Mining turtle Miner

-- Using the program
local height = 0
local width = 0
local depth = 0

if #arg == 3 then
    height = tonumber(arg[1])
    width = tonumber(arg[2])
    depth = tonumber(arg[3])

    if width % 2 == 0 or height % 2 == 0 then
        print("The Width and Height need to be odd numbers")
        return
    elseif width == 1 or height == 1 then
        print("The Width and Height need to be more that one")
        return
    end
else
    print("There needs to be three correct arguments (e.g. mine 5 5 10)")
    return
end

-- useful Vars
local INVENTORY_SIZE = 16
local mineHeight = math.floor(height / 2)
local mineWidth = math.floor(width / 2)

-- List of fuels
local FUELS = {
    "minecraft:coal_block",
    "minecraft:coal",
    "minecraft:lava_bucket"
}

-- Whitelist for inventory
local WHITELISTED_ITEMS = {
    "minecraft:coal",
    "minecraft:coal_block",
    "minecraft:redstone",
    "minecraft:dye",
    "minecraft:emerald",
    "minecraft:gold_ore",
    "minecraft:iron_ore",
    "minecraft:diamond",
    "minecraft:lava_bucket",
    "thermalfoundation:ore",
    "bigreactors:oreyellorite",
    "tconstruct:ore",
    "ic2:nuclear",
    "draconicevolution:draconium_dust"
}

-- Checks Inventory
function InventoryCheck()
    -- Checks for shit items then drops them if bad
    for i = 1, INVENTORY_SIZE do
        local currentItem = turtle.getItemDetail(i)
        if currentItem ~= nil then
            local isAcceptedItem = false
            for x = 1, #WHITELISTED_ITEMS do
                if currentItem.name == WHITELISTED_ITEMS[x] then
                    isAcceptedItem = true
                end
            end
            if not isAcceptedItem then
                turtle.select(i)
                turtle.dropUp()
            end
        end
    end

    -- keeps stuff in stacks
    for j = 1, INVENTORY_SIZE do
        local selectedSlot = turtle.getItemDetail(j)

        if selectedSlot ~= nil then
           turtle.select(j)
           for k = j, INVENTORY_SIZE do
               if turtle.compareTo(k) then
                    turtle.select(k)
                    turtle.transferTo(j)
                    turtle.select(j)
               end
           end
        end
    end
end

-- Refuel using the found fuel
function refuel(slot_number)
    print("[TURTLE] Refueling... ")
    turtle.select(slot_number)
    turtle.refuel()
    print("[TURTLE] Nom. Nom. Nom.")
end

-- Check the current fuel level
function checkFuelLevel()
    local requiredFuelLevel = math.ceil((height * width * depth) + (mineHeight + mineWidth))
    local currentFuelLevel = turtle.getFuelLevel()

    print("[TURTLE] Current fuel level is: "..currentFuelLevel.." - Required: "..requiredFuelLevel)

    if currentFuelLevel < requiredFuelLevel then

        print("[TURTLE] Attempting to locate fuel.")

        for i = 1, INVENTORY_SIZE do
            local currentItem = turtle.getItemDetail(i)
            if currentItem ~= nil then
                for x = 1, #FUELS do
                    if currentItem.name == FUELS[x] then
                        print("[TURTLE] Acceptable fuel found: " ..FUELS[x])

                        if currentFuelLevel < requiredFuelLevel then
                            refuel(i)
                        else
                            return true
                        end
                    end
                end
            end
        end
        print("[TURTLE] No acceptable fuel or not enough found, terminating program...")
        return false
    else
        return true
    end
end

-- Combat gravel/sand
function moveUpAndDig()
    while turtle.up() == false do
        turtle.digUp()
    end
end

function moveForwardAndDig()
    while turtle.forward() == false do
        turtle.dig()
        InventoryCheck()
    end
end

function moveDownAndDig()
    while turtle.down() == false do
        turtle.digDown()
    end
end

-- Move to start position
function moveToStartPosition()

    -- Move to horizontal start position
    turtle.turnLeft()
    for i = 1, mineWidth do
        moveForwardAndDig()
    end
    turtle.turnRight()

    -- Move to vertical start postion
    for i = 1, mineHeight do
        moveUpAndDig()
    end

end

-- Mining Sequence
function mineSequence()

    moveToStartPosition()

    for x = 1, depth do

        moveForwardAndDig()

        for i = 1, height do

            if x % 2 == 0 then
                turtle.turnLeft()
            else
                turtle.turnRight()
            end

            for y = 1, width - 1 do
                moveForwardAndDig()
            end

            if i ~= height then
                if x % 2 == 0 then
                    turtle.turnLeft()
                    moveUpAndDig()
                else
                    turtle.turnRight()
                    moveDownAndDig()
                end
            end

        end

        if x % 2 == 0 then
            turtle.turnRight()
        else
            turtle.turnLeft()
        end

        InventoryCheck()

    end

end

if checkFuelLevel() then
    mineSequence()
end