local mineHeight = 0;
local run = true;
local currentRotation = 0
local currentYPosition = 0
local currentZPosition = 0

local oldYPosition = 0
local oldZPosition = 0
local oldRotation = 0



function turnLeft()
    currentRotation = currentRotation - 1;
    turtle.turnLeft()
end


function turnRight()
    currentRotation = currentRotation + 1;
    turtle.turnRight()
end


function dig()
    print("Digging! " .. " Y: " .. currentYPosition .. " Z: " .. currentZPosition .. " Rotation: " .. currentRotation)
    if turtle.getItemCount(16) == 0 then
        turtle.dig()
    else
        returnToHome()
        deposit()
        returnToOldPosition()
    end
end


function digUp()
    if turtle.getItemCount(16) == 0 then
        turtle.digUp()
    else
        returnToHome()
        deposit()
        returnToOldPosition()
    end
end


function digDown()
    if turtle.getItemCount(16) == 0 then
        turtle.digDown()
    else
        returnToHome()
        deposit()
        returnToOldPosition()
    end
end


function oddLevelDig()
    dig()
    turnRight()
    dig()
    turnRight()
    dig()
end


function evenLevelDig()
    dig()
    turnLeft()
    dig()
    turnLeft()
    dig()
end


function turnStraight()
    print("Turning straight")
    if currentRotation > 0 then
        repeat
            turnLeft()
        until currentRotation == 0
    else
        repeat
            turnRight()
        until currentRotation == 0
    end
end


function turnBackwards()
    print("Turning backwards")
    if currentRotation > 0 then
        repeat
            turnRight()
        until currentRotation == 2
    else
        repeat
            turnLeft()
        until currentRotation == -2
    end
end


function returnToHome()
    turnBackwards()

    for i = 1, currentZPosition do
        turtle.forward()
    end

    for i = 1, currentYPosition do
        turtle.down()
    end
end


function deposit()
    for i = 1, 16 do
        turtle.select(i)
        turtle.drop()
    end
    turtle.select(1)
end


function returnToOldPosition()
    turnStraight()

    for i = 1, currentZPosition do
        turtle.forward()
    end

    for i = 1, currentYPosition do
        turtle.up()
    end
end



write("Mine Height: ")
mineHeight = tonumber(read());

turtle.select(1)
turtle.refuel()



while run do
    turnLeft()

    for i = 1, mineHeight do
        print("Starting to mine at height: " .. i)

        if i % 2 == 1 then
            oddLevelDig()
        else
            evenLevelDig()
        end

        if i ~= mineHeight then
            digUp()
            turtle.up()
            currentYPosition = currentYPosition + 1
        end
    end

    turnStraight()
    turtle.forward()
    currentZPosition = currentZPosition + 1
    turnLeft()

    for i = mineHeight, 1, -1 do
        print("Starting to mine at height: " .. i)

        if i % 2 == 1 then
            oddLevelDig()
        else
            evenLevelDig()
        end

        if i ~= 1 then
            digDown()
            turtle.down()
            currentYPosition = currentYPosition - 1
        end

    end

    turnStraight()
    turtle.forward()
    currentZPosition = currentZPosition + 1
end

--loadstring(http.get("https://pastebin.com/raw/f6CQKKwP").readAll())()