var manageControls;
var animate;

$(document).ready(function(){
	var currentPosition = 0;
	var slideWidth = 750;
	var slides = $('.slide');
	var numberOfSlides = slides.length;
	
	// manageControls: Hides and Shows controls depending on currentPosition
	manageControls = function(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
		if(position==numberOfSlides-1){ $('#rightControl').hide() } else{ $('#rightControl').show() }
	}	
	
	animate = function(position){
		// Move slideInner using margin-left
		$('#slideInner').animate({'marginLeft' : slideWidth*(-position)});
	}
	
	// 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' : slideWidth});
	
	// Set #slideInner width equal to total width of all slides
	$('#slideInner').css('width', slideWidth * numberOfSlides);
	
	// Insert controls in the DOM
	
	$('#slideshow')
	.prepend('<div class="control" id="leftControl">Clicking moves left</div>')
	.append('<div class="control" id="rightControl">Clicking moves right</div>');
	
	// Hide left arrow control on first load
	manageControls(currentPosition); 
	
	// Create event listeners for .controls clicks
	$('.control').bind('click', function(){
		// Determine new position
		currentPosition = ($(this).attr('id')=='rightControl') ? currentPosition+1 : currentPosition-1;
		
		// Hide / show controls
		manageControls(currentPosition);
		animate(currentPosition);
		// Move slideInner using margin-left
		//$('#slideInner').animate({'marginLeft' : slideWidth*(-currentPosition)});
	});
	
	
});