#!/usr/bin/env python3


# helper class for making a SAT frontend
# Copyright (C) 2009-2021 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 libervia.backend.core.i18n import _
from libervia.backend.core.log import getLogger

log = getLogger(__name__)
from libervia.frontends.tools.jid import JID


class QuickContactManagement(object):
    """This helper class manage the contacts and ease the use of nicknames and shortcuts"""

    ### FIXME: is SàT a better place for all this stuff ??? ###

    def __init__(self):
        self.__contactlist = {}

    def __contains__(self, entity):
        return entity.bare in self.__contactlist

    def clear(self):
        """Clear all the contact list"""
        self.__contactlist.clear()

    def add(self, entity):
        """Add contact to the list, update resources"""
        if entity.bare not in self.__contactlist:
            self.__contactlist[entity.bare] = {"resources": []}
        if not entity.resource:
            return
        if entity.resource in self.__contactlist[entity.bare]["resources"]:
            self.__contactlist[entity.bare]["resources"].remove(entity.resource)
        self.__contactlist[entity.bare]["resources"].append(entity.resource)

    def get_cont_from_group(self, group):
        """Return all contacts which are in given group"""
        result = []
        for contact in self.__contactlist:
            if "groups" in self.__contactlist[contact]:
                if group in self.__contactlist[contact]["groups"]:
                    result.append(JID(contact))
        return result

    def get_attr(self, entity, name):
        """Return a specific attribute of contact, or all attributes
        @param entity: jid of the contact
        @param name: name of the attribute
        @return: asked attribute"""
        if entity.bare in self.__contactlist:
            if name == "status":  # FIXME: for the moment, we only use the first status
                if self.__contactlist[entity.bare]["statuses"]:
                    return list(self.__contactlist[entity.bare]["statuses"].values())[0]
            if name in self.__contactlist[entity.bare]:
                return self.__contactlist[entity.bare][name]
        else:
            log.debug(_("Trying to get attribute for an unknown contact"))
        return None

    def is_connected(self, entity):
        """Tell if the contact is online"""
        return entity.bare in self.__contactlist

    def remove(self, entity):
        """remove resource. If no more resource is online or is no resource is specified, contact is deleted"""
        try:
            if entity.resource:
                self.__contactlist[entity.bare]["resources"].remove(entity.resource)
            if not entity.resource or not self.__contactlist[entity.bare]["resources"]:
                # no more resource available: the contact seems really disconnected
                del self.__contactlist[entity.bare]
        except KeyError:
            log.error(_("INTERNAL ERROR: Key log.error"))
            raise

    def update(self, entity, key, value):
        """Update attribute of contact
        @param entity: jid of the contact
        @param key: name of the attribute
        @param value: value of the attribute
        """
        if entity.bare in self.__contactlist:
            self.__contactlist[entity.bare][key] = value
        else:
            log.debug(_("Trying to update an unknown contact: %s") % entity.bare)

    def get_full(self, entity):
        return entity.bare + "/" + self.__contactlist[entity.bare]["resources"][-1]