#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# SAT plugin for managing xep-245
# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from sat.core.i18n import _
from sat.core.constants import Const as C
from sat.core.log import getLogger
log = getLogger(__name__)


PLUGIN_INFO = {
    "name": "XEP-0245 Plugin",
    "import_name": "XEP-0245",
    "type": "XEP",
    "protocols": ["XEP-0245"],
    "recommendations": [C.TEXT_CMDS],
    "main": "XEP_0245",
    "handler": "no",
    "description": _("""/me syntax handling""")
}


class XEP_0245(object):

    def __init__(self, host):
        log.info(_("Plugin XEP_245 initialization"))
        self.host = host
        try:
            self.host.plugins[C.TEXT_CMDS].registerTextCommands(self)
        except KeyError:
            pass
        host.trigger.add("messageSend", self.MessageSendTrigger)
        host.trigger.add("MessageReceived", self.MessageReceivedTrigger)

    def handleMe(self, mess_data, client):
        """Check if messages starts with "/me " and change them if it is the case

        if several messages (different languages) are presents, they all need to start with "/me "
        if it is for a group chat, resource is used as nick, else roster.getNick is used
        """
        # TODO: XHTML-IM /me are not handled
        for lang, mess in mess_data['message'].iteritems():
            if not mess.startswith('/me '):
                # if not all messages start with "/me", no need to continue
                return mess_data
            try:
                nick = mess_data['nick']
            except KeyError:
                if mess_data['type'] == C.MESS_TYPE_GROUPCHAT:
                    nick = mess_data['nick'] = mess_data['from'].resource
                else:
                    from_jid = mess_data['from']
                    try:
                        ent_type = self.host.memory.getEntityDatum(from_jid.userhostJID(), C.ENTITY_TYPE, client.profile)
                    except KeyError:
                        ent_type = None
                    if ent_type == 'MUC':
                        nick = mess_data['nick'] = from_jid.resource
                    else:
                        nick = mess_data['nick'] = client.roster.getNick(from_jid)
            mess_data.setdefault('me_update', {})[lang] = u"* {}{}".format(nick, mess[3:])

        if 'me_update' in mess_data:
            mess_data['message'].update(mess_data.pop('me_update'))
            mess_data["type"] = C.MESS_TYPE_INFO
            mess_data["extra"][C.MESS_EXTRA_INFO] = "me"
        return mess_data

    def MessageSendTrigger(self, client, data, pre_xml_treatments, post_xml_treatments):
        post_xml_treatments.addCallback(self.handleMe, client)
        return True

    def MessageReceivedTrigger(self, client, message_elt, post_treat):
        """ Check if source is linked and repeat message, else do nothing  """
        post_treat.addCallback(self.handleMe, client)
        return True

    def cmd_me(self, client, mess_data):
        """display a message at third person

        @command (all): message
            - message: message to show at third person
                e.g.: "/me clenches his fist" will give "[YOUR_NICK] clenches his fist"
        """
        # We just ignore the command as the match is done on receiption by clients
        return True