from aiohttp.web import Application, Response, get, HTTPBadRequest, HTTPInternalServerError, HTTPNotFound
from .dispatcher import dispatcher
from .utils import _
from .context import Context
from .error import CallError, NotAllowedError


async def handle(request):
    version, uri = request.match_info.get_info()['path'].split('/', 2)[-2:]
    context = Context()
    context.username = request.match_info.get('username', "Anonymous")
    try:
        text = await dispatcher.call(version, uri, context, id=2, public_only=True)
    except NotAllowedError as err:
        raise HTTPNotFound(reason=_(f'the message {version}.{uri} is private'))
    except CallError as err:
        raise HTTPBadRequest(reason=str(err))
    except Exception as err:
        raise HTTPInternalServerError(reason=str(err))

    return Response(text=str(text))


def get_app():
    app = Application()
    routes = []
    uris = list(dispatcher.uris.items())
    uris.sort()
    for version, uris in dispatcher.uris.items():
        print()
        print(_('======== Registered messages ========'))
        for uri in uris:
            web_uri = f'/{version}/{uri}'
            if dispatcher.messages[uri]:
                print(f'  - {web_uri}')
            else:
                print(f'  - {web_uri} (private)')
            routes.append(get(web_uri, handle))
        print()
    app.add_routes(routes)
    return app