var btn_group_events = {};
var btn_group_events_objects = {};

function IsButtonGroup(btn_group)
{
	if (btn_group)	
		return $(btn_group).hasClass("btn-group");	
	return false;
}

function IsButtonGroupMember(element)
{
	if (element)	
		return $(element).hasClass("btn-group-member");	
	return false;
}

function IsButtonGroupCheckBox(btn_group)
{
	if (btn_group)	
	{		
		var result = $(btn_group).hasClass("btn-group");	
		result &= $(btn_group).hasClass("btn-group-check-box");			
		return result;
	}
	return false;
}

function GetButtonGroupActiveButton(btn_group)
{	
	var result = null;
	if (IsButtonGroup(btn_group))	
	{						
		$(btn_group).children(".btn-group-active").each(function (btn_index, btn_child) 
		{						
			result = btn_child;
			return;
		});
	}	
	return result;
}

function GetButtonGroupButtonByValue(btn_group, value)
{	
	var result = null;
	if (IsButtonGroup(btn_group))	
	{				
		$(btn_group).children(".btn-group-member").each(function (btn_index, btn_child) 
		{			
			if (btn_child.value == value)
			{				
				result = btn_child;
				return;			
			}
		});
	}	
	return result;
}

function GetButtonGroupValue(btn_group)
{	
	if (IsButtonGroup(btn_group))	
	{				
		var active_button = GetButtonGroupActiveButton(btn_group);
		if (active_button)
			return active_button.value;
	}
	return "";
}

function DoChangeButtonGroupActiveButton(btn_group, active_button, trigger_event)
{			
	if (trigger_event === undefined)
		trigger_event = true;
	$(active_button).addClass("btn-group-active");	
	UpdateButtonGroupHiddenInputValue(btn_group, active_button);			
	$(btn_group).children(".btn-group-member").each(function (btn_index, btn_child) 
	{
		if (btn_child != $(active_button)[0])
			$(btn_child).removeClass("btn-group-active");		
	});	
	
	//  trigger event
	if (trigger_event)
	{
		var event_handler = GetUniqueElementID(btn_group);					
		if (btn_group_events[event_handler])
			btn_group_events[event_handler](btn_group, $(active_button).val(), btn_group_events_objects[event_handler]);
	}
}

function SetButtonGroupValue(btn_group, value)
{		
	if (IsButtonGroup(btn_group))	
	{				
		var active_button = GetButtonGroupButtonByValue(btn_group, value);				
		if (active_button)
			DoChangeButtonGroupActiveButton(btn_group, active_button);		
	}
}

function SetButtonGroupCheckBoxValue(btn_group, value, trigger_event)
{	
	if (IsButtonGroupCheckBox(btn_group))	
	{				
		var active_button = null;
		if ((value === true) || (value == "true"))			
			active_button = GetButtonGroupButtonByValue(btn_group, "true");		
		else if ((value === false) || (value == "false"))
			active_button = GetButtonGroupButtonByValue(btn_group, "false");				
		if (active_button)
			DoChangeButtonGroupActiveButton(btn_group, active_button, trigger_event);		
	}
}

function ClearButtonGroupCheckBoxValue(btn_group)
{
	var active_button = GetButtonGroupActiveButton(btn_group);
	if (active_button)
		$(active_button).removeClass("btn-group-active");
}

function IsButtonGroupCheckBoxOn(btn_group)
{	
	if (IsButtonGroupCheckBox(btn_group)) {		
		return (GetButtonGroupValue(btn_group) == "true");		
	}
	return false;
}

function IsButtonGroupCheckBoxOff(btn_group)
{		
	return (!IsButtonGroupCheckBoxOn(btn_group));
}

function IsButtonGroupSelected(btn_group)
{	
	return (GetButtonGroupValue(btn_group) != "");
}

function UpdateButtonGroupHiddenInputValue(btn_group, active_btn_group_member)
{
	if ((btn_group) &&
		(active_btn_group_member) &&
		(IsButtonGroup(btn_group)))
	{
		$(btn_group).children("input").each(function (index, child) 
		{						
			child.value = active_btn_group_member.value;				
			return;			
		});		
	}
}

function FillButtonGroupMemberHandlers()
{
	$(".btn-group-member").each(function() 
	{
		var object = this;
		$(this).on("click", function()
		{ 
			DoChangeButtonGroupActiveButton($(object).parent(), object);
		});
	});
}

function AddButtonGroupEventListener(btn_group, on_change, data_object)
{		
	if (IsButtonGroup(btn_group))
	{				
		var element_id = GetUniqueElementID(btn_group);			
		btn_group_events[element_id] = on_change;
		data_object = (data_object == undefined) ? null : data_object;
		btn_group_events_objects[element_id]	= data_object;
	}
}

function AddButtonGroupEventListenerForAll(on_change, data_object)
{
	$(".btn-group").each(function() 
	{
		var element_id = GetUniqueElementID($(this)[0]);				
		// add event listener only if it is empty
		if (!btn_group_events[element_id])		
			AddButtonGroupEventListener($(this)[0], on_change, data_object);	
	});
}

$(document).ready(function()
{	
	FillButtonGroupMemberHandlers();
});