local args = {...}

-- Config to determine what the turtle should mine
local config = {
    ["diamond"] = true,
    ["iron ore"] = true,
    ["misc"] = false,
}

local minFuelLevel = 200
local torchSlot = 1
local fuelSlot = 2
local chestSlot = 3

local function initialize()
    print("Starting turtle...")
    print("Torches set to slot "..torchSlot)
    print("Fuel set to slot "..fuelSlot)
end

local function digUp()
    while turtle.detectUp() do
        turtle.digUp()
    end
end

local function digDown()
    while turtle.detectDown() do
        turtle.digDown()
    end
end

local function dig()
    while turtle.detect() do
        turtle.dig()
    end
end

local function forward()
    while not turtle.forward() do
        dig()
    end
end

local function up()
    while not turtle.up() do
        digUp()
    end
end

local function down()
    while not turtle.down() do
        digDown()
    end
end

local function aboutFace()
    turtle.turnLeft()
    turtle.turnLeft()
end

local function checkFuelLevel()

    local fuelLevel = turtle.getFuelLevel()

    if fuelLevel < minFuelLevel then
        turtle.select(fuelSlot)
        turtle.refuel(1)
        print("Refuelling... fuel level is now "..turtle.getFuelLevel())
    end
end

local function placeChest()
    -- Place a chest behind the turtle
    turtle.select(chestSlot)
    dig()
    turtle.place()

    for i = 4, 16 do
        turtle.select(i)
        turtle.drop()
    end
end

local function mineAboutMine()
    dig()
    turtle.turnLeft()
    turtle.turnLeft()
    dig()
end

local function doStripMine()

    local stripLength = 4

    checkFuelLevel()

    ------------------------------------
    -- STARTING FROM MIDDLE, GO UP THEN MINE DOWN
    ------------------------------------
    up()

    for i=1, stripLength / 2 do

        checkFuelLevel()

        -- Mine top layer, finish looking right
        turtle.turnLeft()
        dig()
        aboutFace()
        dig()

        if (i % 7) == 0 then
            turtle.select(torchSlot)
            turtle.place()
        end

        -- Mine middle layer, finish looking left
        down()
        dig()
        aboutFace()
        dig()

        -- Mine bottom layer, finish looking right
        down()
        dig()
        aboutFace()
        dig()

        -- Go forwards to start mining the next layer
        turtle.turnLeft()
        forward()

        ------------------------------------
        -- STARTING FROM BOTTOM, MINE UP TO THE TOP
        ------------------------------------

        -- Mine bottom layer, finish looking right
        turtle.turnLeft()
        dig()
        aboutFace()
        dig()

        -- Mine middle layer, finish looking left
        up()
        dig()
        aboutFace()
        dig()

        -- Mine top layer, finish looking forward
        up()
        dig()
        aboutFace()
        dig()
        turtle.turnLeft()
    end

    turtle.down()
    turtle.turnLeft()
    turtle.turnLeft()

    for i=1, stripLength do
        turtle.forward()
    end

    placeChest()
end

for i=1, 10 do
    doStripMine()

    turtle.turnLeft()

    for j=1, 5 do
        forward()
        digUp()
        digDown()
    end

    turtle.turnLeft()
end