from __future__ import (absolute_import, print_function, division)

from .layer import Layer, ServerConnectionMixin
from .tls import TlsLayer


class ReverseProxy(Layer, ServerConnectionMixin):
    def __init__(self, ctx, server_address, client_tls, server_tls):
        super(ReverseProxy, self).__init__(ctx, server_address=server_address)
        self._client_tls = client_tls
        self._server_tls = server_tls

    def __call__(self):
        # Always use a TLS layer here; if someone changes the scheme, there needs to be a
        # TLS layer underneath.
        layer = TlsLayer(self, self._client_tls, self._server_tls)

        try:
            layer()
        finally:
            if self.server_conn:
                self._disconnect()