SpawnerOutsideLamps

-- Usage: place outside against the redwire
-- Supply with inverted Lamps
-- Supply with wires

-- It will build lamps into the wall and place wires VERTICALLY


-- ItemSupply:
-- rows, starting with 1
wireBlock = 1
lampBlock = 2

wireEnabled = true
lampEnabled = true

chestSlot = 0   -- ender chest: slot or 0 to disable DOESNT WORK HERE

spawnerHeight = 2 * 2

-- moves row to the first slow of the row
-- at least keep Target supply in slot
function moveSupplyRow(row, target)
    if not target then target = 16 end

    local start = (row-1)*4+2
    for i = start, 16 do
        if i ~= chestSlot then
            -- exit if enough items
            if turtle.getItemCount(start-1) >= target then break end

            turtle.select(i)
            turtle.transferTo(start-1)
        end
    end

    if chestSlot ~= 0 and turtle.getItemCount(start-1) < target then
        -- not enough items, fill from ender chest
        local direction
        local dirs = {"", "Up", "Down"}

        turtle.select(chestSlot)
        for d = 1, #dirs do
            direction = dirs[d]

            if turtle["place" .. direction]() then
                break
            end

            if d == 3 then
                error("Couldnt refill from chest")
            end
        end

        for i = 1, 15 do
            turtle["suck" .. direction]()
            os.sleep(0.2)
        end
        -- free enderchest slot
        turtle.select(chestSlot)
        turtle["drop" .. direction]()
        turtle["dig" .. direction]()
    end

    turtle.select(row2slot(row))
end

function row2slot(row)
    return (row-1)*4+1
end

function buildLevel()
    if lampEnabled then
        moveSupplyRow(lampBlock, 64)
    end

    if wireEnabled then
        moveSupplyRow(wireBlock, 64)
    end

    for i = 1, spawnerHeight do
        turtle[direction]()

        if i % 2 == 1 and i ~= spawnerHeight then
            if lampEnabled then
                turtle.forward()
                turtle.dig()
                turtle.select(row2slot(lampBlock))
                turtle.place()
                turtle.back()
            end
        end

        if wireEnabled then
            turtle.select(row2slot(wireBlock))
            turtle.place()
        end
    end

end

buildLevels = 17

print("How many levels to build? Default: ".. tostring(buildLevels))
buildLevels = tonumber(io.read()) or buildLevels
print("--> ".. tostring(buildLevels) .. " levels")

print("Direction? 'up' or 'down'. Default: 'up'")
direction = io.read()
if direction == "" then
    direction = "up"
end

-- move away from wall after placement
for n = 1, buildLevels do
    buildLevel()
end