Minecraft Modded - Mining Turtle - Refuel Max From Storage

local TARGET_FUEL = 1000000  -- Stop refueling when this fuel level is reached
local MAX_SLOTS = 16         -- Turtle has 16 inventory slots
local drawerDirection = nil  -- Stores the found drawer position

-- Function to find a storage drawer and store its position
local function findDrawer()
    local directions = {
        {action = "suck", move = function() return turtle.suck() end, turn = nil},
        {action = "suckUp", move = function() return turtle.suckUp() end, turn = nil},
        {action = "suckDown", move = function() return turtle.suckDown() end, turn = nil},
        {action = "suck", move = function() return turtle.suck() end, turn = turtle.turnLeft},
        {action = "suck", move = function() return turtle.suck() end, turn = turtle.turnRight},
        {action = "suck", move = function() return turtle.suck() end, turn = function() turtle.turnLeft(); turtle.turnLeft() end}
    }

    for _, dir in ipairs(directions) do
        if dir.turn then dir.turn() end  -- Turn if needed

        if dir.move() then
            drawerDirection = dir  -- Store the found direction
            print("Storage drawer found! Using " .. dir.action .. " to pull fuel.")
            return true
        end
    end

    return false  -- No drawer found
end

-- Function to pull fuel into all slots before refueling
local function pullFuel()
    if not drawerDirection then
        print("No storage drawer remembered!")
        return false
    end

    print("Filling inventory with fuel...")
    local pulled = false  -- Track if any fuel was pulled
    for slot = 1, MAX_SLOTS do
        turtle.select(slot)
        if drawerDirection.move() then
            pulled = true  -- Fuel was pulled
        end
    end

    return pulled
end

-- Function to refuel all fuel in inventory
local function refuelTurtle()
    print("Refueling...")
    for slot = 1, MAX_SLOTS do
        turtle.select(slot)
        if turtle.refuel() then
            print("Refueled from slot " .. slot .. ". Current fuel level: " .. turtle.getFuelLevel())
        end
    end
end

-- **Stage 1: Locate and Remember Drawer (Only Runs Once)**
if not findDrawer() then
    print("No storage drawer found! Exiting...")
    return
end

-- **Main Loop: Repeat Stages 2-4**
while true do
    -- **Stage 2: Fill inventory with fuel**
    local hasFuel = pullFuel()

    if not hasFuel then
        print("No more fuel available! Exiting...")
        return
    end

    -- **Stage 3: Refuel using all slots**
    refuelTurtle()

    -- **Stage 4: Check if fuel is over 1,000,000**
    if turtle.getFuelLevel() >= TARGET_FUEL then
        break
    end
end

-- Final refuel to use up all remaining fuel
refuelTurtle()

print("Refueling complete! Final fuel level:", turtle.getFuelLevel())