import sqlalchemy as sa

from common.db import Session


async def is_match(holder_name: str) -> dict | None:
    """Case-insensitive exact match against sanctions_entries.normalized_name."""
    async with Session() as session:
        result = await session.execute(
            sa.text(
                "SELECT country, list_source FROM sanctions_entries "
                "WHERE lower(normalized_name) = lower(:name) LIMIT 1"
            ),
            {"name": holder_name},
        )
        row = result.first()
    if row is None:
        return None
    return {"country": row.country, "list_source": row.list_source}