from sqlmodel import Session, SQLModel, create_engine

from app.models import TerminalDeviceState, TerminalMessageRaw
from app.mqtt.parser_worker import process_pending_batch
from app.mqtt.repository import insert_raw_message


def _session() -> Session:
    engine = create_engine("sqlite://")
    SQLModel.metadata.create_all(engine)
    return Session(engine)


def test_insert_raw_message_sets_unparsed_defaults() -> None:
    with _session() as session:
        row = insert_raw_message(
            session=session,
            device_id="device-001",
            topic="terminal/device-001/raw",
            payload=b"$GPRMC,123520,A,3723.2475,N,12158.3416,W,0.13,309.62,120598,,,A*74\r\n",
            qos=1,
            retain=False,
        )

        assert row.parsed_at is None
        assert row.parse_error is None
        assert row.payload_size > 0
        assert len(row.payload_sha256) == 64


def test_worker_marks_success_and_updates_state() -> None:
    with _session() as session:
        raw = insert_raw_message(
            session=session,
            device_id="device-001",
            topic="terminal/device-001/raw",
            payload=b"$GPGGA,123519,3723.2475,N,12158.3416,W,1,12,0.8,10.0,M,-25.0,M,,*65\r\n",
            qos=1,
            retain=False,
        )

        processed = process_pending_batch(session=session, batch_size=10)

        assert processed == 1

        refreshed = session.get(TerminalMessageRaw, raw.id)
        assert refreshed is not None
        assert refreshed.parsed_at is not None
        assert refreshed.parse_error is None

        state = session.get(TerminalDeviceState, "device-001")
        assert state is not None
        assert state.lat is not None
        assert state.lon is not None


def test_worker_marks_failed_without_retry_schedule(monkeypatch) -> None:
    def _raise_parse_error(_payload: bytes) -> list[dict[str, object]]:
        raise ValueError("boom")

    monkeypatch.setattr(
        "app.mqtt.parser_worker.parse_mixed_payload", _raise_parse_error
    )

    with _session() as session:
        raw = insert_raw_message(
            session=session,
            device_id="device-err",
            topic="terminal/device-err/raw",
            payload=b"$GPGGA,broken*00\r\n",
            qos=1,
            retain=False,
        )

        processed = process_pending_batch(session=session, batch_size=10)

        assert processed == 1
        refreshed = session.get(TerminalMessageRaw, raw.id)
        assert refreshed is not None
        assert refreshed.parsed_at is not None
        assert refreshed.parse_error == "boom"
        processed_again = process_pending_batch(session=session, batch_size=10)
        assert processed_again == 0


def test_schema_excludes_terminal_observation_event_table() -> None:
    assert "terminal_observation_event" not in SQLModel.metadata.tables


def test_ingest_and_parse_real_nmea_sample() -> None:
    from pathlib import Path

    sample_path = Path(__file__).parent / "nmea.txt"
    payload = sample_path.read_bytes()

    with _session() as session:
        raw = insert_raw_message(
            session=session,
            device_id="device-real-sample",
            topic="terminal/device-real-sample/raw",
            payload=payload,
            qos=1,
            retain=False,
        )

        processed = process_pending_batch(session=session, batch_size=10)
        assert processed == 1

        refreshed = session.get(TerminalMessageRaw, raw.id)
        assert refreshed is not None
        assert refreshed.parsed_at is not None
        assert refreshed.parse_error is None

        state = session.get(TerminalDeviceState, "device-real-sample")
        assert state is not None
        assert state.lat is not None
        assert state.lon is not None


def test_worker_builds_satellite_distribution_summary() -> None:
    payload = (
        b"$GNGGA,123519,3723.2475,N,12158.3416,W,4,12,0.8,10.0,M,-25.0,M,,*65\r\n"
        b"$GPGSA,A,3,02,05,12,,,,,,,,,,1.50,0.90,1.20*00\r\n"
        b"$GPGSV,1,1,04,02,17,213,40,05,29,121,37,12,66,314,44,25,14,048,39*71\r\n"
    )

    with _session() as session:
        insert_raw_message(
            session=session,
            device_id="device-gsv",
            topic="terminal/device-gsv/raw",
            payload=payload,
            qos=1,
            retain=False,
        )

        processed = process_pending_batch(session=session, batch_size=10)

        assert processed == 1
        state = session.get(TerminalDeviceState, "device-gsv")
        assert state is not None
        assert state.fix_status == "4"
        summary = state.satellite_signal_summary
        assert summary is not None
        assert summary["satellites_in_view"] == 4
        assert summary["snr_values"] == [40, 37, 44, 39]
        assert summary["used_satellite_ids"] == ["02", "05", "12"]
        assert summary["constellations"]["GPS"]["count"] == 4
        assert summary["constellations"]["GPS"]["used_in_navigation"] == 3