from __future__ import print_function
from twisted.python import log
from twisted.internet import reactor, endpoints
from twisted.application import service
from twisted.web import server, static, resource
from .endpoint_service import ServerEndpointService
from wormhole import __version__
from .database import get_db
from .relay_server import Relay
from .transit_server import Transit

class Root(resource.Resource):
    # child_FOO is a nevow thing, not a twisted.web.resource thing
    def __init__(self):
        resource.Resource.__init__(self)
        self.putChild(b"", static.Data(b"Wormhole Relay\n", "text/plain"))

class PrivacyEnhancedSite(server.Site):
    logRequests = True
    def log(self, request):
        if self.logRequests:
            return server.Site.log(self, request)

class RelayServer(service.MultiService):
    def __init__(self, relayport, transitport, advertise_version,
                 db_url=":memory:", blur_usage=None):
        service.MultiService.__init__(self)
        self._blur_usage = blur_usage
        self.db = get_db(db_url)
        welcome = {
            "current_version": __version__,
            # adding .motd will cause all clients to display the message,
            # then keep running normally
            #"motd": "Welcome to the public relay.\nPlease enjoy this service.",
            #
            # adding .error will cause all clients to fail, with this message
            #"error": "This server has been disabled, see URL for details.",
            }
        if advertise_version:
            welcome["current_version"] = advertise_version
        self.root = Root()
        site = PrivacyEnhancedSite(self.root)
        if blur_usage:
            site.logRequests = False
        r = endpoints.serverFromString(reactor, relayport)
        self.relayport_service = ServerEndpointService(r, site)
        self.relayport_service.setServiceParent(self)
        self.relay = Relay(self.db, welcome, blur_usage) # accessible from tests
        self.relay.setServiceParent(self) # for the pruning timer
        self.root.putChild(b"wormhole-relay", self.relay)
        if transitport:
            self.transit = Transit(self.db, blur_usage)
            self.transit.setServiceParent(self) # for the timer
            t = endpoints.serverFromString(reactor, transitport)
            self.transport_service = ServerEndpointService(t, self.transit)
            self.transport_service.setServiceParent(self)

    def startService(self):
        service.MultiService.startService(self)
        log.msg("Wormhole relay server (Rendezvous and Transit) running")
        if self._blur_usage:
            log.msg("blurring access times to %d seconds" % self._blur_usage)
            log.msg("not logging HTTP requests")
        else:
            log.msg("not blurring access times")