--Dupes a part from the template.

local function MakeFromTemplate(template: BasePart, currentCacheParent: Instance): BasePart
	local part: BasePart = template:Clone()
	-- ^ Ignore W000 type mismatch between Instance and BasePart. False alert.
	
	part.CFrame = CF_REALLY_FAR_AWAY
	part.Anchored = true
	part.TopSurface = Enum.SurfaceType.Smooth
	part.BottomSurface = Enum.SurfaceType.Smooth
	
	--game:GetService("PhysicsService"):SetPartCollisionGroup(part, "Debris")
	part.CanCollide = false
	
	part.Parent = currentCacheParent
	return part
end

function PartCacheStatic.new(template: BasePart, numPrecreatedParts: number?, currentCacheParent: Instance?): PartCache
	local newNumPrecreatedParts: number = numPrecreatedParts or 5
	local newCurrentCacheParent: Instance = currentCacheParent or workspace
	
	--PrecreatedParts value.
	--Same thing. Ensure it's a number, ensure it's not negative, warn if it's really huge or 0.
	assert(numPrecreatedParts > 0, "PrecreatedParts can not be negative!")
	assertwarn(numPrecreatedParts ~= 0, "PrecreatedParts is 0! This may have adverse effects when initially using the cache.")
	assertwarn(template.Archivable, "The template's Archivable property has been set to false, which prevents it from being cloned. It will temporarily be set to true.")
	
	local oldArchivable = template.Archivable
	template.Archivable = true
	local newTemplate: BasePart = template:Clone()
	-- ^ Ignore W000 type mismatch between Instance and BasePart. False alert.
	
	template.Archivable = oldArchivable
	template = newTemplate
	
	local object: PartCache = {
		Open = {},
		InUse = {},
		CurrentCacheParent = newCurrentCacheParent,
		Template = template,
		ExpansionSize = 100
	}
	setmetatable(object, PartCacheStatic)
	
	-- Below: Ignore type mismatch nil | number and the nil | Instance mismatch on the table.insert line.
	for _ = 1, newNumPrecreatedParts do
		table.insert(object.Open, MakeFromTemplate(template, object.CurrentCacheParent))
	end
	object.Template.Parent = nil
	
	return object
	-- ^ Ignore mismatch here too
end
