/**
* If there is going to be more than 1 type of popup related to the badges
*	we need something to manage them all.
*
*	First call register passing the @selector which will be assigned a listener of @type.
*	When this @type event triggers, @func will be called. @func should close the popup.
* NOTE: @func is forwarded the event parameter, however this paramter may be null. Be sure to check for this.
*
* After register, call assign to set up listeners which will trigger a popup to open.
*	assign is a wrapper around listeners that closes other open popups.
*
*	If you want to force your popup to be the only one open call set_master.
*
* Use set_active to turn off/on the handlers.
*
* EXAMPLE USAGE:

*	var popup = new PopUp();
*	bf_badge_popup.register(popup, $$('body')[0], 'click', function(evt) {
* 	popup.close();
* });
*	bf_badge_popup.assign(popup, $$('.button'), 'mouseover', function(evt) {
* 	popup.open();
*	});
*	
*/
var bf_badge_popup = {
_objs_seed: 0, _objs: { }, _active: true,
	_master_obj: null,
////////
	register: function(obj, selector, type, func) {
		var objid = this._objs_seed++;
		this._objs[objid] = {
			obj: obj,
			is_open: false,
			on_close: func
		};	
		this._wrap('close', objid, selector, type, func);
	},
////////
	assign: function(obj, selector, type, func) {
		var objid = this._find_objid(obj);
		if(objid === false) return;
		this._wrap('open', objid, selector, type, func);
	},
////////
	unregister: function(obj) {
		var objid = this._find_objid(obj);
		if(objid === false) return;
		delete this._objs[objid];
	},
////////
	set_master: function(obj) {
		this._master_obj = obj;
	},
////////
	force_close: function(obj) {
		this._close_all();
		if(this._master_obj == obj) {
			this._master_obj = null;
		}
	},
////////
	force_open: function(obj) {
		var objid = this._find_objid(obj);
		if(objid === false) return;
		obj = this._objs[objid];
		this._close_all(obj.obj);
		obj.is_open = true;
	},
////////
	set_active: function(val) {
		this._active = val;
	},
////////
	_wrap: function(wrap_type, objid, selector, evt_type, func) {
		if(selector.each) {
			var self = this;
			selector.each(function(ele) {
				self['_wrap_' + wrap_type](objid, ele, evt_type, func);
			});
		} else {
			this['_wrap_' + wrap_type](objid, selector, evt_type, func);
		}
	},
////////
	_wrap_close: function(objid, ele, type, func) {
		var self = this;
		ele.observe(type, function(evt) {
			if(!self._active) return;
			var obj = self._objs[objid];
			if(!obj) {
				ele.stopObserving(type, arguments.callee);
			} else if(obj.is_open && (!self._master_obj || obj.obj == self._master_obj)) {
				var ret = func(evt);
				if(ret !== false) {
					obj.is_open = false;
					self._master_obj = null;
				}
			}
		});
	},
////////
	_wrap_open: function(objid, ele, type, func) {
		var self = this;
		ele.observe(type, function(evt) {
			if(!self._active) return;
			var obj = self._objs[objid];
			if(!obj) {
				ele.stopObserving(type, arguments.callee);
			} else if(!self._master_obj) {
				self._close_all(obj.obj);
				func(evt);
				obj.is_open = true;
			}
		});
	},
////////
	_close_all: function(skip_obj) {
		for(var p in this._objs) {
			var obj = this._objs[p];
			if(obj.is_open && obj.obj != skip_obj) {
				obj.on_close();
				obj.is_open = false;
			}
		}
	},
////////
	_find_objid: function(obj) {
		for(var p in this._objs) {
			if(this._objs[p].obj == obj) return p;
		}
		return false;
	}
};