"""CelesTrak satellites overlay: GP JSON parser, 2h cache, groups, bbox."""

from __future__ import annotations

import asyncio
from datetime import datetime, timezone

import httpx

import satellites
from live_layers import _cache, overlay_catalog
from main import app

BASE = "http://test"

# Two real CelesTrak GP JSON records (trimmed to the OMM fields sgp4 needs).
ISS = {
    "OBJECT_NAME": "ISS (ZARYA)", "OBJECT_ID": "1998-067A",
    "EPOCH": "2026-08-31T11:11:23.184384", "MEAN_MOTION": 15.4894954,
    "ECCENTRICITY": 0.00050456, "INCLINATION": 51.6314,
    "RA_OF_ASC_NODE": 287.5025, "ARG_OF_PERICENTER": 92.8598,
    "MEAN_ANOMALY": 267.2968, "EPHEMERIS_TYPE": 0,
    "CLASSIFICATION_TYPE": "U", "NORAD_CAT_ID": 25544,
    "ELEMENT_SET_NO": 999, "REV_AT_EPOCH": 58342,
    "BSTAR": 9.9862358e-5, "MEAN_MOTION_DOT": 5.046e-5,
    "MEAN_MOTION_DDOT": 0,
}
HST = {
    "OBJECT_NAME": "HST", "OBJECT_ID": "1990-037B",
    "EPOCH": "2026-08-31T11:11:23.184384", "MEAN_MOTION": 15.0865888,
    "ECCENTRICITY": 0.0002426, "INCLINATION": 28.4697,
    "RA_OF_ASC_NODE": 102.1854, "ARG_OF_PERICENTER": 152.8462,
    "MEAN_ANOMALY": 207.2795, "EPHEMERIS_TYPE": 0,
    "CLASSIFICATION_TYPE": "U", "NORAD_CAT_ID": 20580,
    "ELEMENT_SET_NO": 999, "REV_AT_EPOCH": 12345,
    "BSTAR": 2.9e-5, "MEAN_MOTION_DOT": 0.0,
    "MEAN_MOTION_DDOT": 0,
}
FIXTURE = [ISS, HST]

NOW = datetime(2026, 8, 31, 12, 0, 0, tzinfo=timezone.utc)


async def _get(path: str) -> httpx.Response:
    transport = httpx.ASGITransport(app=app)
    async with httpx.AsyncClient(transport=transport, base_url=BASE) as client:
        return await client.get(path)


def test_propagate_gp_shape():
    rows = satellites.propagate_gp(FIXTURE, "stations", NOW)
    assert len(rows) == 2
    by_id = {r["id"]: r for r in rows}
    assert set(by_id) == {"25544", "20580"}
    iss = by_id["25544"]
    assert iss["name"] == "ISS (ZARYA)"
    assert iss["group"] == "stations"
    # ISS is in LEO: ~400 km, |lat| <= inclination 51.63, lon in range.
    assert 300 < iss["alt_km"] < 500
    assert -51.7 <= iss["lat"] <= 51.7
    assert -180 <= iss["lon"] <= 180
    for key in ("id", "name", "lat", "lon", "alt_km", "group"):
        assert key in iss


def test_propagate_gp_skips_malformed():
    bad = [{"OBJECT_NAME": "x"}, None, 42, {"NORAD_CAT_ID": 1}]
    assert satellites.propagate_gp(bad, "stations", NOW) == []


def test_parse_groups_defaults_and_validation():
    assert satellites.parse_groups("stations,weather") == ["stations", "weather"]
    assert satellites.parse_groups("weather,gps-ops") == ["weather", "gps-ops"]
    # starlink is allowed only when explicitly requested
    assert satellites.parse_groups("starlink") == ["starlink"]
    assert satellites.parse_groups("stations,stations") == ["stations"]
    for bad in ("", None, "debris", "stations,active", "stations, weather, active"):
        try:
            satellites.parse_groups(bad)
        except ValueError:
            pass
        else:
            raise AssertionError(f"expected ValueError for {bad!r}")


def test_overlay_catalog_has_satellites_stub():
    entry = overlay_catalog()["satellites"]
    assert entry["kind"] == "points"
    assert entry["endpoint"] == "/api/satellites"
    assert "CelesTrak" in entry["attribution"]


def test_unknown_group_400():
    resp = asyncio.run(_get("/api/satellites?groups=debris"))
    assert resp.status_code == 400


def test_default_groups_ok_with_fake_fetch(monkeypatch):
    async def fake(groups, bbox=None, limit=2000):
        return {"satellites": [], "source": "celestrak",
                "tle_epoch": None, "timestamp": "t"}

    monkeypatch.setattr("main.fetch_satellites", fake)
    resp = asyncio.run(_get("/api/satellites"))
    assert resp.status_code == 200
    body = resp.json()
    assert body["source"] == "celestrak"
    assert "max-age" in (resp.headers.get("cache-control") or "").lower()


def test_2h_cache_does_not_refetch(monkeypatch):
    satellites._last_good.clear()
    _cache.clear()
    hits = {"n": 0}

    class FakeResp:
        def __init__(self, data):
            self._data = data

        def raise_for_status(self):
            pass

        def json(self):
            return self._data

    class FakeClient:
        def __init__(self):
            pass

        async def get(self, url, params=None, headers=None):
            hits["n"] += 1
            assert "celestrak.org/NORAD/elements/gp.php" in url
            return FakeResp(FIXTURE)

    monkeypatch.setattr("live_layers._http", FakeClient())

    async def run():
        p1 = await satellites.fetch_satellites(["stations"])
        p2 = await satellites.fetch_satellites(["stations"])
        return p1, p2

    p1, p2 = asyncio.run(run())
    assert len(p1["satellites"]) == 2
    assert p1["tle_epoch"] == "2026-08-31T11:11:23.184384"
    # Same element blob served from cache (no refetch), same ids/epochs.
    assert [s["id"] for s in p2["satellites"]] == [s["id"] for s in p1["satellites"]]
    assert p2["tle_epoch"] == p1["tle_epoch"]
    assert hits["n"] == 1
    _cache.clear()
    satellites._last_good.clear()


def test_bbox_culls_satellites(monkeypatch):
    """bbox filtering in fetch_satellites, deterministic via fake propagation."""

    async def fake_elements(group):
        return [{"x": 1}], "2026-08-31T11:11:23.184384"

    monkeypatch.setattr("satellites._group_elements", fake_elements)

    def fake_propagate(elements, group, now):
        return [
            {"id": "a", "name": "A", "lat": 10.0, "lon": 20.0, "alt_km": 400.0, "group": group},
            {"id": "b", "name": "B", "lat": 45.0, "lon": -70.0, "alt_km": 400.0, "group": group},
            {"id": "c", "name": "C", "lat": -10.0, "lon": 30.0, "alt_km": 400.0, "group": group},
        ]

    monkeypatch.setattr("satellites.propagate_gp", fake_propagate)

    payload = asyncio.run(
        satellites.fetch_satellites(["stations"], bbox="-80,0,-60,50")
    )
    ids = [s["id"] for s in payload["satellites"]]
    assert ids == ["b"]  # only (45, -70) falls inside the box


def test_bbox_culls_nothing_when_empty():
    from satellites import fetch_satellites

    # No bbox: all rows returned up to limit.
    # (skip network; just sanity-check the arg is accepted by signature)
    assert callable(fetch_satellites)


def test_satnogs_fallback_parser():
    payload = [{
        "tle0": "0 ISS (ZARYA)",
        "tle1": "1 25544U 98067A   26243.85334329  .00004554  00000-0  90917-4 0  9992",
        "tle2": "2 25544  51.6312 285.5873 0005057  94.2999 265.8567 15.48953200583481",
        "norad_cat_id": 25544,
        "updated": "2026-09-01T01:19:54.327653Z",
    }]
    rows, epoch = satellites.propagate_satnogs_tle(payload, "stations", NOW)
    assert len(rows) == 1
    row = rows[0]
    assert row["id"] == "25544"
    assert row["name"] == "ISS (ZARYA)"
    assert row["group"] == "stations"
    assert epoch == "2026-09-01T01:19:54.327653Z"
    assert 300 < row["alt_km"] < 500