// JavaScript Document

$(document).ready(function(){
  var currentPosition = 0;
  var slideWidth = 950;
  var slides = $('.slide');
  var numberOfSlides = slides.length;
  var wrap = true;

  // 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 left and right arrow controls in the DOM
  $('#slideshow')
    .prepend('<span class="control" id="leftControl">Move left</span>')
    .append('<span class="control" id="rightControl">Move right</span>');

  // 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);
      // Move slideInner using margin-left
      $('#slideInner').animate({
        'marginLeft' : (slideWidth)*(-currentPosition),
      }, 200);
    });

  // 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
    if(position==numberOfSlides-1 && wrap == false){ 
		$('#rightControl').hide() 
	} else{ 
		$('#rightControl').show() 
	}
    
	
	if(position == numberOfSlides && wrap == true){
		  currentPosition = 0;
		 $('#leftControl').hide();
	}
	}
  });