from db_logging import log_change


def set_name(cursor, name):
    cursor.execute("DELETE FROM metadata")
    cursor.execute(
        "INSERT INTO metadata (name) VALUES (%s)",
        (name,)
    )
    log_change(cursor, f"Updated metadata name to {name}")


def get_name(cursor):
    cursor.execute("SELECT name FROM metadata LIMIT 1")
    row = cursor.fetchone()
    return row["name"] if row else None


def set_comment(cursor, comment):
    cursor.execute("DELETE FROM metadata")
    cursor.execute(
        "INSERT INTO metadata (comment) VALUES (%s)",
        (comment,)
    )
    log_change(cursor, f"Updated metadata comment to {comment}")


def get_comment(cursor):
    cursor.execute("SELECT comment FROM metadata LIMIT 1")
    row = cursor.fetchone()
    return row["comment"] if row else None


def set_keys(cursor, public_key, private_key):
    cursor.execute("DELETE FROM metadata")
    cursor.execute(
        """
        INSERT INTO metadata (public_key, private_key)
        VALUES (%s, %s)
        """,
        (public_key, private_key)
    )
    log_change(cursor, "Updated metadata keys")


def get_public_key(cursor):
    cursor.execute("SELECT public_key FROM metadata LIMIT 1")
    row = cursor.fetchone()
    return row["public_key"] if row else None


def get_private_key(cursor):
    cursor.execute("SELECT private_key FROM metadata LIMIT 1")
    row = cursor.fetchone()
    return row["private_key"] if row else None


def set_defense_p(cursor, defense_p: bool):
    """Set the metadata defense_p flag.

    This table is treated as a singleton row at the application level.
    Current convention in this codebase is to wipe and re-insert.
    """
    cursor.execute("DELETE FROM metadata")
    cursor.execute(
        "INSERT INTO metadata (defense_p) VALUES (%s)",
        (defense_p,)
    )
    log_change(cursor, f"Updated metadata defense_p to {defense_p}")


def get_defense_p(cursor) -> bool:
    cursor.execute("SELECT defense_p FROM metadata LIMIT 1")
    row = cursor.fetchone()
    if not row or row["defense_p"] is None:
        return False
    return bool(row["defense_p"])