""" Respond to commands """

import telethon
import telethon.utils

import pgbotlib.dbstuff
import pgbotlib.misc
import pgbotlib.response


# TODO: quote via response?
# chat = await event.get_chat()
# result = await client.get_messages(chat.id,
#   ids=[event.message.reply_to.reply_to_msg_id])
# print(result)
class Commander:
    T_START = frozenset(['cmd_start'])
    T_START_E = frozenset(['cmd_start_enabled'])
    T_STOP = frozenset(['cmd_stop'])
    T_STOP_D = frozenset(['cmd_stop_disabled'])
    NOPE = "а ты что ещё за хуй с горы?"
    YEP = "да, господин!"
    DOC = """
    Команды:
        __.start__
            запустить бота
        __.stop__
            остановить бота
        __.list__
            перечислить доступные токены
        __.regex token__
            перечислить регулярные выражения, относящиеся к токену
        __.chat__
            получить id текущего чата
        __.users__
            перечислить id пользователей
        __.add token1[,token2,...] your phrase here__
            добавить фразу your phrase here для реакции на токены
        __.adduser id имя__
            добавить пользователю имя
        __.help__
            вывести этот текст
    """

    def __init__(self, config: dict,
                 client: telethon.TelegramClient,
                 admins: list,
                 db_conn: pgbotlib.dbstuff.DBConn,
                 namegen: pgbotlib.misc.NameGenerator,
                 responder: pgbotlib.response.Responder) -> None:
        self.chats = config['chats']
        self.client = client
        self.admins = admins
        self.db_conn = db_conn
        self.namegen = namegen
        self.responder = responder
        self.available_tokens = [
                str(token) for token, _ in self.responder.tokens]

    def __add_response(self, caller: int, command: str) -> bool:
        if caller not in self.admins:
            return self.NOPE
        DB_QUERY = 'INSERT INTO responses (tokens, response) values (%s,%s)'
        try:
            input_tokens, phrase = command.strip().split(' ', 1)
            input_tokenset = frozenset(input_tokens.split(','))
            for token in input_tokenset:
                if token not in self.available_tokens:
                    return "token not found!"
            values = (','.join(sorted(input_tokenset)), phrase.strip())
            self.db_conn.update(DB_QUERY, values)
            return self.YEP
        except Exception as e:
            return str(e)

    def __add_user(self, caller: int, userspec: str) -> bool:
        if caller not in self.admins:
            return self.NOPE
        user_id, names = userspec.strip().split(' ', 1)
        for name in names.strip().split(','):
            query = 'INSERT INTO names (tg_id, name) values(%s,%s)'
            values = (user_id, name)
            self.db_conn.update(query, values)
        return self.YEP

    def __start_response(self) -> str:
        if self.responder.is_enabled():
            return self.responder.get_response(self.T_START_E)
        return self.responder.get_response(self.T_START)

    def __stop_response(self) -> str:
        if self.responder.is_enabled():
            return self.responder.get_response(self.T_STOP)
        return self.responder.get_response(self.T_STOP_D)

    def __list_users(self, users: list) -> str:
        userlist = [f'{user.id}: {self.namegen.get_tg_name(user)}'
                    for user in users]
        return '\n'.join(userlist)

    def __list_regex(self, token: str) -> str:
        for t, r in self.responder.tokens:
            if token == t:
                regexlist = [i.pattern for i in r]
                return '\n'.join(regexlist)
        return 'not found!'

    async def action(self,
                     event: telethon.events.common.EventBuilder) -> None:
        chat_id = telethon.utils.get_peer_id(event.message.peer_id)
        if chat_id not in self.chats:
            return None
        command = event.message.text
        sender = await event.get_sender()
        match command:
            case '.chat':
                response = str(chat_id)
            case '.list':
                response = ', '.join(self.available_tokens)
            case '.users':
                users = await self.client.get_participants(
                        entity=event.message.peer_id)
                response = self.__list_users(users)
            case '.start':
                response = self.__start_response()
                self.responder.enable()
            case '.stop':
                response = self.__stop_response()
                self.responder.disable()
            case '.help':
                response = self.DOC
            case command if command.startswith('.add '):
                response = self.__add_response(sender.id, command[5:])
            case command if command.startswith('.adduser '):
                try:
                    response = self.__add_user(sender.id, command[9:])
                except Exception as e:
                    response = str(e)
            case command if command.startswith('.regex '):
                response = self.__list_regex(command[7:].strip())
            case _:
                return None
        await self.client.send_message(event.message.peer_id, response)