"""fts expression gin on messages and media

Revision ID: b7e3d9f1a4c6
Revises: a1d4f7c2e9b8
Create Date: 2026-05-29 22:30:00.000000

"""

from collections.abc import Sequence

from alembic import op

revision: str = "b7e3d9f1a4c6"
down_revision: str | None = "a1d4f7c2e9b8"
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    op.execute(
        "CREATE INDEX ix_messages_tsv ON messages USING gin "
        "(to_tsvector('russian', coalesce(text, '')))"
    )
    op.execute(
        "CREATE INDEX ix_media_tsv ON media USING gin "
        "(to_tsvector('russian', coalesce(extracted_text, '')))"
    )


def downgrade() -> None:
    op.execute("DROP INDEX IF EXISTS ix_media_tsv")
    op.execute("DROP INDEX IF EXISTS ix_messages_tsv")