SpawnerBuildRedwire

-- Usage: place at Stone brick level, turtle facing against the wall (it will turn itself anyway)
-- Supply with stone Blocks,
-- Supply with dirt Blocks (cursed earth)

-- it will build a whole floor row for a level (inside pre-built walls! https://pastebin.com/vBszs7pe )


-- ItemSupply:
-- rows, starting with 1
wireBlock = 1   -- need 76+ per level (PLUS spawnerHeight)
chestSlot = 16  -- ender chest: slot or 0 to disable


spawnerHeight = (2) * 2 -- height between Fan levels

direction = "up"

-- 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 buildRow(n)
    for i = 1, n do
        turtle.place()
        turtle.turnRight()
        turtle.forward()
        turtle.turnLeft()
    end
end

function buildCorner(n)
    for i = 1, n do
        -- Corner 1 Front
        turtle.place()
        -- Corner 1 Left
        turtle.turnRight()
        turtle.forward()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnLeft()
        turtle.place()
        --
        turtle.turnRight()
    end
end

function buildLevel()
    -- build complete row
    for i = 1, 4 do
        moveSupplyRow(wireBlock, target)
        -- build first side half
        buildRow(7)

        turtle.forward()

        buildCorner(6)

        turtle.forward()
        turtle.turnLeft()
        turtle.back()
    end

    -- turtle can't move to start position because of cable block
    turtle.turnRight()
    turtle.forward()
    turtle.turnLeft()
    turtle.forward()

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

buildLevels = 17
stoneEnabled = true
dirtEnabled = true

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
turtle.back()
for n = 1, buildLevels do
    buildLevel()
end