Airport Traffic

"""Typed models for Historical ADS-B - matches historical-adsb.mdx field tables."""from __future__ import annotationsfrom dataclasses import dataclassfrom typing import Literal@dataclassclass HistoricalFlightSummary:    flight_id: str    icao24: str | None    callsign: str | None    flight_number: str | None    tail_number: str | None    departure_airport_icao: str | None    arrival_airport_icao: str | None    flight_start: str    flight_end: str    takeoff_time: str | None    landing_time: str | None    flight_duration_min: float | None    distance_nm: float | None@dataclassclass HistoricalPosition:    timestamp: str    icao24: str    latitude: float    longitude: float    altitude_baro: float | None    ground_speed: float | None    track: float | None    vertical_rate: float | None    is_on_ground: bool@dataclassclass HistoricalFlightWindow:    flight_id: str    callsign: str | None    departure_airport_icao: str | None    arrival_airport_icao: str | None    takeoff_time: str | None    landing_time: str | None    flight_start: str    flight_end: str    flight_state: str | None@dataclassclass AirportTrafficFlight:    flight_id: str    icao24: str | None    callsign: str | None    departure_airport_icao: str | None    arrival_airport_icao: str | None    takeoff_time: str | None    landing_time: str | None    flight_duration_min: float | None    distance_nm: float | None@dataclassclass AirportTrafficResponse:    icao: str    direction: Literal["dep", "arr", "both"]    count: int    flights: list[AirportTrafficFlight]

import osfrom datetime import datetime, timedelta, timezoneimport requestsBASE = "https://data.skylinkapi.com/v3.1"HEADERS = {    "x-api-key": os.getenv("SKYLINK_API_KEY") or os.getenv("SKYLINK_API_KEY", "YOUR_API_KEY")}def fetch_airport_traffic(icao: str, *, direction: str = "both", tier: str = "ultra", hours: int = 24) -> dict:    now = datetime.now(timezone.utc)    start = (now - timedelta(hours=hours)).strftime("%Y-%m-%dT%H:%M:%SZ")    end = now.strftime("%Y-%m-%dT%H:%M:%SZ")    r = requests.get(        f"{BASE}/{tier}/history/airport/{icao.upper()}/traffic",        headers=HEADERS,        params={"start": start, "end": end, "direction": direction, "limit": 50},        timeout=(10, 30),    )    r.raise_for_status()    return r.json()if __name__ == "__main__":    import json    data = fetch_airport_traffic("EGLL")    print(json.dumps({"icao": data.get("icao"), "count": data.get("count")}, indent=2))