//
//  Configuration
//
BellBoxOptions = Object.extend({
    overlayOpacity: 0.8,   // controls transparency of shadow overlay
    animate: true,         // toggles resizing animations
    resizeSpeed: 7,        // controls the speed of the image resizing animations (1=slowest and 10=fastest)
    borderSize: 10,         //if you adjust the padding in the CSS, you will need to update this variable
    width: 800,
    height: 600
}, window.BellBoxOptions || {});

// -----------------------------------------------------------------------------------

var BellBox = Class.create();

BellBox.prototype = {
    initialize: function()
    {
        this.overlayDuration = BellBoxOptions.animate ? 0.2 : 0;  // shadow fade in/out duration

        // When BellBox starts it will resize itself from 250 by 250 to the current image dimension.
        // If animations are turned off, it will be hidden as to prevent a flicker of a
        // white 250 by 250 box.
        var size = (BellBoxOptions.animate ? 250 : 1) + 'px';


        var objBody = $$('body')[0];

        objBody.appendChild(Builder.node('div', { id: 'overlay' }));

        objBody.appendChild(Builder.node('div', { id: 'BellBox' }, [
            Builder.node('div', { id: 'outerContainer' }, [
                Builder.node('iframe', { id: 'bbIFrame', style: 'border:0px solid white;', frameborder: '0', border: 0, width: BellBoxOptions.width, height: BellBoxOptions.height })
            ])
        ]));

        this.BellBox = $('BellBox');
        this.overlay = $('overlay');
        this.outerContainer = $('outerContainer');
        this.iframe = $('bbIFrame');

        $('overlay').hide().observe('click', (function() { this.end(); }).bind(this));
        $('BellBox').hide().observe('click', (function(event) { if (event.element().id == 'BellBox') this.end(); }).bind(this));
        //$('outerContainer').setStyle({ width: size, height: size });
    },

    frameLoaded: function(e)
    {
        this.iframe.show();
        //        Event.observe(window.frames["bbIFrame"].document, 'click', function(event)
        //        {
        //            var target = event.findElement('a[rel^=closebellbox]');
        //            if (target)
        //            {
        //                event.stop();
        //            }
        //        });
    },

    start: function(url, width, height)
    {
        this.iframe.observe("load", (this.frameLoaded).bind(this));
        this.outerContainer.style.width = width + "px";
        this.outerContainer.style.height = height + "px";
        this.iframe.width = width;
        this.iframe.height = height;
        this.iframe.hide();
        this.iframe.src = url;

        $$('select', 'object', 'embed').each(function(node) { node.style.visibility = 'hidden' });

        // stretch overlay to fill page and fade in
        var pageSize = this.getPageSize();
        this.overlay.setStyle({ width: pageSize.width + 'px', height: pageSize.height + 'px' });
        this.overlay.appear({ duration: this.overlayDuration, from: 0.0, to: BellBoxOptions.overlayOpacity });

        // calculate top and left offset for the BellBox 
        //alert(document.viewport.getWidth() + "x" + document.viewport.getHeight());
        var arrayPageScroll = document.viewport.getScrollOffsets();
        var BellBoxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 10);
        var BellBoxLeft = arrayPageScroll[0];

        this.BellBox.setStyle({ top: BellBoxTop + 'px', left: BellBoxLeft + 'px' }).show();
    },

    //
    //  end()
    //
    end: function()
    {

        this.BellBox.hide();
        this.iframe.src = "";
        this.overlay.fade({ duration: this.overlayDuration });
        $$('select', 'object', 'embed').each(function(node) { node.style.visibility = 'visible' });
    },

    //
    //  getPageSize()
    //
    getPageSize: function()
    {

        var xScroll, yScroll;

        if (window.innerHeight && window.scrollMaxY)
        {
            xScroll = window.innerWidth + window.scrollMaxX;
            yScroll = window.innerHeight + window.scrollMaxY;
        } else if (document.body.scrollHeight > document.body.offsetHeight)
        { // all but Explorer Mac
            xScroll = document.body.scrollWidth;
            yScroll = document.body.scrollHeight;
        } else
        { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
            xScroll = document.body.offsetWidth;
            yScroll = document.body.offsetHeight;
        }

        var windowWidth, windowHeight;

        if (self.innerHeight)
        {	// all except Explorer
            if (document.documentElement.clientWidth)
            {
                windowWidth = document.documentElement.clientWidth;
            } else
            {
                windowWidth = self.innerWidth;
            }
            windowHeight = self.innerHeight;
        } else if (document.documentElement && document.documentElement.clientHeight)
        { // Explorer 6 Strict Mode
            windowWidth = document.documentElement.clientWidth;
            windowHeight = document.documentElement.clientHeight;
        } else if (document.body)
        { // other Explorers
            windowWidth = document.body.clientWidth;
            windowHeight = document.body.clientHeight;
        }

        // for small pages with total height less then height of the viewport
        if (yScroll < windowHeight)
        {
            pageHeight = windowHeight;
        } else
        {
            pageHeight = yScroll;
        }

        // for small pages with total width less then width of the viewport
        if (xScroll < windowWidth)
        {
            pageWidth = xScroll;
        } else
        {
            pageWidth = windowWidth;
        }

        return { width: pageWidth, height: pageHeight };
    },

    startLink: function(target)
    {
        var rel = target.rel;
        var start = rel.indexOf("[", 0) + 1;
        var sub = rel.substr(start, rel.length - start - 1);

        var size = sub.split(",");
        if (size.length > 1)
            bellbox.start(target.href, size[0], size[1]);
        else
            bellbox.start(target.href, 640, 480);
    }
}

var bellbox
Event.observe(window, "load", function()
{
    bellbox = new BellBox();
});

document.observe('click', function(event)
{
    var target = event.findElement('a[rel^=bellbox]');
    if (target)
    {
        event.stop();
        bellbox.startLink(target);
    }
});