
Skada:AddLoadableModule("Threat", function(Skada, L)
	if Skada.db.profile.modulesBlocked.Threat then return end

	local media = LibStub("LibSharedMedia-3.0")

	-- This mode is a bit special.
	local mod = Skada:NewModule(L["Threat"])

	local CLIENT_VERSION = tonumber((select(4, GetBuildInfo())))

	local WoW5 = CLIENT_VERSION > 50000

	local opts = {
		options = {
			type="group",
			name=L["Threat"],
			args={
				warnings = {
					type="group",
					name=L["Threat warning"],
					inline=true,
					order=1,
					args={

						flash = {
							type="toggle",
							name=L["Flash screen"],
							desc=L["This will cause the screen to flash as a threat warning."],
							get=function() return Skada.db.profile.modules.threatflash end,
							set=function(self, val) Skada.db.profile.modules.threatflash = val end,
							order=2,
						},

						shake = {
							type="toggle",
							name=L["Shake screen"],
							desc=L["This will cause the screen to shake as a threat warning."],
							get=function() return Skada.db.profile.modules.threatshake end,
							set=function(self, val) Skada.db.profile.modules.threatshake = not Skada.db.profile.modules.threatshake end,
							order=3,
						},

						playsound = {
							type="toggle",
							name=L["Play sound"],
							desc=L["This will play a sound as a threat warning."],
							get=function() return Skada.db.profile.modules.threatsound end,
							set=function(self, val) Skada.db.profile.modules.threatsound = not Skada.db.profile.modules.threatsound end,
							order=4,
						},

						sound = {
							 type = 'select',
							 dialogControl = 'LSM30_Sound',
							 name = L["Threat sound"],
							 desc = L["The sound that will be played when your threat percentage reaches a certain point."],
							 values = AceGUIWidgetLSMlists.sound,
							 get = function() return Skada.db.profile.modules.threatsoundname end,
							 set = function(self,val) Skada.db.profile.modules.threatsoundname = val end,
							order=5,
						},

						treshold = {
							 type = 'range',
							 name = L["Threat threshold"],
							 desc = L["When your threat reaches this level, relative to tank, warnings are shown."],
							 min=0,
							 max=130,
							 step=1,
							 get = function() return Skada.db.profile.modules.threattreshold end,
							 set = function(self,val) Skada.db.profile.modules.threattreshold = val end,
							order=6,
						},

						notankwarnings = {
							type = "toggle",
							name = L["Do not warn while tanking"],
							get = function() return Skada.db.profile.modules.notankwarnings end,
							set = function() Skada.db.profile.modules.notankwarnings = not Skada.db.profile.modules.notankwarnings end,
							order=2,
						},

					},
				},

				rawthreat = {
					type = "toggle",
					name = L["Show raw threat"],
					desc = L["Shows raw threat percentage relative to tank instead of modified for range."],
					get = function() return Skada.db.profile.modules.threatraw end,
					set = function() Skada.db.profile.modules.threatraw = not Skada.db.profile.modules.threatraw end,
					order=2,
				},

				focustarget = {
					type = "toggle",
					name = L["Use focus target"],
					desc = L["Shows threat on focus target, or focus target's target, when available."],
					get = function() return Skada.db.profile.modules.threatfocustarget end,
					set = function() Skada.db.profile.modules.threatfocustarget = not Skada.db.profile.modules.threatfocustarget end,
					order=2,
				},

			},
		}
	}

	function mod:OnInitialize()
		-- Add our options.
		table.insert(Skada.options.plugins, opts)
	end

	function mod:OnEnable()
		mod.metadata = {showspots = 1, wipestale = 1, columns = {Threat = true, TPS = false, Percent = true}}

		-- Add our feed.
		Skada:AddFeed(L["Threat: Personal Threat"], function()
									if Skada.current and UnitExists("target") then
										local isTanking, status, threatpct, rawthreatpct, threatvalue = UnitDetailedThreatSituation("player", "target")
										if threatpct then
											return ("%02.1f%%"):format(threatpct)
										end
									end
								end)

		-- Enable us
		Skada:AddMode(self)
	end

	function mod:OnDisable()
		Skada:RemoveMode(self)
	end

	local maxthreat = 0

	-- Used as index for dataset.
	local nr = 1

	-- Max threat value.
	local max = 0

	local function add_to_threattable(win, name, target)
		if name and UnitExists(name) then
			local isTanking, status, threatpct, rawthreatpct, threatvalue = UnitDetailedThreatSituation(name, target)

			if Skada.db.profile.modules.threatraw then
				if threatvalue then

					local d = win.dataset[nr] or {}
					win.dataset[nr] = d
					d.label = name
					local _, class = UnitClass(name)
					d.class = class
					d.id = name
					d.threat = threatvalue
					d.isTanking = isTanking
					if threatvalue < 0 then
						-- Show real threat.
						d.value = threatvalue + 410065408
						d.threat = threatvalue + 410065408
					else
						d.value = threatvalue
					end

					if threatvalue > maxthreat then
						maxthreat = threatvalue
					end
				end
			else
				if threatpct then
					local d = win.dataset[nr] or {}
					win.dataset[nr] = d
					d.label = name
					local _, class = UnitClass(name)
					d.class = class
					d.id = name
					d.value = threatpct
					d.isTanking = isTanking
					d.threat = threatvalue

				end
			end

			nr = nr + 1
		end
	end

	local function format_threatvalue(value)
		if value == nil then
			return "0"
		elseif value >= 100000 then
			return ("%2.1fk"):format(value / 100000)
		else
			return ("%d"):format(value / 100)
		end
	end

	local function getTPS(threatvalue)
		if Skada.current then
			local totaltime = time() - Skada.current.starttime

			return format_threatvalue(threatvalue / math.max(1,totaltime))
		else
			-- If we are not in combat and have no active set, we are screwed, since we have no time reference.
			return "0"
		end
	end

	local last_warn = time()

	function mod:Update(win, set)
		local target = nil
		if UnitExists("target") and not UnitIsFriend("player", "target") then
			target = "target"
		elseif Skada.db.profile.modules.threatfocustarget and UnitExists("focus") and not UnitIsFriend("player", "focus") then
			target = "focus"
		elseif Skada.db.profile.modules.threatfocustarget and UnitExists("focustarget") and not UnitIsFriend("player", "focustarget") then
			target = "focustarget"
		elseif UnitExists("target") and UnitIsFriend("player", "target") and UnitExists("targettarget") and not UnitIsFriend("player", "targettarget") then
			target = "targettarget"
		end

		if target then
			-- Set window title.
			win.metadata.title = UnitName(target)

			-- Reset our counter which we use to keep track of current index in the dataset.
			nr = 1

			-- Reset out max threat value.
			maxthreat = 0

			local type, count = Skada:GetGroupTypeAndCount()
			if count > 0 then
				for i = 1, count, 1 do
					local name = UnitName(("%s%d"):format(type, i))
					if name then
						add_to_threattable(win, name, target)

						local unit = ("%s%dpet"):format(type, i)
						if UnitExists(unit) then
							add_to_threattable(win, UnitName(unit), target)
						end
					end
				end
			end

			if type ~= "raid" then
				-- Add ourself because we're in a party or alone.
				add_to_threattable(win, UnitName("player"), target)

				-- Maybe we have a pet?
				if UnitExists("pet") then
					add_to_threattable(win, UnitName("pet"), target)
				end
			end

			-- If we are going by raw threat we got the max threat from above; otherwise it's always 100.
			if not Skada.db.profile.modules.threatraw then
				maxthreat = 100
			end

			win.metadata.maxvalue = maxthreat

			local we_should_warn = false

			-- We now have a a complete threat table.
			-- Now we need to add valuetext.
			for i, data in ipairs(win.dataset) do
				if data.id then

					if data.threat and data.threat > 0 then
						-- Warn if this is ourselves and we are over the treshold.
						local percent = data.value / math.max(0.000001, maxthreat) * 100
						if data.label == UnitName("player") then
							if Skada.db.profile.modules.threattreshold and Skada.db.profile.modules.threattreshold < percent and (not data.isTanking or not Skada.db.profile.modules.notankwarnings) then
								we_should_warn = true
							end
						end

						data.valuetext = Skada:FormatValueText(
														format_threatvalue(data.threat), self.metadata.columns.Threat,
														getTPS(data.threat), self.metadata.columns.TPS,
														string.format("%02.1f%%", percent), self.metadata.columns.Percent
													)
					else
						data.id = nil
					end

				end
			end

			-- Warn
			if we_should_warn and time() - last_warn > 2 then
				if Skada.db.profile.modules.threatflash then
					self:Flash()
				end
				if Skada.db.profile.modules.threatshake then
					self:Shake()
				end
				if Skada.db.profile.modules.threatsound then
					PlaySoundFile(media:Fetch("sound", Skada.db.profile.modules.threatsoundname))
				end

				last_warn = time()
			end
		else
			win.metadata.title = self:GetName()
		end
	end

	-- Shamelessly copied from Omen - thanks!
	function mod:Flash()
		if not self.FlashFrame then
			local flasher = CreateFrame("Frame", "SkadaThreatFlashFrame")
			flasher:SetToplevel(true)
			flasher:SetFrameStrata("FULLSCREEN_DIALOG")
			flasher:SetAllPoints(UIParent)
			flasher:EnableMouse(false)
			flasher:Hide()
			flasher.texture = flasher:CreateTexture(nil, "BACKGROUND")
			flasher.texture:SetTexture("Interface\\FullScreenTextures\\LowHealth")
			flasher.texture:SetAllPoints(UIParent)
			flasher.texture:SetBlendMode("ADD")
			flasher:SetScript("OnShow", function(self)
				self.elapsed = 0
				self:SetAlpha(0)
			end)
			flasher:SetScript("OnUpdate", function(self, elapsed)
				elapsed = self.elapsed + elapsed
				if elapsed < 2.6 then
					local alpha = elapsed % 1.3
					if alpha < 0.15 then
						self:SetAlpha(alpha / 0.15)
					elseif alpha < 0.9 then
						self:SetAlpha(1 - (alpha - 0.15) / 0.6)
					else
						self:SetAlpha(0)
					end
				else
					self:Hide()
				end
				self.elapsed = elapsed
			end)
			self.FlashFrame = flasher
		end

		self.FlashFrame:Show()
	end

	-- Shamelessly copied from Omen (which copied from BigWigs) - thanks!
	function mod:Shake()
		local shaker = self.ShakerFrame
		if not shaker then
			shaker = CreateFrame("Frame", "SkadaThreatShaker", UIParent)
			shaker:Hide()
			shaker:SetScript("OnUpdate", function(self, elapsed)
				elapsed = self.elapsed + elapsed
				local x, y = 0, 0 -- Resets to original position if we're supposed to stop.
				if elapsed >= 0.8 then
					self:Hide()
				else
					x, y = random(-8, 8), random(-8, 8)
				end
				if WorldFrame:IsProtected() and InCombatLockdown() then
					if not shaker.fail then
						shaker.fail = true
					end
					self:Hide()
				else
					WorldFrame:ClearAllPoints()
					for i = 1, #self.originalPoints do
						local v = self.originalPoints[i]
						WorldFrame:SetPoint(v[1], v[2], v[3], v[4] + x, v[5] + y)
					end
				end
				self.elapsed = elapsed
			end)
			shaker:SetScript("OnShow", function(self)
				-- Store old worldframe positions, we need them all, people have frame modifiers for it
				if not self.originalPoints then
					self.originalPoints = {}
					for i = 1, WorldFrame:GetNumPoints() do
						tinsert(self.originalPoints, {WorldFrame:GetPoint(i)})
					end
				end
				self.elapsed = 0
			end)
			self.ShakerFrame = shaker
		end

		shaker:Show()
	end
end)

