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import pytest  # isort:skip

pytest.importorskip("flask")  # isort:skip

import logging

from flask import Flask, signals

import elasticapm
from elasticapm.conf.constants import ERROR, SPAN, TRANSACTION


@pytest.fixture
def flask_app_instrumented(wrapper_instrument):
    app = Flask(__name__)

    @app.route("/")
    def hello_world():
        with elasticapm.capture_span("test"):
            pass
        return "<p>Hello, World!</p>"

    return app


def test_flask_auto_instrumentation(elasticapm_client, flask_app_instrumented):
    """
    Just a basic flask test, but testing without the `flask_apm_client` fixture
    to make sure that auto instrumentation of Flask apps is working.
    """
    client = flask_app_instrumented.test_client()
    response = client.get("/")
    response.close()
    assert response.status_code == 200
    assert len(elasticapm_client.events[ERROR]) == 0
    assert len(elasticapm_client.events[TRANSACTION]) == 1
    assert len(elasticapm_client.events[SPAN]) == 1
