/*
 * Reworked from slider found at
 * http://www.sohtanaka.com/web-design/automatic-image-slider-w-css-jquery/
 */

var AutoRotator = {

  imageWidth : 0,
  imageSum : 0,
  imageReelWidth : 0,
  
  init : function() {
  	//Set Default State of each portfolio piece
  	$(".paging").show();
  	$(".paging a:first").addClass("active");
  		
  	//Get size of images, how many there are, then determin the size of the image reel.
  	AutoRotator.imageWidth = $(".window").width();
  	AutoRotator.imageSum = $(".image_reel img").size();
  	AutoRotator.imageReelWidth = AutoRotator.imageWidth * AutoRotator.imageSum;
  	
  	//Adjust the image reel to its new size
  	$(".image_reel").css({'width' : AutoRotator.imageReelWidth});
  
    this.rotateSwitch(); //Run function on launch
  	
  	//On Hover
  	$(".image_reel a").hover(function() {
  		clearInterval(play); //Stop the rotation
  	}, function() {
  		AutoRotator.rotateSwitch();      //Resume rotation
  	});	
  	
  	//On Click
  	$(".paging a").click(function() {	
  		$active = $(this);   //Activate the clicked paging
  		//Reset Timer
  		clearInterval(play); //Stop the rotation
  		AutoRotator.rotate();            //Trigger rotation immediately
  		AutoRotator.rotateSwitch();      // Resume rotation
  		return false;        //Prevent browser jump to link anchor
  	});
  },
  
  // Paging & Slider
	rotate : function() {
    var triggerID = $active.attr("rel") - 1;                     //Get number of times to slide
		var image_reelPosition = triggerID * AutoRotator.imageWidth; //Determines the distance the image reel needs to slide

		$(".paging a").removeClass('active'); //Remove all active class
		$active.addClass('active');           //Add active class (the $active is declared in the rotateSwitch function)
		
		//Slider animation
		$(".image_reel").animate({ 
			left: -image_reelPosition
		}, 500 );

	},
	
	// Rotation & Timing Event
	rotateSwitch : function() {
		play = setInterval(function(){ //Set timer - this will repeat itself every 3 seconds
			$active = $('.paging a.active').next();
			if ( $active.length === 0) { //If paging reaches the end...
				$active = $('.paging a:first'); //go back to first
			}
			AutoRotator.rotate(); //Trigger the paging and slider function
		}, 7000); //Timer speed in milliseconds

  }
};