var SLIDES_TEMPLATES            = {
    
                                        start: {
                                            id: 'start',
                                            template: '<table><tbody><tr><td><h1>%header%</h1></td></tr></tbody></table><div class = "b-content">%content%</div><div class = "tmptag"></div>'
                                        },
                                        
                                        section: {
                                            id: 'section',
                                            template: '<table><tbody><tr><td><h1>%header%</h1></td></tr></tbody></table>'
                                        },
                                        
                                        simple: {
                                            template: '<h1>%header1%</h1>\n<h2>%header2%</h2><div class = "b-content">%content%</div>'
                                        },
                                        
                                        columns: {
                                            template: '<h1>%header1%</h1>\n<h2>%header2%</h2>'
                                        },
                                        
                                        end: {
                                            id: 'end',
                                            template: '<div class = "b-content">%content%</div><div class = "tmptag"></div>'
                                        }

                                  }
                                  
var NAVIGATION_TEMPLATE         = '<div id = "navigation">\
                                        <a href = "#prev" title = "&larr; Сюда" id = "arr-prev">&larr;</a>\
                                        <a href = "#notes-mode" title = "Режим заметок" id = "notes-mode">×</a>\
                                        <a href = "#next" title = "Туда &rarr;" id = "arr-next">&rarr;</a>\
                                  </div>';
                                  
var STYLESHEET_TEMPLATE         = '<link rel = "stylesheet" type = "text/css" charset = "utf-8" media = "all" href = "layout/stylesheets/%name%.css" />';

if(typeof($) == 'function') {
    
    var aNotes              = new Array();
    var aSlides             = new Array();
    var isNavigationVisible = false;
    var title               = document.title;
    var aCurrentSlide       = 0;
    var aCtrlPressed        = false;
    var isPreview           = false;
    
    function showSlide(aSlide) {
        aCurrentSlide = aSlide;
    
        $('.l-slide').empty().attr('class', '').addClass('l-slide').append(aSlides[aSlide].template);

        if(typeof(aSlides[aSlide].id) == 'string') {
            $('body').attr('id', aSlides[aSlide].id);
        } else {
            $('body').removeAttr('id');
        }
/*
        if($.browser.opera) {
            $('.inc, .dec').removeClass('inc').removeClass('dec');
        }
*/
        if(navigator.appVersion.indexOf('MSIE') != -1) { // I HATE ie!!!
            $('ul.inc > li').each(function() {
                $(this).addClass('inc');
            });
            $('ul.inc').removeClass('inc');
            
            $('ol.inc > li').each(function() {
                $(this).addClass('inc');
            });
            $('ol.inc').removeClass('inc');
        } else {
            $('.l-slide ul.inc, .l-slide ol.inc').removeClass('inc').children('li').addClass('inc');
        }

        if($('.l-slide .inc').length > 0) {
            if($('.l-slide .inc:first').is('div') && $('.l-slide .inc:first()').children('.inc').length > 0) {
                $('.l-slide .inc:first()').removeClass('inc').addClass('dec');
            }
            $('.l-slide .inc:first()').removeClass('inc').addClass('dec active');
        } else {
            $('.l-slide .dec:last()').addClass('active');
        }
        
        /*$('ul.dec, ol.inc').removeClass('inc').children().addClass('inc');*/
        
        $('#pageNumber').removeClass('hidden'); //.html(aSlide + 1);
        if(aSlide == 0 || aSlide == (aNotes.length - 1)) $('#pageNumber').addClass('hidden');
        
        $('#navigation a').removeClass('disable');
        if($.presentation.isFirstSlide()) $('#arr-prev').addClass('disable');
        if($.presentation.isLastSlide()) $('#arr-next').addClass('disable');
        
        $('#navigation select option').attr('selected', '');
        $($('#navigation select option').get(aSlide)).attr('selected', 'selected');
        
    }
    
    function switchMode(isSlides) {
        /* Swap stylesheets */
        $('link').each(function() {
            if($(this).attr('href').indexOf('notes') != -1 || $(this).attr('href').indexOf('presentation') != -1) {
                $(this).attr('media', $(this).attr('media') == 'all' ? 'print' : 'all');
            }
        });
        
        if(isSlides) {
            /*$.presentation.aCounter = 0;*/
            document.title = $(aNotes[0]).find('h1').html();
            $('body').addClass('presentation');
            $('.l-wrap').empty().append('<div class = "l-slide"></div>').append('<div id = "pageNumber"></div>').append(NAVIGATION_TEMPLATE);
            $('#navigation').fadeTo('slow', 0);

            $('#arr-prev').click(function() {
                if(!$(this).hasClass('disable')) $.presentation.goPrev();
                return false;
            });
            $('#arr-next').click(function() {
                if(!$(this).hasClass('disable')) $.presentation.goNext();
                return false;
            });
            $('#notes-mode').click(function() {
                /*
                if(isPreview) {
                    isPreview = false;
                    $('body').removeClass('preview');
                }
                */
                $.presentation.switchMode();
                return false;
            })
            /*$.presentation.goTo(0);*/
            $.presentation.goToFirst();
        } else {
            document.title = title;
                isPreview = false;
                $('body').removeClass('presentation').removeClass('preview');
            $('.l-wrap').empty().append('<ol id = "slides"></ol>');
            $('#slides').append(aNotes);
        }
        
    }
    
    function canGo(toNext) {
        
        if(aCtrlPressed) {
            if(toNext) {
                $('.inc, .active').removeClass('inc').removeClass('active').addClass('dec');
            } else {
                $('.dec').removeClass('dec').removeClass('active').addClass('inc');
            }
            aSlides[aCurrentSlide].template = $('.l-slide').html();
            return true;
        }
        
        //return true;        
        var result = true;
        
        if(toNext) {
            incCounter = $('.l-slide .inc').length;
            if(incCounter >= 0) {
                $('.l-slide .active').removeClass('active');
                if($('.l-slide .inc:first()').is('div') && $('.l-slide .inc:first()').children('.inc').length > 0) {
                    $('.l-slide .inc:first()').removeClass('inc').addClass('dec');
                    incCounter--;
                }
                $('.l-slide .inc:first()').removeClass('inc').addClass('dec active');
                incCounter--;
            }
            
            result = incCounter <= 0; 
        } else {
            if($('.l-slide .dec').length >= 0) {
                var $last = $('.l-slide .dec:last()');
                if($last.parent().is('div') && $last.parent().hasClass('dec') && $last.parent().find('.dec').length == 1) {
                    $last.parent().removeClass('dec').addClass('inc');
                }
                $('.l-slide .active:last()').removeClass('dec').removeClass('active').addClass('inc');
                $('.l-slide .dec:last()').addClass('active');
            }
            
            result = $('.l-slide .dec').length == 0;
        }
        
        if(result) aSlides[aCurrentSlide].template = $('.l-slide').html();
        
        return result && $('.l-slide .active').length == 0;
    }
    
    /*
     *  Entry point
     */
    $(document).ready(function() {
        
        setEngine();
        
        $('#slides > li:last()').addClass('last');
        aNotes = $('#slides > li');
        for(var i = 0; i < aNotes.length; i++) {
            whatIsThis(i, $(aNotes[i]).clone());
        }

        if(aNotes.length > 0 && aNotes.length == aSlides.length && $.makePresentation( { aSlidesLength  : aSlides.length, 
                                 onShowSlide    : showSlide, 
                                 onSwitchMode   : switchMode,
                                 canGo          : canGo
                              } )) {
        } else {
            $('script').remove();
        }

        var f = function() {
            if(this.href && this.href.indexOf('preview') != -1) {
                isPreview = true;
                $('body').addClass('preview');
            }
            $.presentation.switchMode();
            return false;
        }
        
        $('.b-mode-switcher a').click(f);

        f();

        $('.l-wrap').mousemove(function(e) {
            if(typeof($.presentation) != 'object' || !$.presentation.isSlides) return false;
            
            var height = $('.l-wrap').height();
            if(!isNavigationVisible && e.pageY >= (height - parseInt(height * 0.2))) {
                $('#navigation').fadeTo('slow', 1);
                isNavigationVisible = true;
            } else if(isNavigationVisible && e.pageY <= (height - parseInt(height * 0.2))) {
                $('#navigation').animate( { opacity:0 }, 500 );
                isNavigationVisible = false;
            }
        });
        
        $(document).keydown(function(e) {
            if(e.keyCode == 17 && !aCtrlPressed) {
                aCtrlPressed = true;
            }
        });
        
        $(document).keyup(function(e) {
            aCtrlPressed = aCtrlPressed && e.keyCode != 17;
        });

    });
    
    /*
     *  Check slide type
     */
    function whatIsThis(index, note) {
        //alert($(note).html());
        if(index == 0) {
            isStartSlide(note);
        } else if(index == aNotes.length - 1) {
            isEndSlide(note);
        } else if($(note).hasClass('section')) {
            isSectionSlide(note);
        } else if($(note).children('.column').length > 0) {
            isColumnSlide(note);
        } else {
            isSimpleSlide(note);
        }
    }
    
    function isStartSlide(note) {
        var slide = clone(SLIDES_TEMPLATES.start);
            slide.template = slide.template.replace(/%header%/, $(note).find('h1').html());
            $(note).find('h1').remove();
            slide.template = slide.template.replace(/%content%/, $(note).html());
        
        aSlides.push(slide);
    }
    
    function isEndSlide(note) {
        var slide = clone(SLIDES_TEMPLATES.end);
            slide.template = slide.template.replace(/%content%/, $(note).html());
            
        aSlides.push(slide);
    }
    
    function isSectionSlide(note) {
        var slide = clone(SLIDES_TEMPLATES.section);
            slide.template = slide.template.replace(/%header%/, $(note).find('h1').html());
            
        aSlides.push(slide);
    }
    
    function isColumnSlide(note) {
        var slide = clone(SLIDES_TEMPLATES.columns);
            slide.template = slide.template.replace(/%header1%/, $(note).find('h1').html());
            slide.template = slide.template.replace(/%header2%/, $(note).find('h2').html());
                $(note).find('h1, h2').remove();
                
            $(note).find('.column:first()').addClass('column-left');
            if($(note).find('.column').length > 1) $(note).find('.column:last()').addClass('column-right');
            slide.template = slide.template + $(note).html();
            
        aSlides.push(slide);
    }
    
    function isSimpleSlide(note) {
        var slide = clone(SLIDES_TEMPLATES.simple);
            slide.template = slide.template.replace(/%header1%/, $(note).find('h1').html());
            slide.template = slide.template.replace(/%header2%/, $(note).find('h2').html());
            $(note).children('h1, h2').remove();
            
            $(note).children('blockquote').each(function() {
                slide.id = 'quote';
                if($(this).html().indexOf('«') == -1) $(this).addClass('graphical');
            });
            
            slide.template = slide.template.replace(/%content%/, $(note).html());
        
        aSlides.push(slide);
    }

    /*
     *  Add 2 body class with current engine
     */ 
    function setEngine() {
        
        var engine = '';
            
        if($.browser.mozilla) {
            engine = 'gecko';
        } else if($.browser.safari) {
            engine = 'webkit';
        } else if($.browser.opera) {
            engine = 'opera';
        } else {
            if(navigator.appVersion.indexOf('MSIE 7') != -1) {
                engine = 'ie7';
            } else {
                engine = 'ie';
            }
        }
        
        $('head').append(STYLESHEET_TEMPLATE.replace(/%name%/, engine));
        /*$('body').addClass(engine);*/
    }
    
    /*
     *  Add clone method
     */ 
    function clone(myObj) {
        if(typeof(myObj) != 'object') return myObj;
        if(myObj == null) return myObj;
    
        var myNewObj = new Object();
    
        for(var i in myObj) myNewObj[i] = clone(myObj[i]);
    
    	return myNewObj;
    }
    /*     
    Object.prototype.clone = function() {
        return eval(uneval(this));
    }
    */

}