# matrix-appservice-kakaotalk - A Matrix-KakaoTalk puppeting bridge.
# Copyright (C) 2022 Tulir Asokan, Andrew Ferrazzutti
#
# 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 <https://www.gnu.org/licenses/>.
from __future__ import annotations

from typing import TYPE_CHECKING, ClassVar, List, Optional

from asyncpg import Record
from attr import dataclass, field

from mautrix.types import ContentURI, RoomID, UserID
from mautrix.util.async_db import Database

from ..kt.types.bson import Long, to_optional_long
from ..kt.types.channel.channel_type import ChannelType

fake_db = Database.create("") if TYPE_CHECKING else None


@dataclass
class Portal:
    db: ClassVar[Database] = fake_db

    ktid: Long = field(converter=Long)
    kt_receiver: Long = field(converter=Long)
    kt_type: ChannelType
    mxid: Optional[RoomID]
    name: Optional[str]
    description: Optional[str]
    photo_id: Optional[str]
    avatar_url: Optional[ContentURI]
    encrypted: bool
    name_set: bool
    topic_set: bool
    avatar_set: bool
    fully_read_kt_chat: Optional[Long] = field(converter=to_optional_long)
    relay_user_id: Optional[UserID]

    @classmethod
    def _from_row(cls, row: Record) -> Portal:
        return cls(**row)

    @classmethod
    def _from_optional_row(cls, row: Optional[Record]) -> Optional[Portal]:
        return cls._from_row(row) if row is not None else None

    _columns = (
        "ktid, kt_receiver, kt_type, mxid, name, description, photo_id, avatar_url, encrypted, "
        "name_set, avatar_set, fully_read_kt_chat, relay_user_id"
    )

    @classmethod
    async def get_by_ktid(cls, ktid: int, kt_receiver: int) -> Optional[Portal]:
        q = f"SELECT {cls._columns} FROM portal WHERE ktid=$1 AND kt_receiver=$2"
        row = await cls.db.fetchrow(q, ktid, kt_receiver)
        return cls._from_optional_row(row)

    @classmethod
    async def get_by_mxid(cls, mxid: RoomID) -> Optional[Portal]:
        q = f"SELECT {cls._columns} FROM portal WHERE mxid=$1"
        row = await cls.db.fetchrow(q, mxid)
        return cls._from_optional_row(row)

    @classmethod
    async def get_all_by_receiver(cls, kt_receiver: int) -> List[Portal]:
        q = f"SELECT {cls._columns} FROM portal WHERE kt_receiver=$1"
        rows = await cls.db.fetch(q, kt_receiver)
        return [cls._from_row(row) for row in rows if row]

    @classmethod
    async def all(cls) -> List[Portal]:
        q = f"SELECT {cls._columns} FROM portal"
        rows = await cls.db.fetch(q)
        return [cls._from_row(row) for row in rows if row]

    @property
    def _values(self):
        return (
            self.ktid,
            self.kt_receiver,
            self.kt_type,
            self.mxid,
            self.name,
            self.description,
            self.photo_id,
            self.avatar_url,
            self.encrypted,
            self.name_set,
            self.avatar_set,
            self.fully_read_kt_chat,
            self.relay_user_id,
        )

    _args = "$" + ", $".join(str(i + 1) for i in range(_columns.count(',') + 1))
    async def insert(self) -> None:
        q = f"INSERT INTO portal ({self._columns}) VALUES ({self._args})"
        await self.db.execute(q, *self._values)

    async def delete(self) -> None:
        q = "DELETE FROM portal WHERE ktid=$1 AND kt_receiver=$2"
        await self.db.execute(q, self.ktid, self.kt_receiver)

    _nonkey_column_asgns = ", ".join(
        map(lambda t: (i:=t[0], word:=t[1], f"{word}=${i + 3}")[-1],
            enumerate(_columns.split(", ")[2:])
        )
    )
    async def save(self) -> None:
        q = f"UPDATE portal SET {self._nonkey_column_asgns} WHERE ktid=$1 AND kt_receiver=$2"
        await self.db.execute(q, *self._values)