# -*- coding: utf-8 -*-

############################
# Controller static module #
############################

# Imports
from tubot.torrent.abc import TorrentAPI, TorrentObj
from tubot.dirgetter.abc import DirGetter
from tubot.db.abc import CacheDB
from tubot.db.types import User, UserStates
from tubot.static.functions import validate
from tubot.static.env import AUTH_PASSWD
from tubot.static.exceptions import AlreadyExists, AuthError


class Controller(object):
    """
    Controller object
    """

    torrent: TorrentAPI
    getter: DirGetter
    cache: CacheDB

    def __init__(self, torrent_api: TorrentAPI, dg: DirGetter, cache: CacheDB) -> None:
        """
        :param torrent_api: TorrentAPI module
        :param dg: DirectoryGetter module
        :param cache: CacheDB module
        """
        self.torrent = torrent_api
        self.getter = dg
        self.cache = cache

    # DG

    async def get_dirs(self) -> dict:
        """
        Returns dict of dirs from cache / dg
        """
        dirs = await self.cache.get_dirs
        if len(dirs) > 0:
            return dirs
        dirs = await self.getter.folders
        if len(dirs) > 0:
            return dirs
        raise KeyError("No dirs found")

    # Torrent

    async def upload_torrent(self, torrent: TorrentObj) -> None:
        """
        Add torrent to query

        :param torrent: Torrent object
        """
        await validate(torrent, "Wrong torrent object")
        await self.torrent.upload(torrent)

    async def get_torrent_list(self) -> str:
        """
        Returns message with current torrents list
        """
        return await self.torrent.torrent_list

    # Users

    async def _create_user(self, tg_id: int, name: str) -> User:
        """
        Creates user in database

        :param tg_id: Telegram id
        :param name: Telegram profile name
        """
        user_obj = User(tg_id=tg_id, name=name)
        await self.cache.write_user(tg_id, user_obj)
        return user_obj

    async def _get_user_from_db(self, tg_id: int) -> User:
        """
        Gets user from database

        :param tg_id: Telegram id
        """
        return await self.cache.read_user(tg_id)

    async def get_user(self, tg_id: int, name: str) -> User:
        """
        Returns user object

        :param tg_id: Telegram id
        :param name: Telegram profile name
        """
        if await self.cache.chech_user_existing(tg_id):
            return await self._get_user_from_db(tg_id)
        return await self._create_user(tg_id, name)

    async def auth_user(self, user: User, pwd: str) -> None:
        """
        Auth user

        :param user: Current user object
        """
        if user.auth:
            raise AlreadyExists("You already auth")
        if pwd == AUTH_PASSWD()():
            user.auth = True
            await self.cache.write_user(user.tg_id, user)
        raise AuthError("Wrong password")

    async def set_user_state(self, user: User, state: UserStates) -> None:
        """
        Change user status

        :param user: Current user object
        :param state: New user status
        """
        user.state = state
        await self.cache.write_user(user.tg_id, user)