excavator

local scriptName = "excavator"
local args = {...}

if #args < 4 then
    print("Usage: " .. scriptName .. " <width> <depth> <height> <start>")
    print("<start> should be 'top' or 'bottom'")
    return
end

dofile("turtle_bot")
local t = TurtleBot.new(scriptName, "North")
t:connect()


local WIDTH = tonumber(args[1])
local DEPTH = tonumber(args[2])
local HEIGHT = tonumber(args[3])
local START = args[4]

if not inList(START, {"top", "bottom"}) then
    print("Invalid start option. Use 'top' or 'bottom'.")
    return
end


local function mineRow(steps)
    for _ = 1, steps do
        while turtle.detect() do
            t:dig()

            local inventory = t:inventory()
            if #inventory > 10 then
                t:enderDeposit(COLOR_CHANNELS.miningDepot, {})
                t:dig("up")
            end

            t:enderRefuel(2000, 5000, ITEMS.charcoal)
            t:dig("up")
            sleep(.5)
        end
        t:forward()
    end
end


local function mineLayer(width, depth)
    for w = 1, width do
        mineRow(depth - 1)
        if w ~= width then
            if w % 2 == 1 then
                t:right()
                mineRow(1)
                t:right()
            else
                t:left()
                mineRow(1)
                t:left()
            end
        end
    end
    if width % 2 == 0 then
        t:right()
        t:right()
        mineRow(width - 1)
        t:right()
        t:right()
    end
end


local function main()
    for h = 1, HEIGHT do
        mineLayer(WIDTH, DEPTH)
        if h ~= HEIGHT then
            if START == "top" then
                t:dig("down")
                t:down()
            else
                t:dig("up")
                t:up()
            end
        end
    end
end

t:execute(main)