local floor = floor
local min = min
local UnitExists = UnitExists
local GetPlayerMapPosition = GetPlayerMapPosition
local UnitHealth = UnitHealth

local f = CreateFrame ("frame", "Hansgar_And_Franzok_Assist", UIParent)
f:SetFrameStrata ("DIALOG")

f:SetSize (155, 156)
f:SetBackdrop ({bgFile = "Interface\\Tooltips\\UI-Tooltip-Background", tile = true, tileSize = 16, insets = {left = -1, right = -1, top = -1, bottom = -1},
edgeFile = "Interface\\AddOns\\Hansgar_And_Franzok_Assist\\border_2", edgeSize = 8})
f:SetPoint ("center", UIParent, "center")
f:SetBackdropColor (0, 0, 0, 0)
f:SetBackdropBorderColor (0, 0, 0, 1)
f:SetMovable (true)
f:EnableMouse (true)
f:Hide()

local title = f:CreateFontString (nil, "overlay", "GameFontNormal")
title:SetText ("Hansgar & Franzok Assist")
title:SetPoint ("center", f, "center")
title:SetPoint ("bottom", f, "top", 0, 2)

--
local frame_event = CreateFrame ("frame", "Hansgar_And_Franzok_AssistEvents", f)
frame_event:RegisterEvent ("ENCOUNTER_START")
frame_event:RegisterEvent ("ENCOUNTER_END")
frame_event:RegisterEvent ("ADDON_LOADED")

--
local player_bar = CreateFrame ("statusbar", "Hansgar_And_Franzok_AssistPlayerBar", f)
player_bar:SetPoint ("topleft", f, "bottomleft", 0, -3)
player_bar:SetPoint ("topright", f, "bottomright", 0, -3)
player_bar:SetHeight (14)
player_bar:SetStatusBarColor (0, 0, 0, 0)
player_bar:SetMinMaxValues (0, 100)
player_bar:SetValue (0)
f.player_bar = player_bar

player_bar.texture = player_bar:CreateTexture (nil, "overlay")
player_bar.texture:SetTexture ("Interface\\AddOns\\Hansgar_And_Franzok_Assist\\bar_skyline")
player_bar:SetStatusBarTexture (player_bar.texture)

--

local db

frame_event:SetFrameStrata ("FULLSCREEN")

frame_event:SetScript ("OnEvent", function (self, event, ...)

	if (event == "ADDON_LOADED" and select (1, ...) == "Hansgar_And_Franzok_Assist") then

		db = Hansgar_And_Franzok_DB
		if (not db) then
			db = {}
			Hansgar_And_Franzok_DB = db
		end
		db.STAMPERS_DELAY = db.STAMPERS_DELAY or 5
		
		SLASH_Hansgar_And_Franzok_Assist1, SLASH_Hansgar_And_Franzok_Assist2 = "/hansgar", "/franzok"
		function SlashCmdList.Hansgar_And_Franzok_Assist (msg, editbox)
		
			local command, rest = msg:match ("^(%S*)%s*(.-)$")
		
			if (command == "delay") then
				local t = tonumber (rest)
				if (t) then
					db.STAMPERS_DELAY = t
					print ("|cFFFFAA00Hansgar and Franzok Assist|r delay set to: ", t)
				else
					print ("|cFFFFAA00Hansgar and Franzok Assist|r invalid time.", t)
				end
				
			elseif (command == "test" or command == "show") then
				if (f.StampersPhase) then
					return f:StopTracking()
				end
				f:StartTracking()
				
			elseif (command == "hide") then
				if (f.StampersPhase) then
					return f:StopTracking()
				end

			else
				print ("|cFFFFAA00Hansgar and Franzok Assist|r Commands:")
				print ("|cFFFFFF00/hansgar delay <time>|r: time in seconds until the percentage goes from 0 to 100.")
				print ("|cFFFFFF00/hansgar test|r: active the addon on test mode.")
				print ("|cFFFFFF00/hansgar show|r: show the window and start test mode.")
				print ("|cFFFFFF00/hansgar hide|r: hide the window.")
			end
		end
		
	elseif (event == "ENCOUNTER_START" or event == "ENCOUNTER_END") then
	
		local encounterID, encounterName, difficultyID, raidSize = select (1, ...)
		if (encounterID == 1693 and difficultyID == 16) then
		
			if (event == "ENCOUNTER_START") then
			
				print ("|cFFFFAA00Hansgar and Franzok Assist|r: addon enabled, good look!")
			
				if (f.StampersPhase) then
					f:StopTracking()
				end
				f:RegisterEvent ("COMBAT_LOG_EVENT_UNFILTERED")
				
			elseif (event == "ENCOUNTER_END") then
				f:UnregisterEvent ("COMBAT_LOG_EVENT_UNFILTERED")
				
				if (f.StampersPhase) then
					f:StopTracking()
				end
			end
		end
	end

end)

--

f:SetScript ("OnEvent", function (self, event, time, token, _, who_serial, who_name, who_flags, _, target_serial, target_name, target_flags, _, spellid, spellname, spellschool, buff_type, ...)

	if (event == "SPELL_AURA_APPLIED" and spellid == 162124 and not f.StampersPhase) then
		f:StartTracking()
		
	elseif (event == "SPELL_AURA_REMOVED" and spellid == 162124 and f.StampersPhase) then
		f:StopTracking()
		
	end

end)

local frame_tracker = CreateFrame ("frame", "Hansgar_And_Franzok_AssistTracker", UIParent)
local on_update_tracker = function (self, elapsed)
	
	for i = 1, GetNumGroupMembers() do
		local x, y = GetPlayerMapPosition ("raid"..i)
		if (UnitExists ("raid"..i) and UnitHealth ("raid"..i) > 1 and x and y) then
			local block = f:WhichBlock (x, y)
			if (block) then
				if (not f.block_tracker [block]) then --> was a clear block
					f.block_tracker [block] = GetTime()
					f:Paint (f.all_blocks [block])
				end
			end
		end
	end
	
	local px, py = GetPlayerMapPosition ("player")
	local player_block = f:WhichBlock (px, py)
	if (player_block) then
		
		local time_limit_at = f.block_tracker [player_block] + db.STAMPERS_DELAY
		local time_now = GetTime()
		
		f.player_bar:SetValue ((time_limit_at - time_now) / db.STAMPERS_DELAY * 100)
		f.player_bar:Show()
		
		local block_frame = f.all_blocks [player_block]
		f.player_loc_box:SetPoint ("center", block_frame, "center")
		f.player_loc_box:Show()
		player_bar:Show()
	else
		f.player_loc_box:Hide()
		f.player_bar:Hide()
	end
end

function f:StartTracking()

	print ("|cFFFFAA00Hansgar and Franzok Assist|r: Smart Stampers phase started.")

	f.StampersPhase = true

	if (not f.frames_built) then
		f:CreateWindow()
	end
	
	f:ResetBlocks()
	f.player_loc_box:Hide()

	f.block_tracker = f.block_tracker or {}
	table.wipe (f.block_tracker)
	
	SetMapToCurrentZone()
	
	frame_tracker:SetScript ("OnUpdate", on_update_tracker)
	f:Show()
end

function f:StopTracking()

	print ("|cFFFFAA00Hansgar and Franzok Assist|r: Smart Stampers phase ended.")

	f.StampersPhase = false
	frame_tracker:SetScript ("OnUpdate", nil)
	table.wipe (f.block_tracker)
	f.player_loc_box:Hide()
	f:Hide()
end

local on_mouse_down = function (self)
	if (not self.isMoving) then
		self.isMoving = true
		f:StartMoving()
	end
end
local on_mouse_up = function (self)
	if (self.isMoving) then
		self.isMoving = nil
		f:StopMovingOrSizing()
	end
end

local painting = function (self, elapsed)
	self.step = self.step + elapsed
	self.total_time = self.total_time + elapsed
	
	if (self.step > 0.2) then
		self.step = 0
		local percent = self.total_time / db.STAMPERS_DELAY * 100
		
		percent = min (percent, 100)
		
		local r, g, b = f:percent_color (percent, true)
		self:SetBackdropColor (r, g, b, 0.5)
		
		self.number:SetText (floor (percent) .. "%")
		self.number:SetTextColor (1, 1, 1, 1)
		
		if (percent == 100) then
			self:SetScript ("OnUpdate", nil)
			self.stamper_icon:Show()
			self.number:Hide()
		end
	end
end
function f:Paint (block)
	block.step = 0
	block.total_time = 0
	block:SetScript ("OnUpdate", painting)
end

function f:ResetBlocks()
	for _, block in ipairs (f.all_blocks) do
		block:SetScript ("OnUpdate", nil)
		block:SetBackdropColor (.8, .8, .8, 0.5)
		block.number:SetText (block.id)
		block.number:SetTextColor (1, 1, 1, 0.5)
		block.number:Show()
		block.stamper_icon:Hide()
	end
end

function f:CreateWindow()
	local x = 0
	local y = 0
	
	f.player_loc_box = frame_event:CreateTexture (nil, "overlay")
	f.player_loc_box:SetSize (32, 40)
	f.player_loc_box:SetTexture ([[Interface\ContainerFrame\UI-Icon-QuestBorder]])
	f.player_loc_box:Hide()
	
	f.all_blocks = {}
	
	for i = 1, 20 do
		
		local block = CreateFrame ("frame", "Hansgar_And_Franzok_Assist_Block" .. i, f)
		block:SetSize (30, 38)
		block:SetBackdrop ({bgFile = "Interface\\Tooltips\\UI-Tooltip-Background", tile = true, tileSize = 16, insets = {left = 0, right = 0, top = 0, bottom = 0},
		})
		block:SetBackdropBorderColor (0, 0, 0, 1)
		block:SetBackdropColor (.8, .8, .8, 0.5)
		block:SetPoint ("TopLeft", f, "TopLeft", x, y)
		
		block:SetScript ("OnMouseDown", on_mouse_down)
		block:SetScript ("OnMouseUp", on_mouse_up)
		
		block.id = i
		
		local number = block:CreateFontString (nil, "artwork", "GameFontHighlight")
		number:SetPoint ("center", block, "center")
		number:SetText (i)
		number:SetTextColor (1, 1, 1, 0.5)
		block.number = number
		
		local stamper_icon = block:CreateTexture (nil, "overlay")
		stamper_icon:SetTexture ([[Interface\ICONS\Warrior_talent_icon_LambsToTheSlaughter]])
		stamper_icon:SetTexCoord (4/64, 60/64, 4/64, 60/64)
		stamper_icon:SetSize (24, 24)
		stamper_icon:SetPoint ("center", block, "center")
		stamper_icon:Hide()
		block.stamper_icon = stamper_icon
		
		x = x + 31
		if (x >= 155) then
			x = 0
			y = y - 40
		end
		
		tinsert (f.all_blocks, block)
		
	end
	
	f.frames_built = true
	
end

local locs = {
	--block 1:
	{x1 = 0.51104891300201, y1 = 0.70877063274384, x2 = 0.50024521350861, y2 = 0.73220580816269},
	--block 2:
	{x1 = 0.49676024913788, y1 = 0.70914703607559, x2 = 0.48485481739044, y2 = 0.73210543394089},
	--block 3:
	{x1 = 0.48142266273499, y1 = 0.70876735448837, x2 = 0.46925610303879, y2 = 0.73205661773682},
	--block 4:
	{x1 = 0.46603119373322, y1 = 0.70929777622223, x2 = 0.45397216081619, y2 = 0.73167610168457},
	--block 5:
	{x1 = 0.45079308748245, y1 = 0.70926278829575, x2 = 0.43927478790283, y2 = 0.73225915431976},

	--block 6
	{x1 = 0.51104187965393, y1 = 0.73422884941101, x2 = 0.49990028142929, y2 = 0.76343530416489},
	--block 7
	{x1 = 0.49673527479172, y1 = 0.73338270187378, x2 = 0.48483556509018, y2 = 0.76356953382492},
	--block 8
	{x1 = 0.48133307695389, y1 = 0.73373115062714, x2 = 0.46920585632324, y2 = 0.76366758346558},
	--block 9
	{x1 = 0.46568286418915, y1 = 0.73440700769424, x2 = 0.45381307601929, y2 = 0.76358675956726},
	--block 10
	{x1 = 0.45046973228455, y1 = 0.73361301422119, x2 = 0.43929302692413, y2 = 0.76388084888458},

	--block 11
	{x1 = 0.51104211807251, y1 = 0.76532691717148, x2 = 0.50021582841873, y2 = 0.79546189308167},
	--block 12
	{x1 = 0.4964514374733, y1 = 0.76603573560715, x2 = 0.48449218273163, y2 = 0.79527854919434},
	--block 13
	{x1 = 0.48101079463959, y1 = 0.76503103971481, x2 = 0.46944016218185, y2 = 0.79543298482895},
	--block 14
	{x1 = 0.46541726589203, y1 = 0.7654857635498, x2 = 0.45369201898575, y2 = 0.79529416561127},
	--block 15
	{x1 = 0.45051556825638, y1 = 0.76583826541901, x2 = 0.43931984901428, y2 = 0.79570162296295},

	--block 16
	{x1 = 0.51103663444519, y1 = 0.79726493358612, x2 = 0.50061076879501, y2 = 0.8241291642189},
	--block 17
	{x1 = 0.49670505523682, y1 = 0.79692482948303, x2 = 0.48469054698944, y2 = 0.82489335536957},
	--block 18
	{x1 = 0.48130965232849, y1 = 0.79742962121964, x2 = 0.46962946653366, y2 = 0.82453238964081},
	--block 19
	{x1 = 0.46575212478638, y1 = 0.79766929149628, x2 = 0.45400339365005, y2 = 0.82176661491394},
	--block 20
	{x1 = 0.45073217153549, y1 = 0.79751670360565, x2 = 0.43945103883743, y2 = 0.82504689693451},
}

function f:WhichBlock (x, y)
	for i = 1, #locs do
		local loc = locs [i]
		if (x >= loc.x2 and x <= loc.x1 and y >= loc.y1 and y <= loc.y2) then
			return i
		end
	end
end

function f:percent_color (value, inverted)
	local r, g
	if (value < 50) then
		r = 255
	else
		r = floor ( 255 - (value * 2 - 100) * 255 / 100)
	end
	
	if (value > 50) then
		g = 255
	else
		g = floor ( (value * 2) * 255 / 100)
	end
	
	if (inverted) then
		return g/255, r/255, 0
	else
		return r/255, g/255, 0
	end
end