local log = require "util.logger".init("modulemanager")

local loadfile, pcall = loadfile, pcall;

local setmetatable, setfenv, getfenv = setmetatable, setfenv, getfenv;

local pairs, ipairs = pairs, ipairs;

local type = type;

local tostring, print = tostring, print;

local _G = _G;

module "modulemanager"

local handler_info = {};

local handlers = {};

local modulehelpers = setmetatable({}, { __index = _G });

function modulehelpers.add_iq_handler(origin_type, xmlns, handler)

	handlers[origin_type] = handlers[origin_type] or {};

	handlers[origin_type].iq = handlers[origin_type].iq or {};

	if not handlers[origin_type].iq[xmlns] then

		handlers[origin_type].iq[xmlns]= handler;

		handler_info[handler] = getfenv(2).module;

		log("debug", "mod_%s now handles iq,%s", getfenv(2).module.name, xmlns);

	else

		log("warning", "mod_%s wants to handle iq,%s but mod_%s already handles that", getfenv(2).module.name, xmlns, handler_info[handlers[origin_type].iq[xmlns]].module.name);

	end

end

function modulehelpers.add_presence_handler(origin_type, handler)

end

function modulehelpers.add_message_handler(origin_type, handler)

end

function loadall()

	load("legacyauth");

	load("roster");

end

function load(name)

	local mod, err = loadfile("plugins/mod_"..name..".lua");

	if not mod then

		log("error", "Unable to load module '%s': %s", name or "nil", err or "nil");

		return;

	end

	local pluginenv = setmetatable({ module = { name = name } }, { __index = modulehelpers });

	setfenv(mod, pluginenv);

	local success, ret = pcall(mod);

	if not success then

		log("error", "Error initialising module '%s': %s", name or "nil", ret or "nil");

		return;

	end

end

function handle_stanza(origin, stanza)

	local name, origin_type = stanza.name, origin.type;

	if name == "iq" then

		log("debug", "Stanza is an <iq/>");

		local child = stanza.tags[1];

		if child then

			local xmlns = child.attr.xmlns;

			log("debug", "Stanza has xmlns: %s", xmlns);

			local handler = handlers[origin_type][name][xmlns];

			if  handler then

				log("debug", "Passing stanza to mod_%s", handler_info[handler].name);

				return handler(origin, stanza) or true;

			end

		end

	end

	log("debug", "Stanza unhandled by any modules");

	return false; -- we didn't handle it

end