from __future__ import annotations

from pathlib import Path

from fastapi.testclient import TestClient

from src.ephemeris_mcp.server import (
    _parse_datetime,
    create_app,
    get_constellation_at_ecliptic,
    get_moon_phase,
    get_lunar_state,
    get_planetary_positions,
    get_sidereal_time,
    get_solar_events,
    list_available_bodies,
)
from src.ephemeris_mcp.storage import EphemerisCache, cache_key


def test_parse_datetime_accepts_iso_zulu() -> None:
    jd = _parse_datetime("2026-05-10T12:00:00Z")
    assert isinstance(jd, float)
    assert 2461170 < jd < 2461172


def test_cache_roundtrip(tmp_path: Path) -> None:
    cache = EphemerisCache(tmp_path / "cache.sqlite3")
    key = cache_key("demo", lon=8.5, lat=47.3)
    assert cache.get(key) is None
    cache.set(key, {"ok": True, "value": 42}, ttl=60)
    assert cache.get(key) == {"ok": True, "value": 42}


def test_health_endpoint_smoke() -> None:
    client = TestClient(create_app())
    res = client.get("/health")
    assert res.status_code == 200
    data = res.json()
    assert data == {"ok": True, "server": "ephemeris-mcp", "port": 7015}


def test_root_lists_core_tools() -> None:
    client = TestClient(create_app())
    res = client.get("/")
    assert res.status_code == 200
    data = res.json()
    assert data["server"] == "ephemeris-mcp"
    assert data["status"] == "ready"
    assert data["tools"] == [
        "get_planetary_positions",
        "get_solar_events",
        "get_lunar_state",
        "get_moon_phase",
        "get_sidereal_time",
        "get_constellation_at_ecliptic",
        "list_available_bodies",
    ]
    assert data["mcp"] == {"sse": "/mcp/sse", "messages": "/mcp/messages"}


def test_list_available_bodies_shape() -> None:
    result = list_available_bodies()
    assert "bodies" in result
    names = {body["name"] for body in result["bodies"]}
    assert "sun" in names
    assert "moon" in names
    assert "mars" in names


def test_tool_shapes_are_present() -> None:
    body_positions = get_planetary_positions(datetime="2026-05-10T12:00:00Z")
    solar_events = get_solar_events(date="2026-05-10", lat=47.0, lon=8.0)
    lunar_state = get_lunar_state(datetime="2026-05-10T12:00:00Z")
    sidereal_time = get_sidereal_time(datetime="2026-05-10T12:00:00Z")
    constellation = get_constellation_at_ecliptic(120.0)

    assert body_positions["input"]["datetime"] == "2026-05-10T12:00:00Z"
    assert "bodies" in body_positions
    assert solar_events["input"]["date"] == "2026-05-10"
    assert "events_jd" in solar_events
    assert "lunar_state" in lunar_state
    assert "greenwich_sidereal_time" in sidereal_time
    assert constellation["input"]["ecliptic_lon"] == 120.0


def test_moon_phase_tool_shape() -> None:
    moon_phase = get_moon_phase(datetime="2026-05-10T12:00:00Z")
    assert moon_phase["phase_name"]
    assert 0.0 <= moon_phase["illumination_fraction"] <= 1.0
    assert moon_phase["input"]["datetime"] == "2026-05-10T12:00:00Z"
    assert moon_phase["phase_name"] == "Last Quarter"
    assert moon_phase["next_major_phase"]["phase_name"] in {"New Moon", "First Quarter", "Full Moon", "Last Quarter"}
    assert "at_utc" in moon_phase["next_major_phase"]
    assert moon_phase["next_major_phase"]["in_text"]
    assert "d" in moon_phase["next_major_phase"]["in_text"] or "h" in moon_phase["next_major_phase"]["in_text"] or "m" in moon_phase["next_major_phase"]["in_text"]


def test_default_location_can_be_configured(monkeypatch) -> None:
    monkeypatch.setenv("EPHEMERIS_DEFAULT_LAT", "48.2")
    monkeypatch.setenv("EPHEMERIS_DEFAULT_LON", "16.37")

    from importlib import reload
    import src.ephemeris_mcp.config as config
    import src.ephemeris_mcp.server as server
    reload(config)
    server = reload(server)

    result = server.get_moon_phase(datetime="2026-05-10T12:00:00Z")
    assert result["input"]["lat"] == 48.2
    assert result["input"]["lon"] == 16.37