local player_hud = { }

local timer = 0

local function floormod(x, y)
	return math.floor(x) % y
end

local function get_time ( )
	local secs = 60*60*24*minetest.get_timeofday()
	local s = floormod(secs, 60)
	local m = floormod(secs/60, 60)
	local h = floormod(secs/3600, 60)
	return ("%02d:%02d:%02d"):format(h, m, s)
end

minetest.register_globalstep(function(dtime)
	timer = timer + dtime
	if timer >= 1.0 then
		timer = 0
		for _, p in ipairs(minetest.get_connected_players()) do
			local name = p:get_player_name()
			local h = player_hud[name]
			if h then
				p:hud_change(h, "text", get_time())
			else
				h = p:hud_add({
					hud_elem_type = "text",
					position = { x=0.35, y=0.900 },
					text = get_time(),
					number = 0xFFFF00,
				})
			end
			player_hud[name] = h
		end
	end
end)

minetest.register_on_leaveplayer(function(player)
	player_hud[player:get_player_name()] = nil
end)