accentColor = colors.gray 
buttonColor = colors.lightGray
backgroundColor = colors.black

function round(n)
    return n % 1 >= 0.5 and math.ceil(n) or math.floor(n)
end

width, height = term.getSize()
centerWidth = round(width / 2)
centerHeight = round(width / 2)
peripherals = peripheral.getNames()
playing = false
if #peripherals < 0 then
	print "No drive"
else
	driveCount = 0
	for n = 1, #peripherals do
		local driveCheck = peripherals[n]
		if peripheral.getType(driveCheck) == "drive" then
			drive = driveCheck
			driveCount = driveCount + 1
		end
	end
	if driveCount > 1 then
		print("Too many disk drives. Specify where the disk drive is by running Rhythmblock with the argument")
		os.exit()
	end
end

defaultStatus = "Rhythmblock 0.0.1a"
invalidFormatStatus = "Not a music disc"
noDiscStatus = "No disc"
notPlayingStatus ="No disc playing"
noDiscInDriveStatus = "No disc in drive"
status = defaultStatus

function playDisc()

	if disk.isPresent(drive) and disk.hasAudio(drive) then
        	disk.playAudio(drive)
		status = disk.getAudioTitle(drive)
		playing = true
	elseif disk.isPresent(drive) then
        	status = "Not a music disc"
	else
        	print("No disc")
	end
end

function ejectDisc()
	disk.eject()
end

function stopDisc()
	if playing == true then
		disk.stopAudio()
		playing = 0
		status = defaultStatus
	else
		status = "No disc is playing"
	end	
end

function renderPlayButton()
	paintutils.drawFilledBox(centerWidth - 3, centerHeight - 4, centerWidth + 2, centerHeight + 2, accentColor)
	paintutils.drawLine(centerWidth - 2, centerHeight - 3, centerWidth - 2, centerHeight + 1, buttonColor)
	paintutils.drawLine(centerWidth - 1, centerHeight - 2, centerWidth - 1, centerHeight, buttonColor)
	paintutils.drawPixel(centerWidth + 1, centerHeight) 
end

renderPlayButton()