cmsg = {}
cmsg.hudids = {}
cmsg.active_messages = {}

cmsg.default_color = 0xFFFFFF

cmsg.push_message_player = function(player, text, color)
	local pname = player:get_player_name()
	if color == nil then color = cmsg.default_color end
	if cmsg.hudids[pname] == nil then
		cmsg.hudids[pname] = {}
		cmsg.active_messages[pname] = 0
	else
		-- move older HUD IDs up
		for hudid,tbl in pairs(cmsg.hudids[pname]) do
			minetest.after(0, function()
				tbl.stackpos = tbl.stackpos + 1
				player:hud_change(hudid, "offset", {x=0,y=-128-(18*tbl.stackpos)})
			end)
		end
	end
	local hudid = player:hud_add({
		hud_elem_type = "text",
		text = text,
		number = color,
		position = {x=0.5, y=0.5},
		offset = {x=0,y=-128},
		direction = 0,
		alignment = {x=0,y=0},
		scale = {x=300,y=18},
	})

	cmsg.hudids[pname][hudid] = {stackpos=0}
	cmsg.active_messages[pname] = cmsg.active_messages[pname] + 1

	minetest.after(5, function(param)
		local pname = param.player:get_player_name()
		param.player:hud_remove(param.hudid)
		cmsg.hudids[pname][param.hudid] = nil
		cmsg.active_messages[pname] = cmsg.active_messages[pname] - 1
	end, {player=player, hudid = hudid})
end

cmsg.push_message_all = function(text, color)
	local players = minetest.get_connected_players()
	for i=1,#players do
		cmsg.push_message_player(players[i], text, color)
	end
end

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