local E, L, V, P, G = unpack(ElvUI)
local NP = E:GetModule('NamePlates')

local unpack = unpack
local hooksecurefunc = hooksecurefunc

function NP:Portrait_PreUpdate()
	local nameplate = self.__owner

	if self.backdrop then
		self.backdrop:Hide()
	end

	local db = NP:PlateDB(nameplate)
	local specIcon = db.portrait and db.portrait.specicon and nameplate.specIcon
	self.useClassBase = not specIcon
end

function NP:Portrait_PostUpdate(unit, hasStateChanged, texCoords)
	local nameplate = self.__owner
	local db = NP:PlateDB(nameplate)
	local styleFilter = NP:StyleFilterChanges(nameplate)

	if db.portrait and (styleFilter.general and styleFilter.general.portrait or db.portrait.enable) then
		local specIcon = db.portrait.specicon and nameplate.specIcon
		if specIcon then
			self:SetTexture(specIcon)
			self.backdrop:Show()
		elseif self.useClassBase then
			self.backdrop:Show()
		end

		if texCoords then -- monks on Mists Classic
			local left, right, top, bottom = unpack(texCoords)
			self:SetTexCoord(left+0.02, right-0.02, top+0.02, bottom-0.02)
		elseif db.portrait.keepSizeRatio then
			self:SetTexCoord(unpack(E.TexCoords))
		else
			local width, height = self:GetSize()
			local left, right, top, bottom = E:CropRatio(width, height)
			self:SetTexCoord(left, right, top, bottom)
		end
	end
end

function NP:Update_PortraitBackdrop()
	if self.backdrop then
		self.backdrop:SetShown(self:IsShown())
	end
end

function NP:Construct_Portrait(nameplate)
	local Portrait = nameplate.RaisedElement:CreateTexture(nameplate.frameName..'Portrait', 'OVERLAY', nil, 2)
	Portrait:CreateBackdrop(nil, nil, nil, nil, nil, true, true)
	Portrait:SetTexCoord(.18, .82, .18, .82)
	Portrait:SetSize(28, 28)
	Portrait:Hide()

	Portrait.PreUpdate = NP.Portrait_PreUpdate
	Portrait.PostUpdate = NP.Portrait_PostUpdate

	hooksecurefunc(Portrait, 'Hide', NP.Update_PortraitBackdrop)
	hooksecurefunc(Portrait, 'Show', NP.Update_PortraitBackdrop)

	return Portrait
end

function NP:Update_Portrait(nameplate)
	local db = NP:PlateDB(nameplate)
	local styleFilter = NP:StyleFilterChanges(nameplate)

	if db.portrait and ((styleFilter.general and styleFilter.general.portrait) or db.portrait.enable) then
		if not nameplate:IsElementEnabled('Portrait') then
			nameplate:EnableElement('Portrait')
			nameplate.Portrait:ForceUpdate()
		end

		nameplate.Portrait:Size(db.portrait.width, db.portrait.height)

		-- These values are forced in name only mode inside of DisablePlate
		if not (db.nameOnly or (styleFilter.general and styleFilter.general.nameOnly)) then
			nameplate.Portrait:ClearAllPoints()
			nameplate.Portrait:Point(E.InversePoints[db.portrait.position], nameplate, db.portrait.position, db.portrait.xOffset, db.portrait.yOffset)
		end
	elseif nameplate:IsElementEnabled('Portrait') then
		nameplate:DisableElement('Portrait')
	end
end
