local jid = require "util.jid";

local json = require "util.json";

local promise = require "util.promise";

local st = require "util.stanza";

local uuid = require "util.uuid";

local xmlns_cmd = "http://jabber.org/protocol/commands";

module:hook("muc-disco#info", function(event)

	event.reply:tag("feature", {var = xmlns_cmd}):up();

end);

module:hook("iq-get/bare/http://jabber.org/protocol/disco#items:query", function (event)

	local room = prosody.hosts[module:get_host()].modules.muc.get_room_from_jid(event.stanza.attr.to);

	local occupant = room:get_occupant_by_real_jid(event.stanza.attr.from)

	if event.stanza.tags[1].attr.node ~= xmlns_cmd or not occupant then

		return

	end

	local bots = module:get_option_array("adhoc_bots", {})

	bots:map(function(bot)

		return module:send_iq(

			st.iq({ type = "get", id = uuid.generate(), to = bot, from = room:get_occupant_jid(event.stanza.attr.from) })

				:tag("query", { xmlns = "http://jabber.org/protocol/disco#items", node = xmlns_cmd }):up(),

			nil,

			5

		)

	end)

	promise.all_settled(bots):next(function (bot_commands)

		local reply = st.reply(event.stanza):query("http://jabber.org/protocol/disco#items")

		for i, one_bot_reply in ipairs(bot_commands) do

			if one_bot_reply.status == "fulfilled"	then

			local query = one_bot_reply.value.stanza:get_child("query", "http://jabber.org/protocol/disco#items")

				if query then

					-- Should use query:childtags("item") but it doesn't work

					for j,item in ipairs(query.tags) do

						item.attr.node = json.encode({ jid = item.attr.jid, node = item.attr.node })

						item.attr.jid = event.stanza.attr.to

					end

				end

			end

		end

		event.origin.send(reply:up())

	end):catch(function (e)

		module:log("error", e)

	end)

	return true;

end, 500);

local function is_adhoc_bot(jid)

	for i, bot_jid in ipairs(module:get_option_array("adhoc_bots", {})) do

		if jid == bot_jid then

			return true

		end

	end

	return false

end

module:hook("iq-set/bare/"..xmlns_cmd..":command", function (event)

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

	local node = stanza.tags[1].attr.node

	local meta = json.decode(node)

	local room = prosody.hosts[module:get_host()].modules.muc.get_room_from_jid(stanza.attr.to);

	local occupant = room:get_occupant_by_real_jid(event.stanza.attr.from)

	if meta and occupant and is_adhoc_bot(meta.jid) then

		local fwd = st.clone(stanza)

		fwd.attr.to = meta.jid

		fwd.attr.from = room:get_occupant_jid(event.stanza.attr.from)

		local command = fwd:get_child("command", "http://jabber.org/protocol/commands")

		command.attr.node = meta.node

		module:send_iq(fwd):next(function(response)

			local response_command = response.stanza:get_child("command", "http://jabber.org/protocol/commands")

			response.stanza.attr.from = stanza.attr.to

			response.stanza.attr.to = stanza.attr.from

			response_command.attr.node = node

			origin.send(response.stanza)

		end):catch(function (e)

			module:log("error", e)

		end)

		return true

	end

	return

end, 500);

local function clean_xmlns(node)

		-- Recursively remove "jabber:client" attribute from node.

		-- In Prosody internal routing, xmlns should not be set.

		-- Keeping xmlns would lead to issues like mod_smacks ignoring the outgoing stanza,

		-- so we remove all xmlns attributes with a value of "jabber:client"

		if node.attr.xmlns == 'jabber:client' then

				for childnode in node:childtags() do

						clean_xmlns(childnode)

				end

				node.attr.xmlns = nil

		end

end

module:hook("message/bare", function (event)

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

	if not is_adhoc_bot(stanza.attr.from) then return; end

	local room = prosody.hosts[module:get_host()].modules.muc.get_room_from_jid(stanza.attr.to);

	if room == nil then return; end

	local privilege = stanza:get_child("privilege", "urn:xmpp:privilege:2")

	if privilege == nil then return; end

	local fwd = privilege:get_child("forwarded", "urn:xmpp:forward:0")

	if fwd == nil then return; end

	local message = fwd:get_child("message", "jabber:client")

	if message == nil then return; end

	if message.attr.to ~= stanza.attr.to or jid.bare(message.attr.from) ~= stanza.attr.to then

		return

	end

	clean_xmlns(message)

	room:broadcast_message(message)

	return true

end)