"""
    Slixmpp: The Slick XMPP Library
    Copyright (C) 2020 Mathieu Pasquet
    This file is part of Slixmpp.

    See the file LICENSE for copying permission.
"""
from typing import Iterable

from slixmpp import JID
from slixmpp.plugins import BasePlugin
from slixmpp.stanza import Message
from slixmpp.xmlstream import register_stanza_plugin
from slixmpp.xmlstream.matcher import StanzaPath
from slixmpp.xmlstream.handler import Callback

from slixmpp.plugins.xep_0444 import stanza


class XEP_0444(BasePlugin):
    name = 'xep_0444'
    description = 'XEP-0444: Message Reactions'
    dependencies = {'xep_0030', 'xep_0334'}
    stanza = stanza
    namespace = stanza.NS

    def plugin_init(self):
        self.xmpp.register_handler(Callback(
            'Reaction received',
            StanzaPath("message/reactions"),
            self._handle_reactions,
        ))
        register_stanza_plugin(Message, stanza.Reactions)
        register_stanza_plugin(stanza.Reactions, stanza.Reaction, iterable=True)

    def session_bind(self, event):
        self.xmpp['xep_0030'].add_feature(stanza.NS)

    def plugin_end(self):
        self.xmpp.remove_handler('Reaction received')
        self.xmpp['xep_0030'].del_feature(stanza.NS)

    def _handle_reactions(self, message: Message):
        self.xmpp.event('reactions', message)

    def send_reactions(self, to: JID, to_id: str, reactions: Iterable[str], *, store=True):
        """Send reactions related to a message"""
        msg = self.xmpp.make_message(mto=to)
        self.set_reactions(msg, to_id, reactions)
        if store:
            msg.enable('store')
        msg.send()

    @staticmethod
    def set_reactions(message: Message, to_id: str, reactions: Iterable[str]):
        """Add reactions to a Message object."""
        message['reactions']['id'] = to_id
        for reaction in reactions:
            reaction_stanza = stanza.Reaction()
            reaction_stanza['value'] = reaction
            message['reactions'].append(reaction_stanza)
