"""Tests des endpoints : succès, vide, erreur amont, timeout, cache périmé,
rate-limit du refresh, santé."""

import time

import pytest
from fastapi.testclient import TestClient

import app as app_module
import sources

FIRE_OK = {
    "id": "abc123", "lat": 43.3, "lon": 5.4,
    "acquired_at": "2026-07-27T01:37:00Z",
    "source": "NASA FIRMS VIIRS S-NPP (Europe 24 h)", "satellite": "N",
    "instrument": "VIIRS", "frp": 12.3, "brightness": 312.5,
    "confidence": "nominal", "daynight": "N", "type": "thermal_anomaly",
}


def _result(fires, used=None):
    sts = [sources.SourceStatus(name=u or "src", ok=True, latency_ms=42,
                                last_success="2026-07-27T10:00:00Z")
           for u in (used or ["src"])]
    return sources.FetchResult(fires=fires, sources_used=used or ["src"], statuses=sts)


@pytest.fixture()
def client(monkeypatch):
    monkeypatch.setattr(app_module, "_cache", {"payload": None, "fetched_at": 0.0})
    monkeypatch.setattr(app_module, "_last_forced", 0.0)
    monkeypatch.setattr(app_module, "_last_statuses", [])
    return TestClient(app_module.app)


def test_fires_succes(client, monkeypatch):
    monkeypatch.setattr(sources, "fetch_all", lambda: _result([FIRE_OK]))
    r = client.get("/api/fires")
    assert r.status_code == 200
    body = r.json()
    assert body["status"] == "ok"
    assert body["count"] == 1
    assert body["fires"][0]["id"] == "abc123"
    assert body["data_observed_at"] == "2026-07-27T01:37:00Z"
    assert body["stale"] is False
    assert body["errors"] == []
    assert body["attribution"]


def test_fires_vide_honnete(client, monkeypatch):
    """Amont OK mais zéro feu : état vide honnête, pas de données fabriquées."""
    monkeypatch.setattr(sources, "fetch_all", lambda: _result([]))
    body = client.get("/api/fires").json()
    assert body["status"] == "ok"
    assert body["count"] == 0
    assert body["fires"] == []
    assert body["data_observed_at"] is None


def test_erreur_amont_sans_cache(client, monkeypatch):
    def boom():
        raise sources.UpstreamError("toutes les sources ont échoué")
    monkeypatch.setattr(sources, "fetch_all", boom)
    body = client.get("/api/fires").json()
    assert body["status"] == "error"
    assert body["fires"] == []
    assert body["errors"]


def test_cache_frais_pas_de_nouvel_appel(client, monkeypatch):
    appels = []
    def fake():
        appels.append(1)
        return _result([FIRE_OK])
    monkeypatch.setattr(sources, "fetch_all", fake)
    client.get("/api/fires")
    client.get("/api/fires")
    assert len(appels) == 1  # 2e appel servi par le cache


def test_cache_perime_apres_echec(client, monkeypatch):
    monkeypatch.setattr(sources, "fetch_all", lambda: _result([FIRE_OK]))
    first = client.get("/api/fires").json()
    assert first["stale"] is False
    # Cache expiré + amont en panne -> repli sur cache marqué périmé
    app_module._cache["fetched_at"] = time.time() - (app_module.TTL_S + 10)
    def boom():
        raise sources.UpstreamError("timeout amont")
    monkeypatch.setattr(sources, "fetch_all", boom)
    body = client.get("/api/fires").json()
    assert body["status"] == "ok"
    assert body["stale"] is True
    assert body["count"] == 1
    assert body["errors"]


def test_timeout_traite_comme_erreur(client, monkeypatch):
    def boom():
        raise sources.UpstreamError("ReadTimeout: délai dépassé")
    monkeypatch.setattr(sources, "fetch_all", boom)
    body = client.get("/api/fires").json()
    assert body["status"] == "error"


def test_refresh_force_et_rate_limit(client, monkeypatch):
    appels = []
    def fake():
        appels.append(1)
        return _result([FIRE_OK])
    monkeypatch.setattr(sources, "fetch_all", fake)
    client.get("/api/fires")
    app_module._cache["fetched_at"] = time.time() - (app_module.TTL_S + 10)
    r = client.post("/api/refresh")
    assert r.status_code == 200
    assert len(appels) == 2
    # Second refresh dans les 30 s : pas de nouvel appel amont
    app_module._cache["fetched_at"] = time.time() - (app_module.TTL_S + 10)
    client.post("/api/refresh")
    assert len(appels) == 2


def test_health_apres_succes(client, monkeypatch):
    monkeypatch.setattr(sources, "fetch_all", lambda: _result([FIRE_OK], ["NASA FIRMS test"]))
    client.get("/api/fires")
    r = client.get("/api/health")
    assert r.status_code == 200
    body = r.json()
    assert body["status"] in ("ok", "degraded")
    assert body["version"]
    assert body["time"].endswith("Z")
    assert body["sources"][0]["name"] == "NASA FIRMS test"
    assert body["sources"][0]["ok"] is True
    assert body["cache"]["ttl_s"] == app_module.TTL_S
    assert body["cache"]["age_s"] is not None


def test_health_sans_donnees(client):
    body = client.get("/api/health").json()
    assert body["status"] == "degraded"
    assert body["cache"]["age_s"] is None