from uuid import uuid4

import pytest
from fastapi import HTTPException
from fastapi.testclient import TestClient


def test_validate_json_allows_valid_payload(api_client: TestClient) -> None:
    payload = {
        "name": f"ValidJSON-{uuid4()}",
        "description": "Middleware should allow valid JSON.",
    }
    response = api_client.post("/api/scenarios/", json=payload)
    assert response.status_code == 200
    data = response.json()
    assert data["name"] == payload["name"]


def test_validate_json_rejects_invalid_payload(api_client: TestClient) -> None:
    with pytest.raises(HTTPException) as exc_info:
        api_client.post(
            "/api/scenarios/",
            content=b"{not valid json",
            headers={"Content-Type": "application/json"},
        )

    assert exc_info.value.status_code == 400
    assert exc_info.value.detail == "Invalid JSON payload"