-- Initialize the AddOn and Saved Variables
local healthNumbers
local powerNumbers
local frame = CreateFrame("Frame")
frame:RegisterEvent("ADDON_LOADED")
frame:RegisterEvent("NAME_PLATE_UNIT_ADDED")
frame:RegisterEvent("NAME_PLATE_UNIT_REMOVED")

frame:SetScript("OnEvent", function(self, event, ...) self[event](self,...) end)

function frame.round(num, idp)
	return tonumber(string.format("%." .. (idp or 0) .. "f", num))
end

function frame.formatPlayerNumbers(amount)
	local formatted, k = amount
	while true do
		formatted, k = string.gsub(formatted, "^(-?%d+)(%d%d%d)", '%1,%2')
		if (k==0) then
			break
		end
	end

	if string.len(formatted) >= 7 and string.len(formatted) < 11 then
		formatted = string.sub(formatted, 0, (string.len(formatted) - 4)) .. "k"
	elseif string.len(formatted) >= 11 then
		formatted = string.sub(formatted, 0, (string.len(formatted) - 8)) .. "m"
	end

	return formatted
end


function frame:NAME_PLATE_UNIT_ADDED(unitID) --for health numbers
	if not UnitIsUnit(unitID, "player") then return end
	self:RegisterUnitEvent("UNIT_HEALTH_FREQUENT", "player")
	self:RegisterUnitEvent("UNIT_POWER_FREQUENT", "player")
	local playernameplate = C_NamePlate.GetNamePlateForUnit(unitID)--returns table
	local playernameplatename = playernameplate:GetName()
	if not healthNumbers then
		healthNumbers = CreateFrame("Frame", nil, NamePlatePlayerResourceFrame) -- Setting up health display
		healthNumbers.text = healthNumbers:CreateFontString(nil, "OVERLAY")
		healthNumbers.text:SetAllPoints(true)
		healthNumbers:SetFrameStrata("HIGH")
		healthNumbers.text:SetFont("FONTS\\FRIZQT__.TTF", 11, "OUTLINE")
		healthNumbers.text:SetVertexColor(1, 1, 1)
	end
	if healthNumbers.attachedto ~= playernameplatename then --playernameplate switches
		healthNumbers:SetAllPoints(_G[playernameplatename.."UnitFrame"].healthBar)
		healthNumbers.attachedto = playernameplatename
	end
	self:UNIT_HEALTH_FREQUENT("player") -- for the case that the player regend health or ressources(mana, energy etc.)to full while the nameplate wasn't shown
	self:UNIT_POWER_FREQUENT("player")
end

function frame:NAME_PLATE_UNIT_REMOVED(unitID)
	if not UnitIsUnit(unitID, "player") then return end
	self:UnregisterEvent("UNIT_HEALTH_FREQUENT")
	self:UnregisterEvent("UNIT_POWER_FREQUENT")
end

function frame:UNIT_POWER_FREQUENT(unit)
	if InterfaceOptionsNamesPanelUnitNameplatesMakeLarger:GetValue() == "1" then
		local powerPercentage = self.round((UnitPower(unit) / UnitPowerMax(unit) * 100), 0)
		if not powerNumbers then
			powerNumbers = CreateFrame("Frame", nil, ClassNameplateManaBarFrame) -- Setting up resource display
			powerNumbers:SetAllPoints(true)
			powerNumbers.text = powerNumbers:CreateFontString(nil, "OVERLAY")
			powerNumbers.text:SetAllPoints(true)
			powerNumbers:SetFrameStrata("HIGH")
			powerNumbers.text:SetFont("FONTS\\FRIZQT__.TTF", 11, "OUTLINE")
			powerNumbers.text:SetVertexColor(1, 1, 1)
		end
		if PersonalResourceDisplayNumbersDB.numbersDisplay == "Numeric Value" then
				powerNumbers.text:SetText(self.formatPlayerNumbers(UnitPower(unit)) .. "/" .. self.formatPlayerNumbers(UnitPowerMax("player"))) -- Update resource numbers
		elseif PersonalResourceDisplayNumbersDB.numbersDisplay == "Current" then
				powerNumbers.text:SetText(self.formatPlayerNumbers(UnitPower(unit))) -- Update resource numbers
		elseif PersonalResourceDisplayNumbersDB.numbersDisplay == "Percentage" then
				powerNumbers.text:SetText(powerPercentage .. "%") -- Update resource percentages
		elseif PersonalResourceDisplayNumbersDB.numbersDisplay == "Both" then
				powerNumbers.text:SetText(self.formatPlayerNumbers(UnitPower(unit)) .. "/" .. self.formatPlayerNumbers(UnitPowerMax("player")) .. " - " .. powerPercentage .. "%") -- Update resource numbers + percentage
		elseif PersonalResourceDisplayNumbersDB.numbersDisplay == "Hide" then
				powerNumbers.text:SetText()
		end
	end
end

function frame:UNIT_HEALTH_FREQUENT(unit)
	if InterfaceOptionsNamesPanelUnitNameplatesMakeLarger:GetValue() == "1" then
		local healthPercentage = self.round((UnitHealth(unit) / UnitHealthMax(unit) * 100), 0)
		if PersonalResourceDisplayNumbersDB.numbersDisplay == "Numeric Value" then
			healthNumbers.text:SetText(self.formatPlayerNumbers(UnitHealth("player")) .. "/" .. self.formatPlayerNumbers(UnitHealthMax("player"))) -- Update health numbers
		elseif PersonalResourceDisplayNumbersDB.numbersDisplay == "Current" then
			healthNumbers.text:SetText(self.formatPlayerNumbers(UnitHealth("player"))) -- Update health numbers (only show current)
		elseif PersonalResourceDisplayNumbersDB.numbersDisplay == "Percentage" then
			healthNumbers.text:SetText(healthPercentage .. "%") -- Update health percentages
		elseif PersonalResourceDisplayNumbersDB.numbersDisplay == "Both" then
			healthNumbers.text:SetText(self.formatPlayerNumbers(UnitHealth("player")) .. "/" .. self.formatPlayerNumbers(UnitHealthMax("player")) .. " - " .. healthPercentage .. "%") -- Update health numbers + percentages
		elseif PersonalResourceDisplayNumbersDB.numbersDisplay == "Hide" then
			healthNumbers.text:SetText()
		end
	end
end


function frame:ADDON_LOADED(addon)
	if addon == "PersonalResourceDisplayNumbers" then
		-- Our saved variables, if they exist, have been loaded at this point.
		if PersonalResourceDisplayNumbersDB == nil then
			-- This is the first time this addon is loaded; set SVs to default values
			PersonalResourceDisplayNumbersDB = {
				numbersDisplay = "Numeric Value"
			}
		end
	end
end




-- Set up /slash commands
SLASH_PRDN1 = '/resourcedisplay'
function SlashCmdList.PRDN(msg, editbox)
	--local command, rest = msg:match("^(%S*)%s*(.-)$")
	-- Any leading non-whitespace is captured into command
	-- the rest (minus leading whitespace) is captured into rest.

	if msg == "numbers" then
		PersonalResourceDisplayNumbersDB.numbersDisplay = "Numeric Value"
		print("Now displaying Personal Resource Display numbers as Numeric Value.")
	elseif msg == "current" then
		PersonalResourceDisplayNumbersDB.numbersDisplay = "Current"
		print("Now displaying Personal Resource Display numbers as Numeric Value (only current amount.)")
	elseif msg == "percentages" then
		PersonalResourceDisplayNumbersDB.numbersDisplay = "Percentage"
		print("Now displaying Personal Resource Display numbers as Percentage.")
	elseif msg == "both" then
		PersonalResourceDisplayNumbersDB.numbersDisplay = "Both"
		print("Now displaying Personal Resource Display numbers as Both.")
	elseif msg == "hide" then
		PersonalResourceDisplayNumbersDB.numbersDisplay = "Hide"
		print("Now hiding Personal Resource Display numbers.")
	elseif msg == "help" then
		print("Personal Resource Display Numbers setup:")
		print("\"/resourcedisplay numbers\" : Display numbers as Numeric Values.")
		print("\"/resourcedisplay current\" : Display numbers as Numeric Values (only current value.)")
		print("\"/resourcedisplay percentages\" : Display numbers as Percentages.")
		print("\"/resourcedisplay both\" : Display both Percentages and Numeric Values.")
		print("\"/resourcedisplay hide\" : Hide the number display.")
	else
		print("Invalid syntax, please see /resourcedisplay help")
	end
end