# maubot - A plugin-based Matrix bot system.
# Copyright (C) 2022 Tulir Asokan
#
# 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

from asyncpg import Record
from attr import dataclass

from mautrix.client import SyncStore
from mautrix.types import ContentURI, DeviceID, FilterID, SyncToken, UserID
from mautrix.util.async_db import Database

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


@dataclass
class Client(SyncStore):
    db: ClassVar[Database] = fake_db

    id: UserID
    homeserver: str
    access_token: str
    device_id: DeviceID
    enabled: bool

    next_batch: SyncToken
    filter_id: FilterID

    sync: bool
    autojoin: bool
    online: bool

    displayname: str
    avatar_url: ContentURI

    @classmethod
    def _from_row(cls, row: Record | None) -> Client | None:
        if row is None:
            return None
        return cls(**row)

    _columns = (
        "id, homeserver, access_token, device_id, enabled, next_batch, filter_id, "
        "sync, autojoin, online, displayname, avatar_url"
    )

    @property
    def _values(self):
        return (
            self.id,
            self.homeserver,
            self.access_token,
            self.device_id,
            self.enabled,
            self.next_batch,
            self.filter_id,
            self.sync,
            self.autojoin,
            self.online,
            self.displayname,
            self.avatar_url,
        )

    @classmethod
    async def all(cls) -> list[Client]:
        rows = await cls.db.fetch(f"SELECT {cls._columns} FROM client")
        return [cls._from_row(row) for row in rows]

    @classmethod
    async def get(cls, id: str) -> Client | None:
        q = f"SELECT {cls._columns} FROM client WHERE id=$1"
        return cls._from_row(await cls.db.fetchrow(q, id))

    async def insert(self) -> None:
        q = """
        INSERT INTO client (
            id, homeserver, access_token, device_id, enabled, next_batch, filter_id,
            sync, autojoin, online, displayname, avatar_url
        ) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12)
        """
        await self.db.execute(q, *self._values)

    async def put_next_batch(self, next_batch: SyncToken) -> None:
        await self.db.execute("UPDATE client SET next_batch=$1 WHERE id=$2", next_batch, self.id)
        self.next_batch = next_batch

    async def get_next_batch(self) -> SyncToken:
        return self.next_batch

    async def update(self) -> None:
        q = """
        UPDATE client SET homeserver=$2, access_token=$3, device_id=$4, enabled=$5,
                          next_batch=$6, filter_id=$7, sync=$8, autojoin=$9, online=$10,
                          displayname=$11, avatar_url=$12
        WHERE id=$1
        """
        await self.db.execute(q, *self._values)

    async def delete(self) -> None:
        await self.db.execute("DELETE FROM client WHERE id=$1", self.id)