print("Mining version 2.0.0")

-- Configuration
local ALLOWED_BLOCKS = {
    "minecraft:gravel",
    "minecraft:andesite"
}
local MAX_Y = 70
local FUEL_ITEM = "minecraft:coal" -- Replace with your fuel item ID

-- Function to check if a block is in the allowed list
local function isAllowedBlock(blockName)
    for _, allowed in ipairs(ALLOWED_BLOCKs) do
        if blockName == allowed then
            return true
        end
    end
    return false
end

-- Function to refuel the turtle
local function refuel()
    print("Attempting to refuel...")
    local fuelSlot = -1
    for i = 1, turtle.getInventorySize() do
        local item = turtle.getItemDetail(i)
        if item and item.name == FUEL_ITEM then
            fuelSlot = i
            break
        end
    end

    if fuelSlot ~= -1 then
        turtle.select(fuelSlot)
        if turtle.refuel() then
            print("Refueled successfully.")
            return true
        else
            print("Failed to refuel.")
            return false
        end
    else
        print("No fuel found in inventory.")
        return false
    end
end

-- Function to check and mine a block if it's exposed and allowed
local function checkAndMine(direction)
    local success, data = turtle.inspect(direction)
    if success then
        if isAllowedBlock(data.name) then
            local successUp, dataUp = turtle.inspectUp()
            if successUp and dataUp.name == "minecraft:air" then
                print("Mining " .. data.name .. " " .. direction)
                turtle.dig(direction)
                -- Optional: You could add a short sleep here
                -- os.sleep(0.1)
                return true -- Mined a block
            end
        end
    end
    return false -- Did not mine a block
end

-- Main mining loop
local radius = 0
local mined_in_cycle = 0

while turtle.getYLevel() <= MAX_Y do
    print("Current Y: " .. turtle.getYLevel())
    mined_in_cycle = 0

    -- Move outwards in a spiral pattern
    for i = 1, radius * 2 + 1 do
        -- Check fuel before moving
        if turtle.getFuelLevel() < 50 then -- Refuel when fuel is low
            if not refuel() then
                print("Cannot refuel, stopping.")
                return
            end
        end

        -- Check and mine in front
        if checkAndMine("forward") then
            mined_in_cycle = mined_in_cycle + 1
        end

        -- Move forward, avoiding non-allowed blocks
        local success, data = turtle.inspect("forward")
        if success and not isAllowedBlock(data.name) and data.name ~= "minecraft:air" then
             print("Blocked by non-allowed block, skipping forward movement.")
        else
             if not turtle.forward() then
                 print("Failed to move forward, potentially blocked.")
                 -- You might want to add more sophisticated blocking handling here
                 -- For now, we just print a message and continue
             end
        end
    end

    -- Turn and increase radius
    turtle.turnLeft()

    if radius > 0 then
        for i = 1, radius * 2 + 1 do
            -- Check fuel before moving
            if turtle.getFuelLevel() < 50 then
                if not refuel() then
                    print("Cannot refuel, stopping.")
                    return
                end
            end

            -- Check and mine in front
            if checkAndMine("forward") then
                mined_in_cycle = mined_in_cycle + 1
            end

             -- Move forward, avoiding non-allowed blocks
            local success, data = turtle.inspect("forward")
            if success and not isAllowedBlock(data.name) and data.name ~= "minecraft:air" then
                 print("Blocked by non-allowed block, skipping forward movement.")
            else
                 if not turtle.forward() then
                     print("Failed to move forward, potentially blocked.")
                 end
            end
        end
        turtle.turnLeft()
    end

    radius = radius + 1

    -- Check if no blocks were mined in the last cycle (might be stuck or done)
    if mined_in_cycle == 0 and radius > 1 then
         print("No allowed blocks mined in the last cycle. Potentially done or stuck.")
         -- You might want to add more sophisticated logic here to break out of the loop
         -- For now, we'll let it continue, but it might just keep spiraling
    end
end

print("Reached maximum Y level or stopped.")