local jid_bare = require "util.jid".bare;

local st = require "util.stanza";

local rooms = assert(module:depends"muc".rooms, "This module is not needed with Prosody >=0.11");

module:hook("presence/full", function (event)

	local stanza, origin = event.stanza, event.origin;

	if stanza.attr.type ~= nil then return end

	local muc_x = stanza:get_child("x", "http://jabber.org/protocol/muc");

	local room_jid = jid_bare(stanza.attr.to);

	local room = rooms[room_jid];

	if not room then

		if muc_x then

			-- Normal MUC creation

		else

			module:log("info", "GC 1.0 room creation from %s", stanza.attr.from);

			module:send(st.iq({type="get",id=module.name,from=module.host,to=stanza.attr.from}):query("jabber:iq:version"));

		end

		return;

	end

	local current_nick = room._jid_nick[stanza.attr.from];

	if current_nick then

		-- present

		if muc_x then

			module:log("info", "MUC desync with %s", stanza.attr.from);

			module:send(st.iq({type="get",id=module.name,from=module.host,to=stanza.attr.from}):query("jabber:iq:version"));

		else

			-- normal presence update

		end

	else

		-- joining

		if muc_x then

			-- normal join

		else

			module:log("info", "GC 1.0 join from %s", stanza.attr.from);

			module:send(st.iq({type="get",id=module.name,from=module.host,to=stanza.attr.from}):query("jabber:iq:version"));

		end

	end

end);

module:hook("iq-result/host/"..module.name, function (event)

	local stanza, origin = event.stanza, event.origin;

	local version = stanza:get_child("query", "jabber:iq:version");

	if not version then

		module:log("info", "%s replied with an invalid version reply: %s", stanza.attr.from, tostring(stanza));

		return true;

	end

	module:log("info", "%s is running: %s %s", stanza.attr.from, version:get_child_text("name"), version:get_child_text("version"));

end);

module:hook("iq-error/host/"..module.name, function (event)

	local stanza, origin = event.stanza, event.origin;

	module:log("info", "%s replied with an error: %s %s", stanza.attr.from, stanza:get_error());

	return true;

end);