from typing import Any

from psycopg import AsyncConnection


def _optional_text(value: Any) -> str | None:
    return str(value).strip() if value is not None else None


def _optional_float(value: Any) -> float | None:
    return float(value) if value is not None else None


def _optional_int(value: Any) -> int | None:
    return int(value) if value is not None else None


class ScadaInfoRepository:
    """Read SCADA metadata from the current project's business database."""

    @staticmethod
    async def get_scadas(conn: AsyncConnection) -> list[dict[str, Any]]:
        async with conn.cursor() as cur:
            await cur.execute(
                """
                SELECT id AS device_id,
                       device_type,
                       node_id,
                       link_id,
                       api_query_id,
                       transmission_mode,
                       transmission_frequency,
                       reliability,
                       x,
                       y
                FROM gis.scada_devices
                ORDER BY id
                """
            )
            records = await cur.fetchall()

        return [
            {
                "device_id": str(record["device_id"]).strip(),
                "device_type": str(record["device_type"]).strip().lower(),
                "node_id": _optional_text(record["node_id"]),
                "link_id": _optional_text(record["link_id"]),
                "api_query_id": _optional_text(record["api_query_id"]),
                "transmission_mode": record["transmission_mode"],
                "transmission_frequency": record["transmission_frequency"],
                "reliability": _optional_int(record["reliability"]),
                "x": _optional_float(record["x"]),
                "y": _optional_float(record["y"]),
            }
            for record in records
        ]