"""Участник партии: признак выбытия (eliminated).

Идемпотентна: на свежей БД столбец создаёт 0001 (create_all из актуальных моделей) → no-op;
на существующей БД добавляет столбец. render_as_batch включён в env.py (для SQLite).

Revision ID: 0009_participant_eliminated
Revises: 0008_notifications
Create Date: 2026-06-26
"""
from typing import Sequence, Union

import sqlalchemy as sa
from sqlalchemy import inspect

from alembic import op

revision: str = "0009_participant_eliminated"
down_revision: Union[str, None] = "0008_notifications"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    bind = op.get_bind()
    insp = inspect(bind)
    cols = {c["name"] for c in insp.get_columns("match_participants")}
    if "eliminated" not in cols:
        with op.batch_alter_table("match_participants") as b:
            b.add_column(
                sa.Column("eliminated", sa.Boolean(), nullable=False, server_default="0")
            )


def downgrade() -> None:
    bind = op.get_bind()
    insp = inspect(bind)
    cols = {c["name"] for c in insp.get_columns("match_participants")}
    if "eliminated" in cols:
        with op.batch_alter_table("match_participants") as b:
            b.drop_column("eliminated")