/*
    Totem Ticker Plugin
    Copyright (c) 2011 Zach Dunn / www.buildinternet.com
    Released under MIT License
    --------------------------
    Structure based on Doug Neiner's jQuery plugin blueprint: http://starter.pixelgraphics.us/
*/
(function( $ ){
    
  if(!$.omr){
    $.omr = new Object();
  };

  $.omr.totemticker = function(el, options) {
    var base = this;
          
    //Define the DOM elements
    base.el = el;
    base.$el = $(el);
          
    // Add a reverse reference to the DOM object
    base.$el.data("omr.totemticker", base);
          
    base.init = function(){
      base.options = $.extend({},$.omr.totemticker.defaultOptions, options);
            
      //Define the ticker object
      base.ticker;
            
      //Adjust the height of ticker if specified
      base.format_ticker();
            
      //Setup navigation links (if specified)
      base.setup_nav();
            
      //Start the ticker
      base.start_interval();
            
      //Debugging info in console
      //base.debug_info();
    };
        
    base.start_interval = function(){
            
      //Clear out any existing interval
      clearInterval(base.ticker);
            
      if (base.options.direction == 'up') {
          //If the direction has been set to up
          base.ticker = setInterval(function() {
              base.$el.find('li:last').detach().prependTo(base.$el).css('marginTop', '-' + base.options.row_height);
              base.$el.find('li:first').animate({
                  marginTop: '0px'
              }, base.options.speed, function () {
                  //Callback functions go here
              });
          }, base.options.interval);
      }else{
          //Otherwise, run the default of down
          base.ticker = setInterval(function() {
                
          base.$el.find('li:first').animate({
            marginTop: '-' + base.options.row_height
          }, base.options.speed, function() {
              $(this).detach().css('marginTop', '0').appendTo(base.$el);
          });
                    
          }, base.options.interval);
      }
    }
        


    base.reset_interval = function(){
        clearInterval(base.ticker);
        base.start_interval();
    }
        
        base.stop_interval = function(){
            clearInterval(base.ticker);
        }
    
        base.format_ticker = function(){
        
            if(typeof(base.options.max_items) != "undefined" && base.options.max_items != null) {
                
                //Remove units of measurement (Should expand to cover EM and % later)
                var stripped_height = base.options.row_height.replace(/px/i, '');
                var ticker_height = stripped_height * base.options.max_items;
            
                base.$el.css({
                    height        : ticker_height + 'px', 
                    overflow    : 'hidden'    
                });
                
            }else{
                //No heights were specified, so just doublecheck overflow = hidden
                base.$el.css({
                    overflow    : 'hidden'
                })
            }
            
        }
    
        base.setup_nav = function(){
            
            //Stop Button
            if (typeof(base.options.stop) != "undefined"  && base.options.stop != null){
                $(base.options.stop).click(function(){
                    base.stop_interval();
                    return false;
                });
            }
            
            //Start Button
            if (typeof(base.options.start) != "undefined"  && base.options.start != null){
                $(base.options.start).click(function(){
                    base.start_interval();
                    return false;
                });
            }
            
            //Previous Button
            if (typeof(base.options.previous) != "undefined"  && base.options.previous != null){
                $(base.options.previous).click(function(){
                    base.$el.find('li:last').detach().prependTo(base.$el).css('marginTop', '-' + base.options.row_height);
                    base.$el.find('li:first').animate({
                        marginTop: '0px'
                    }, base.options.speed, function () {
                        base.reset_interval();
                    });
                    return false;
                });
            }
            
            //Next Button
            if (typeof(base.options.next) != "undefined" && base.options.next != null){
                $(base.options.next).click(function(){
                    base.$el.find('li:first').animate({
                        marginTop: '-' + base.options.row_height
                    }, base.options.speed, function() {
                        $(this).detach().css('marginTop', '0px').appendTo(base.$el);
                        base.reset_interval();
                    });
                    return false;
                });
            }
            
            //Stop on mouse hover
            if (typeof(base.options.mousestop) != "undefined" && base.options.mousestop === true) {
                base.$el.mouseenter(function(){
                    base.stop_interval();
                }).mouseleave(function(){
                    base.start_interval();
                });
            }
            
            /*
                TO DO List
                ----------------
                Add a continuous scrolling mode
            */
            
        }
        
        base.debug_info = function()
        {
            //Dump options into console
            console.log(base.options);
        }
        
        //Make it go!
        base.init();
  };
  
  $.omr.totemticker.defaultOptions = {
        message     :    'Ticker Loaded',    /* Disregard */
        next        :    null,        /* ID of next button or link */
        previous    :    null,        /* ID of previous button or link */
        stop        :    null,        /* ID of stop button or link */
        start       :    null,        /* ID of start button or link */
        row_height  :    '100px',    /* Height of each ticker row in PX. Should be uniform. */
        speed       :    800,        /* Speed of transition animation in milliseconds */
        interval    :    4000,        /* Time between change in milliseconds */
        max_items   :     null,         /* Integer for how many items to display at once. Resizes height accordingly (OPTIONAL) */
        mousestop   :    false,        /* If set to true, the ticker will stop on mouseover */
        direction   :    'down'        /* Direction that list will scroll */        
  };
  
  $.fn.totemticker = function( options ){
    return this.each(function(){
      (new $.omr.totemticker(this, options));
    });
  };
  
})( jQuery );