local st = require "util.stanza";

local usermanager_user_exists = require "core.usermanager".user_exists;

local usermanager_create_user = require "core.usermanager".create_user;

local datamanager_store = require "util.datamanager".store;

add_iq_handler("c2s", "jabber:iq:register", function (session, stanza)

	if stanza.tags[1].name == "query" then

		local query = stanza.tags[1];

		if stanza.attr.type == "get" then

			local reply = st.reply(stanza);

			reply:tag("query", {xmlns = "jabber:iq:register"})

				:tag("registered"):up()

				:tag("username"):text(session.username):up()

				:tag("password"):up();

			session.send(reply);

		elseif stanza.attr.type == "set" then

			if query.tags[1] and query.tags[1].name == "remove" then

				-- TODO delete user auth data, send iq response, kick all user resources with a <not-authorized/>, delete all user data

				--session.send(st.error_reply(stanza, "cancel", "not-allowed"));

				--return;

				usermanager_create_user(session.username, nil, session.host); -- Disable account

				-- FIXME the disabling currently allows a different user to recreate the account

				-- we should add an in-memory account block mode when we have threading

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

				local roster = session.roster;

				for _, session in pairs(hosts[session.host].sessions[session.username].sessions) do -- disconnect all resources

					session:disconnect({condition = "not-authorized", text = "Account deleted"});

				end

				-- TODO datamanager should be able to delete all user data itself

				datamanager.store(session.username, session.host, "roster", nil);

				datamanager.store(session.username, session.host, "vCard", nil);

				datamanager.store(session.username, session.host, "private", nil);

				datamanager.store(session.username, session.host, "offline", nil);

				local bare = session.username.."@"..session.host;

				for jid, item in pairs(roster) do

					if jid ~= "pending" then

						if item.subscription == "both" or item.subscription == "to" then

							-- TODO unsubscribe

						end

						if item.subscription == "both" or item.subscription == "from" then

							-- TODO unsubscribe

						end

					end

				end

				datamanager.store(session.username, session.host, "accounts", nil); -- delete accounts datastore at the end

			else

				local username = query:child_with_name("username");

				local password = query:child_with_name("password");

				if username and password then

					-- FIXME shouldn't use table.concat

					username = table.concat(username);

					password = table.concat(password);

					if username == session.username then

						if usermanager_create_user(username, password, session.host) then -- password change -- TODO is this the right way?

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

						else

							-- TODO unable to write file, file may be locked, etc, what's the correct error?

							session.send(st.error_reply(stanza, "wait", "internal-server-error"));

						end

					else

						session.send(st.error_reply(stanza, "modify", "bad-request"));

					end

				else

					session.send(st.error_reply(stanza, "modify", "bad-request"));

				end

			end

		end

	else

		session.send(st.error_reply(stanza, "cancel", "service-unavailable"));

	end;

end);

add_iq_handler("c2s_unauthed", "jabber:iq:register", function (session, stanza)

	if stanza.tags[1].name == "query" then

		local query = stanza.tags[1];

		if stanza.attr.type == "get" then

			local reply = st.reply(stanza);

			reply:tag("query", {xmlns = "jabber:iq:register"})

				:tag("instructions"):text("Choose a username and password for use with this service."):up()

				:tag("username"):up()

				:tag("password"):up();

			session.send(reply);

		elseif stanza.attr.type == "set" then

			if query.tags[1] and query.tags[1].name == "remove" then

				session.send(st.error_reply(stanza, "auth", "registration-required"));

			else

				local username = query:child_with_name("username");

				local password = query:child_with_name("password");

				if username and password then

					-- FIXME shouldn't use table.concat

					username = table.concat(username);

					password = table.concat(password);

					if usermanager_user_exists(username, session.host) then

						session.send(st.error_reply(stanza, "cancel", "conflict"));

					else

						if usermanager_create_user(username, password, session.host) then

							session.send(st.reply(stanza)); -- user created!

						else

							-- TODO unable to write file, file may be locked, etc, what's the correct error?

							session.send(st.error_reply(stanza, "wait", "internal-server-error"));

						end

					end

				else

					session.send(st.error_reply(stanza, "modify", "not-acceptable"));

				end

			end

		end

	else

		session.send(st.error_reply(stanza, "cancel", "service-unavailable"));

	end;

end);