local args = {...}

local function isEmpty(val)
    return val == nil or val == ""
end

local function log(val)
    write(val .. "\n")
end

local function validate(x, z, y)
    if x > 100 or z > 100 or y > 100 then
        log("Vc vai fazer merda mano. Não vou deixar mais do que 100.")
        return false
    end

    return true
end

local function refuel()
    for i = 1, 16 do
        turtle.select(i)
        if turtle.refuel() then
            log("Recarreguei, que delícia cara.")
            return true
        end
    end
    return false
end

local function checkFuel()
    if turtle.getFuelLevel() < 1000 then
        log("Quase sem gasosa, tentando recarregar.")
        while not refuel()
        do
            os.sleep(3)
        end
    end
    return true
end

local function digForward()
    repeat
        turtle.dig()
    until turtle.forward()
end

local function start()
    local x = tonumber(args[1])
    local z = tonumber(args[2])
    local y = tonumber(args[3])

    if not validate(x, z, y) then
        return
    end

    local turnRight = true

    for curY = 1, y do
        for curX = 1, x do
            for curZ = 1, z - 1 do
                checkFuel()
                digForward()
            end

            if curX ~= x then
                if turnRight then
                    turtle.turnRight()
                    digForward()
                    turtle.turnRight()
                else
                    turtle.turnLeft()
                    digForward()
                    turtle.turnLeft()
                end
                turnRight = not turnRight
            end
        end

        if curY ~= y then
            turtle.digDown()
            turtle.down()
            turtle.turnRight()
            turtle.turnRight()
        end
    end
end

start()