from fastapi.testclient import TestClient

from app.main import app

client = TestClient(app)


def test_healthcheck() -> None:
    response = client.get("/health")
    assert response.status_code == 200
    assert response.json() == {"status": "ok"}


def test_openapi_contains_expected_paths() -> None:
    response = client.get("/openapi.json")
    assert response.status_code == 200
    paths = response.json()["paths"]
    assert "/api/v1/terrain/profile" in paths
    assert "/api/v1/terrain/los" in paths
    assert "/api/v1/link/budget" in paths
    assert "/api/v1/coverage" in paths


def test_profile_endpoint_returns_geodesic_samples() -> None:
    response = client.post(
        "/api/v1/terrain/profile",
        json={
            "start": {"lat": 60.17, "lon": 24.94},
            "end": {"lat": 60.25, "lon": 25.10},
            "samples": 4,
            "include_buildings": True,
            "include_canopy": True,
            "k_factor": 1.333,
        },
    )
    assert response.status_code == 200
    data = response.json()
    assert data["distance_m"] > 0
    assert len(data["samples"]) == 4
    assert data["path_geojson"]["type"] == "LineString"


def test_elevation_returns_not_implemented_without_dem() -> None:
    response = client.get("/api/v1/terrain/elevation", params={"lat": 60.17, "lon": 24.94})
    assert response.status_code == 501


def test_los_endpoint_returns_obstruction_summary_fields() -> None:
    response = client.post(
        "/api/v1/terrain/los",
        json={
            "tx": {"lat": 59.935, "lon": 30.305, "height_agl": 30},
            "rx": {"lat": 59.945, "lon": 30.325, "height_agl": 2},
            "frequency_mhz": 433,
            "fresnel_clearance": 0.6,
            "include_buildings": False,
            "include_canopy": False,
            "k_factor": 1.333,
            "samples": 16,
        },
    )
    assert response.status_code == 200
    data = response.json()
    assert "obstructions" in data
    assert "geometric_obstructions" in data
    assert data["fresnel_violations_count"] == len(data["obstructions"])
    assert data["geometric_obstructions_count"] == len(data["geometric_obstructions"])
    assert data["building_obstructions_count"] == len(
        [item for item in data["geometric_obstructions"] if item["type"] == "building"]
    )


def test_manual_link_budget_endpoint() -> None:
    response = client.post(
        "/api/v1/link/budget",
        json={
            "tx": {"lat": 60.17, "lon": 24.94, "height_agl": 30, "power_dbm": 37, "gain_dbi": 8},
            "rx": {
                "lat": 60.25,
                "lon": 25.10,
                "height_agl": 2,
                "gain_dbi": 2,
                "sensitivity_dbm": -110,
            },
            "frequency_mhz": 433,
            "model": "manual",
            "include_buildings": True,
            "include_vegetation": True,
            "k_factor": 1.333,
        },
    )
    assert response.status_code == 200
    data = response.json()
    assert data["fspl_db"] > 0
    assert data["link_viable"] is True