/*
 * Thickbox 2.1 - jQuery plugin for displaying content in a box above the page
 *
 * Copyright (c) 2006, 2007 Cody Lindley (http://www.codylindley.com)
 *
 * Licensed under the MIT License:
 *   http://www.opensource.org/licenses/mit-license.php
 */

// on page load call TB_init
$(document).ready(TB_init);

// add thickbox to href elements that have a class of .thickbox
function TB_init(){
    $("a.thickbox").click(function(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);
    });
}

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

    // create iframe, overlay and box if non-existent
    if ( !$("#TB_HideSelect").length ) {
        $("body").append("<iframe id='TB_HideSelect'></iframe><div id='TB_overlay'></div><div id='TB_window'></div>");
        $("#TB_overlay").click(TB_remove);
    }
    // TODO replace or check if event is already assigned
    $(window).scroll(TB_position);

    // TODO replace
    TB_overlaySize();

    // TODO create loader only once, hide and show on demand
    $("body").append("<div id='TB_load'><img src='http://api.monkcms.com/Clients/loadingAnimation.gif' /></div>");
    TB_load_position();

    // 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[@rel="+rel+"]").get();
            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 pagesize = TB_getPageSize();
            var x = pagesize[0] - 150;
            var y = pagesize[1] - 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").append("<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").click(TB_remove);

            function buildClickHandler(image) {
                return function() {
                    $("#TB_window").remove();
                    $("body").append("<div id='TB_window'></div>");
                    TB_show(image.caption, image.url, rel);
                    return false;
                };
            }
            var goPrev = buildClickHandler(prev);
            var goNext = buildClickHandler(next);
            if ( prev.html ) {
                $("#TB_prev").click(goPrev);
            }

            if ( next.html ) {
                $("#TB_next").click(goNext);
            }

            // TODO use jQuery, maybe with event fix plugin, or just get the necessary parts of it
            document.onkeydown = function(e) {
                if (e == null) { // ie
                    keycode = event.keyCode;
                } else { // mozilla
                    keycode = e.which;
                }
                switch(keycode) {
                case 27:
                    TB_remove();
                    break;
                case 190:
                    if( next.html ) {
                        document.onkeydown = null;
                        goNext();
                    }
                    break;
                case 188:
                    if( prev.html ) {
                        document.onkeydown = null;
                        goPrev();
                    }
                    break;
                }
            };

            // TODO don't remove loader etc., just hide and show later
            TB_position();
            $("#TB_load").remove();
            $("#TB_ImageOff").click(TB_remove);

            // for safari using css instead of show
            // TODO is that necessary? can't test safari
            $("#TB_window").css({display:"block"});
        };
        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").append("<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_showIframe()'> </iframe>");
        } else {
            $("#TB_window").append("<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").click(TB_remove);

            if(url.indexOf('TB_inline') != -1){
                $("#TB_ajaxContent").html($('#' + params['inlineId']).html());
                TB_position();
                $("#TB_load").remove();
                $("#TB_window").css({display:"block"});
            }else if(url.indexOf('TB_iframe') != -1){
                TB_position();
                if(frames['TB_iframeContent'] == undefined){//be nice to safari
                    $("#TB_load").remove();
                    $("#TB_window").css({display:"block"});
                    $(document).keyup( function(e){ var key = e.keyCode; if(key == 27){TB_remove();} });
                }
            }else{
                $("#TB_ajaxContent").load(url, function(){
                    TB_position();
                    $("#TB_load").remove();
                    $("#TB_window").css({display:"block"});
                });
            }

    }

    $(window).resize(TB_position);

    document.onkeyup = function(e){
        if (e == null) { // ie
            keycode = event.keyCode;
        } else { // mozilla
            keycode = e.which;
        }
        if(keycode == 27){ // close
            TB_remove();
        }
    };

}

//helper functions below

function TB_showIframe(){
    $("#TB_load").remove();
    $("#TB_window").css({display:"block"});
}

function TB_remove() {
    $("#TB_imageOff").unbind("click");
    $("#TB_overlay").unbind("click");
    $("#TB_closeWindowButton").unbind("click");
    $("#TB_window").fadeOut("fast",function(){$('#TB_window,#TB_overlay,#TB_HideSelect').remove();});
    $("#TB_load").remove();
    return false;
}

function TB_position() {
    var pagesize = TB_getPageSize();
    var arrayPageScroll = TB_getPageScrollTop();
    var style = {width: TB_WIDTH, left: (arrayPageScroll[0] + (pagesize[0] - TB_WIDTH)/2), top: (arrayPageScroll[1] + (pagesize[1]-TB_HEIGHT)/2)};
    $("#TB_window").css(style);
}

function TB_overlaySize(){
    if (window.innerHeight && window.scrollMaxY || window.innerWidth && window.scrollMaxX) {
        yScroll = window.innerHeight + window.scrollMaxY;
        xScroll = window.innerWidth + window.scrollMaxX;
        var deff = document.documentElement;
        var wff = (deff&&deff.clientWidth) || document.body.clientWidth || window.innerWidth || self.innerWidth;
        var hff = (deff&&deff.clientHeight) || document.body.clientHeight || window.innerHeight || self.innerHeight;
        xScroll -= (window.innerWidth - wff);
        yScroll -= (window.innerHeight - hff);
    } else if (document.body.scrollHeight > document.body.offsetHeight || document.body.scrollWidth > document.body.offsetWidth){ // all but Explorer Mac
        yScroll = document.body.scrollHeight;
        xScroll = document.body.scrollWidth;
    } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
        yScroll = document.body.offsetHeight;
        xScroll = document.body.offsetWidth;
    }
    $("#TB_overlay").css({"height": yScroll, "width": xScroll});
    $("#TB_HideSelect").css({"height": yScroll,"width": xScroll});
}

function TB_load_position() {
    var pagesize = TB_getPageSize();
    var arrayPageScroll = TB_getPageScrollTop();
    $("#TB_load")
        .css({left: (arrayPageScroll[0] + (pagesize[0] - 100)/2), top: (arrayPageScroll[1] + ((pagesize[1]-100)/2)) })
        .css({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;
}

function TB_getPageScrollTop(){
    var yScrolltop;
    var xScrollleft;
    if (self.pageYOffset || self.pageXOffset) {
        yScrolltop = self.pageYOffset;
        xScrollleft = self.pageXOffset;
    } else if (document.documentElement && document.documentElement.scrollTop || document.documentElement.scrollLeft ){  // Explorer 6 Strict
        yScrolltop = document.documentElement.scrollTop;
        xScrollleft = document.documentElement.scrollLeft;
    } else if (document.body) {// all other Explorers
        yScrolltop = document.body.scrollTop;
        xScrollleft = document.body.scrollLeft;
    }
    arrayPageScroll = new Array(xScrollleft,yScrolltop);
    return arrayPageScroll;
}

function TB_getPageSize(){
    var de = document.documentElement;
    var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
    var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight;
    arrayPageSize = new Array(w,h);
    return arrayPageSize;
}