/*! jQuery.counter.js (jQuery Character and Word Counter plugin)
 v2.0 (c) Wilkins Fernandez
 MIT License
 */
(function($) {
	$.fn.extend({
		counter : function(options) {
			var defaults = {
				type	: 'char',      		// {char || word}
				count	: 'down',        	// count {up || down} from or to the goal number
				goal	: 60,        		// count {to || from} this number
				text	: true,				// Show description of counter
				msg		: ''
			}, $countObj = '', countIndex = '',
			// Pass {} as first argument to preserve defaults/options for comparision
			options = $.extend({}, defaults, options), methods = {
				/* Adds the counter to the page and binds counter to user input fields */
				init : function($obj) {
					var objID = $obj.attr('id'), counterID = objID + '_count';
					// Insert counter after text area/box
					$('<div/>').attr('id', objID + '_counter').html("<span id=" + counterID + "/> " + methods.setMsg() ).insertAfter($obj);
					// Set $countObj jQuery object
					$countObj = $('#' + counterID);
					// Bind methods to events
					methods.bind($obj);
				},
				bind : function($obj) {
					$obj.bind("keypress.counter keydown.counter keyup.counter blur.counter focus.counter change.counter paste.counter", methods.updateCounter);
					$obj.bind("keydown.counter", methods.doStopTyping);
					$obj.trigger('keydown');
				},
				/* Sets the appropriate message after counter */
				setMsg : function() {
					if(options.msg !== '') {
						return options.msg;
					}
					this.text = "character palavra restando maximo".split(' ');
					this.chars = "s ( )".split(' ');
					this.msg = "";
					switch (options.type) {
						case "char":
							if(options.count === defaults.count && options.text) {
								// x character(s) left
								this.msg = this.text[0] + this.chars[1] + this.chars[0] + this.chars[2] + " " + this.text[2];
							} else if(options.count === "up" && options.text) {
								// x characters (x max)
								this.msg = this.text[0] + this.chars[0] + " " + this.chars[1] + options.goal + " " + this.text[3] + this.chars[2];
							}
							break;
						case "word":
							if(options.count === defaults.count && options.text) {
								// x word(s) left
								this.msg = this.text[1] + this.chars[1] + this.chars[0] + this.chars[2] + " " + this.text[2];
							} else if(options.count === "up" && options.text) {
								// x word(s) (x max)
								this.msg = this.text[1] + this.chars[1] + this.chars[0] + this.chars[2] + " " + this.chars[1] + options.goal + " " + this.text[3] + this.chars[2];
							}
							break;
						default:
					}
					return this.msg;
				},
				/* Returns the amount of words passed in the val argument
				 * @param val Words to count */
				getWords : function(val) {
					if(val !== "") {
						return $.trim(val).replace(/\s+/g, " ").split(" ").length;
					} else {
						return 0;
					}
				},
				updateCounter : function(e) {
					// Save reference to $(this)
					var $this = $(this);
					// Is the goal amount passed? (most common when pasting)
					if(countIndex < 0 || countIndex > options.goal) {
						methods.passedGoal($this);
					}
					// Counting characters...
					if(options.type === defaults.type) {
						// ...down
						if(options.count === defaults.count) {
							countIndex = options.goal - $this.val().length;
							// ...up
						} else if(options.count === 'up') {
							countIndex = $this.val().length;
						}
						// Update text
						$countObj.text(countIndex);
						// Counting words...
					} else if(options.type === 'word') {
						// ...down
						if(options.count === defaults.count) {
							// Count words
							countIndex = methods.getWords($this.val());
							// Then subtract
							countIndex = options.goal - countIndex;

							// Update text
							$countObj.text(countIndex);
							// ...up
						} else if(options.count === 'up') {
							countIndex = methods.getWords($this.val());
							$countObj.text(countIndex);
						}
					}
					return;
				},				
				/* Stops the ability to type */
				doStopTyping : function(e) {
					// backspace, delete, tab, left, up, right, down, end, home, spacebar
					var keys = [46, 8, 9, 35, 36, 37, 38, 39, 40, 32], $this = $(this);
					if(methods.isGoalReached(e)) {
						// NOTE: Refactoring this condition into a function	was too slow; it'd let you type 1 more character, THEN stop you and remove it						
						if(e.keyCode !== keys[0] && e.keyCode !== keys[1] && e.keyCode !== keys[2] && e.keyCode !== keys[3] && e.keyCode !== keys[4] && e.keyCode !== keys[5] && e.keyCode !== keys[6] && e.keyCode !== keys[7] && e.keyCode !== keys[8]) {
							// Stop typing when counting characters
							if(options.type === defaults.type) {
								return false;
								// Counting words, only allow backspace & delete
							} else if(e.keyCode !== keys[9] && e.keyCode !== keys[1] && options.type != defaults.type) {									
								return true;
							} else {
								return false;
							}
						}
					}
				},
				/* Checks to see if the goal number has been reached */
				isGoalReached : function(e) {
					var _goal;
					// Counting down
					if(options.count === defaults.count) {
						_goal = 0;
						return (countIndex <= _goal ) ? true : false;
					} else {
						// Counting up
						_goal = options.goal;
						return (countIndex >= _goal ) ? true : false;
					}
				},
				/* Removes extra words when the amount of words in the input go over the desired goal.
				 * @param {Number} numOfWords Amount of words you would like shown
				 * @param {String} text The full text to condense
				 * */
				wordStrip : function(numOfWords, text) {
					var wordCount = text.replace(/\s+/g, ' ').split(' ').length;

					// Get the word count by counting the spaces (after eliminating trailing white space)
					text = $.trim(text);

					// Make it worth executing
					if(numOfWords <= 0 || numOfWords === wordCount) {
						return text;
					} else {
						text = $.trim(text).split(' ');
						text.splice(numOfWords, wordCount, '');
						return $.trim(text.join(' '));
					}
				},
				/* If the goal is passed, trim the chars/words down to what is allowed. Also, reset the counter. */
				passedGoal : function($obj) {
					var userInput = $obj.val();
					if(options.type === 'word') {
						$obj.val(methods.wordStrip(options.goal, userInput));
					}
					if(options.type === 'char') {
						$obj.val(userInput.substring(0, options.goal));
					}
					// Reset to 0
					if(options.type === 'down') {
						$countObj.val('0');
					}
					// Reset to goal
					if(options.type === 'up') {
						$countObj.val(options.goal);
					}
				}
			};
			return this.each(function() {
				methods.init($(this));
			});
		}
	});
})(jQuery);