local st = require "util.stanza";

local send = require "core.sessionmanager".send_to_session;

local t_concat = table.concat;

add_iq_handler("c2s_unauthed", "jabber:iq:auth", 

		function (session, stanza)

			local username = stanza.tags[1]:child_with_name("username");

			local password = stanza.tags[1]:child_with_name("password");

			local resource = stanza.tags[1]:child_with_name("resource");

			if not (username and password and resource) then

				local reply = st.reply(stanza);

				send(session, reply:query("jabber:iq:auth")

					:tag("username"):up()

					:tag("password"):up()

					:tag("resource"):up());

				return true;			

			else

				username, password, resource = t_concat(username), t_concat(password), t_concat(resource);

				local reply = st.reply(stanza);

				require "core.usermanager"

				if usermanager.validate_credentials(session.host, username, password) then

					-- Authentication successful!

					local success, err = sessionmanager.make_authenticated(session, username);

					if success then

						success, err = sessionmanager.bind_resource(session, resource);

						--FIXME: Reply with error

						if not success then

							local reply = st.reply(stanza);

							reply.attr.type = "error";

							if err == "conflict" then

								reply:tag("error", { code = "409", type = "cancel" })

									:tag("conflict", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" });

							elseif err == "constraint" then

								reply:tag("error", { code = "409", type = "cancel" })

									:tag("already-bound", { xmlns = "x-lxmppd:extensions:legacyauth" });

							elseif err == "auth" then

								reply:tag("error", { code = "401", type = "auth" })

									:tag("not-authorized", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" });

							end

							send(session, reply);

							return true;

						end

					end

					send(session, st.reply(stanza));

					return true;

				else

					local reply = st.reply(stanza);

					reply.attr.type = "error";

					reply:tag("error", { code = "401", type = "auth" })

						:tag("not-authorized", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" });

					dispatch_stanza(reply);

					return true;

				end

			end

		end);