/**
 * Pris sur : http://sixrevisions.com/tutorials/javascript_tutorial/create-a-slick-and-accessible-slideshow-using-jquery/
 * Ajusté pour avoir un nombre X de slider dans la même page.
 */

function initSlider(sliderNo) {
  var currentPosition = 0;
  var slideWidth = 600;
  var slides = $('div[id="slide'+sliderNo+'"]');
  var numberOfSlides = slides.length;
  
  // Remove scrollbar in JS
  $('#slidesContainer'+sliderNo).css('overflow', 'hidden');

  // Wrap all .slides with #slideInner div
  slides
  .wrapAll('<div id="slideInner'+sliderNo+'"></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'+sliderNo).css('width', slideWidth * numberOfSlides);

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

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

  // Create event listeners for .controls clicks
  $('#leftControl'+sliderNo)
    .bind('click', function(){
    // Determine new position
      currentPosition = currentPosition-1;

      // Hide / show controls
      manageControls(currentPosition);
      // Move slideInner using margin-left
      $('#slideInner'+sliderNo).animate({
        'marginLeft' : slideWidth*(-currentPosition)
      });
    });
  
  $('#rightControl'+sliderNo)
  	.bind('click', function(){
	  // Determine new position
	    currentPosition = currentPosition+1;
	
	    // Hide / show controls
	    manageControls(currentPosition);
	    // Move slideInner using margin-left
	    $('#slideInner'+sliderNo).animate({
	      'marginLeft' : slideWidth*(-currentPosition)
	    });
	  });

  // manageControls: Hides and shows controls depending on currentPosition
  function manageControls(position){
    // Hide left arrow if position is first slide
    if(position==0){ $('#leftControl'+sliderNo).hide() }
    else{ $('#leftControl'+sliderNo).show() }
    // Hide right arrow if position is last slide
    if(position==numberOfSlides-1){ $('#rightControl'+sliderNo).hide() }
    else{ $('#rightControl'+sliderNo).show() }
  }
}