CC Miner

local options = {
    startBlock = "minecraft:spruce_planks",
    wingFreq = 4,
    wingLength = 10,
    wantedOre = {
        "minecraft:coal_ore",
        "minecraft:deepslate_coal_ore",
        "minecraft:iron_ore",
        "minecraft:deepslate_iron_ore",
        "minecraft:copper_ore",
        "minecraft:deepslate_copper_ore",
        "minecraft:gold_ore",
        "minecraft:deepslate_gold_ore",
        "minecraft:redstone_ore",
        "minecraft:deepslate_redstone_ore",
        "minecraft:emeral_ore",
        "minecraft:deepslate_emerald_ore",
        "minecraft:lapis_ore",
        "minecraft:deepslate_lapis_ore",
        "minecraft:diamond_ore",
        "minecraft:deepslate_diamond_ore",
    },
    fuelMin = 100,
}
local side
local current = -1
local t = turtle




local function compare(wanted, found)
    for i = 1, #wanted do
        if found == wanted[i] then
            return true
        end
    end
    return false
end

local function detect(dir)
    if dir == "forward" then
        return t.detect()
    elseif dir == "down" then
        return t.detectDown()
    elseif dir == "up" then
        return t.detectUp()
    end
end

local function inspect(dir)
    local success, data
    if dir == "forward" then
        success, data = t.inspect()
    elseif dir == "down" then
        success, data = t.inspectDown()
    elseif dir == "up" then
        success, data = t.inspectUp()
    end
    return success, data
end

local function dig(dir)
    if dir == "forward" then
        t.dig()
    elseif dir == "down" then
        t.digDown()
    elseif dir == "up" then
        t.digUp()
    end
end

local function move(dir)
    if dir == "forward" then
        t.forward()
    elseif dir == "down" then
        t.down()
    elseif dir == "up" then
        t.up()
    elseif dir == "back" then
        t.back()
    end
end

local function detectTurtle(dir)
    local success, data = inspect(dir)
    if success and data.name == "computercraft:turtle_advanced" then
        return true
    end
    return false
end

local function mineMove(dir)
    local dug = false
    while detect(dir) do
        if not detectTurtle(dir) then
            dig(dir)
            dug = true
        else
            sleep(2)
        end
    end
    move(dir)
    return dug
end






local function refuel()
    print("refueling...")
    for i=1,16,1 do
        t.select(i)
        t.refuel(t.getItemCount(i))
    end
    t.select(1)
    print("fuel level: "..t.getFuelLevel())
end

local function detectOre()
    local opposites = {
        ["forward"] = "back",
        ["back"] = "forward",
        ["up"] = "down",
        ["down"] = "up",
    }
    local function func(dir)
        local success, data = inspect(dir)
        if success and compare(options.wantedOre, data.name) then
            print("found " .. data.name)
            mineMove(dir)
            detectOre()
            mineMove(opposites[dir])
        end
    end
    func("up")
    func("down")
    for _=1,4,1 do
        func("forward")
        t.turnRight()
    end
end

local function sideShaft()
    for _=1,options.wingLength,1 do
        mineMove("forward")
        detectOre()
    end
    mineMove("up")
    mineMove("up")
    mineMove("up")
    t.turnLeft()
    t.turnLeft()
    for _=1,options.wingLength,1 do
        detectOre()
        mineMove("forward")
    end
    mineMove("down")
    mineMove("down")
    mineMove("down")
    t.turnLeft()
    t.turnLeft()
end

local function mainShaft()
    if t.getFuelLevel() < options.fuelMin then
        refuel()
    end

    while t.detectUp() do
        t.digUp()
    end

    if current == -1 then
        while not t.detect() do
            local success, data = inspect("down")
            if success and data.name == options.startBlock then
                break
            end
            t.forward()
        end
        current = 1
        t.turnLeft()
        t.turnLeft()
    elseif current <= options.wingFreq then
        current = current + 1
        mineMove("forward")
    else
        current = 1
        if side == "left" then t.turnLeft()
        elseif side == "right" then t.turnRight()
        end

        if t.detect() then
            sideShaft()
        end

        if side == "left" then t.turnRight()
        elseif side == "right" then t.turnLeft()
        end
    end
end

local function main()
    -- TODO: check fuel levels
    -- TODO: check inventory space
    mainShaft()
end

local function init()
    print("BRANCH MINING MK2")
    print("shaft frequency: "..options.wingFreq)
    print("shaft length: "..options.wingLength)
    refuel()

    t.turnLeft()
    if t.detect() then side = "left" end -- TODO: filter out torches and turtles
    t.turnLeft()
    t.turnLeft()
    if t.detect() then side = "right" end
    t.turnRight()
    print("side: "..side)

    if side ~= nil then
        while true do
            main()
        end
    end
end
init()

-- i hate lua