local BaseCommon = BaseCommon or {}

-- event
function BaseCommon.DispatchCustomEvent(__name, __data, __cmd)
    if (not __name) then
        assert(false, "BaseCommon.DispatchCustomEvent __name is null")
    end
    local event = cc.EventCustom:new(__name)
    event._usedata = __data
    event._cmd = __cmd
    cc.Director:getInstance():getEventDispatcher():dispatchEvent(event)
end

function BaseCommon.AddCustomEvent(__node, __eventName, __handler)
    if (not __eventName) then
        assert(false, "BaseCommon.AddCustomEvent __eventName is null")
    end
    local listener = cc.EventListenerCustom:create(__eventName, __handler)
    cc.Director:getInstance():getEventDispatcher():addEventListenerWithSceneGraphPriority(listener, __node)
    return listener
end

function BaseCommon.AddFixedCustomEvent(__eventName, __handler)
	local listener = cc.EventListenerCustom:create(__eventName, __handler)
	cc.Director:getInstance():getEventDispatcher():addEventListenerWithFixedPriority(listener, 1)
	return listener
end

function BaseCommon.RemoveFixedCustomEvent(__listener)
	cc.Director:getInstance():getEventDispatcher():removeEventListener(__listener)
end

-- const table
function BaseCommon.NewConst( const_table )    
    local function Const( const_table )
        local mt =
        {
            __index = function (t,k)
                if type(const_table[k])=="table" then
                    const_table[k] = BaseCommon.NewConst(const_table[k])
                end
                return const_table[k]
            end,
            __newindex = function (t,k,v)
                error("can't update " .. tostring(t) .."[" .. tostring(k) .."] = " .. tostring(v))
                -- dump(t)
            end
        }
        return mt
    end

    local t = {}
    setmetatable(t, Const(const_table))
    return t
end


return BaseCommon