from datetime import datetime, timezone

from sqlalchemy import insert
from sqlalchemy.orm import Session

from app.models.location import Location
from app.schemas.location import LocationRecordRequest


def _parse_optional_float_compat(value: str | None) -> float:
    try:
        return float(value)
    except (TypeError, ValueError):
        return 0.0


def _parse_required_float(value: str, field_name: str) -> float:
    try:
        return float(value)
    except (TypeError, ValueError) as exc:
        raise ValueError(f"Invalid numeric value for {field_name}") from exc


def _utc_now_rfc3339() -> str:
    now = datetime.now(timezone.utc).replace(microsecond=0)
    return now.isoformat().replace("+00:00", "Z")


def record_location(session: Session, payload: LocationRecordRequest) -> None:
    stmt = (
        insert(Location)
        .prefix_with("OR IGNORE")
        .values(
            person=payload.person,
            datetime=_utc_now_rfc3339(),
            latitude=_parse_required_float(payload.latitude, "latitude"),
            longitude=_parse_required_float(payload.longitude, "longitude"),
            altitude=_parse_optional_float_compat(payload.altitude),
        )
    )
    session.execute(stmt)
    session.commit()