"""Smoke tests for openapi_first.app."""

import types

import pytest
from fastapi.testclient import TestClient

from openapi_first.app import OpenAPIFirstApp
from openapi_first.errors import MissingOperationHandler

SPEC = {
    "openapi": "3.0.3",
    "info": {"title": "App API", "version": "1.0.0"},
    "servers": [{"url": "https://api.example.com/v1"}],
    "paths": {
        "/health": {
            "get": {
                "operationId": "get_health",
                "responses": {"200": {"description": "OK"}},
            }
        },
        "/greet/{name}": {
            "get": {
                "operationId": "get_greet",
                "parameters": [
                    {
                        "name": "name",
                        "in": "path",
                        "required": True,
                        "schema": {"type": "string"},
                    }
                ],
                "responses": {"200": {"description": "OK"}},
            }
        },
    },
}


def _routes_module():
    module = types.ModuleType("smoke_routes")

    def get_health():
        return {"status": "ok"}

    def get_greet(name: str):
        return {"greeting": f"Hello, {name}"}

    module.get_health = get_health
    module.get_greet = get_greet
    return module


@pytest.fixture
def spec_file(tmp_path):
    import json

    path = tmp_path / "openapi.json"
    path.write_text(json.dumps(SPEC), encoding="utf-8")
    return str(path)


def test_app_routes_served(spec_file):
    app = OpenAPIFirstApp(openapi_path=spec_file, routes_module=_routes_module())
    client = TestClient(app)
    response = client.get("/health")
    assert response.status_code == 200
    assert response.json() == {"status": "ok"}


def test_app_path_param_route(spec_file):
    app = OpenAPIFirstApp(openapi_path=spec_file, routes_module=_routes_module())
    client = TestClient(app)
    response = client.get("/greet/Ada")
    assert response.status_code == 200
    assert response.json() == {"greeting": "Hello, Ada"}


def test_app_overrides_openapi_schema(spec_file):
    app = OpenAPIFirstApp(openapi_path=spec_file, routes_module=_routes_module())
    openapi = app.openapi()
    assert openapi["info"]["title"] == "App API"
    assert "/health" in openapi["paths"]


def test_app_missing_handler_fails_at_startup(spec_file):
    empty = types.ModuleType("empty_routes")
    with pytest.raises(MissingOperationHandler):
        OpenAPIFirstApp(openapi_path=spec_file, routes_module=empty)