local side
local args = {...}
if #args >= 1 then
    if args[1] == "top" then side = args[1]
    elseif args[1] == "bottom" then side = args[1]
    elseif args[1] == "left" then side = args[1]
    elseif args[1] == "right" then side = args[1]
    elseif args[1] == "front" then side = args[1]
    elseif args[1] == "back" then side = args[1]
    else side = nil
    end
end
 
function findSide()
	local side
	if(peripheral.isPresent("top")) then 
		if(peripheral.getType("top") == "drive") then 
			side = "top" 
		end
	elseif(peripheral.isPresent("bottom")) then 
		if(peripheral.getType("bottom") == "drive") then 
			side = "bottom"
		end
	elseif(peripheral.isPresent("left")) then 
		if(peripheral.getType("left") == "drive") then 
			side = "left" 
		end 
	elseif(peripheral.isPresent("right")) then 
		if(peripheral.getType("right") == "drive") then 
			side = "right" 
		end
	elseif(peripheral.isPresent("front")) then 
		if(peripheral.getType("front") == "drive") then 
			side = "front" 
		end
	elseif(peripheral.isPresent("back")) then 
		if(peripheral.getType("back") == "drive") then
			side = "back" 
		end
	else 
		print("Please attach a drive to the system")
		side = nil
	end
	return side
end

function diskPresent()
	if disk.hasAudio(findSide()) then return true
	else return false 
	end
end

function enterDisk()
	while not diskPresent() do
		print("Please insert a disk")
		for i = 40,0,-1 do
			if diskPresent() then break end
            sleep(0.25)
        end
	end
	return true
end

function play()
	shell.run("clear")
	print("Now playing ",disk.getAudioTitle(findSide()))
    disk.playAudio(findSide())
end

function getLength()
	local length
	if(disk.getAudioTitle(findSide()) == "C418 - ward") then length = 251
	elseif(disk.getAudioTitle(findSide()) == "C418 - 11") then length = 77
	elseif(disk.getAudioTitle(findSide()) == "C418 - 13") then length = 118
	elseif(disk.getAudioTitle(findSide()) == "wait") then length = 238
	elseif(disk.getAudioTitle(findSide()) == "C418 - stal") then length = 150
	elseif(disk.getAudioTitle(findSide()) == "C418 - cat") then length = 185
	elseif(disk.getAudioTitle(findSide()) == "C418 - blocks") then length = 345
	elseif(disk.getAudioTitle(findSide()) == "C418 - chirp") then length = 185
	elseif(disk.getAudioTitle(findSide()) == "C418 - far") then length = 174
	elseif(disk.getAudioTitle(findSide()) == "C418 - mall") then length = 197
	elseif(disk.getAudioTitle(findSide()) == "C418 - mellohi") then length = 96
	elseif(disk.getAudioTitle(findSide()) == "C418 - strad") then length = 188
    else length = nil
	end
	return length
end

play()