// jQuery protip - Simple tooltip from Propeller Communications
// version 0.0.2 (uber alpha) (do not use) (pain of death)

// See README for details. https://github.com/Propcom/Protip

(function($) {

	var preset = {};
	preset.next = function() {
		return $(this).next();
	};
	
	function position(what, where, anchor, offset) {
		var relPos = where.split(' ');
	
		switch (relPos[0]) {
			case 'bottom':
				anchor.top += anchor.height;
				break;
			case 'top':
				anchor.top -= what.outerHeight();
				break;
			case 'centre':
				anchor.top += (anchor.height - what.outerHeight()) / 2;
				break;
		}
	
		switch (relPos[1]) {
			case 'right':
				anchor.left += anchor.width;
				break;
			case 'left':
				anchor.left -= what.outerWidth();
				break;
			case 'centre':
				anchor.left += (anchor.width - what.outerWidth()) / 2;
				break;
		}
	
		what.offset({
			'top': anchor.top + offset[1],
			'left': anchor.left + offset[0]
		});
	}
	
	$.fn.protip = function(opts){
		var self = this,
			args = opts,
			tip, fixed,
			api;
	
		if (api = self.data('protip')) {
			if (typeof args == 'object')  {
				return;
			}
	
			var a = [].slice.apply(arguments);
			a.shift();
	
			// The events get called on single objects, but the API could be called on
			// a collection, so in this case we have to pick one.
			var ret = api[args].apply(self.first(),a);
			if (ret === undefined)
				return self;
			else
				return ret;
		}
	
		api = {
			show: function(mouseEvent) {
				var anchor = args.anchor;
	
				tip = args.tip.apply(this);
				if (tip === false) {
					return;
				}
				if (tip.is(':visible') && fix) {
					return;
				}
	
				if (anchor == 'mouse') {
					anchor = {
						'top': mouseEvent.pageY,
						'left': mouseEvent.pageX,
						'height': 1,
						'width': 1
					};
				}
				else if (anchor == 'element') {
					anchor = this.offset();
					anchor.height = this.outerHeight();
					anchor.width = this.outerWidth();
				}
	
				tip.css({
					display: 'inline-block',
					position: 'absolute'
				}); // have to show it first or we can't find its size
				position(tip, args.position, anchor, args.offset);
				this.trigger('protip.show');
			},
			hide: function() {
				if (fixed) return;
	
				if (tip) {
					tip.hide();
					this.trigger('protip.hide');
				}
			},
			reposition: function(mouseEvent) {
				if (fixed) return;
	
				var anchor = {
					'top': mouseEvent.pageY,
					'left': mouseEvent.pageX,
					'height': 1,
					'width': 1
				};
				position(tip, args.position, anchor, args.offset);
			},
			cohort: function() {
				return self;
			},
			fix: function() {
				fixed = true;
			},
			unfix: function() {
				fixed = false;
			}
		};
	
		args = $.extend({}, {
			position: 'top right',
			anchor: 'mouse',
			offset: [10, -10],
			tip: 'next',
			showEvents: 'mouseenter',
			hideEvents: 'mouseleave'
		}, args);
	
		if (typeof args.tip != 'function') {
			args.tip = preset[args.tip];
		}
	
		self.bind(args.showEvents, function(event) {
			if (! args.onBeforeShow 
			||    args.onBeforeShow.call($(this)) !== false) {
				api.show.call($(this), event);
			}
		}).bind(args.hideEvents, function() {
			if (! args.onBeforeHide 
			||    args.onBeforeHide.call($(this)) !== false) {
				api.hide.call($(this));
			}
		}).bind('mousemove', function(event) {
			if (tip && args.anchor == 'mouse') {
				api.reposition.call($(this), event);
			}
		});
	
		if (args.onShow)
			self.bind('protip.show', args.onShow);
		if (args.onHide)
			self.bind('protip.hide', args.onHide);
	
		self.data('protip', api);
		return self;
	};


})(jQuery);