$(document).ready(function(){
  var currentPosition = 0;
  var slideWidth = 685;
  var slides = $('.slide');
  var numberOfSlides = slides.length;
  var duration = 5000;

  // 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')
    .append('<span class="control" id="leftControl"><u>Mover para direita</u></span><span class="atual">' + (currentPosition+1) + '/' + numberOfSlides + '</span><span class="control" id="rightControl"><u>Mover para esquerda</u></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;
    // Index Update
	$('.atual').text((currentPosition+1) + '/' + numberOfSlides);
	// Hide / show controls
    manageControls(currentPosition);
    // Move slideInner using margin-left
    if((currentPosition+1) <= numberOfSlides) $('#slideInner').animate({'marginLeft':slideWidth*(-currentPosition)});
  });
  
  // Cria o evento com o tempo
  function proximoSlide(){
	  window.setTimeout(function() {
		  $("#rightControl").click();
		  if((currentPosition+1) <= numberOfSlides) 
			  proximoSlide();
		  else {
			  currentPosition = 0;
			  manageControls(currentPosition);
			  $('.atual').text((currentPosition+1) + '/' + numberOfSlides);
			  $('#slideInner').animate({'marginLeft':0});
			  proximoSlide();
		  }
	  },duration);
  }
  
  proximoSlide();
  
  // 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){ $('#rightControl').hide() } else{ $('#rightControl').show() }
  }	
});