woodnt = {}

minetest.register_node("woodnt:treent",{
	description = "Treen't",
	tiles = {
		"default_tree.png^[invert:rgb",
	},
	groups = {
		cracky = 3,
	},
})

minetest.register_node("woodnt:woodnt",{
	description = "Woodn't Planks",
	tiles = {
		"default_wood.png^[invert:rgb",
	},
	groups = {
		cracky = 3,
	},
})

minetest.register_node("woodnt:leavesnt",{
	description = "Leavesn't",
	tiles = {
		"default_leaves.png^[invert:rgb",
	},
	groups = {
		snappy = 3,
	},
	drawtype = "glasslike",
	paramtype = "light",
	light_source = 8,
	drop = {
		max_items = 1,
		items = {
			{
				rarity = 10,
				items = {"woodnt:leavesnt"},
			},
			{
				rarity = 1,
				items = {"woodnt:saplingnt"},
			},

		}
	},
})

local random = math.random

function woodnt.can_grow(pos)
	local node_under = minetest.get_node_or_nil({x = pos.x, y = pos.y + 1, z = pos.z})
	if not node_under then
		return false
	end
	if minetest.get_item_group(node_under.name, "soil") > 0 then
		return false
	end
	local light_level = minetest.get_node_light(pos)
	if not light_level or light_level > 10 then
		return false
	end
	return true
end

local function add_trunk_and_leaves(data, a, pos, tree_cid, leaves_cid,
		height, size, iters, is_apple_tree)
	local x, y, z = pos.x, pos.y, pos.z
	local c_air = minetest.get_content_id("air")
	local c_ignore = minetest.get_content_id("ignore")
	local c_apple = minetest.get_content_id("default:apple")

	-- Trunk
	data[a:index(x, y, z)] = tree_cid -- Force-place lowest trunk node to replace sapling
	for yy = y-height-1,y - 1 do
		local vi = a:index(x, yy, z)
		local node_id = data[vi]
		if node_id == c_air or node_id == c_ignore or node_id == leaves_cid then
			data[vi] = tree_cid
		end
	end

	-- Force leaves near the trunk
	for z_dist = -1, 1 do
	for y_dist = -size, 1 do
		local vi = a:index(x - 1, y - height - y_dist, z + z_dist)
		for x_dist = -1, 1 do
			if data[vi] == c_air or data[vi] == c_ignore then
				if is_apple_tree and random(1, 8) == 1 then
					data[vi] = c_apple
				else
					data[vi] = leaves_cid
				end
			end
			vi = vi + 1
		end
	end
	end

	-- Randomly add leaves in 2x2x2 clusters.
	for i = 1, iters do
		local clust_x = x + random(-size, size - 1)
		local clust_y = y - height + random(-size, 0)
		local clust_z = z + random(-size, size - 1)

		for xi = 0, 1 do
		for yi = 0, 1 do
		for zi = 0, 1 do
			local vi = a:index(clust_x + xi, clust_y + yi, clust_z + zi)
			if data[vi] == c_air or data[vi] == c_ignore then
				if is_apple_tree and random(1, 8) == 1 then
					data[vi] = c_apple
				else
					data[vi] = leaves_cid
				end
			end
		end
		end
		end
	end
end

function woodnt.grow_tree(pos, is_apple_tree, bad)
	--[[
		NOTE: Tree-placing code is currently duplicated in the engine
		and in games that have saplings; both are deprecated but not
		replaced yet
	--]]
	if bad then
		error("Deprecated use of default.grow_tree")
	end

	local x, y, z = pos.x, pos.y, pos.z
	local height = random(4, 5)
	local c_tree = minetest.get_content_id("woodnt:treent")
	local c_leaves = minetest.get_content_id("woodnt:leavesnt")

	local vm = minetest.get_voxel_manip()
	local minp, maxp = vm:read_from_map(
		{x = x - 2, y = y, z = z - 2},
		{x = x + 2, y = y - height - 1, z = z + 2}
	)
	local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
	local data = vm:get_data()

	add_trunk_and_leaves(data, a, pos, c_tree, c_leaves, height, 2, 8, is_apple_tree)

	vm:set_data(data)
	vm:write_to_map()
	vm:update_map()
end

function woodnt.grow_sapling(pos)
	if not woodnt.can_grow(pos) then
		minetest.get_node_timer(pos):start(30)
		return
	end
	woodnt.grow_tree(pos)
end

minetest.register_node("woodnt:saplingnt",{
	description = "Saplingn't",
	tiles = {
		"default_sapling.png^[invert:rgb^[transformFY",
	},
	groups = {
		snappy = 1,
	},
	drawtype = "plantlike",
	paramtype = "light",
	on_timer = woodnt.grow_sapling,
	on_construct = function(pos)
		minetest.get_node_timer(pos):start(math.random(30, 150))
	end,
})

minetest.register_craft({
	output = "woodnt:woodnt 4",
	recipe = {{"woodnt:treent"}},
})