noordstar_dripstone = {}

-- Constants
local speed_factor = 60
local seconds_per_growth = 10 * speed_factor
local seconds_per_water_trickle = 1 * speed_factor
local seconds_per_lava_trickle = 6 * speed_factor
local samples_per_interval = 30

-- Namespaced node names
local dry_dripstone_block = "noordstar_dripstone:dripstone_block"
local dry_dripstone_huge = "noordstar_dripstone:huge_dripstone"
local dry_dripstone_large = "noordstar_dripstone:large_dripstone"
local dry_dripstone_great = "noordstar_dripstone:great_dripstone"
local dry_dripstone_medium = "noordstar_dripstone:medium_dripstone"
local dry_dripstone_small = "noordstar_dripstone:small_dripstone"
local dry_dripstone_tiny = "noordstar_dripstone:tiny_dripstone"
local dry_dripstone_spike = "noordstar_dripstone:dripstone_spike"
local hardened_dripstone_block = "noordstar_dripstone:hardened_dripstone_block"
local hardened_dripstone_huge = "noordstar_dripstone:huge_hardened_dripstone"
local hardened_dripstone_large = "noordstar_dripstone:large_hardened_dripstone"
local hardened_dripstone_great = "noordstar_dripstone:great_hardened_dripstone"
local hardened_dripstone_medium = "noordstar_dripstone:medium_hardened_dripstone"
local hardened_dripstone_small = "noordstar_dripstone:small_hardened_dripstone"
local hardened_dripstone_tiny = "noordstar_dripstone:tiny_hardened_dripstone"
local hardened_dripstone_spike = "noordstar_dripstone:hardened_dripstone_spike"
local molten_dripstone_block = "noordstar_dripstone:molten_dripstone_block"
local molten_dripstone_huge = "noordstar_dripstone:huge_molten_dripstone"
local molten_dripstone_large = "noordstar_dripstone:large_molten_dripstone"
local molten_dripstone_great = "noordstar_dripstone:great_molten_dripstone"
local molten_dripstone_medium = "noordstar_dripstone:medium_molten_dripstone"
local molten_dripstone_small = "noordstar_dripstone:small_molten_dripstone"
local molten_dripstone_tiny = "noordstar_dripstone:tiny_molten_dripstone"
local molten_dripstone_spike = "noordstar_dripstone:molten_dripstone_spike"
local watered_dripstone_block = "noordstar_dripstone:watered_dripstone_block"
local watered_dripstone_huge = "noordstar_dripstone:huge_watered_dripstone"
local watered_dripstone_large = "noordstar_dripstone:large_watered_dripstone"
local watered_dripstone_great = "noordstar_dripstone:great_watered_dripstone"
local watered_dripstone_medium = "noordstar_dripstone:medium_watered_dripstone"
local watered_dripstone_small = "noordstar_dripstone:small_watered_dripstone"
local watered_dripstone_tiny = "noordstar_dripstone:tiny_watered_dripstone"
local watered_dripstone_spike = "noordstar_dripstone:watered_dripstone_spike"

local internal = {
	-- Nodes that the mod should consider as sources to extract water from
	water_nodes = { 
		"default:river_water_source",
		"default:water_source",
		"mcl_core:water_source",
		"mclx_core:river_water_source",
	},

	-- Nodes that the mod should consider as sources to extract lava from
	lava_nodes = {
		"default:lava_source",
		"mcl_core:lava_source",
	},

	-- Nodes that can catch a lava droplet instead of letting a spike grow on top
	lava_cauldrons = {
		{ from = dry_dripstone_spike, to = molten_dripstone_spike },
	},

	-- Nodes that can catch a water droplet instead of letting a spike grow on top
	water_cauldrons = {
		{ from = dry_dripstone_spike, to = watered_dripstone_spike },
	}
}

function noordstar_dripstone.add_lava_source(nodename)
	table.insert(internal.lava_nodes)
end
function noordstar_dripstone.add_water_source(nodename)
	table.insert(internal.water_nodes, nodename)
end

function noordstar_dripstone.add_lava_catcher(nodename, newnodename)
	table.insert(internal.lava_cauldrons, { from = nodename, to = newnodename })
end
function noordstar_dripstone.add_water_catcher(nodename, newnodename)
	table.insert(internal.water_cauldrons, { from = nodename, to = newnodename })
end


-- Create a node box for any given dripstone size.
-- Size 8 is a normal block size
local function nodebox_of_size(size)
	if size >= 8 then
		return nil
	else
		return {
			type = "fixed",
			fixed = {
				{ - size / 16, -0.5, - size / 16, size / 16, 0.5, size / 16 },
			},
		}
	end
end

local function drawtype_of_size(size)
	if size >= 8 then
		return "normal"
	else
		return "nodebox"
	end
end

-- Sounds
local dripstone_sounds
if minetest.get_modpath("mcl_sounds") then
	dripstone_sounds = mcl_sounds.node_sound_stone_defaults()
end

-- Trickle down config

local lava_trickle_down = {
	{ from = dry_dripstone_block, to = molten_dripstone_block },
	{ from = dry_dripstone_huge, to = molten_dripstone_huge },
	{ from = dry_dripstone_large, to = molten_dripstone_large },
	{ from = dry_dripstone_great, to = molten_dripstone_great },
	{ from = dry_dripstone_medium, to = molten_dripstone_medium },
	{ from = dry_dripstone_small, to = molten_dripstone_small },
	{ from = dry_dripstone_tiny, to = molten_dripstone_tiny },
	{ from = dry_dripstone_spike, to = molten_dripstone_spike },
	{ from = watered_dripstone_block, to = hardened_dripstone_block },
	{ from = watered_dripstone_huge, to = hardened_dripstone_huge },
	{ from = watered_dripstone_large, to = hardened_dripstone_large },
	{ from = watered_dripstone_great, to = hardened_dripstone_great },
	{ from = watered_dripstone_medium, to = hardened_dripstone_medium },
	{ from = watered_dripstone_small, to = hardened_dripstone_small },
	{ from = watered_dripstone_tiny, to = hardened_dripstone_tiny },
	{ from = watered_dripstone_spike, to = hardened_dripstone_spike },
	{ from = "air", to = dry_dripstone_spike },
}
local water_trickle_down = {
	{ from = dry_dripstone_block, to = watered_dripstone_block },
	{ from = dry_dripstone_huge, to = watered_dripstone_huge },
	{ from = dry_dripstone_large, to = watered_dripstone_large },
	{ from = dry_dripstone_great, to = watered_dripstone_great },
	{ from = dry_dripstone_medium, to = watered_dripstone_medium },
	{ from = dry_dripstone_small, to = watered_dripstone_small },
	{ from = dry_dripstone_tiny, to = watered_dripstone_tiny },
	{ from = dry_dripstone_spike, to = watered_dripstone_spike },
	{ from = molten_dripstone_block, to = hardened_dripstone_block },
	{ from = molten_dripstone_huge, to = hardened_dripstone_huge },
	{ from = molten_dripstone_large, to = hardened_dripstone_large },
	{ from = molten_dripstone_great, to = hardened_dripstone_great },
	{ from = molten_dripstone_medium, to = hardened_dripstone_medium },
	{ from = molten_dripstone_small, to = hardened_dripstone_small },
	{ from = molten_dripstone_tiny, to = hardened_dripstone_tiny },
	{ from = molten_dripstone_spike, to = hardened_dripstone_spike },
	{ from = "air", to = dry_dripstone_spike },
}

local lava_trickle_down_spike = {
	{ from = dry_dripstone_block, to = molten_dripstone_block },
	{ from = dry_dripstone_huge, to = molten_dripstone_huge },
	{ from = dry_dripstone_large, to = molten_dripstone_large },
	{ from = dry_dripstone_great, to = molten_dripstone_great },
	{ from = dry_dripstone_medium, to = molten_dripstone_medium },
	{ from = dry_dripstone_small, to = molten_dripstone_small },
	{ from = dry_dripstone_tiny, to = molten_dripstone_tiny },
	{ from = dry_dripstone_spike, to = molten_dripstone_spike },
	{ from = watered_dripstone_block, to = hardened_dripstone_block },
	{ from = watered_dripstone_huge, to = hardened_dripstone_huge },
	{ from = watered_dripstone_large, to = hardened_dripstone_large },
	{ from = watered_dripstone_great, to = hardened_dripstone_great },
	{ from = watered_dripstone_medium, to = hardened_dripstone_medium },
	{ from = watered_dripstone_small, to = hardened_dripstone_small },
	{ from = watered_dripstone_tiny, to = hardened_dripstone_tiny },
	{ from = watered_dripstone_spike, to = hardened_dripstone_spike },
}
local water_trickle_down_spike = {
	{ from = dry_dripstone_block, to = watered_dripstone_block },
	{ from = dry_dripstone_huge, to = watered_dripstone_huge },
	{ from = dry_dripstone_large, to = watered_dripstone_large },
	{ from = dry_dripstone_great, to = watered_dripstone_great },
	{ from = dry_dripstone_medium, to = watered_dripstone_medium },
	{ from = dry_dripstone_small, to = watered_dripstone_small },
	{ from = dry_dripstone_tiny, to = watered_dripstone_tiny },
	{ from = dry_dripstone_spike, to = watered_dripstone_spike },
	{ from = molten_dripstone_block, to = hardened_dripstone_block },
	{ from = molten_dripstone_huge, to = hardened_dripstone_huge },
	{ from = molten_dripstone_large, to = hardened_dripstone_large },
	{ from = molten_dripstone_great, to = hardened_dripstone_great },
	{ from = molten_dripstone_medium, to = hardened_dripstone_medium },
	{ from = molten_dripstone_small, to = hardened_dripstone_small },
	{ from = molten_dripstone_tiny, to = hardened_dripstone_tiny },
	{ from = molten_dripstone_spike, to = hardened_dripstone_spike },
}

-- Tiles for dripstone

local dry_dripstone_tiles = {
	"noordstar_dripstone_dripstone_top.png",
	"noordstar_dripstone_dripstone_top.png",
	"noordstar_dripstone_dripstone_side.png",
}
local hardened_dripstone_tiles = {
	"noordstar_dripstone_hardened_dripstone_top.png",
	"noordstar_dripstone_hardened_dripstone_top.png",
	"noordstar_dripstone_hardened_dripstone_side.png",
}
local molten_dripstone_tiles = {
	"noordstar_dripstone_molten_dripstone_top.png",
	"noordstar_dripstone_molten_dripstone_top.png",
	"noordstar_dripstone_molten_dripstone_side.png",
}
local watered_dripstone_tiles = {
	"noordstar_dripstone_watered_dripstone_top.png",
	"noordstar_dripstone_watered_dripstone_top.png",
	"noordstar_dripstone_watered_dripstone_side.png",
}

-- Register dripstone nodes

local function make_dripstone(name, desc, longdesc, tiles, drop, size)
	local sunlight_propagates = nil
	if size < 8 then
		sunlight_propagates = true
	end

	minetest.register_node(name, {
		description = desc,
		_doc_items_longdesc = longdesc,
		tiles = tiles,
		groups = {
			pickaxey=2,
			material_stone=1,
			fall_damage_add_percent = math.max(4 - size, 0) / 4 * 100
		},
		is_ground_content = true,
		drop = {
			max_items = math.floor((size + 1) / 2),
			items = {
				{ rarity = 1
				, items = { drop }
				},
				{ rarity = 2
				, items = { drop }
				},
				{ rarity = 4
				, items = { drop }
				},
				{ rarity = 4
				, items = { drop }
				},
			}
		},
		sounds = dripstone_sounds,
		drawtype = drawtype_of_size(size),
		paramtype = "light",
		sunlight_propagates = sunlight_propagates,
		node_box = nodebox_of_size(size),
		_mcl_hardness = 1.0 + size / 8,
		_mcl_blast_resistance = 1 + size / 2,
		_mcl_silk_touch_drop = true,
	})
end

-- BASE BLOCKS
-- These blocks are able to absorb water or lava from above them.

make_dripstone(
	dry_dripstone_block,
	"Dripstone block",
	"Dripstone block that can suck up liquids above it and creates stalactites below it.",
	dry_dripstone_tiles,
	dry_dripstone_spike,
	8
)
make_dripstone(
	hardened_dripstone_block,
	"Hardened dripstone block",
	"Dripstone block that is no longer able to absorb liquids above it.",
	hardened_dripstone_tiles,
	dry_dripstone_spike,
	8
)
make_dripstone(
	molten_dripstone_block,
	"Molten dripstone block",
	"A dripstone block that has absorbed some lava, allowing it to form a stalactite.",
	molten_dripstone_tiles,
	dry_dripstone_spike,
	8
)
make_dripstone(
	watered_dripstone_block,
	"Watered dripstone block",
	"A dripstone block that has absorbed some water, allowing it to form a stalactite.",
	watered_dripstone_tiles,
	dry_dripstone_spike,
	8
)

-- HUGE DRIPSTONE
-- This is the largest form a non-block can get.

make_dripstone(
	dry_dripstone_huge,
	"Huge dripstone",
	"Dripstone in the largest shape it can reach.",
	dry_dripstone_tiles,
	dry_dripstone_spike,
	7
)
make_dripstone(
	hardened_dripstone_huge,
	"Huge hardened dripstone",
	"Dripstone in the largest shape it can reach. It is no longer able to grow or absorb liquids.",
	hardened_dripstone_tiles,
	hardened_dripstone_spike,
	7
)
make_dripstone(
	molten_dripstone_huge,
	"Huge molten dripstone",
	"Dripstone in the largest shape it can reach. It has absorbed some lava, but it can no longer grow in thickness.",
	molten_dripstone_tiles,
	dry_dripstone_spike,
	7
)
make_dripstone(
	watered_dripstone_huge,
	"Huge watered dripstone",
	"Dripstone in the largest shape it can reach. It has absorbed some water, but it can no longer grow in thickness.",
	watered_dripstone_tiles,
	dry_dripstone_spike,
	7
)

-- LARGE DRIPSTONE

make_dripstone(
	dry_dripstone_large,
	"Large dripstone",
	"A thick layer of dripstone.",
	dry_dripstone_tiles,
	dry_dripstone_spike,
	6
)
make_dripstone(
	hardened_dripstone_large,
	"Large hardened dripstone",
	"A thick layer of dripstone. It is no longer able to grow or absorb liquids.",
	hardened_dripstone_tiles,
	hardened_dripstone_spike,
	6
)
make_dripstone(
	molten_dripstone_large,
	"Large molten dripstone",
	"A thick layer of dripstone. It has absorbed some lava, so it is able to grow in thickness.",
	molten_dripstone_tiles,
	dry_dripstone_spike,
	6
)
make_dripstone(
	watered_dripstone_large,
	"Large watered dripstone",
	"A thick layer of dripstone. It has absorbed some water, so it is able to grow in thickness.",
	watered_dripstone_tiles,
	dry_dripstone_spike,
	6
)

-- GREAT DRIPSTONE

make_dripstone(
	dry_dripstone_great,
	"Great dripstone",
	"A thick layer of dripstone.",
	dry_dripstone_tiles,
	dry_dripstone_spike,
	5
)
make_dripstone(
	hardened_dripstone_great,
	"Great hardened dripstone",
	"A thick layer of dripstone. It is no longer able to grow or absorb liquids.",
	hardened_dripstone_tiles,
	hardened_dripstone_spike,
	5
)
make_dripstone(
	molten_dripstone_great,
	"Great molten dripstone",
	"A thick layer of dripstone. It has absorbed some lava, so it is able to grow in thickness.",
	molten_dripstone_tiles,
	dry_dripstone_spike,
	5
)
make_dripstone(
	watered_dripstone_great,
	"Great watered dripstone",
	"A thick layer of dripstone. It has absorbed some water, so it is able to grow in thickness.",
	watered_dripstone_tiles,
	dry_dripstone_spike,
	5
)

-- MEDIUM DRIPSTONE

make_dripstone(
	dry_dripstone_medium,
	"Medium dripstone",
	"A thick layer of dripstone.",
	dry_dripstone_tiles,
	dry_dripstone_spike,
	4
)
make_dripstone(
	hardened_dripstone_medium,
	"Medium hardened dripstone",
	"A thick layer of dripstone. It is no longer able to grow or absorb liquids.",
	hardened_dripstone_tiles,
	hardened_dripstone_spike,
	4
)
make_dripstone(
	molten_dripstone_medium,
	"Medium molten dripstone",
	"A thick layer of dripstone. It has absorbed some lava, so it is able to grow in thickness.",
	molten_dripstone_tiles,
	dry_dripstone_spike,
	4
)
make_dripstone(
	watered_dripstone_medium,
	"Medium watered dripstone",
	"A thick layer of dripstone. It has absorbed some water, so it is able to grow in thickness.",
	watered_dripstone_tiles,
	dry_dripstone_spike,
	4
)

-- SMALL DRIPSTONE

make_dripstone(
	dry_dripstone_small,
	"Small dripstone",
	"A thick layer of dripstone.",
	dry_dripstone_tiles,
	dry_dripstone_spike,
	3
)
make_dripstone(
	hardened_dripstone_small,
	"Small hardened dripstone",
	"A thick layer of dripstone. It is no longer able to grow or absorb liquids.",
	hardened_dripstone_tiles,
	hardened_dripstone_spike,
	3
)
make_dripstone(
	molten_dripstone_small,
	"Small molten dripstone",
	"A thick layer of dripstone. It has absorbed some lava, so it is able to grow in thickness.",
	molten_dripstone_tiles,
	dry_dripstone_spike,
	3
)
make_dripstone(
	watered_dripstone_small,
	"Small watered dripstone",
	"A thick layer of dripstone. It has absorbed some water, so it is able to grow in thickness.",
	watered_dripstone_tiles,
	dry_dripstone_spike,
	3
)

-- TINY DRIPSTONE

make_dripstone(
	dry_dripstone_tiny,
	"Tiny dripstone",
	"A thick layer of dripstone.",
	dry_dripstone_tiles,
	dry_dripstone_spike,
	2
)
make_dripstone(
	hardened_dripstone_tiny,
	"Tiny hardened dripstone",
	"A thick layer of dripstone. It is no longer able to grow or absorb liquids.",
	hardened_dripstone_tiles,
	hardened_dripstone_spike,
	2
)
make_dripstone(
	molten_dripstone_tiny,
	"Tiny molten dripstone",
	"A thick layer of dripstone. It has absorbed some lava, so it is able to grow in thickness.",
	molten_dripstone_tiles,
	dry_dripstone_spike,
	2
)
make_dripstone(
	watered_dripstone_tiny,
	"Tiny watered dripstone",
	"A thick layer of dripstone. It has absorbed some water, so it is able to grow in thickness.",
	watered_dripstone_tiles,
	dry_dripstone_spike,
	2
)

-- DRIPSTONE SPIKE

make_dripstone(
	dry_dripstone_spike,
	"Dripstone spike",
	"A thick layer of dripstone.",
	dry_dripstone_tiles,
	dry_dripstone_spike,
	1
)
make_dripstone(
	hardened_dripstone_spike,
	"Hardened dripstone spike",
	"A thick layer of dripstone. It is no longer able to grow or absorb liquids.",
	hardened_dripstone_tiles,
	hardened_dripstone_spike,
	1
)
make_dripstone(
	molten_dripstone_spike,
	"Molten dripstone spike",
	"A thick layer of dripstone. It has absorbed some lava, so it is able to grow in thickness.",
	molten_dripstone_tiles,
	dry_dripstone_spike,
	1
)
make_dripstone(
	watered_dripstone_spike,
	"Watered dripstone spike",
	"A thick layer of dripstone. It has absorbed some water, so it is able to grow in thickness.",
	watered_dripstone_tiles,
	dry_dripstone_spike,
	1
)

-- ACTIONS

local function absorb_liquid(pos, node, aoc, aocw)
	local node_above = minetest.get_node(vector.offset(pos, 0, 1, 0)) or {}
	local na_name = node_above.name

	for _, water in pairs(internal.water_nodes) do
		if water == na_name then
			-- Make block watery
			node.name = watered_dripstone_block
			minetest.set_node(pos, node)
			return
		end
	end

	for _, lava in pairs(internal.lava_nodes) do
		if lava == na_name then
			-- Make block molten
			node.name = molten_dripstone_block
			minetest.set_node(pos, node)
			return
		end
	end
end

local function drop_down_to(options, dry_up_node_name)
	return function(pos, node, aoc, aocw)
		for i = 1, 25 do
			local pos_rel = vector.offset(pos, 0, -i, 0)
			local node_rel = minetest.get_node(pos_rel) or {}
			local node_name = node_rel.name or ""

			if minetest.get_item_group(node_name, "air") ~= 0 then
				-- Non-air node has been found!
				-- Check if it reacts to the dripstone and if it can be
				-- activated.
				for _, option in pairs(options) do
					if node_name == option.from then
						node_rel.name = option.to
						node.name = dry_up_node_name

						minetest.set_node(pos, node)
						minetest.set_node(pos_rel, node_rel)
						return
					end
				end

				-- The node cannot be changed and hence a new spike starts on top
				-- of it.
				if i > 1 then
					pos_rel = vector.offset(pos, 0, 1-i, 0)
					minetest.set_node(pos_rel, { name = dry_dripstone_spike })

					node.name = dry_up_node_name
					minetest.set_node(pos, node)
				end
				return
			end
		end
	end
end

local function grow_to(dry_grown_node_name)
	return function(pos, node, aoc, aocw)
		node.name = dry_grown_node_name
		minetest.set_node(pos, node)
	end
end

local function harden(harden_nodes_func)
	return function(pos, node, aoc, aocw)
		local node_above = minetest.get_node(vector.offset(pos, 0, 1, 0)) or {}
		local na_name = node_above.name

		for _, hardener in pairs(harden_nodes_func()) do
			if hardener == na_name then
				-- Harden dripstone block
				node.name = hardened_dripstone_block
				minetest.set_node(pos, node)
				return
			end
		end
	end
end

local function trickle_down(options, dry_up_node_name)
	return function(pos, node, aoc, aocw)
		local pos_below = vector.offset(pos, 0, -1, 0)
		local node_below = minetest.get_node(pos_below) or {}
		local nb_name = node_below.name or ""

		for _, option in pairs(options) do
			local expected_node_name = option.from or nil
			local resulted_node_name = option.to

			if nb_name == expected_node_name then
				node.name = dry_up_node_name
				node_below.name = resulted_node_name

				minetest.set_node(pos, node)
				minetest.set_node(pos_below, node_below)
				return
			end
		end
	end
end

local function make_abm(nodename, expected_duration, action)
	minetest.register_abm(
		{ nodenames = { nodename }
		, interval = expected_duration / samples_per_interval
		, chance = samples_per_interval
		, catch_up = true
		, action = action
	}
)
end

-- ABSORB LIQUIDS

make_abm(dry_dripstone_block, seconds_per_water_trickle, absorb_liquid)
make_abm(molten_dripstone_block, seconds_per_lava_trickle, harden(function ()
	return internal.water_nodes
end))
make_abm(watered_dripstone_block, seconds_per_water_trickle, harden(function ()
	return internal.lava_nodes
end))

-- TRICKLE DOWN

make_abm(molten_dripstone_block, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_block))
make_abm(watered_dripstone_block, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_block))
make_abm(molten_dripstone_huge, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_huge))
make_abm(watered_dripstone_huge, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_huge))
make_abm(molten_dripstone_large, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_large))
make_abm(watered_dripstone_large, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_large))
make_abm(molten_dripstone_great, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_great))
make_abm(watered_dripstone_great, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_great))
make_abm(molten_dripstone_medium, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_medium))
make_abm(watered_dripstone_medium, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_medium))
make_abm(molten_dripstone_small, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_small))
make_abm(watered_dripstone_small, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_small))
make_abm(molten_dripstone_tiny, seconds_per_lava_trickle, trickle_down(lava_trickle_down, dry_dripstone_tiny))
make_abm(watered_dripstone_tiny, seconds_per_water_trickle, trickle_down(water_trickle_down, dry_dripstone_tiny))
make_abm(molten_dripstone_spike, seconds_per_lava_trickle, trickle_down(lava_trickle_down_spike, dry_dripstone_spike))
make_abm(watered_dripstone_spike, seconds_per_water_trickle, trickle_down(water_trickle_down_spike, dry_dripstone_spike))

-- GROW

make_abm(molten_dripstone_large, seconds_per_growth*(14*14 - 12*12), grow_to(dry_dripstone_huge))
make_abm(watered_dripstone_large, seconds_per_growth*(14*14 - 12*12), grow_to(dry_dripstone_huge))
make_abm(molten_dripstone_great, seconds_per_growth*(12*12 - 10*10), grow_to(dry_dripstone_large))
make_abm(watered_dripstone_great, seconds_per_growth*(12*12 - 10*10), grow_to(dry_dripstone_large))
make_abm(molten_dripstone_medium, seconds_per_growth*(10*10 - 8*8), grow_to(dry_dripstone_great))
make_abm(watered_dripstone_medium, seconds_per_growth*(10*10 - 8*8), grow_to(dry_dripstone_great))
make_abm(molten_dripstone_small, seconds_per_growth*(8*8 - 6*6), grow_to(dry_dripstone_medium))
make_abm(watered_dripstone_small, seconds_per_growth*(8*8 - 6*6), grow_to(dry_dripstone_medium))
make_abm(molten_dripstone_tiny, seconds_per_growth*(6*6 - 4*4), grow_to(dry_dripstone_small))
make_abm(watered_dripstone_tiny, seconds_per_growth*(6*6 - 4*4), grow_to(dry_dripstone_small))
make_abm(molten_dripstone_spike, seconds_per_growth*(4*4 - 2*2), grow_to(dry_dripstone_tiny))
make_abm(watered_dripstone_spike, seconds_per_growth*(4*4 - 2*2), grow_to(dry_dripstone_tiny))

-- DROP DOWN

make_abm(molten_dripstone_spike, seconds_per_lava_trickle, drop_down_to(internal.lava_cauldrons, dry_dripstone_spike))
make_abm(watered_dripstone_spike, seconds_per_water_trickle, drop_down_to(internal.water_cauldrons, dry_dripstone_spike))

-- CRATING RECIPES

local function make_recipe(border, middle, output)
	minetest.register_craft({
		output = output,
		recipe = {
			{ border, border, border },
			{ border, middle, border },
			{ border, border, border },
		}
	})
end

make_recipe(dry_dripstone_spike, dry_dripstone_spike, dry_dripstone_tiny)
make_recipe(dry_dripstone_spike, dry_dripstone_tiny, dry_dripstone_small)
make_recipe(dry_dripstone_spike, dry_dripstone_small, dry_dripstone_medium)
make_recipe(dry_dripstone_spike, dry_dripstone_medium, dry_dripstone_great)
make_recipe(dry_dripstone_spike, dry_dripstone_great, dry_dripstone_large)
make_recipe(dry_dripstone_spike, dry_dripstone_large, dry_dripstone_huge)
make_recipe(hardened_dripstone_spike, hardened_dripstone_spike, hardened_dripstone_tiny)
make_recipe(hardened_dripstone_spike, hardened_dripstone_tiny, hardened_dripstone_small)
make_recipe(hardened_dripstone_spike, hardened_dripstone_small, hardened_dripstone_medium)
make_recipe(hardened_dripstone_spike, hardened_dripstone_medium, hardened_dripstone_great)
make_recipe(hardened_dripstone_spike, hardened_dripstone_great, hardened_dripstone_large)
make_recipe(hardened_dripstone_spike, hardened_dripstone_large, hardened_dripstone_huge)
make_recipe(molten_dripstone_spike, molten_dripstone_spike, molten_dripstone_tiny)
make_recipe(molten_dripstone_spike, molten_dripstone_tiny, molten_dripstone_small)
make_recipe(molten_dripstone_spike, molten_dripstone_small, molten_dripstone_medium)
make_recipe(molten_dripstone_spike, molten_dripstone_medium, molten_dripstone_great)
make_recipe(molten_dripstone_spike, molten_dripstone_great, molten_dripstone_large)
make_recipe(molten_dripstone_spike, molten_dripstone_large, molten_dripstone_huge)
make_recipe(watered_dripstone_spike, watered_dripstone_spike, watered_dripstone_tiny)
make_recipe(watered_dripstone_spike, watered_dripstone_tiny, watered_dripstone_small)
make_recipe(watered_dripstone_spike, watered_dripstone_small, watered_dripstone_medium)
make_recipe(watered_dripstone_spike, watered_dripstone_medium, watered_dripstone_great)
make_recipe(watered_dripstone_spike, watered_dripstone_great, watered_dripstone_large)
make_recipe(watered_dripstone_spike, watered_dripstone_large, watered_dripstone_huge)

noordstar_dripstone.add_lava_catcher("mcl_cauldrons:cauldron", "mcl_cauldrons:cauldron_1_lava")
noordstar_dripstone.add_lava_catcher("mcl_cauldrons:cauldron_1_lava", "mcl_cauldrons:cauldron_2_lava")
noordstar_dripstone.add_lava_catcher("mcl_cauldrons:cauldron_2_lava", "mcl_cauldrons:cauldron_3_lava")

noordstar_dripstone.add_water_catcher("mcl_cauldrons:cauldron", "mcl_cauldrons:cauldron_1")
noordstar_dripstone.add_water_catcher("mcl_cauldrons:cauldron_1", "mcl_cauldrons:cauldron_2")
noordstar_dripstone.add_water_catcher("mcl_cauldrons:cauldron_2", "mcl_cauldrons:cauldron_3")

if minetest.get_modpath("mclx_core") then
    noordstar_dripstone.add_water_catcher("mcl_cauldrons:cauldron", "mcl_cauldrons:cauldron_1r")
    noordstar_dripstone.add_water_catcher("mcl_cauldrons:cauldron_1r", "mcl_cauldrons:cauldron_2r")
    noordstar_dripstone.add_water_catcher("mcl_cauldrons:cauldron_2r", "mcl_cauldrons:cauldron_3r")
end