from fastapi.testclient import TestClient

from core.api.main import app


client = TestClient(app)


def valid_payload() -> dict:
    return {
        "raw_id": "raw-test-001",
        "src_ip": "10.240.12.1",
        "device_id": "310410998877665",
        "caller_num": "0019875551234",
        "svc": "4G_DATA",
        "up_bytes": 1048576,
        "down_bytes": 4194304,
        "rat": 6,
        "lac": "4021",
        "ci": "8812",
        "epoch_start": 1789900000,
        "epoch_end": 1789900300,
    }


def test_health_endpoint() -> None:
    response = client.get("/health")

    assert response.status_code == 200
    assert response.json() == {
        "status": "ok",
    }


def test_valid_cdr_returns_202() -> None:
    payload = valid_payload()

    response = client.post(
        "/api/v1/cdr/raw",
        json=payload,
    )

    assert response.status_code == 202

    assert response.json() == {
        "status": "accepted",
        "raw_id": "raw-test-001",
    }


def test_missing_required_field_returns_400() -> None:
    payload = valid_payload()
    del payload["caller_num"]

    response = client.post(
        "/api/v1/cdr/raw",
        json=payload,
    )

    assert response.status_code == 400

    body = response.json()

    assert body["error"] == "missing_required_field"
    assert body["failed_field"] == "caller_num"


def test_invalid_rat_returns_400() -> None:
    payload = valid_payload()
    payload["rat"] = 99

    response = client.post(
        "/api/v1/cdr/raw",
        json=payload,
    )

    assert response.status_code == 400

    body = response.json()

    assert body["error"] == "invalid_rat_value"
    assert body["failed_field"] == "rat"


def test_invalid_epoch_returns_400() -> None:
    payload = valid_payload()

    payload["epoch_start"] = 200
    payload["epoch_end"] = 100

    response = client.post(
        "/api/v1/cdr/raw",
        json=payload,
    )

    assert response.status_code == 400

    body = response.json()

    assert body["error"] == "invalid_epoch"

def test_malformed_json_returns_400() -> None:
    response = client.post(
        "/api/v1/cdr/raw",
        content='{"raw_id": invalid}',
        headers={
            "Content-Type": "application/json",
        },
    )

    assert response.status_code == 400

    body = response.json()

    assert body["error"] == "invalid_json"

def test_non_object_json_returns_400() -> None:
    response = client.post(
        "/api/v1/cdr/raw",
        json=[
            "not",
            "a",
            "cdr",
        ],
    )

    assert response.status_code == 400

    body = response.json()

    assert body["error"] == "invalid_payload"