local minetest,vector = minetest,vector
local hud_item_name = ""
local all_nodes
local hud_bg = minetest.localplayer:hud_add({
				hud_elem_type = "image", -- see HUD element types, default "text"
				position = {x=0.5, y=0},
				name = "",    -- default ""
				scale = {x=2.25, y=2.25}, -- default {x=0,y=0}
				text = "waila.png",    -- default ""
				offset = { x = 0, y = 29.25},
				z_index = 0,
			})

local hud_name = minetest.localplayer:hud_add({
		name = "hud_name",
		position = {x=0.5,y=0},
		hud_elem_type = "text",
		number = 0xFFFFFF,
		alignment = 0,
		offset = { x = 0, y = 17},
		text = "",
		z_index = 1,
	})
local hud_node = minetest.localplayer:hud_add({
		name = "hud_node",
		position = {x=0.5,y=0},
		hud_elem_type = "text",
		number = 0xFFFFFF,
		alignment = 0,
		offset = { x = 0, y = 36},
		text = "",
		z_index = 1,
	})


local waih_name = minetest.localplayer:hud_add({
	name = "hud_name",
	position = {x=0.5,y=1},
	hud_elem_type = "text",
	number = 0xFFFFFF,
	alignment = 0,
	offset = { x = 0, y = -150},
	text = "",
	z_index = 1,
})


local pos_min = 10
local pos_max = -150
local waih_timer = 0
local old_item = ""

local function update()

	if all_nodes then
		--waila
		if minetest.camera then
			local pos = minetest.camera:get_pos()
			local pos2 = vector.add(pos,vector.multiply(minetest.camera:get_look_dir(), 4))
			local ray = minetest.raycast(pos, pos2, false, false)
			
			local pointed_thing = ray:next()
			if pointed_thing and pointed_thing.under and all_nodes[minetest.get_node_or_nil(pointed_thing.under).name] then
				local node = minetest.get_node_or_nil(pointed_thing.under).name
				if hud_item_name ~= node then
					local def = minetest.get_item_def(node)
					minetest.localplayer:hud_change(hud_name, "text", def.description)
					minetest.localplayer:hud_change(hud_node, "text", node)
					minetest.localplayer:hud_change(hud_bg,   "text", "waila.png")
					hud_item_name = node
				end
			else
				--make hud invisible
				minetest.localplayer:hud_change(hud_name, "text", "")
				minetest.localplayer:hud_change(hud_node, "text", "")
				minetest.localplayer:hud_change(hud_bg,   "text", "")
				hud_item_name = ""
			end
		end

		
		--waih
		local item = minetest.localplayer:get_wielded_item():get_name()
		if waih_timer > 0 then
			waih_timer = waih_timer - 0.01
			if waih_timer <= 0 then
				waih_timer = 0
				minetest.localplayer:hud_change(waih_name, "text", "")
			end
		end
		if item ~= old_item then
			waih_timer = 1
			local waih_text
			if all_nodes[item] then
				waih_text = minetest.get_item_def(item).description or item
			else
				waih_text = "Unknown"
			end
			minetest.localplayer:hud_change(waih_name, "text", waih_text)
		end
		old_item = item
	elseif nodes then
		all_nodes = table.copy(nodes)
	end


	minetest.after(0.01, function()
		update()
	end)
end

update()