from __future__ import annotations

import uuid

import httpx
import pytest
from fastapi import APIRouter

from app.core.problems import ApiProblem
from app.main import create_app


@pytest.mark.asyncio
async def test_application_factory_generates_openapi_without_runtime_secrets() -> None:
    app = create_app()
    schema = app.openapi()

    assert schema["openapi"].startswith("3.")
    assert "/api/v1/health/live" in schema["paths"]
    assert "/api/v1/meta" in schema["paths"]
    assert "/health/live" not in schema["paths"]


@pytest.mark.asyncio
async def test_trace_id_accepts_only_uuid_and_is_returned() -> None:
    app = create_app()
    transport = httpx.ASGITransport(app=app)
    supplied = str(uuid.uuid4())
    async with httpx.AsyncClient(transport=transport, base_url="http://test") as client:
        accepted = await client.get("/api/v1/health/live", headers={"x-request-id": supplied})
        replaced = await client.get(
            "/api/v1/health/live",
            headers={"x-request-id": "secret-or-unbounded-client-value"},
        )

    assert accepted.headers["x-request-id"] == supplied
    assert uuid.UUID(replaced.headers["x-request-id"])
    assert replaced.headers["x-request-id"] != "secret-or-unbounded-client-value"


@pytest.mark.asyncio
async def test_formal_api_problem_is_sanitized_and_traceable() -> None:
    app = create_app()
    router = APIRouter()

    @router.get("/api/v1/problem-test")
    async def fail() -> None:
        raise ApiProblem(
            status=409,
            code="VERSION_CONFLICT",
            title="Version conflict",
            detail="The resource changed; reload and retry.",
        )

    app.include_router(router)
    transport = httpx.ASGITransport(app=app)
    async with httpx.AsyncClient(transport=transport, base_url="http://test") as client:
        response = await client.get("/api/v1/problem-test")

    payload = response.json()
    assert response.status_code == 409
    assert response.headers["content-type"].startswith("application/problem+json")
    assert payload["code"] == "VERSION_CONFLICT"
    assert uuid.UUID(payload["trace_id"])
    assert payload["field_errors"] == []