/*
    This file is part of JonDesign's SmoothSlideshow v2.0.

    JonDesign's SmoothSlideshow is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    JonDesign's SmoothSlideshow is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Foobar; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Main Developer: Jonathan Schemoul (JonDesign: http://www.jondesign.net/)
    Contributed code by:
    - Christian Ehret (bugfix)
    - Simon Willison (addLoadEvent)
*/

// declaring the class
var timedSlideShow = Class.create();

// implementing the class
timedSlideShow.prototype = {
    initialize: function(element, data) {
	this.currentIter = 0;
	this.lastIter = 0;
	this.maxIter = 0;
	this.slideShowElement = element;
	this.slideShowData = data;
	this.slideShowInit = 1;
	this.slideElements = Array();
	this.slideShowDelay = 8000;
	this.articleLink = "";
	this.slideInfoZone = "";
	
	element.style.display="block";

	this.articleLink = document.createElement('a');
	this.articleLink.className = 'global';
	element.appendChild(this.articleLink);
	// removed linking of slideshow - MJ
	//this.articleLink.href = "";
	
	this.maxIter = data.length;
	for(i=0;i<data.length;i++)
	{
	    var currentImg = document.createElement('div');
	    currentImg.className = "slideElement";
	    currentImg.style.position="absolute";
	    currentImg.style.left="0px";
	    currentImg.style.top="0px";
	    currentImg.style.margin="0px";
	    currentImg.style.border="0px";
	    currentImg.style.backgroundImage="url('" + data[i][0] + "')";
	    currentImg.style.backgroundPosition="center center";
	    
	    this.articleLink.appendChild(currentImg);
	    currentImg.currentOpacity = new fx.Opacity(currentImg, {duration: 2000});
	    currentImg.setStyle('opacity',0);
	    this.slideElements[parseInt(i)] = currentImg;
	}
	
	this.loadingElement = document.createElement('div');
	this.loadingElement.className = 'loadingElement';
	this.articleLink.appendChild(this.loadingElement);
	
	this.slideInfoZone = document.createElement('div');
	this.slideInfoZone.className = 'slideInfoZone';
	this.articleLink.appendChild(this.slideInfoZone);
	this.slideInfoZone.style.opacity = 0;
	
	this.doSlideShow();
    },
    destroySlideShow: function(element) {
	var myClassName = element.className;
	var newElement = document.createElement('div');
	newElement.className = myClassName;
	element.parentNode.replaceChild(newElement, element);
    },
    startSlideShow: function() {
	this.loadingElement.style.display = "none";
	this.lastIter = this.maxIter - 1;
	this.currentIter = 0;
	this.slideShowInit = 0;
	this.slideElements[parseInt(this.currentIter)].setStyle('opacity', 1);
	setTimeout(this.showInfoSlideShow.bind(this),1000);
	setTimeout(this.hideInfoSlideShow.bind(this),this.slideShowDelay-1000);
	setTimeout(this.nextSlideShow.bind(this),this.slideShowDelay);
    },
    nextSlideShow: function() {
	this.lastIter = this.currentIter;
	this.currentIter++;
	if (this.currentIter >= this.maxIter)
	{
	    this.currentIter = 0;
	    this.lastIter = this.maxIter - 1;
	}
	this.slideShowInit = 0;
	this.doSlideShow.bind(this)();
    },
    doSlideShow: function() {
	if (this.slideShowInit == 1)
	{
	    imgPreloader = new Image();
	    // once image is preloaded, start slideshow
	    imgPreloader.onload=function(){
		setTimeout(this.startSlideShow.bind(this),10);
	    }.bind(this);
	    imgPreloader.src = this.slideShowData[0][0];
	} else {
	    if (this.currentIter != 0) {
		this.slideElements[parseInt(this.currentIter)].currentOpacity.options.onComplete = function() {
		    this.slideElements[parseInt(this.lastIter)].setStyle('opacity',0);
		}.bind(this);
		this.slideElements[parseInt(this.currentIter)].currentOpacity.custom(0, 1);
	    } else {
		this.slideElements[parseInt(this.currentIter)].setStyle('opacity',1);
		this.slideElements[parseInt(this.lastIter)].currentOpacity.custom(1, 0);
	    }
	    
	    setTimeout(this.showInfoSlideShow.bind(this),1000);
	    // test added by MJ
	    if(this.slideShowData[this.currentIter][2] != '') {
		setTimeout(this.hideInfoSlideShow.bind(this),this.slideShowDelay-1000);
	    }
	    setTimeout(this.nextSlideShow.bind(this),this.slideShowDelay);
	}
    },
    showInfoSlideShow: function() {
	if(this.slideShowData[this.currentIter][2] != '') { //morten la paa denne testen
	    //this.articleLink.removeChild(this.slideInfoZone);
	    this.slideInfoZone = document.createElement('div');
	    this.slideInfoZone.styles = new fx.Styles(this.slideInfoZone);
	    this.slideInfoZone.setStyle('opacity',0);
	    var slideInfoZoneTitle = document.createElement('h2');
	    slideInfoZoneTitle.innerHTML = this.slideShowData[this.currentIter][2]
	    this.slideInfoZone.appendChild(slideInfoZoneTitle);
	    var slideInfoZoneDescription = document.createElement('p');
	    slideInfoZoneDescription.innerHTML = this.slideShowData[this.currentIter][3];
	    this.slideInfoZone.appendChild(slideInfoZoneDescription);
	    this.articleLink.appendChild(this.slideInfoZone);
	    //this.articleLink.href = this.slideShowData[this.currentIter][1];
	    this.slideInfoZone.className = 'slideInfoZone';
	    this.slideInfoZone.normalHeight = this.slideInfoZone.getStyle('height', true).toInt();
	    this.slideInfoZone.styles.custom({'opacity': [0, 0.7], 'height': [0, this.slideInfoZone.normalHeight]});
	}
    },
    hideInfoSlideShow: function() {
	this.slideInfoZone.styles.custom({'opacity': [0.7, 0]});
    }
};

function initTimedSlideShow(element, data) {
    var slideshow = new timedSlideShow(element, data);
}

function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
	window.onload = func;
    } else {
	window.onload = function() {
	    oldonload();
	    func();
	}
    }
}