simpleDigger

local args = { ... }

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

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

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

function forward(count)
    for i = 1, count do
        digForward(1)
        while not turtle.forward() do
            digForward(1)
            turtle.attack()
        end
    end
end

function up(count)
    for i = 1, count do
        digUp(1)
        while not turtle.up() do
            digUp(1)
            turtle.attackUp()
        end
    end
end

function down(count)
    for i = 1, count do
        digDown(1)
        while not turtle.down() do
            digDown(1)
            turtle.attackDown()
        end
    end
end

function turnLeft(count)
    for i = 1, count do
        turtle.turnLeft()
    end
end

function turnRight(count)
    for i = 1, count do
        turtle.turnRight()
    end
end

if #args ~= 3 then
    error("expected exactly 3 arguments (" .. #args .. " given)  [turtle is standing in area and facing x, right is y and top is z args:[x,y,z]]")
end

local d = tonumber(args[1])
local w = tonumber(args[2])
local h = tonumber(args[3])

function digModed(mode)
    if mode > 0 then digUp() end --height>1
    if mode > 1 then digDown() end --height=3
end

function digSurface(x, y, mode)
    if mode > 1 then up(1) end --height=3
    for y1 = 1, y do
        for x1 = 1, x - 1 do
            digModed(mode)
            forward(1)
        end
        digModed(mode)

        if y1 ~= y then
            if y1 % 2 == 1 then
                turnRight(1)
                forward(1)
                digModed(mode)
                turnRight(1)
            else
                turnLeft(1)
                forward(1)
                digModed(mode)
                turnLeft(1)
            end
        end
    end
    if mode > 1 then down(1) end --height=3
end

local mode = h % 3
h = h / 3 - mode / 3

mode=mode-1

if mode==-1 then mode=2 end

if mode ~= 2 then h = h + 1 end


print("mode: ",mode)

for h1 = 1, h do
    if h1 == h then
        print(1)
        digSurface(d, w, mode)
    else
        print(2)
        digSurface(d, w, 3)
        up(3)
        if w % 2 == 0 then
            turnRight(1)
            local p = d
            d = w
            w = p
        else
            turnLeft(2)
        end
    end
end