#
#  Copyright (c) 2007 Helmut Merz helmutm@cy55.de
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

"""
Basic browser view classes for composer.schema.

$Id$
"""

from zope import component
from zope.cachedescriptors.property import Lazy

from cybertools.organize.interfaces import IClientRegistrations, IRegistrationTemplate
from cybertools.composer.schema.browser.common import BaseView
from cybertools.composer.schema.interfaces import IClientFactory


class ServiceManagerView(object):

    def __init__(self, context, request):
        self.context = context
        self.request = request

    def findRegistrationTemplate(self, service):
        """ Find a registration template that provides the registration
            for the service given.
        """
        for tpl in self.context.getClientSchemas():
            if IRegistrationTemplate.providedBy(tpl):
                # TODO: check that service is really provided by this template
                return tpl
        return None


class ServiceView(object):

    def __init__(self, context, request):
        self.context = context
        self.request = request

    def getRegistrations(self):
        return self.context.registrations


class RegistrationTemplateView(BaseView):

    @Lazy
    def services(self):
        return self.getServices()

    def getServices(self):
        return self.context.getServices().values()

    def getRegistrations(self):
        if not self.clientName:
            form = self.request.form
            self.clientName = form.get('id')
        clientName = self.clientName
        if not clientName:
            return []
        manager = self.context.getManager()
        client = manager.getClients().get(clientName)
        if client is None:
            return []
        regs = IClientRegistrations(client)
        regs.template = self.context
        return regs.getRegistrations()

    def getRegistratedServicesTokens(self):
        return [r.service.token for r in self.getRegistrations()]

    def update(self):
        form = self.request.form
        if not self.clientName:
            self.clientName = form.get('id')
        clientName = self.clientName
        if not form.get('action'):
            return True
        manager = self.context.getManager()
        if clientName:
            client = manager.getClients().get(clientName)
            if client is None:
                return True
        else:
            client = IClientFactory(manager)()
            clientName = self.clientName = manager.addClient(client)
        regs = IClientRegistrations(client)
        regs.template = self.context
        allServices = self.getServices()
        oldServices = [r.service for r in regs.getRegistrations()]
        newServices = [manager.getServices()[token]
                       for token in form.get('service_tokens', [])]
        regs.register(newServices)
        toDelete = [s for s in oldServices
                      if s in allServices and s not in newServices]
        regs.unregister(toDelete)
        #return True
        self.request.response.redirect(self.nextUrl())
        return False