"""Партия: общий черновик формы завершения (совместное заполнение результатов).

Идемпотентна: на свежей БД таблицу создаёт 0001 (create_all из актуальных моделей) -> no-op;
на существующей БД создаёт таблицу.

Revision ID: 0012_match_finish_draft
Revises: 0011_user_history_prefs
Create Date: 2026-09-09
"""
from typing import Sequence, Union

import sqlalchemy as sa
from sqlalchemy import inspect

from alembic import op

revision: str = "0012_match_finish_draft"
down_revision: Union[str, None] = "0011_user_history_prefs"
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)
    if "match_finish_drafts" in insp.get_table_names():
        return
    op.create_table(
        "match_finish_drafts",
        sa.Column(
            "match_id",
            sa.Integer(),
            sa.ForeignKey("matches.id", ondelete="CASCADE"),
            primary_key=True,
        ),
        sa.Column("data", sa.JSON(), nullable=False),
        sa.Column(
            "updated_by",
            sa.Integer(),
            sa.ForeignKey("users.id", ondelete="SET NULL"),
            nullable=True,
        ),
        sa.Column("updated_at", sa.DateTime(), nullable=False),
    )


def downgrade() -> None:
    bind = op.get_bind()
    insp = inspect(bind)
    if "match_finish_drafts" in insp.get_table_names():
        op.drop_table("match_finish_drafts")