local fall_api = load_file("falling_node")
local attempt_collapse_at = fall_api.attempt_collapse_at



local function attempt_settle_at (pos)
	local below = pos + blockgame.vector.dirs.down
	if minetest.get_node(below).name == "air" then return end

	local def = minetest.registered_nodes[minetest.get_node(pos).name]
	minetest.set_node(pos, {name = def.stable_version})
end

-- settle nodes that are still (in the future, it will take some time for loose nodes that are still to settle).
blockgame.register_abm({
	label = "settle loose nodes",
	nodenames = {"group:loose"},
	interval = 30,
	chance = 10,
	action = attempt_settle_at,
})

local function place_loose_node (itemstack, placer, pointed)
	local result = minetest.item_place(itemstack, placer, pointed)
	attempt_collapse_at(pointed.above)
	return result
end



function blockgame.register_loose_version (name)
	local def = minetest.registered_nodes[name]
	if not def then return false end

	local groups = {}
	for key, value in pairs(def.groups) do
		groups[key] = value
	end
	groups.loose = 1
	groups.can_fall = 1

	blockgame.register_node(name .. "_loose", {
		description = "Loose " .. def.description,
		tiles = def.tiles, -- temporary
		groups = groups,
		on_place = place_loose_node,
		stable_version = name,
	})
	return true
end