"""Медиа партии: таблица match_attachments (фото в общем комментарии).

Идемпотентна (как 0006): на свежей БД таблицу создаёт 0001 (create_all); на существующей —
create_table здесь.

Revision ID: 0007_match_attachments
Revises: 0006_group_invitations
Create Date: 2026-06-17
"""
from typing import Sequence, Union

import sqlalchemy as sa
from sqlalchemy import inspect

from alembic import op

revision: str = "0007_match_attachments"
down_revision: Union[str, None] = "0006_group_invitations"
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_attachments" in insp.get_table_names():
        return
    op.create_table(
        "match_attachments",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column(
            "match_id",
            sa.Integer(),
            sa.ForeignKey("matches.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column(
            "uploaded_by",
            sa.Integer(),
            sa.ForeignKey("users.id", ondelete="SET NULL"),
            nullable=True,
        ),
        sa.Column("kind", sa.String(16), nullable=False, server_default="photo"),
        sa.Column("storage_path", sa.String(255), nullable=False),
        sa.Column("mime_type", sa.String(64), nullable=False),
        sa.Column("size_bytes", sa.Integer(), nullable=False),
        sa.Column("created_at", sa.DateTime(), nullable=False),
    )
    op.create_index("ix_match_attachments_match_id", "match_attachments", ["match_id"])


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