/*******************************************************************************
TITLE: 			Character Count Plugin
	
AUTHORS:		Shaun Crittenden (original code) & Nathan Koch (plugin-ization)
	
VERSION:		1.0
	
REQUIRES:		jQuery v1.3.2
	
EXPECTS:		
	
OPTIONS:		
					
CALLBACKS: 		
					
DESCRIPTION:	
	
*******************************************************************************/

(function($) {
    $.fn.extend({
        characterCount: function(options) {
            // DEFAULTS
            var defaults = {
                charLimit: 700,
                charLimitClass: "word-count",
                charLimitText: "(%LIMIT% characters remaining)",
                charExceededText: ("(character limit exceeded by %OVER% )"),
                errorClass: "exceeded-limit"
            };
            var options = $.extend(defaults, options);
            return this.each(function() {

                // VARIABLES
                var current = $(this).val().length;
                var remaining;
                var over;

                $this = $(this);
                $counter = $('<p class="%CLASS%" />'.replace("%CLASS%", options.charLimitClass))
								.insertAfter($this)
								.text(options.charLimitText.replace("%LIMIT%", options.charLimit - current));

                // FUNCTIONS
                updateCharacterLimit = function(remainingNum) {
                    $counter.removeClass(options.errorClass);
                    $counter.text(options.charLimitText.replace("%LIMIT%", remainingNum));
                };

                updateLimitExceeded = function(overNum) {
                    $counter.addClass(options.errorClass);
                    $counter.text(options.charExceededText.replace("%OVER%", overNum));
                };

                // EVENT LISTENERS
                $this.keyup(function(event) {
                    current = $(this).val().length;
                    remaining = options.charLimit - current;

                    if (remaining >= 0) {
                        updateCharacterLimit(remaining);
                    } else {
                        over = current - options.charLimit;
                        updateLimitExceeded(over);
                    }
                });
            });
        }
    });
})(jQuery);