## $Id: utils.py 13509 2015-11-27 05:03:19Z 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
##
from time import time
from zope.component import createObject, getUtility
from waeup.kofa.interfaces import (IKofaUtils,
    CLEARED, RETURNING, PAID, REGISTERED, VALIDATED)
from kofacustom.nigeria.students.utils import NigeriaStudentsUtils
from kofacustom.wdu.interfaces import MessageFactory as _

class CustomStudentsUtils(NigeriaStudentsUtils):
    """A collection of customized methods.

    """

    # refix
    STUDENT_ID_PREFIX = u'D'

    def setPaymentDetails(self, category, student,
            previous_session, previous_level):
        """Create Payment object and set the payment data of a student for
        the payment category specified.

        """
        p_item = u''
        amount = 0.0
        if previous_session:
            if previous_session < student['studycourse'].entry_session:
                return _('The previous session must not fall below '
                         'your entry session.'), None
            if category == 'schoolfee':
                # School fee is always paid for the following session
                if previous_session > student['studycourse'].current_session:
                    return _('This is not a previous session.'), None
            else:
                if previous_session > student['studycourse'].current_session - 1:
                    return _('This is not a previous session.'), None
            p_session = previous_session
            p_level = previous_level
            p_current = False
        else:
            p_session = student['studycourse'].current_session
            p_level = student['studycourse'].current_level
            p_current = True
        academic_session = self._getSessionConfiguration(p_session)
        if academic_session == None:
            return _(u'Session configuration object is not available.'), None
        # Determine fee.
        if category == 'schoolfee':
            try:
                certificate = student['studycourse'].certificate
                p_item = certificate.code
            except (AttributeError, TypeError):
                return _('Study course data are incomplete.'), None
            if previous_session:
                # Students can pay for previous sessions in all
                # workflow states.  Fresh students are excluded by the
                # update method of the PreviousPaymentAddFormPage.
                if previous_level == 100:
                    amount = getattr(
                        academic_session, 'school_fee_fresh', 0.0)
                else:
                    amount = getattr(
                        academic_session, 'school_fee_returning', 0.0)
            else:
                if student.state == CLEARED:
                    amount = getattr(
                        academic_session, 'school_fee_fresh', 0.0)
                elif student.state == RETURNING:
                    # In case of returning school fee payment the
                    # payment session and level contain the values of
                    # the session the student has paid for. Payment
                    # session is always next session.
                    p_session, p_level = self.getReturningData(student)
                    academic_session = self._getSessionConfiguration(p_session)
                    if academic_session == None:
                        return _(
                            u'Session configuration object is not available.'
                            ), None
                    amount = getattr(
                        academic_session, 'school_fee_returning', 0.0)
                elif student.is_postgrad and student.state == PAID:
                    # Returning postgraduate students also pay for the
                    # next session but their level always remains the
                    # same.
                    p_session += 1
                    academic_session = self._getSessionConfiguration(p_session)
                    if academic_session == None:
                        return _(
                            u'Session configuration object is not available.'
                            ), None
                    amount = 0.0 # not yet configured
        elif category == 'clearance':
            try:
                p_item = student['studycourse'].certificate.code
            except (AttributeError, TypeError):
                return _('Study course data are incomplete.'), None
            amount = academic_session.clearance_fee
        elif category == 'bed_allocation':
            p_item = self.getAccommodationDetails(student)['bt']
            amount = academic_session.booking_fee
        elif category == 'hostel_maintenance':
            amount = 0.0
            bedticket = student['accommodation'].get(
                str(student.current_session), None)
            if bedticket is not None and bedticket.bed is not None:
                p_item = bedticket.bed_coordinates
                if bedticket.bed.__parent__.maint_fee > 0:
                    amount = bedticket.bed.__parent__.maint_fee
                else:
                    # fallback
                    amount = academic_session.maint_fee
            else:
                return _(u'No bed allocated.'), None
        elif category == 'transcript':
            amount = academic_session.transcript_fee
        if amount in (0.0, None):
            return _('Amount could not be determined.'), None
        if self.samePaymentMade(student, category, p_item, p_session):
            return _('This type of payment has already been made.'), None
        if self._isPaymentDisabled(p_session, category, student):
            return _('Payment temporarily disabled.'), None
        payment = createObject(u'waeup.StudentOnlinePayment')
        timestamp = ("%d" % int(time()*10000))[1:]
        payment.p_id = "p%s" % timestamp
        payment.p_category = category
        payment.p_item = p_item
        payment.p_session = p_session
        payment.p_level = p_level
        payment.p_current = p_current
        payment.amount_auth = amount
        return None, payment