-- --------------------
-- TellMeWhen
-- Originally by Nephthys of Hyjal <lieandswell@yahoo.com>

-- Other contributions by:
--		Sweetmms of Blackrock, Oozebull of Twisting Nether, Oodyboo of Mug'thol,
--		Banjankri of Blackrock, Predeter of Proudmoore, Xenyr of Aszune

-- Currently maintained by
-- Cybeloras of Aerie Peak
-- --------------------


if not TMW then return end

local TMW = TMW
local L = TMW.L
local print = TMW.print


local Counter = TMW.C.EventHandler_WhileConditions_Repetitive:New("Counter", 50)
Counter.frequencyMinimum = 0

Counter:RegisterEventDefaults{
	Counter = "",
	CounterOperation = "+",
	CounterAmt = 1,
}

TMW.COUNTERS = setmetatable({}, {__index = function() return 0 end})
local COUNTERS = TMW.COUNTERS


function Counter:SanitizeCounterName(counter)
	-- don't return in a single line because that will return all of gsub's return values, which we don't want.
	counter = tostring(counter):trim():lower():gsub("[ \t\r\n]", "")
	return counter
end

-- Required methods
function Counter:ProcessIconEventSettings(event, eventSettings)
	return eventSettings.Counter ~= ""
end

function TMW:ChangeCounter(name, operation, value)
	name = Counter:SanitizeCounterName(name)

	if operation == "+" then
		COUNTERS[name] = COUNTERS[name] + value
	elseif operation == "-" then
		COUNTERS[name] = COUNTERS[name] - value
	elseif operation == "/" and value ~= 0 then
		COUNTERS[name] = COUNTERS[name] / value
	elseif operation == "*" then
		COUNTERS[name] = COUNTERS[name] * value
	elseif operation == "=" then
		COUNTERS[name] = value
	else
		TMW:Error("Unknown counter operation '" .. operation .. "'")
		return
	end
	
	TMW:Fire("TMW_COUNTER_MODIFIED", name)

	return true
end

function Counter:HandleEvent(icon, eventSettings)
	local Counter = eventSettings.Counter
	local CounterOperation = eventSettings.CounterOperation
	local CounterAmt = eventSettings.CounterAmt

	return TMW:ChangeCounter(Counter, CounterOperation, CounterAmt)
end

function Counter:OnRegisterEventHandlerDataTable()
	error("The Counter event handler does not support registration of event handler data - everything is user-defined.", 3)
end



local ConditionCategory = TMW.CNDT:GetCategory("MISC")

ConditionCategory:RegisterCondition(0.5,	"COUNTER", {
	text = L["EVENTHANDLER_COUNTER_TAB"],
	tooltip = L["CONDITIONPANEL_COUNTER_DESC"],
	range = 15,
	step = 1,

	unit = false,
	icon = "Interface\\Icons\\spell_chargepositive",
	name = function(editbox)
		editbox:SetTexts(L["CONDITION_COUNTER"], L["CONDITION_COUNTER_EB_DESC"])
	end,
	useSUG = "counterName",
	tcoords = TMW.CNDT.COMMON.standardtcoords,
	Env = {
		COUNTERS = COUNTERS,
	},
	funcstr = function(c, icon)
		local counter = format("%q", Counter:SanitizeCounterName(c.Name))

		return "COUNTERS[" .. counter .. "] c.Operator c.Level"
	end,
	events = function(ConditionObject, c)
		return
			ConditionObject:GenerateNormalEventString("TMW_COUNTER_MODIFIED", Counter:SanitizeCounterName(c.Name))
	end,
})

ConditionCategory:RegisterSpacer(0.6)



local DogTag = LibStub("LibDogTag-3.0", true)
if DogTag then

	TMW:RegisterCallback("TMW_COUNTER_MODIFIED", DogTag.FireEvent, DogTag)

	DogTag:AddTag("TMW", "Counter", {
		code = function(countername)
			return COUNTERS[Counter:SanitizeCounterName(countername)]
		end,
		arg = {
			'countername', 'string', '@req',
		},
		ret = "number",
		doc = L["DT_DOC_Counter"],
		example = '[Counter("countername")] => "3"',
		events = "TMW_COUNTER_MODIFIED",
		category = L["MISCELLANEOUS"],
	})
end
