## $Id: payment.py 8708 2012-06-13 13:29:35Z henrik $
##
## Copyright (C) 2011 Uli Fouquet & Henrik Bettermann
## 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
##
"""
Application fee payment.
"""
import grok
import sys
from hurry.workflow.interfaces import (
    IWorkflowInfo, InvalidTransitionError)
from zope.component.interfaces import IFactory
from zope.interface import implementedBy
from waeup.kofa.interfaces import MessageFactory as _
from waeup.kofa.payments import OnlinePayment
from waeup.kofa.payments.interfaces import IPaymentWebservice
from waeup.kofa.applicants.interfaces import IApplicantOnlinePayment
from waeup.kofa.utils.helpers import attrs_to_fields

class ApplicantOnlinePayment(OnlinePayment):
    """This is an online payment.
    """
    grok.implements(IApplicantOnlinePayment)
    grok.provides(IApplicantOnlinePayment)

    def __init__(self):
        super(ApplicantOnlinePayment, self).__init__()
        return

    def doAfterApplicantPaymentApproval(self):
        """Process applicant after payment was approved.
        """
        wf_info = IWorkflowInfo(self.__parent__)
        try:
            wf_info.fireTransition('approve')
        except InvalidTransitionError:
            msg = log = 'Error: %s' % sys.exc_info()[1]
            return False, msg, log
        log = 'payment approved: %s' % self.p_id
        msg = _('Payment approved')
        return False, msg, log

    def doAfterApplicantPayment(self):
        """Process applicant after payment was made.
        """
        wf_info = IWorkflowInfo(self.__parent__)
        try:
            wf_info.fireTransition('pay')
        except InvalidTransitionError:
            msg = log = 'Error: %s' % sys.exc_info()[1]
            return False, msg, log
        log = 'successful payment: %s' % self.p_id
        msg = _('Successful payment')
        return False, msg, log

    def approveApplicantPayment(self):
        """Approve payment and process applicant.
        """
        if self.p_state == 'paid':
            return False, _('This ticket has already been paid.'), None
        self.approve()
        return self.doAfterApplicantPaymentApproval()

ApplicantOnlinePayment = attrs_to_fields(ApplicantOnlinePayment)

class PaymentWebservice(grok.Adapter):
    """An adapter to publish applicant data through a webservice.
    """
    grok.context(IApplicantOnlinePayment)
    grok.implements(IPaymentWebservice)

    @property
    def display_fullname(self):
        "Name of  payee."
        return self.context.__parent__.display_fullname

    @property
    def id(self):
        "Id of payee"
        return self.context.__parent__.applicant_id

    @property
    def faculty(self):
        "Faculty of payee"
        return ''

    @property
    def department(self):
        "Department of payee"
        return ''

# Applicant online payments must be importable. So we might need a factory.
class ApplicantOnlinePaymentFactory(grok.GlobalUtility):
    """A factory for applicant online payments.
    """
    grok.implements(IFactory)
    grok.name(u'waeup.ApplicantOnlinePayment')
    title = u"Create a new online payment.",
    description = u"This factory instantiates new online payment instances."

    def __call__(self, *args, **kw):
        return ApplicantOnlinePayment()

    def getInterfaces(self):
        return implementedBy(ApplicantOnlinePayment)