-- Indicator class


local Indicator = {}
Indicator.all = {}

function Indicator:new(newIndicator)
	local newIndicator = newIndicator or {}
	
	-- Properties
	newIndicator.time = newIndicator.time or 1
	newIndicator.position = newIndicator.position or Vector3.new()
	newIndicator.radius = newIndicator.radius or 100
	
	newIndicator.timeCreated = tick()
	newIndicator.timeExpire = tick() + newIndicator.time
	newIndicator.alive = true
	
	newIndicator.frame = frTemplate:clone()
	newIndicator.frame.Parent = gui
	newIndicator.frame.Archivable = false
	
	setmetatable(newIndicator, Indicator)
	self.__index = self
	table.insert(Indicator.all, newIndicator)
	
	newIndicator:update()
	
	return newIndicator
end

function Indicator:expire()
	self.alive = false
	
	-- Cleanup resources
	self.frame:Destroy()
	
	-- Remove from all
	for i = 1, #Indicator.all do
		if self == Indicator.all[i] then
			table.remove(Indicator.all, i)
			break
		end
	end
end

function Indicator:setAngle(angleRadians)
	assert(self, "use colon")
	if not self.alive then return end
	
	local angleDegrees = angleRadians * (180 / math.pi)
	self.frame.Position = UDim2.new(
			.5,
			math.cos(angleRadians) * self.radius + self.frame.AbsoluteSize.X / -2,
			.5,
			math.sin(angleRadians) * self.radius + self.frame.AbsoluteSize.Y / -2
		)
	self.frame.Rotation = angleDegrees + 90
end

function Indicator:update()
	if tick() >= self.timeExpire then
		self:expire()
	else
		local perc = (tick() - self.timeCreated) / self.time
		self:setAngle(getCameraAngle(camera) - angleBetweenPoints(camera.Focus.p, self.position) - math.pi / 2)

		self.frame.ImageLabel.ImageTransparency = perc
		self.frame.ImageLabel.Size = UDim2.new(0, 50, 0, -50 * (1 - perc))
	end
end

function Indicator:updateAll()
	local i = 1
	while i <= #Indicator.all do
		local indicator = Indicator.all[i]
		indicator:update()
		if indicator.alive then
			i = i + 1
		end
	end
end
