# 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 mautrix.util.async_db import Connection, Scheme

from . import upgrade_table


@upgrade_table.register(description="Fix message table and add tracking to assist with backfilling read receipts")
async def upgrade_v4(conn: Connection, scheme: Scheme) -> None:
    if scheme != Scheme.SQLITE:
        await conn.execute("ALTER TABLE message RENAME COLUMN kt_chat TO kt_channel")
        await conn.execute("ALTER TABLE message DROP CONSTRAINT message_pkey")
        await conn.execute('ALTER TABLE message ADD PRIMARY KEY (ktid, kt_channel, kt_receiver, "index")')
    else:
        await conn.execute(
            """CREATE TABLE message_v4 (
                mxid        TEXT NOT NULL,
                mx_room     TEXT NOT NULL,
                ktid        BIGINT,
                kt_receiver BIGINT NOT NULL,
                "index"     SMALLINT NOT NULL,
                kt_channel  BIGINT NOT NULL,
                timestamp   BIGINT NOT NULL,
                PRIMARY KEY (ktid, kt_channel, kt_receiver, "index"),
                FOREIGN KEY (kt_channel, kt_receiver) REFERENCES portal(ktid, kt_receiver)
                    ON UPDATE CASCADE ON DELETE CASCADE,
                UNIQUE (mxid, mx_room)
            )"""
        )
        await conn.execute(
            """
            INSERT INTO message_v4 (mxid, mx_room, ktid, kt_receiver, "index", kt_channel, timestamp)
            SELECT mxid, mx_room, ktid, kt_receiver, "index", kt_chat, timestamp FROM message
            """
        )
        await conn.execute("DROP TABLE message")
        await conn.execute("ALTER TABLE message_v4 RENAME TO message")

    await conn.execute("ALTER TABLE portal ADD COLUMN fully_read_kt_chat BIGINT")