cTurtleOS

print("cTurtleOS 1.0")

local args = {...}
local command

function string:split(delimiter)
    local result = { }
    local from = 1
    local delim_from, delim_to = string.find(self, delimiter, from)

    while delim_from do
        table.insert(result, string.sub(self, from, delim_from - 1))
        from = delim_to + 1
        delim_from, delim_to = string.find(self, delimiter, from)
    end

    table.insert(result, string.sub(self, from))
    return result
end

function isNumber(var)
    if (tonumber(var) ~= nil) then
        return true
    else
        return false
    end
end

function printUsage()
    print("Usage: <command> [arguments]")
end

function tryDig()
    while (turtle.detect()) do
        if (turtle.dig()) then
            sleep(0.5)
            return true
        else
            return false
        end
    end
end

function tryDigDown()
    while (turtle.detectDown()) do
        if (turtle.digDown()) then
            sleep(0.5)
            return true
        else
            return false
        end
    end
end

function tryDigUp()
    while (turtle.detectUp()) do
        if (turtle.digUp()) then
            sleep(0.5)
            return true
        else
            return false
        end
    end
end

function tryUp()
    while (not turtle.up()) do
        if (turtle.detectUp()) then
            if (not tryDigUp()) then
                return false
            end
        elseif (turtle.attackUp()) then

        else
            sleep(0.5)
        end
    end
end

function tryDown()
    while (not turtle.down()) do
        if (turtle.detectDown()) then
            if (not tryDigDown()) then
                return false
            end
        elseif (turtle.attackDown()) then

        else
            sleep(0.5)
        end
    end
end

function tryForward()
    while (not turtle.forward()) do
        if (turtle.detect()) then
            if (not tryDig()) then
                return false
            end
        elseif (turtle.attack()) then

        else
            sleep(0.5)
        end
    end
end

function tryRefuel()
    if (turtle.getFuelLevel() ~= "unlimited" and turtle.getFuelLevel() < 1) then
        for i = 1, 16 do
            if (turtle.getItemCount(n) > 0) then
                turtle.select(i)
                if (turtle.refuel(i)) then
                    turtle.select(i)
                    return true
                end
            end
        end
    else
        turtle.select(1)
        return false
    end
end

function strip(depth, width, height)
    for i = 1, depth do
        turtle.placeDown()
        tryRefuel()
        tryDig()
        tryForward()
        turtle.turnLeft()
        tryDig()
        tryUp()
        tryDig()
        tryUp()
        tryDig()
        turtle.turnRight()
        turtle.turnRight()
        tryDig()
        tryDown()
        tryDig()
        tryDown()
        tryDig()
        turtle.turnLeft()
    end
end

function stairs(depth)
    for i = 1, depth do
turtle.placeDown()
        tryRefuel()
        tryDig()
        tryForward()
        turtle.turnLeft()
        tryDig()
        tryForward()
        turtle.turnRight()
        tryUp()
        tryDig()
        tryForward()
        turtle.turnRight()
        tryDig()
        tryForward()
        turtle.turnLeft()
    end
end

if (#args > 0) then
    command = args[1]
    if (command:lower() == "strip") then
        if (#args == 2) then
            if (isNumber(args[2])) then
                strip(args[2], 3, 3)
            else
                print("The depth must be a number")
                terminate()
            end
        else
            terminate()
        end
    elseif (command:lower() == "stairs") then
        if (#args == 2) then
            if (isNumber(args[2])) then
                stairs(args[2])
            else
                print("The depth must be a number")
                terminate()
            end
        else
            terminate()
        end
    end
else
    printUsage()
    terminate()
end