from zope.interface import implements
from twisted.cred import portal, checkers, credentials
from nevow import guard, inevow
from webut.skin import skin
from ldaptor.config import LDAPConfig
from ldaptor.apps.webui import gadget, defskin
from ldaptor.checkers import LDAPBindingChecker

class TODOGetRidOfMeRealm:
    implements(portal.IRealm)

    def __init__(self, *args, **kwargs):
        self.args = args
        self.kwargs = kwargs

    def requestAvatar(self, avatarId, mind, *interfaces):
        if inevow.IResource not in interfaces:
            raise NotImplementedError, "no interface"

        if avatarId is checkers.ANONYMOUS:
            resource = gadget.LdaptorWebUIGadget(None, *self.args, **self.kwargs)
            resource.realm = self
            return (inevow.IResource,
                    resource,
                    lambda: None)
        else:
            resource = gadget.LdaptorWebUIGadget(avatarId, *self.args, **self.kwargs)
            resource.realm = self
            return (inevow.IResource,
                    resource,
                    lambda: None)

def getResource(cfg=None, skinFactory=None):
    """Get a resource for the Ldaptor-webui app."""

    if cfg is None:
        cfg = LDAPConfig()

    checker = LDAPBindingChecker(cfg)
    realm = TODOGetRidOfMeRealm(config=cfg)
    porta = portal.Portal(realm)
    porta.registerChecker(checkers.AllowAnonymousAccess(), credentials.IAnonymous)
    porta.registerChecker(checker)

    mainResource = guard.SessionWrapper(porta)

    if skinFactory is None:
        skinFactory = defskin.DefaultSkin

    return skin.Skinner(skinFactory, mainResource)