# This is "standalone mode"
from reactpy.backend import ReactPy

app = ReactPy(my_component)

# This is "middleware mode"
from reactpy.backend import ReactPy
from sanic import Sanic

sanic = Sanic()
app = ReactPy(sanic)

import re

from asgiref.compatibility import guarantee_single_callable


class ReactPy:
    def __init__(
        self,
        application=None,
        dispatcher_url="reactpy/stream/${route}${query}",
        modules_url="reactpy/modules",
        static_url="reactpy/assets",
    ) -> None:
        self.user_app = guarantee_single_callable(application)
        self.url_patterns = "|".join((dispatcher_url, modules_url, static_url))

    async def __call__(self, scope, receive, send) -> None:
        """The ASGI callable. This determines whether ReactPy should route the the
        request to ourselves or to the user application."""
        if not self.user_app or re.match(self.url_patterns, scope["path"]):
            await self.reactpy_app(scope, receive, send)
        else:
            await self.user_app(scope, receive, send)

    async def reactpy_app(self, scope, send, receive) -> None:
        """The ASGI application for ReactPy."""
        # This will handle the following: `index.html` view, component dispatcher, web modules, and static files.