/*
	Spinbox control
	
	Developer: Govinda K Sahu (M1006827)
*/

$.fn.SpinButton = function(cfg){
	return this.each(function(){

		// Apply specified options or defaults:
		// (Ought to refactor this some day to use $.extend() instead)
		this.spinCfg = {
			//min: cfg && cfg.min ? Number(cfg.min) : null,
			//max: cfg && cfg.max ? Number(cfg.max) : null,
			min: cfg && !isNaN(parseFloat(cfg.min)) ? Number(cfg.min) : null,	// Fixes bug with min:0
			max: cfg && !isNaN(parseFloat(cfg.max)) ? Number(cfg.max) : null,
			step: cfg && cfg.step ? Number(cfg.step) : 1,
			page: cfg && cfg.page ? Number(cfg.page) : 10,
			upClass: cfg && cfg.upClass ? cfg.upClass : 'up',
			downClass: cfg && cfg.downClass ? cfg.downClass : 'down',
			reset: cfg && cfg.reset ? cfg.reset : this.value,
			delay: cfg && cfg.delay ? Number(cfg.delay) : 500,
			interval: cfg && cfg.interval ? Number(cfg.interval) : 100,
			processPage: cfg && cfg.processPage ? cfg.processPage : 'no',
			busy: cfg && cfg.busy ? cfg.busy : 'false',
			_btn_width: 20,
			_btn_height: 12,
			_direction: null,
			_delay: null,
			_repeat: null
		};
		
		this.adjustValue = function(i){
			var v = (isNaN(this.value) ? this.spinCfg.reset : Number(this.value)) + Number(i);
			if (this.spinCfg.min !== null) v = Math.max(v, this.spinCfg.min);
		//	if (this.spinCfg.max !== null) v = Math.min(v, this.spinCfg.max);
			this.value = v;
			if ( this.spinCfg.processPage == 'yes' && this.name.substring ( 0, 6) == 'qtyBox' ) checkboxstatus ( this.name );
			if ( this.spinCfg.busy == 'false' && this.name.substring ( 0, 9) == 'quantity_') document.getElementById("busy").value = 'true';
			
		};
		
		$(this)
		.addClass(cfg && cfg.spinClass ? cfg.spinClass : 'spin-button')
		
		.mousemove(function(e){
			// Determine which button mouse is over, or not (spin direction):
			var x = e.pageX || e.x;
			var y = e.pageY || e.y;
			var el = e.target || e.srcElement;
			var direction = 
				(x > coord(el,'offsetLeft') + el.offsetWidth - this.spinCfg._btn_width)
				? ((y < coord(el,'offsetTop') + this.spinCfg._btn_height) ? 1 : -1) : 0;
			
			if (direction !== this.spinCfg._direction) {
				// Style up/down buttons:
				switch(direction){
					case 1: // Up arrow:
						$(this).removeClass(this.spinCfg.downClass).addClass(this.spinCfg.upClass);
						break;
					case -1: // Down arrow:
						$(this).removeClass(this.spinCfg.upClass).addClass(this.spinCfg.downClass);
						break;
					default: // Mouse is elsewhere in the textbox
						$(this).removeClass(this.spinCfg.upClass).removeClass(this.spinCfg.downClass);
				}
				
				// Set spin direction:
				this.spinCfg._direction = direction;
			}
		})
		
		.mouseout(function(){
		
			//Added by Neha - START
			//Issue Fixed - 99 : Scrolling problem in Weekly Special & Review pages
			// Fixed on - 11 June 2009
			// Cancel repeating adjustment
			window.clearInterval(this.spinCfg._repeat);
			window.clearTimeout(this.spinCfg._delay);
			//Added By Neha - END
			
			
			// Reset up/down buttons to their normal appearance when mouse moves away:
			$(this).removeClass(this.spinCfg.upClass).removeClass(this.spinCfg.downClass);
			this.spinCfg._direction = null;
		})
		
		.mousedown(function(e){
			if (this.spinCfg._direction != 0) {
				// Respond to click on one of the buttons:
				var self = this;
				var adjust = function() {
					self.adjustValue(self.spinCfg._direction * self.spinCfg.step);
				};
			
				adjust();
				
				// Initial delay before repeating adjustment
				self.spinCfg._delay = window.setTimeout(function() {
					adjust();
					// Repeat adjust at regular intervals
					self.spinCfg._repeat = window.setInterval(adjust, self.spinCfg.interval);
				}, self.spinCfg.delay);
			}
		})
		
		.mouseup(function(e){
			// Cancel repeating adjustment
			window.clearInterval(this.spinCfg._repeat);
			window.clearTimeout(this.spinCfg._delay);
		})
		
		.dblclick(function(e) {
			if ($.browser.msie)
				this.adjustValue(this.spinCfg._direction * this.spinCfg.step);
		})
		
		.keydown(function(e){
			// Respond to up/down arrow keys.
			switch(e.keyCode){
				case 38: this.adjustValue(this.spinCfg.step);  break; // Up
				case 40: this.adjustValue(-this.spinCfg.step); break; // Down
				case 33: this.adjustValue(this.spinCfg.page);  break; // PageUp
				case 34: this.adjustValue(-this.spinCfg.page); break; // PageDown
			}
		})

		.bind("mousewheel", function(e){
			// Respond to mouse wheel in IE. (It returns up/dn motion in multiples of 120)
			if (e.wheelDelta >= 120)
				this.adjustValue(this.spinCfg.step);
			else if (e.wheelDelta <= -120)
				this.adjustValue(-this.spinCfg.step);
			
			e.preventDefault();
		})
		
		.change(function(e){
			this.adjustValue(0);
		});
		
		if (this.addEventListener) {
			// Respond to mouse wheel in Firefox
			this.addEventListener('DOMMouseScroll', function(e) {
				if (e.detail > 0)
					this.adjustValue(-this.spinCfg.step);
				else if (e.detail < 0)
					this.adjustValue(this.spinCfg.step);
				
				e.preventDefault();
			}, false);
		}
	});
	
	function coord(el,prop) {
		var c = el[prop], b = document.body;
		
		while ((el = el.offsetParent) && (el != b)) {
			if (!$.browser.msie || (el.currentStyle.position != 'relative'))
				c += el[prop];
		}
		
		return c;
	}

	// On change of value enable or disable checkboxes in product listing and search result pages only
	function checkboxstatus ( qtyBox_id )  {
		if ( document.getElementById  ( qtyBox_id ).value == 0 ) 	document.getElementById  ( "checkBox_" + qtyBox_id.substring(7) ).checked = false;
		else document.getElementById  ( "checkBox_" + qtyBox_id.substring(7) ).checked = true;
	}
};