ')');

            // Remove the tab pane first if needed
            if ($removeTabPane) {
                var $href = $item.find('a').attr('href');
                $($href).remove();
            }

            // Remove menu item
            $item.remove();
        };

        var innerTabClick = function (e) {
            // Get the index of the clicked tab
            var clickedIndex = $navigation.find(baseItemSelector).index($(e.currentTarget).parent(baseItemSelector));
            if ($settings.onTabClick && typeof $settings.onTabClick === 'function' && $settings.onTabClick($activeTab, $navigation, obj.currentIndex(), clickedIndex) === false) {
                return false;
            }
        };

        var innerTabShown = function (e) {  // use shown instead of show to help prevent double firing
            $element = $(e.target).parent();
            var nextTab = $navigation.find(baseItemSelector).index($element);

            // If it's disabled then do not change
            if ($element.hasClass('disabled')) {
                return false;
            }

            if ($settings.onTabChange && typeof $settings.onTabChange === 'function' && $settings.onTabChange($activeTab, $navigation, obj.currentIndex(), nextTab) === false) {
                return false;
            }

            $activeTab = $element; // activated tab
            obj.fixNavigationButtons();
        };

        this.resetWizard = function () {

            // remove the existing handlers
            $('a[data-toggle="tab"]', $navigation).off('click', innerTabClick);
            $('a[data-toggle="tab"]', $navigation).off('shown shown.bs.tab', innerTabShown);

            // reset elements based on current state of the DOM
            $navigation = element.find('ul:first', element);
            $activeTab = $navigation.find(baseItemSelector + '.active', element);

            // re-add handlers
            $('a[data-toggle="tab"]', $navigation).on('click', innerTabClick);
            $('a[data-toggle="tab"]', $navigation).on('shown shown.bs.tab', innerTabShown);

            obj.fixNavigationButtons();
        };

        $navigation = element.find('ul:first', element);
        $activeTab = $navigation.find(baseItemSelector + '.active', element);

        if (!$navigation.hasClass($settings.tabClass)) {
            $navigation.addClass($settings.tabClass);
        }

        // Load onInit
        if ($settings.onInit && typeof $settings.onInit === 'function') {
            $settings.onInit($activeTab, $navigation, 0);
        }

        // Load onShow
        if ($settings.onShow && typeof $settings.onShow === 'function') {
            $settings.onShow($activeTab, $navigation, obj.nextIndex());
        }

        $('a[data-toggle="tab"]', $navigation).on('click', innerTabClick);

        // attach to both shown and shown.bs.tab to support Bootstrap versions 2.3.2 and 3.0.0
        $('a[data-toggle="tab"]', $navigation).on('shown shown.bs.tab', innerTabShown);

        this.fixNavigationButtons();
    };
    $.fn.bootstrapWizard = function (options) {
        //expose methods
        if (typeof options == 'string') {
            var args = Array.prototype.slice.call(arguments, 1)
            if (args.length === 1) {
                args.toString();
            }
            return this.data('bootstrapWizard')[options](args);
        }
        return this.each(function (index) {
            var element = $(this);
            // Return early if this element already has a plugin instance
            if (element.data('bootstrapWizard')) return;
            // pass options to plugin constructor
            var wizard = new bootstrapWizardCreate(element, options);
            // Store plugin object in this element's data
            element.data('bootstrapWizard', wizard);
        });
    };

// expose options
    $.fn.bootstrapWizard.defaults = {
        tabClass: 'nav nav-pills',
        nextSelector: '.wizard li.next',
        previousSelector: '.wizard li.previous',
        firstSelector: '.wizard li.first',
        lastSelector: '.wizard li.last',
        onShow: null,
        onInit: null,
        onNext: null,
        onPrevious: null,
        onLast: null,
        onFirst: null,
        onTabChange: null,
        onTabClick: null,
        onTabShow: null
    };

})(jQuery);