/******************************************************************/
/*                        MOOdalBox 1.2.1                         */
/* A modal box (inline popup), used to display remote content     */
/* loaded using AJAX, written for the mootools framework          */
/*         by Razvan Brates, razvan [at] e-magine.ro              */
/******************************************************************/
/*               http://www.e-magine.ro/moodalbox                 */
/******************************************************************/
/*                                                                */
/* MIT style license:                                             */
/* http://en.wikipedia.org/wiki/MIT_License                       */
/*                                                                */
/* mootools found at:                                             */
/* http://mootools.net/                                           */
/*                                                                */
/* Original code based on "Slimbox", by Christophe Beyls:         */
/* http://www.digitalia.be/software/slimbox                       */
/******************************************************************/

// Constants defined here can be changed for easy config / translation
// (defined as vars, because of MSIE's lack of support for const)

var _ERROR_MESSAGE = "Oops.. there was a problem with your request.<br /><br />" +
					"Please try again.<br /><br />" +
					"<em>Click anywhere to close.</em>"; // the error message displayed when the request has a problem
var _RESIZE_DURATION = 400; 		// Duration of height and width resizing (ms)
var _INITIAL_WIDTH = 1000; 	// Initial width of the box (px)
var _INITIAL_HEIGHT = 250; 	// Initial height of the box (px)
var _CONTENTS_WIDTH = 1000; 	// Actual width of the box (px)
var _CONTENTS_HEIGHT = 400; 	// Actual height of the box (px)
var _DEF_CONTENTS_WIDTH = 1000; 	// Default width of the box (px) - used for resetting when a different setting was used
var _DEF_CONTENTS_HEIGHT = 400; 	// Default height of the box (px) - used for resetting when a different setting was used
var _ANIMATE_CAPTION = true; 	// Enable/Disable caption animation
var _EVAL_SCRIPTS = false; // Option to evaluate scripts in the response text
var _EVAL_RESPONSE = false; // Option to evaluate the whole response text

// The MOOdalBox object in its beauty

var MOOdalBox = {

    // init the MOOdalBox
    init: function(options) {

        // init default options
        this.options = Object.extend({
            resizeDuration: _RESIZE_DURATION,
            initialWidth: _INITIAL_WIDTH,
            initialHeight: _INITIAL_HEIGHT,
            contentsWidth: _CONTENTS_WIDTH,
            contentsHeight: _CONTENTS_HEIGHT,
            defContentsWidth: _DEF_CONTENTS_WIDTH,
            defContentsHeight: _DEF_CONTENTS_HEIGHT,
            animateCaption: _ANIMATE_CAPTION,
            evalScripts: _EVAL_SCRIPTS,
            evalResponse: _EVAL_RESPONSE
        }, options || {});

        // scan anchors for those opening a MOOdalBox
        this.anchors = [];
        $A($$('a')).each(function(el) {
            // we use a regexp to check for links that 
            // have a rel attribute starting with "moodalbox"
            if (el.rel && el.href && el.rel.test('^moodalbox', 'i')) {
                el.onclick = this.click.pass(el, this);
                this.anchors.push(el);
            }
        }, this);

        // add event listeners
        this.eventKeyDown = this.keyboardListener.bindWithEvent(this);
        this.eventPosition = this.position.bind(this);

        // init the HTML elements
        // the overlay (clickable to close)
        this.overlay = new Element('div').setProperty('id', 'mb_overlay').injectInside(document.body);
        // the center element
        this.center = new Element('div').setProperty('id', 'mb_center').setStyles({ width: this.options.initialWidth + 'px', height: this.options.initialHeight + 'px', marginLeft: '-' + (this.options.initialWidth / 2) + 'px', display: 'none' }).injectInside(document.body);
        // the actual page contents
        this.contents = new Element('div').setProperty('id', 'mb_contents').injectInside(this.center);

        // the bottom part (caption / close)
        this.bottom = new Element('div').setProperty('id', 'mb_bottom').setStyle('display', 'none').injectInside(document.body);
        this.closelink = new Element('a').setProperties({ id: 'mb_close_link', href: '#' }).injectInside(this.bottom);
        this.caption = new Element('div').setProperty('id', 'mb_caption').injectInside(this.bottom);
        new Element('div').setStyle('clear', 'both').injectInside(this.bottom);

        this.error = new Element('div').setProperty('id', 'mb_error').setHTML(_ERROR_MESSAGE);

        // attach the close event to the close button / the overlay
        this.closelink.onclick = this.overlay.onclick = this.close.bind(this);

        // init the effects
        var nextEffect = this.nextEffect.bind(this);
        this.fx = {
            overlay: this.overlay.effect('opacity', { duration: 500 }).hide(),
            resize: this.center.effects({ duration: this.options.resizeDuration, onComplete: nextEffect }),
            contents: this.contents.effect('opacity', { duration: 500, onComplete: nextEffect }),
            bottom: this.bottom.effects({ duration: 400, onComplete: nextEffect })
        };

        this.ajaxRequest = Class.empty;

    },

    click: function(link) {
        return this.open(link.href, link.title, link.rel);
    },

    open: function(sLinkHref, sLinkTitle, sLinkRel) {
        this.href = sLinkHref;
        this.title = sLinkTitle;
        this.rel = sLinkRel;
        this.position();
        this.setup(true);
        this.top = Window.getScrollTop() + (Window.getHeight() / 15);
        this.center.setStyles({ top: this.top + 'px', display: '' });
        this.fx.overlay.custom(0.8);
        return this.loadContents(sLinkHref);
    },

    position: function() {
        this.overlay.setStyles({ top: Window.getScrollTop() + 'px', height: screen.height + 'px' });
    },

    setup: function(open) {
        var elements = $A($$('object'));
        elements.extend($$(window.ActiveXObject ? 'select' : 'embed'));
        elements.each(function(el) { el.style.visibility = open ? 'hidden' : ''; });
        var fn = open ? 'addEvent' : 'removeEvent';
        window[fn]('scroll', this.eventPosition)[fn]('resize', this.eventPosition);
        document[fn]('keydown', this.eventKeyDown);
        this.step = 0;
    },

    loadContents: function() {
        if (this.step) return false;
        this.step = 1;

        // check to see if there are specified dimensions
        // if not, fall back to default values
        var aDim = this.rel.match(/[0-9]+/g);
        this.options.contentsWidth = (aDim && (aDim[0] > 0)) ? aDim[0] : this.options.defContentsWidth;
        this.options.contentsHeight = (aDim && (aDim[1] > 0)) ? aDim[1] : this.options.defContentsHeight;

        this.bottom.setStyles({ opacity: '0', height: '0px', display: 'none' });
        this.center.className = 'mb_loading';

        this.fx.contents.hide();

        // AJAX call here
        var nextEffect = this.nextEffect.bind(this);
        var ajaxFailure = this.ajaxFailure.bind(this);
        var ajaxOptions = {
            method: 'get',
            update: this.contents,
            evalScripts: this.options.evalScripts,
            evalResponse: this.options.evalResponse,
            onComplete: nextEffect,
            onFailure: ajaxFailure
        };
        this.ajaxRequest = new Ajax(this.href, ajaxOptions).request();

        return false;
    },

    ajaxFailure: function() {
        this.contents.setHTML('');
        this.error.clone().injectInside(this.contents);
        this.nextEffect();
        this.center.setStyle('cursor', 'pointer');
        this.bottom.setStyle('cursor', 'pointer');
        this.center.onclick = this.bottom.onclick = this.close.bind(this);
    },

    nextEffect: function() {
        switch (this.step++) {
            case 1:
                // remove previous styling from the elements 
                // (e.g. styling applied in case of an error)
                this.center.className = '';
                this.center.setStyle('cursor', 'default');
                this.bottom.setStyle('cursor', 'default');
                this.center.onclick = this.bottom.onclick = '';
                this.caption.setHTML(this.title);

                this.contents.setStyles({ width: this.options.contentsWidth + "px", height: this.options.contentsHeight + "px" });

                if (this.center.clientHeight != this.contents.offsetHeight) {
                    this.fx.resize.custom({ height: [this.center.clientHeight, this.contents.offsetHeight] });
                    break;
                }
                this.step++;

            case 2:
                if (this.center.clientWidth != this.contents.offsetWidth) {
                    this.fx.resize.custom({ width: [this.center.clientWidth, this.contents.offsetWidth], marginLeft: [-this.center.clientWidth / 2, -this.contents.offsetWidth / 2] });
                    break;
                }
                this.step++;

            case 3:
                this.bottom.setStyles({ top: (this.top + this.center.clientHeight) + 'px', width: this.contents.style.width, marginLeft: this.center.style.marginLeft, display: '' });
                this.fx.contents.custom(0, 1);
                break;

            case 4:
                if (this.options.animateCaption) {
                    this.fx.bottom.custom({ opacity: [0, 1], height: [0, this.bottom.scrollHeight] });
                    break;
                }
                this.bottom.setStyles({ opacity: '1', height: this.bottom.scrollHeight + 'px' });

            case 5:
                this.step = 0;
        }
    },


    keyboardListener: function(event) {
        // close the MOOdalBox when the user presses CTRL + W, CTRL + X, ESC
        if ((event.control && event.key == 'w') || (event.control && event.key == 'x') || (event.key == 'esc')) {
            this.close();
            event.stop();
        }
    },

    close: function() {
        if (this.step < 0) return;
        this.step = -1;
        for (var f in this.fx) this.fx[f].clearTimer();
        this.center.style.display = this.bottom.style.display = 'none';
        this.center.className = 'mb_loading';
        this.fx.overlay.chain(this.setup.pass(false, this)).custom(0);
        return false;
    }

};

// startup
Window.onDomReady(MOOdalBox.init.bind(MOOdalBox));