local prefix = "[Carlos 0.1a] "


-- Funcao printf
local function printf(...) print(string.format(...)) end

-- Funcao combustivel
local function combustivel()
    local restante = turtle.getFuelLevel() -- Combustivel restante
    local suficiente = false

    while true do
        if restante == 0 then
            suficiente = false
            printf("%s Sem combustivel restante, tentando reabastecer.", prefix)
            for i = 1, 16 do
                turtle.select(i)
                if turtle.refuel(0) then
                    local halfStack = math.ceil(turtle.getItemCount(i)/2)
                    turtle.refuel(halfStack)
                    break
                end
            end
        else
            printf("%s Combustivel restante: %s", prefix, restante)
            suficiente = true
            break
        end

    return suficiente

end

local function minerar()
    local possivel = combustivel()
    if possivel then
        turtle.dig()
        turtle.forward()
    else
        printf("%s Sem combustivel.", prefix)
    end

end

minerar()