CC:Tweaked - Miner

-- Predefine enum
local DIRECTION = {
    left = 1,
    right = 2
}

-- Predefine variables
local version = "0.1"
local accepted_fuels = {"minecraft:coal_block", "minecraft:coal", "minecraft:charcoal"}
local inventory_size = 16
local check_inventory_every = 20
local depth = nil
local width = nil
local height = nil
local currentDepth = 1
local currentWidth = 1
local currentHeight = 1
local direction;

-- Read arguments
local args = {...}

-- Check arguments. Possible arguments are:
-- -h, --help: Print this help message
-- -v, --version: Print version information
-- --depth <depth>: Set the depth of the square
-- --width <width>: Set the width of the square
-- --height <height>: Set the height of the square
for i = 1, #args do
    if args[i] == "-h" or args[i] == "--help" then
        print("Usage: mine_tutrle_square.lua [OPTIONS]")
        print("Options:")
        print("-h, --help: Print this help message")
        print("-v, --version: Print version information")
        print("--depth <depth>: Set the depth of the square")
        print("--width <width>: Set the width of the square")
        print("--height <height>: Set the height of the square")
        return
    elseif args[i] == "-v" or args[i] == "--version" then
        print("mine_tutrle_square.lua " .. version)
        return
    elseif args[i] == "--depth" and args[i + 1] then
        depth = tonumber(args[i + 1])
        if not depth then
            print("Error: Invalid depth")
            return
        end
    elseif args[i] == "--width" and args[i + 1] then
        width = tonumber(args[i + 1])
        if not width then
            print("Error: Invalid width")
            return
        end
    elseif args[i] == "--height" and args[i + 1] then
        height = tonumber(args[i + 1])
        if not height then
            print("Error: Invalid height")
            return
        end
    end
end

-- Create the refill function
function Refill()
    print("Refueling...")
    for i = 1, inventory_size do
        for j = 1, #accepted_fuels do
            if turtle.getItemDetail(i) and turtle.getItemDetail(i).name == accepted_fuels[j] then
                turtle.select(i)
                turtle.refuel()
                break
            end
        end
    end
end

-- Create the mining function
function Mine()
    print("Mining...")
    for i = 1, height do

        print("Mining height " .. i .. " of " .. height)

        -- Move up if height > 1
        if height > 1 then
            if turtle.detectUp() then
                turtle.up()
            else
                turtle.digUp()
                turtle.up()
            end
            i = i + 1
            print("Mining layer " .. i .. " of " .. height)
        end

        for j = 1, width do
            print("Mining width " .. j .. " of " .. width)
            for k = 1, depth do
                print("Mining depth " .. k .. " of " .. depth)

                -- Dig below if heigh > 1 and there is a block below
                if height > 1 and turtle.detectDown() then
                    turtle.digDown()
                end

                -- Dig above if height is i - 1 and there is a block above
                if height > 1 and i == height - 1 and turtle.detectUp() then
                    turtle.digUp()
                end

                -- Dig infront of the turtle
                if turtle.detect() then
                    turtle.dig()
                end

                turtle.forward()
            end

            -- Turn around
            if j % 2 == 1 then -- Odd = Start to end, ebven = end to start
                if direction == DIRECTION.left then
                    turtle.turnLeft()
                else
                    turtle.turnRight()
                end

                if turtle.detect() then
                    turtle.dig()
                end
                turtle.forward()
                if direction == DIRECTION.left then
                    turtle.turnLeft()
                else
                    turtle.turnRight()
                end
            else
                if direction == DIRECTION.left then
                    turtle.turnRight()
                else
                    turtle.turnLeft()
                end

                if turtle.detect() then
                    turtle.dig()
                end
                turtle.forward()
                if direction == DIRECTION.left then
                    turtle.turnRight()
                else
                    turtle.turnLeft()
                end
            end
        end
    end
end

-- Create the main function
function Main()

    -- Check direction
    turtle.turnLeft()
    if turtle.detect() then
        direction = DIRECTION.right
    else
        direction = DIRECTION.left
    end
    turtle.turnRight()

    -- Measure depth if not set
    if depth == nil or depth < 1 then

        print("Depth not set. Measuring depth...")
        depth = 1

        -- Move forward until we hit a wall
        while turtle.detect() == false do
            turtle.forward()
            depth = depth + 1
        end

        -- Turn around and move back
        turtle.turnLeft()
        turtle.turnLeft()
        for i = 1, depth do
            turtle.forward()
        end
        turtle.turnLeft()
        turtle.turnLeft()

        print("Depth: " .. depth)
    end

    -- Measure width if not set
    if width == nil or width < 1 then

        print("Width not set. Measuring width...")

        -- Rotate to "direction"
        if direction == DIRECTION.left then
            turtle.turnLeft()
        else
            turtle.turnRight()
        end

        width = 1

        -- Move forward until we hit a wall
        while turtle.detect() == false do
            turtle.forward()
            width = width + 1
        end

        -- Turn around and move back
        turtle.turnLeft()
        turtle.turnLeft()
        for i = 1, width do
            turtle.forward()
        end
        if direction == DIRECTION.left then
            turtle.turnLeft()
        else
            turtle.turnRight()
        end

        print("Width: " .. width)
    end

    -- Measure height if not set
    if height == nil or height < 1 then

        print("Height not set. Measuring height...")
        height = 1

        -- Move up until we hit a wall
        while turtle.detectUp() == false do
            turtle.up()
            height = height + 1
        end

        -- Move down
        for i = 1, height do
            turtle.down()
        end

        print("Height: " .. height)
    end

    print("Starting...")
    while true do
        if turtle.getFuelLevel() < 100 then
            Refill()
        end
        Mine()
    end
end

-- Run the main function
Main()