import os

import pytest
from .httpserver import HTTPServer


class Plugin:
    SERVER = None


class PluginHTTPServer(HTTPServer):
    def start(self):
        super().start()
        Plugin.SERVER = self

    def stop(self):
        super().stop()
        Plugin.SERVER = None


def get_httpserver_listen_address():
    listen_host = os.environ.get("PYTEST_HTTPSERVER_HOST")
    listen_port = os.environ.get("PYTEST_HTTPSERVER_PORT")
    if listen_port:
        listen_port = int(listen_port)

    return (listen_host, listen_port)


@pytest.fixture
def httpserver():
    if Plugin.SERVER:
        Plugin.SERVER.clear()
        yield Plugin.SERVER
        return

    host, port = get_httpserver_listen_address()
    if not host:
        host = HTTPServer.DEFAULT_LISTEN_HOST
    if not port:
        port = HTTPServer.DEFAULT_LISTEN_PORT

    server = PluginHTTPServer(host=host, port=port)
    server.start()
    yield server


def pytest_sessionfinish(session, exitstatus):  # pylint: disable=unused-argument
    if Plugin.SERVER is not None:
        Plugin.SERVER.clear()
        if Plugin.SERVER.is_running():
            Plugin.SERVER.stop()