/*
 * Smoothbox v20070814 by Boris Popoff (http://gueschla.com)
 * To be used with mootools 1.1x
 *
 * Based on Cody Lindley's Thickbox, MIT License
 *
 * Licensed under the MIT License:
 *   http://www.opensource.org/licenses/mit-license.php
 */

// on page load call TB_init
window.addEvent('domready', TB_init);

// prevent javascript error before the content has loaded
TB_WIDTH = 0;
TB_HEIGHT = 0;
var TB_doneOnce = 0 ;

// add smoothbox to href elements that have a class of .smoothbox
function TB_init(){
    $$("a.smoothbox").each(function(el){el.onclick=TB_bind});
}

function TB_bind(event) {
    var event = new Event(event);
    // stop default behaviour
    event.preventDefault();
    // remove click border
    this.blur();
    // get caption: either title or name attribute
    var caption = this.title || this.name || "";
    // get rel attribute for image groups
    var group = this.rel || false;
    // display the box for the elements href
    TB_show(caption, this.href, group);
    this.onclick=TB_bind;
    return false;
}


// called when the user clicks on a smoothbox link
function TB_show(caption, url, rel) {

    // create iframe, overlay and box if non-existent

    if ( !$("TB_overlay") )
    {
        new Element('iframe').setProperty('id', 'TB_HideSelect').injectInside(document.body);
        $('TB_HideSelect').setOpacity(0);
        new Element('div').setProperty('id', 'TB_overlay').injectInside(document.body);
        $('TB_overlay').setOpacity(0);
        TB_overlaySize();
        new Element('div').setProperty('id', 'TB_load').injectInside(document.body);
        $('TB_load').innerHTML = "<img src='/gfx/loading.gif' />";
        TB_load_position();
        new Fx.Style('TB_overlay', 'opacity',{duration: 400, transition: Fx.Transitions.sineInOut}).start(0,0.6);
    }

    if ( !$("TB_load") )
    {
        new Element('div').setProperty('id', 'TB_load').injectInside(document.body);
        $('TB_load').innerHTML = "<img src='/gfx/loading.gif' />";
        TB_load_position();
    }

    if ( !$("TB_window") )
    {
        new Element('div').setProperty('id', 'TB_window').injectInside(document.body);
        $('TB_window').setOpacity(0);
    }

    $("TB_overlay").onclick=TB_remove;
    window.onscroll=TB_positionEffect;

    // check if a query string is involved
    var baseURL = url.match(/(.+)?/)[1] || url;

    // regex to check if a href refers to an image
    var imageURL = /\.(jpe?g|png|gif|bmp)/gi;

    // check for images
    if ( baseURL.match(imageURL) ) {
        var dummy = { caption: "", url: "", html: "" };

        var prev = dummy,
            next = dummy,
            imageCount = "";

        // if an image group is given
        if ( rel ) {
            function getInfo(image, id, label) {
                return {
                    caption: image.title,
                    url: image.href,
                    html: "<span id='TB_" + id + "'>&nbsp;&nbsp;<a href='#'>" + label + "</a></span>"
                }
            }

            // find the anchors that point to the group
            var imageGroup = [] ;
            $$("a.smoothbox").each(function(el){
                if (el.rel==rel) {imageGroup[imageGroup.length] = el ;}
            })

            var foundSelf = false;

            // loop through the anchors, looking for ourself, saving information about previous and next image
            for (var i = 0; i < imageGroup.length; i++) {
                var image = imageGroup[i];
                var urlTypeTemp = image.href.match(imageURL);

                // look for ourself
                if ( image.href == url ) {
                    foundSelf = true;
                    imageCount = "Image " + (i + 1) + " of "+ (imageGroup.length);
                } else {
                    // when we found ourself, the current is the next image
                    if ( foundSelf ) {
                        next = getInfo(image, "next", "Next &gt;");
                        // stop searching
                        break;
                    } else {
                        // didn't find ourself yet, so this may be the one before ourself
                        prev = getInfo(image, "prev", "&lt; Prev");
                    }
                }
            }
        }

        imgPreloader = new Image();
        imgPreloader.onload = function() {
            imgPreloader.onload = null;

            // Resizing large images
            var x = window.getWidth() - 150;
            var y = window.getHeight() - 150;
            var imageWidth = imgPreloader.width;
            var imageHeight = imgPreloader.height;
            if (imageWidth > x) {
                imageHeight = imageHeight * (x / imageWidth);
                imageWidth = x;
                if (imageHeight > y) {
                    imageWidth = imageWidth * (y / imageHeight);
                    imageHeight = y;
                }
            } else if (imageHeight > y) {
                imageWidth = imageWidth * (y / imageHeight);
                imageHeight = y;
                if (imageWidth > x) {
                    imageHeight = imageHeight * (x / imageWidth);
                    imageWidth = x;
                }
            }
            // End Resizing

            // TODO don't use globals
            TB_WIDTH = imageWidth + 30;
            TB_HEIGHT = imageHeight + 60;

            // TODO empty window content instead
            $("TB_window").innerHTML += "<a href='' id='TB_ImageOff' title='Close'><img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' alt='"+caption+"'/></a>" + "<div id='TB_caption'>"+caption+"<div id='TB_secondLine'>" + imageCount + prev.html + next.html + "</div></div><div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a></div>";

            $("TB_closeWindowButton").onclick = TB_remove;

            function buildClickHandler(image) {
                return function() {
                    $("TB_window").remove();
                    new Element('div').setProperty('id', 'TB_window').injectInside(document.body);

                    TB_show(image.caption, image.url, rel);
                    return false;
                };
            }
            var goPrev = buildClickHandler(prev);
            var goNext = buildClickHandler(next);
            if ( $('TB_prev') ) {
                $("TB_prev").onclick = goPrev;
            }

            if ( $('TB_next') ) {
                $("TB_next").onclick = goNext;
            }

            document.onkeydown = function(event) {
                var event = new Event(event);
                switch(event.code) {
                case 27:
                    TB_remove();
                    break;
                case 190:
                    if( $('TB_next') ) {
                        document.onkeydown = null;
                        goNext();
                    }
                    break;
                case 188:
                    if( $('TB_prev') ) {
                        document.onkeydown = null;
                        goPrev();
                    }
                    break;
                }
            }

            // TODO don't remove loader etc., just hide and show later
            $("TB_ImageOff").onclick = TB_remove;
            TB_position();
            TB_showWindow();
        }
        imgPreloader.src = url;

    } else { //code to show html pages

        var queryString = url.match(/\?(.+)/)[1];
        var params = TB_parseQuery( queryString );

        TB_WIDTH = (params['width']*1) + 30;
        TB_HEIGHT = (params['height']*1) + 40;

        var ajaxContentW = TB_WIDTH - 30,
            ajaxContentH = TB_HEIGHT - 45;

        if(url.indexOf('TB_iframe') != -1){
            urlNoQuery = url.split('TB_');
            $("TB_window").innerHTML += "<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a></div></div><iframe frameborder='0' hspace='0' src='"+urlNoQuery[0]+"' id='TB_iframeContent' name='TB_iframeContent' style='width:"+(ajaxContentW + 29)+"px;height:"+(ajaxContentH + 17)+"px;' onload='TB_showWindow()'> </iframe>";
        } else {
            $("TB_window").innerHTML += "<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'>close</a></div></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px;'></div>";
        }

        $("TB_closeWindowButton").onclick = TB_remove;

            if(url.indexOf('TB_inline') != -1){
                $("TB_ajaxContent").innerHTML = ($(params['inlineId']).innerHTML);
                TB_position();
                TB_showWindow();
            }else if(url.indexOf('TB_iframe') != -1){
                TB_position();
                if(frames['TB_iframeContent'] == undefined){//be nice to safari
                    $(document).keyup( function(e){ var key = e.keyCode; if(key == 27){TB_remove()} });
                    TB_showWindow();
                }
            }else{
                var handlerFunc = function(){
                    TB_position();
                    TB_showWindow();
                };
                var myRequest = new Ajax(url, {method: 'get',update: $("TB_ajaxContent"),onComplete: handlerFunc}).request();
            }
    }

    window.onresize=function(){ TB_position(); TB_load_position(); TB_overlaySize();}

    document.onkeyup = function(event){
        var event = new Event(event);
        if(event.code == 27){ // close
            TB_remove();
        }
    }

}

//helper functions below

function TB_showWindow(){
    //$("TB_load").remove();
    //$("TB_window").setStyles({display:"block",opacity:'0'});

    if (TB_doneOnce==0) {
        TB_doneOnce = 1;
        var myFX = new Fx.Style('TB_window', 'opacity',{duration: 250, transition: Fx.Transitions.sineInOut, onComplete:function(){if ($('TB_load')) { $('TB_load').remove();}} }).start(0,1);
    } else {
        $('TB_window').setStyle('opacity',1);
        if ($('TB_load')) { $('TB_load').remove();}
    }
}

function TB_remove() {
     $("TB_overlay").onclick=null;
    document.onkeyup=null;
    document.onkeydown=null;

    if ($('TB_imageOff')) $("TB_imageOff").onclick=null;
    if ($('TB_closeWindowButton')) $("TB_closeWindowButton").onclick=null;
    if ( $('TB_prev') ) { $("TB_prev").onclick = null; }
    if ( $('TB_next') ) { $("TB_next").onclick = null; }

    new Fx.Style('TB_window', 'opacity',{duration: 250, transition: Fx.Transitions.sineInOut, onComplete:function(){$('TB_window').remove();} }).start(1,0);
    new Fx.Style('TB_overlay', 'opacity',{duration: 400, transition: Fx.Transitions.sineInOut, onComplete:function(){$('TB_overlay').remove();} }).start(0.6,0);

    window.onscroll=null;
    window.onresize=null;

    $('TB_HideSelect').remove();
    TB_init();
    TB_doneOnce = 0;
    return false;
}

function TB_position() {
    $("TB_window").setStyles({width: TB_WIDTH+'px',
                 left: (window.getScrollLeft() + (window.getWidth() - TB_WIDTH)/2)+'px',
                 top: (window.getScrollTop() + (window.getHeight() - TB_HEIGHT)/2)+'px'});
}

function TB_positionEffect() {
    new Fx.Styles('TB_window', {duration: 75, transition: Fx.Transitions.sineInOut}).start({
        'left':(window.getScrollLeft() + (window.getWidth() - TB_WIDTH)/2)+'px',
        'top':(window.getScrollTop() + (window.getHeight() - TB_HEIGHT)/2)+'px'});
}

function TB_overlaySize(){
    // we have to set this to 0px before so we can reduce the size / width of the overflow onresize
    $("TB_overlay").setStyles({"height": '0px', "width": '0px'});
    $("TB_HideSelect").setStyles({"height": '0px', "width": '0px'});
    $("TB_overlay").setStyles({"height": window.getScrollHeight()+'px', "width": window.getScrollWidth()+'px'});
    $("TB_HideSelect").setStyles({"height": window.getScrollHeight()+'px',"width": window.getScrollWidth()+'px'});
}

function TB_load_position() {
    if ($("TB_load")) { $("TB_load").setStyles({left: (window.getScrollLeft() + (window.getWidth() - 56)/2)+'px', top: (window.getScrollTop() + ((window.getHeight()-20)/2))+'px',display:"block"}); }
}

function TB_parseQuery ( query ) {
    // return empty object
    if( !query )
        return {};
    var params = {};

    // parse query
    var pairs = query.split(/[;&]/);
    for ( var i = 0; i < pairs.length; i++ ) {
        var pair = pairs[i].split('=');
        if ( !pair || pair.length != 2 )
            continue;
        // unescape both key and value, replace "+" with spaces in value
        params[unescape(pair[0])] = unescape(pair[1]).replace(/\+/g, ' ');
   }
   return params;
}