-- @name koptilnya/libs/utils
function checkVarClass(var, class, message)
	if type(var) ~= 'table' or var['class'] == nil or not var:isInstanceOf(class) then
		throw(message == nil and 'Wrong variable class.' or message, 1, true)
	end
end

function accessorFunc(tbl, varName, name, defaultValue)
	tbl[varName] = defaultValue
	tbl['get' .. name] = function(self)
		return self[varName]
	end
	tbl['set' .. name] = function(self, value)
		self[varName] = value
	end
end

function rotateAround(entity, pivot, angles)
	local pos = entity:getPos()
	local localPivotPos = entity:worldToLocal(pivot)

	entity:setAngles(angles)
	pos = pos + (pivot - entity:localToWorld(localPivotPos))
	entity:setPos(pos)
end

function tobase(number, base)
	local ret = ''

	if base < 2 or base > 36 or number == 0 then
		return '0'
	end

	if base == 10 then
		return tostring(number)
	end

	local chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'
	local loops = 0
	while number > 0 do
		loops = loops + 1
		number, d = math.floor(number / base), (number % base) + 1
		ret = string.sub(chars, d, d) .. ret
		if loops > 32000 then
			break
		end
	end
	return ret
end

function bytesToHex(bytes)
	local hex = '0x'

	for _, v in pairs(bytes) do
		hex = hex .. bit.tohex(v, 2)
	end

	return hex
end

function byteTable(str, start, length)
	local result = {}

	for i = 1, length do
		result[i] = string.byte(str, i + start - 1)
	end

	return result
end

function isURL(str)
	local _1, _2, prefix = str:find('^(%w-):')

	return prefix == 'http' or prefix == 'https' or prefix == 'data'
end

function debounce(func, delay)
	local lastCall = 0
	return function(...)
		local now = timer.systime()
		if now - lastCall >= delay then
			lastCall = now
			return func(...)
		end
	end
end