# This file is part of Ascii Emoji.
#
# Copyright (C) 2021  Arthur Bols <arthur@bols.dev>
#
# Ascii Emoji is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ascii Emoji 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ascii Emoji.  If not, see <https://www.gnu.org/licenses/>.

import re

from ascii_emoji.ascii_emoticons_data import ascii_emoticons_data
from gajim.common import ged
from gajim.plugins import GajimPlugin
from gajim.plugins.helpers import log_calls
from gajim.plugins.plugins_i18n import _


class AsciiEmojiPlugin(GajimPlugin):

    @log_calls('AsciiEmojiPlugin')
    def init(self):
        self.description = _('Replaces ascii emoticons with emoji.')
        self.config_dialog = None

        self.events_handlers = {
            'decrypted-message-received': (ged.PREGUI1,
                                           self._decrypted_message_received),
            'gc-message-received': (ged.PREGUI1, self._gc_message_received),
        }

        self.emoticon_regex = re.compile(ascii_emoticons_data.get_regex())

    @log_calls('AsciiEmojiPlugin')
    def _replace(self, obj):
        if not obj.msgtxt:
            return
        iterator = self.emoticon_regex.finditer(obj.msgtxt)
        new_msgtxt = ''
        prev_repl = 0
        for match in iterator:
            start, end = match.span()
            ascii_text = obj.msgtxt[start:end]
            emoji = ascii_emoticons_data.get(ascii_text, None)

            if emoji is not None:
                new_msgtxt += obj.msgtxt[prev_repl:start] + emoji
                prev_repl = end
        obj.msgtxt = new_msgtxt + obj.msgtxt[prev_repl:]

    @log_calls('AsciiEmojiPlugin')
    def _decrypted_message_received(self, obj):
        self._replace(obj)

    @log_calls('AsciiEmojiPlugin')
    def _gc_message_received(self, obj):
        self._replace(obj)