/**
 * Tabs - jQuery plugin for accessible, unobtrusive tabs
 * @requires jQuery v1.1.1
 *
 * http://stilbuero.de/tabs/
 *
 * Copyright (c) 2006 Klaus Hartl (stilbuero.de)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 *
 * Version: 2.7.4
 */

(function($) {
$.extend({
    tabs: {
        remoteCount: 0
    }
});

$.fn.tabs = function(initial, settings) {
    if (typeof initial == 'object') settings = initial;
    settings = $.extend({
        initial: (initial && typeof initial == 'number' && initial > 0) ? --initial : 0,
        disabled: null,
        bookmarkable: $.ajaxHistory ? true : false,
        remote: false,
        spinner: 'Loading…',
        hashPrefix: 'remote-tab-',
        fxFade: null,
        fxSlide: null,
        fxShow: null,
        fxHide: null,
        fxSpeed: 'normal',
        fxShowSpeed: null,
        fxHideSpeed: null,
        fxAutoHeight: false,
        onClick: null,
        onHide: null,
        onShow: null,
        navClass: null,
        selectedClass: 'here',
        disabledClass: 'tabs-disabled',
        containerClass: 'tabs-content',
        hideClass: 'hide',
        loadingClass: 'tabs-loading',
        tabStruct: 'div'
    }, settings || {});
    
    $.browser.msie6 = $.browser.msie && ($.browser.version && $.browser.version < 7 || /MSIE 6.0/.test(navigator.userAgent));

    function unFocus() {
        scrollTo(0, 0);
    }

    return this.each(function() {
        
        var container = this;

        var nav = $('ul.' + settings.navClass, container);
        nav = nav.size() && nav || $('>ul:eq(0)', container);
        var tabs = $('a', nav);
        
        if (settings.remote) {
            tabs.each(function() {
                var id = settings.hashPrefix + (++$.tabs.remoteCount), hash = '#' + id, url = this.href;
                this.href = hash;
                $('<div id="' + id + '" class="' + settings.containerClass + '"></div>').appendTo(container);

                $(this).bind('loadRemoteTab', function(e, callback) {
                    var $$ = $(this).addClass(settings.loadingClass), span = $('span', this)[0], tabTitle = span.innerHTML;
                    if (settings.spinner) {
                        span.innerHTML = '<em>' + settings.spinner + '</em>';
                    }
                    setTimeout(function() { 
                        $(hash).load(url, function() {
                            if (settings.spinner) {
                                span.innerHTML = tabTitle;
                            }
                            $$.removeClass(settings.loadingClass);
                            callback && callback();
                        });
                    }, 0);
                });

            });
        }

        var containers = $('div.' + settings.containerClass, container);
        containers = containers.size() && containers || $('>' + settings.tabStruct, container);

        nav.is('.' + settings.navClass) || nav.addClass(settings.navClass);
        containers.each(function() {
            var $$ = $(this);
            $$.is('.' + settings.containerClass) || $$.addClass(settings.containerClass);
        });

        var hasSelectedClass = $('li', nav).index( $('li.' + settings.selectedClass, nav)[0] );
        if (hasSelectedClass >= 0) {
           settings.initial = hasSelectedClass;
        }
        var lochash = api.getCarryOver() || location.hash;
        // after buy control posts, this these two lines reset the hash in url
        var re = new RegExp(lochash);
        if (location.hash.match(lochash) == null) location.hash = lochash;
        if (lochash) {
            tabs.each(function(i) {
                if (this.hash == lochash) {
                    settings.initial = i;

                    if (($.browser.msie || $.browser.opera) && !settings.remote) {
                        var toShow = $(lochash);
                        var toShowId = toShow.attr('id');
                        toShow.attr('id', '');
                        setTimeout(function() {
                            toShow.attr('id', toShowId);
                        }, 500);
                    }
                    unFocus();
                    return false;
                }
            });
        }
        if ($.browser.msie) {
            unFocus();
        }

        containers.filter(':eq(' + settings.initial + ')').show().end().not(':eq(' + settings.initial + ')').addClass(settings.hideClass);
        $('li', nav).removeClass(settings.selectedClass).eq(settings.initial).addClass(settings.selectedClass);

        tabs.eq(settings.initial).trigger('loadRemoteTab').end();


        if (settings.fxAutoHeight) {

            var _setAutoHeight = function(reset) {

                var heights = $.map(containers.get(), function(el) {
                    var h, jq = $(el);
                    if (reset) {
                        if ($.browser.msie6) {
                            el.style.removeExpression('behaviour');
                            el.style.height = '';
                            el.minHeight = null;
                        }
                        h = jq.css({'min-height': ''}).height();
                    } else {
                        h = jq.height();
                    }
                    return h;
                }).sort(function(a, b) {
                    return b - a;
                });
                if ($.browser.msie6) {
                    containers.each(function() {
                        this.minHeight = heights[0] + 'px';
                        this.style.setExpression('behaviour', 'this.style.height = this.minHeight ? this.minHeight : "1px"');
                    });
                } else {
                    containers.css({'min-height': heights[0] + 'px'});
                }
            };

            _setAutoHeight();

            var cachedWidth = container.offsetWidth;
            var cachedHeight = container.offsetHeight;
            var watchFontSize = $('#tabs-watch-font-size').get(0) || $('<span id="tabs-watch-font-size">M</span>').css({display: 'block', position: 'absolute', visibility: 'hidden'}).appendTo(document.body).get(0);
            var cachedFontSize = watchFontSize.offsetHeight;
            setInterval(function() {
                var currentWidth = container.offsetWidth;
                var currentHeight = container.offsetHeight;
                var currentFontSize = watchFontSize.offsetHeight;
                if (currentHeight > cachedHeight || currentWidth != cachedWidth || currentFontSize != cachedFontSize) {
                    _setAutoHeight((currentWidth > cachedWidth || currentFontSize < cachedFontSize));
                    cachedWidth = currentWidth;
                    cachedHeight = currentHeight;
                    cachedFontSize = currentFontSize;
                }
            }, 50);
        }


        var showAnim = {}, hideAnim = {}, showSpeed = settings.fxShowSpeed || settings.fxSpeed, hideSpeed = settings.fxHideSpeed || settings.fxSpeed;
        if (settings.fxSlide || settings.fxFade) {
            if (settings.fxSlide) {
                showAnim['height'] = 'show';
                hideAnim['height'] = 'hide';
            }
            if (settings.fxFade) {
                showAnim['opacity'] = 'show';
                hideAnim['opacity'] = 'hide';
            }
        } else {
            if (settings.fxShow) {
                showAnim = settings.fxShow;
            } else { 
                showAnim['min-width'] = 0;
                showSpeed = 1;
            }
            if (settings.fxHide) {
                hideAnim = settings.fxHide;
            } else {
                hideAnim['min-width'] = 0;
                hideSpeed = 1;
            }
        }

        var onClick = settings.onClick, onHide = settings.onHide, onShow = settings.onShow;

        tabs.bind('triggerTab', function() {
            var li = $(this).parents('li:eq(0)');
            if (container.locked || li.is('.' + settings.selectedClass) || li.is('.' + settings.disabledClass)) {
                return false;
            }
            var hash = this.hash;
            if ($.browser.msie) {

                $(this).trigger('click');
                if (settings.bookmarkable) {
                    $.ajaxHistory.update(hash);
                    location.hash = hash.replace('#', '');
                }

            } else if ($.browser.safari) {

                var tempForm = $('<form action="' + hash + '"><div><input type="submit" value="h" /></div></form>').get(0);
                tempForm.submit();
                $(this).trigger('click');
                if (settings.bookmarkable) {
                    $.ajaxHistory.update(hash);
                }

            } else {

                if (settings.bookmarkable) {
                    location.hash = hash.replace('#', '');
                } else {
                    $(this).trigger('click');
                }

            }

        });

        tabs.bind('disableTab', function() {
            var li = $(this).parents('li:eq(0)');
            if ($.browser.safari) {
                li.animate({ opacity: 0 }, 1, function() {
                   li.css({opacity: ''});
                });
            }
            li.addClass(settings.disabledClass);

        });

        if (settings.disabled && settings.disabled.length) {
            for (var i = 0, k = settings.disabled.length; i < k; i++) {
                tabs.eq(--settings.disabled[i]).trigger('disableTab').end();
            }
        };

        tabs.bind('enableTab', function() {
            var li = $(this).parents('li:eq(0)');
            li.removeClass(settings.disabledClass);
            if ($.browser.safari) {
                li.animate({ opacity: 1 }, 1, function() {
                    li.css({opacity: ''});
                });
            }
        });

        tabs.bind('click', function(e) {
            
            var trueClick = e.clientX;
            var clicked = this, li = $(this).parents('li:eq(0)'), toShow = $(this.hash), toHide = containers.filter(':visible');
            api.setCarryOver(this.hash);
            if (container['locked'] || li.is('.' + settings.selectedClass) || li.is('.' + settings.disabledClass) || typeof onClick == 'function' && onClick(this, toShow[0], toHide[0]) === false) {
                this.blur();
                return false;
            }

            container['locked'] = true;

            if (toShow.size()) {

                if ($.browser.msie && settings.bookmarkable) {
                    var toShowId = this.hash.replace('#', '');
                    toShow.attr('id', '');
                    setTimeout(function() {
                        toShow.attr('id', toShowId);
                    }, 0);
                }

                var resetCSS = { display: '', overflow: '', height: '' };
                if (!$.browser.msie) {
                    resetCSS['opacity'] = '';
                }
                
                function switchTab() {
                    if (settings.bookmarkable && trueClick) {
                        $.ajaxHistory.update(clicked.hash);
                    }
                    toHide.animate(hideAnim, hideSpeed, function() {
                        $(clicked).parents('li:eq(0)').addClass(settings.selectedClass).siblings().removeClass(settings.selectedClass);
                        toHide.addClass(settings.hideClass).css(resetCSS);
                        if (typeof onHide == 'function') {
                            onHide(clicked, toShow[0], toHide[0]);
                        }
                        if (!(settings.fxSlide || settings.fxFade || settings.fxShow)) {
                            toShow.css('display', 'block');
                        }
                        toShow.animate(showAnim, showSpeed, function() {
                            toShow.removeClass(settings.hideClass).css(resetCSS);
                            if ($.browser.msie) {
                                toHide[0].style.filter = '';
                                toShow[0].style.filter = '';
                            }
                            if (typeof onShow == 'function') {
                                onShow(clicked, toShow[0], toHide[0]);
                            }
                            container['locked'] = null;
                        });
                    });
                }

                if (!settings.remote) {
                    switchTab();
                } else {
                    $(clicked).trigger('loadRemoteTab', [switchTab]);
                }

            } else {
                alert('There is no such container.');
            }

            var scrollX = window.pageXOffset || document.documentElement && document.documentElement.scrollLeft || document.body.scrollLeft || 0;
            var scrollY = window.pageYOffset || document.documentElement && document.documentElement.scrollTop || document.body.scrollTop || 0;
            setTimeout(function() {
                window.scrollTo(scrollX, scrollY);
            }, 0);

            this.blur();

            return settings.bookmarkable && !!trueClick;

        });

        if (settings.bookmarkable) {
            $.ajaxHistory.initialize(function() {
                tabs.eq(settings.initial).trigger('click').end();
            });
        }

    });

};

var tabEvents = ['triggerTab', 'disableTab', 'enableTab'];
for (var i = 0; i < tabEvents.length; i++) {
    $.fn[tabEvents[i]] = (function(tabEvent) {
        return function(tab) {
            return this.each(function() {
                var nav = $('ul.tabs-nav' , this);
                nav = nav.size() && nav || $('>ul:eq(0)', this);
                var a;
                if (!tab || typeof tab == 'number') {
                    a = $('li a', nav).eq((tab && tab > 0 && tab - 1 || 0));
                } else if (typeof tab == 'string') {
                    a = $('li a[href="#' + tab + '"]', nav);
                }
                a.trigger(tabEvent);
            });
        };
    })(tabEvents[i]);
}

$.fn.activeTab = function() {
    var selectedTabs = [];
    this.each(function() {
        var nav = $('ul.tabs-nav' , this);
        nav = nav.size() && nav || $('>ul:eq(0)', this);
        var lis = $('li', nav);
        selectedTabs.push(lis.index( lis.filter('.tabs-selected')[0] ) + 1);
    });
    return selectedTabs[0];
};

})(jQuery);