// Attributions:
//   1) original code from SixRevisions article:   http://sixrevisions.com/tutorials/javascript_tutorial/create-a-slick-and-accessible-slideshow-using-jquery/
//   2) enhancements from Stephane Lyver: http://www.kerpix.com
//   3) translated enhancements and tweaks from Philippe Monnet: http://blog.monnet-usa.com/?p=276
// Revision: March 17, 2010

// Enhancements
var slideshow_start_mode = false;
var autostart_slideshow = true;
var rewind_slideshow = true;
var display_slideshow_control_panel = false;

var slide_transition_time = 1000;
var slide_viewing_time = 10000;

var slide_width = 860;
var interval;

var slideshow_control_icons = new Array();
// Note: you can download the .png locally and edit the urls below to reflect your path
slideshow_control_icons['play'] = 'http://upload.wikimedia.org/wikipedia/commons/2/20/Control_play.png';
slideshow_control_icons['pause'] = 'http://upload.wikimedia.org/wikipedia/commons/0/09/Control_pause.png';

// Enhancements
function start_slideshow() {
	slideshow_start_mode = true;
	interval = setInterval(show_next_slide, slide_viewing_time);
}

function show_next_slide() {
	$('#rightControl').click();
}

function pause_slideshow() {
	slideshow_start_mode = false;
	clearInterval(interval);
}

function handle_control_panel_click() {
	if (slideshow_start_mode == true) {
		$(this).attr('src', slideshow_control_icons['play']);
		pause_slideshow();
	}
	else {
		$(this).attr('src', slideshow_control_icons['pause']);
		start_slideshow();
	}
}

function setup_control_panel() {
	$('#slidesContainer').prepend('<img id="slideshow_control_panel" src="" alt="Navigation diaporama" />');
	var control_panel = $('#slideshow_control_panel');

	if (autostart_slideshow == true)
		control_panel.attr('src', slideshow_control_icons['pause']);
	else
		control_panel.attr('src', slideshow_control_icons['play']);

	control_panel.bind('click', handle_control_panel_click);
}

$(document).ready(function() {
	var currentPosition = 0;

	var slides = $('.slide');
	var numberOfSlides = slides.length;


	// Remove scrollbar in JS
	$('#slidesContainer').css('overflow', 'hidden');

	// Wrap all .slides with #slideInner div
	slides
    .wrapAll('<div id="slideInner"></div>')
	// Float left to display horizontally, readjust .slides width
	.css({
		'float': 'left',
		'width': slide_width
	});

	// Set #slideInner width equal to total width of all slides
	$('#slideInner').css('width', slide_width * numberOfSlides);

	//	// Insert controls in the DOM
	//	$('#slideshow')
	//    .prepend('<span class="control" id="leftControl">Vorige</span>')
	//    .append('<span class="control" id="rightControl">Volgende</span>');

	// Hide left arrow control on first load
	manageControls(currentPosition, numberOfSlides);

	// Conditionally setup the control panel if needed
	if (display_slideshow_control_panel == true)
		setup_control_panel();

	// Create event listeners for .controls clicks
	$('.control')
    .bind('click', function() {
    	clearInterval(interval);
    	interval = setInterval(show_next_slide, slide_viewing_time);

    	// Determine new position
    	currentPosition = ($(this).attr('id') == 'rightControl') ? currentPosition + 1 : currentPosition - 1;

    	// If auto rewind is off pause the slideshow 
    	// when on the last slide
    	if (currentPosition == numberOfSlides && rewind_slideshow == false) {
    		currentPosition--;
    		pause_slideshow();
    	}

    	if (currentPosition == -1 && rewind_slideshow == false) {
    		currentPosition == numberOfSlides - 1;
    		pause_slideshow();
    	}

    	// Hide / show controls
    	manageControls(currentPosition);

    	// Move slideInner using margin-left
    	$('#slideInner').animate({
    		'marginLeft': slide_width * (-currentPosition)
    	}, slide_transition_time);

    	return false;
    });

	// If auto start is on kick off the slideshow
	if (autostart_slideshow == true) {
		start_slideshow();
	}

	// manageControls: Hides and Shows controls depending on currentPosition
	function manageControls(position) {
		// Hide left arrow if position is first slide
		//if (position == 0) { $('#leftControl').hide() } else { $('#leftControl').show() }

		// Hide right arrow if position is last slide
		// and if auto rewind is not on
		//if (position == numberOfSlides - 1 && rewind_slideshow == false) {
		//	$('#rightControl').hide();
		//} else {
		//	$('#rightControl').show();
		//}

		// Go back to the first slide if we're on the last slide
		// and if auto rewind is on
		if (position == numberOfSlides && rewind_slideshow == true) {
			currentPosition = 0;
			//$('#leftControl').hide();
		}

		if (position == -1 && rewind_slideshow == true) {
			currentPosition = numberOfSlides - 1;
		}
	}

});