/*******************************************************************************
 * contentslider.js           1.0               18/October/2009
 *
 * COPYRIGHT.   HSBC MAURITIUS.  ALL RIGHTS RESERVED.
 *
 * This software is only to be used for the purpose for which it has been
 * provided.  No part of it is to be reproduced, disassembled, transmitted,
 * stored in a retrieval system nor translated in any human or computer
 * language in any way or for any other purposes whatsoever without the
 * prior written consent of HSBC Mauritius
 *
 *******************************************************************************/

(function($){
	
    $.contentSlider = function(el, options){
        // To avoid scope issues, use 'base' instead of 'this'
        // to reference this class from internal events and functions.
        var base = this;
        
        // Access to jQuery and DOM versions of element
        base.$el = $(el);
        base.el = el; 

		// Set up a few defaults
        base.currentPage = 1;
		base.timer = null;
		base.playing = false;

        // Add a reverse reference to the DOM object
        base.$el.data("contentSlider", base);
        
        base.init = function(){
            base.options = $.extend({},$.contentSlider.defaults, options);
			
			// Cache existing DOM elements for later 
			base.$wrapper = base.$el.find('> div').css('overflow', 'hidden');
            base.$slider  = base.$wrapper.find('> ul');
            base.$items   = base.$slider.find('> li');
            base.$single  = base.$items.filter(':first');

        	// Get the details
            base.singleWidth = base.$single.outerWidth();
            base.pages = base.$items.length;

            // Top and tail the list with 'visible' number of items, top has the last section, and tail has the first
			// This supports the "infinite" scrolling
			base.$items.filter(':first').before(base.$items.filter(':last').clone().addClass('cloned'));
            base.$items.filter(':last' ).after(base.$items.filter(':first').clone().addClass('cloned'));

			// We just added two items, time to re-cache the list
            base.$items = base.$slider.find('> li'); // reselect
            
			// If autoPlay functionality is included, then initialize the settings
			if(base.options.autoPlay) {
				base.playing = !base.options.startStopped; // Sets the playing variable to false if startStopped is true
				base.buildAutoPlay();
			};
			
			// If pauseOnHover then add hover effects
			if(base.options.pauseOnHover) {
				base.$el.hover(function(){
					base.clearTimer();
				}, function(){
					base.startStop(base.playing);
				});
			}
			
			// If a hash can not be used to trigger the plugin, then go to page 1
			if((base.options.hashTags == true && !base.gotoHash()) || base.options.hashTags == false){
				base.setCurrentPage(1);
			};
        };

		base.gotoPage = function(page, autoplay){
			 // When autoplay isn't passed, we stop the timer
			if(autoplay !== true) autoplay = false;
			if(!autoplay) base.startStop(false);
			
			if(typeof(page) == "undefined" || page == null) {
				page = 1;
				base.setCurrentPage(1);
			};
			
			// Just check for bounds
			if(page > base.pages + 1) page = base.pages;
			if(page < 0 ) page = 1;

			var dir = page < base.currentPage ? -1 : 1,
                n = Math.abs(base.currentPage - page),
                left = base.singleWidth * dir * n;
			
			base.$wrapper.filter(':not(:animated)').animate({
                scrollLeft : '+=' + left
            }, base.options.animationTime, base.options.easing, function () {
                if (page == 0) {
                    base.$wrapper.scrollLeft(base.singleWidth * base.pages);
					page = base.pages;
                } else if (page > base.pages) {
                    base.$wrapper.scrollLeft(base.singleWidth);
                    // reset back to start position
                    page = 1;
                };
				base.setCurrentPage(page);
				
            });
		};
		
		base.setCurrentPage = function(page, move){
			// Set visual
//			if(base.options.buildNavigation){
//				base.$nav.find('.cur').removeClass('cur');
//				$(base.$navLinks[page - 1]).addClass('cur');	
//			};
			
			// Only change left if move does not equal false
			if(move !== false) base.$wrapper.scrollLeft(base.singleWidth * page);

			// Update local variable
			base.currentPage = page;
		};
		
		base.goForward = function(autoplay){
			if(autoplay !== true) autoplay = false;
			base.gotoPage(base.currentPage + 1, autoplay);
		};
		
		// This method tries to find a hash that matches panel-X
		// If found, it tries to find a matching item
		// If that is found as well, then that item starts visible
		base.gotoHash = function(){
			if(/^#?panel-\d+$/.test(window.location.hash)){
				var index = parseInt(window.location.hash.substr(7));
				var $item = base.$items.filter(':eq(' + index + ')');
				if($item.length != 0){
					base.setCurrentPage(index);
					return true;
				};
			};
			return false; // A item wasn't found;
		};
        
		// Creates the Start/Stop button
		base.buildAutoPlay = function(){

			base.$startStop = $("<a href='#' id='start-stop'></a>").html(base.playing ? base.options.stopText :  base.options.startText);

			// Use the same setting, but trigger the start;
			base.startStop(base.playing);
		};
		
		// Handles stopping and playing the slideshow
		// Pass startStop(false) to stop and startStop(true) to play
		
		base.startStop = function(playing){
			if(playing !== true) playing = false; // Default if not supplied is false
			
			// Update variable
			base.playing = playing;
			
			// Toggle playing and text
			if(base.options.autoPlay) base.$startStop.toggleClass("playing", playing).html( playing ? base.options.stopText : base.options.startText );
			
			if(playing){
				base.clearTimer(); // Just in case this was triggered twice in a row
				base.timer = window.setInterval(function(){
					base.goForward(true);
				}, base.options.delay);
			} else {
				base.clearTimer();
			};
		};

		base.clearTimer = function(){
			// Clear the timer only if it is set
			if(base.timer) window.clearInterval(base.timer);
		};
		
		// Trigger the initialization
        base.init();
    };

	
    $.fn.contentSlider = function(options){
		if(typeof(options) == "object"){
		    return this.each(function(i){			
				(new $.contentSlider(this, options));
	        });	
		} else if (typeof(options) == "number") {

			return this.each(function(i){
				var anySlide = $(this).data('contentSlider');
				if(anySlide){
					anySlide.gotoPage(options);
				}
			});
		}
    };


})
(jQuery);