local HUD = nil
local icon_mode = stealth_mcm.get_config("icon_type") or 1

function reset_hud()
	deactivate_hud()
	activate_hud()
end

function deactivate_hud()
	
	if HUD ~= nil then
		get_hud():RemoveDialogToRender(HUD)
		HUD = nil
	end
	
	UnregisterScriptCallback("actor_on_net_destroy", deactivate_hud)
	UnregisterScriptCallback("actor_on_before_death", deactivate_hud)
	
end

function activate_hud()
	
	RegisterScriptCallback("actor_on_net_destroy", deactivate_hud)
	RegisterScriptCallback("actor_on_before_death", deactivate_hud)
	
	if HUD == nil then
		HUD = StealthIcon()
		get_hud():AddDialogToRender(HUD)
	end
	
end

function upd_hud()
	-- enable/disable icon
	if stealth_mcm.get_config("icon") then
		activate_hud()
	else
		deactivate_hud()
	end

	-- if icon enabled then update its type
	if HUD ~= nil then
		icon_mode = stealth_mcm.get_config("icon_type")
		reset_hud()
	end

end

function on_game_start()
	RegisterScriptCallback("actor_on_first_update", upd_hud)
	RegisterScriptCallback("on_option_change", upd_hud)
end

---------------------------------------- HUD -------------------------------------------------------

class "StealthIcon" (CUIScriptWnd)

function StealthIcon:__init() super()
	
	self.xml	= CScriptXmlInit()
	self.xml:ParseFile("ui_light_gem.xml")
	
	self:InitControls()
	
end

function StealthIcon:InitControls()
	
	local xml = self.xml
	
	if icon_mode == 1 then
		self.gem = xml:InitStatic("gem", self)
	elseif icon_mode == 2 then
		self.gem = xml:InitProgressBar("gem_bar", self)
	end
	
end

function StealthIcon:Update()
	CUIScriptWnd.Update(self)

	self.gem:Show(main_hud_shown())

	local xx = stealth_mcm.get_config("icon_x")
	local yy = stealth_mcm.get_config("icon_y")
	self.gem:SetWndPos(vector2():set(xx, yy))
	
	if icon_mode == 1 then
		self:StatUpd()
	elseif icon_mode == 2 then
		self:BarUpd()
	end
	
end

function StealthIcon:StatUpd()
	local TINT_MAX = 245
	local LUM_MULT = 1  -- multiplier applied to the luminosity value, higher generaly means lighter. too high and the gem won't get dark, to low and it won't get light. 
	-- both of these can be set from the debug menue. f7->0 light_gem.LUM_MULT = 1.9 into the execute text box then hit execute button. (typos will crash the game)
	local FLASHLIGHT_PENALTY = .3 --flat value to make the gem jump as a reminder that you should shut off the light.
	
	local gem_lum = visual_memory_manager.icon_lum()
	local torch = db.actor:item_in_slot(10)
	local flash = db.actor:item_in_slot(9)

	if (torch and torch:torch_enabled()) then
		gem_lum = gem_lum + FLASHLIGHT_PENALTY --flat value to make the gem jump as a reminder that you should shut off the light
	elseif (flash and (flash:section() == "device_flashlight") and db.actor:active_detector()) then
		gem_lum = gem_lum + FLASHLIGHT_PENALTY --flat value to make the gem jump as a reminder that you should shut off the light
	end
	
	local val = TINT_MAX - clamp(TINT_MAX * LUM_MULT * gem_lum, 0, TINT_MAX)

	local gem_color = GetARGB(255,255-val,255-val,255-val)
	self.gem:SetTextureColor(gem_color)

end

function StealthIcon:BarUpd()
	local gem_val = math.floor(visual_memory_manager.stealth_light_ind[1] * 100 + 0.5)
	local in_danger = visual_memory_manager.stealth_light_ind[2]

	self.gem:SetProgressPos(gem_val)

	local gem_color_white = GetARGB(255, 255, 255, 255)
	local gem_color_yellow = GetARGB(255, 255, 255, 0)
	local gem_color_red = GetARGB(255, 255, 0, 0)

	if gem_val >= 100 then
		self.gem:SetColor(gem_color_red)
	elseif in_danger then
		self.gem:SetColor(gem_color_yellow)
	else
		self.gem:SetColor(gem_color_white)
	end

end

function StealthIcon:__finalize()
end