## $Id: utils.py 15449 2019-06-03 12:22:28Z 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
import grok
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.edopoly.interfaces import MessageFactory as _

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

    """

    # prefix
    STUDENT_ID_PREFIX = u'U'

    def warnCreditsOOR(self, studylevel, course=None):
        """No maximum credits.
        """
        return

    def GPABoundaries(self, faccode=None, depcode=None,
                            certcode=None, student=None):
        if student and student.current_mode.startswith('dp'):
                return ((1, 'IRNS / NER / NYV'),
                        (2, 'Pass'),
                        (2.5, 'Lower Credit'),
                        (3, 'Upper Credit'),
                        (3.5, 'Distinction'))
        elif student:
            return ((1, 'FRNS / NER / NYV'),
                    (1.5, 'Pass'),
                    (2.4, '3rd Class Honours'),
                    (3.5, '2nd Class Honours Lower Division'),
                    (4.5, '2nd Class Honours Upper Division'),
                    (5, '1st Class Honours'))
        # Session Results Presentations depend on certificate
        results = None
        if certcode:
            cat = queryUtility(ICatalog, name='certificates_catalog')
            results = list(
                cat.searchResults(code=(certcode, certcode)))
        if results and results[0].study_mode.startswith('dp'):
            return ((1, 'IRNS / NER / NYV'),
                    (2, 'Pass'),
                    (2.5, 'Lower Credit'),
                    (3, 'Upper Credit'),
                    (3.5, 'Distinction'))
        else:
            return ((1, 'FRNS / NER / NYV'),
                    (1.5, 'Pass'),
                    (2.4, '3rd Class Honours'),
                    (3.5, '2nd Class Honours Lower Division'),
                    (4.5, '2nd Class Honours Upper Division'),
                    (5, '1st Class Honours'))

    def getClassFromCGPA(self, gpa, student):
        gpa_boundaries = self.GPABoundaries(student=student)
        if gpa < gpa_boundaries[0][0]:
            return 0, gpa_boundaries[0][1]
        if gpa < gpa_boundaries[1][0]:
            return 1, gpa_boundaries[1][1]
        if gpa < gpa_boundaries[2][0]:
            return 2, gpa_boundaries[2][1]
        if gpa < gpa_boundaries[3][0]:
            return 3, gpa_boundaries[3][1]
        if gpa < gpa_boundaries[4][0]:
            return 4, gpa_boundaries[4][1]
        if gpa <= gpa_boundaries[5][0]:
            return 5, gpa_boundaries[5][1]
        return 'N/A'

    def _requiredPaymentsMade(self, student, session):
        # SIWESS fee requirement removed on 18/01/2019
        req_payments = ('ict_entre', 'logbook_combo')
        req_payments_titles = 'ICT and Logbook'
        # All ND and HND part time do not pay for LOGBOOK
        if student.current_mode.endswith('_pt'):
            req_payments = ('ict_entre',)
            req_payments_titles = 'ICT'
        # HND1 and HND2 full time do not pay for LOGBOOK
        elif student.current_mode == 'hnd_ft' and student.state in (
            CLEARED, RETURNING):
            req_payments = ('ict_entre',)
            req_payments_titles = 'ICT'
        # ND2 FULL TIME do not pay LOGBOOK
        elif student.current_mode == 'nd_ft' and student.state == RETURNING:
            req_payments = ('ict_entre',)
            req_payments_titles = 'ICT'
        num = 0
        if len(student['payments']):
            for ticket in student['payments'].values():
                if ticket.p_state == 'paid' and \
                    ticket.p_category in req_payments and \
                    ticket.p_session == session:
                    num += 1
            if num == len(req_payments):
                return True, None
        return False, req_payments_titles

    def samePaymentMade(self, student, category, p_item, p_session):
        if category in ('transcript',):
            return False
        for key in student['payments'].keys():
            ticket = student['payments'][key]
            if ticket.p_state == 'paid' and\
               ticket.p_category == category and \
               ticket.p_item == p_item and \
               ticket.p_session == p_session:
                  return True
        return False

    def setPaymentDetails(self, category, student,
            previous_session=None, previous_level=None):
        """Create a payment ticket 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
        # The following three fees are part of the school fee which must be
        # paid before tuition fee. They are paid for next session.
        if category in ('ict_entre', 'logbook_combo', 'siwess_combo') and \
            student.state == RETURNING and not previous_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
        # 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:
                amount = getattr(certificate, 'school_fee_1', 0.0)
            else:
                if student.state == CLEARED:
                    amount = getattr(certificate, 'school_fee_1', 0.0)
                elif student.state == RETURNING:
                    amount = getattr(certificate, 'school_fee_1', 0.0)
                    # 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
                elif student.is_postgrad and student.state == PAID:
                    # Returning postgraduate students also pay for the
                    # next session but their level always remains the
                    # same.
                    amount = getattr(certificate, 'school_fee_1', 0.0)
                    p_session += 1
                    academic_session = self._getSessionConfiguration(p_session)
                    if academic_session == None:
                        return _(
                            u'Session configuration object is not available.'
                            ), None
            rpm, rpt = self._requiredPaymentsMade(student, p_session)
            if not rpm:
                return 'Pay %s fee(s) first.' % rpt, None
        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 == 'ict_entre':
            amount = 11000.0
            if student['studycourse'].entry_session < 2018:
                amount = 16000.0
        else:
            fee_name = category + '_fee'
            amount = getattr(academic_session, fee_name, 0.0)
        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 _('This category of payments has been 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

    def constructMatricNumber(self, student):
        faccode = student.faccode
        #depcode = student.depcode
        #certcode = student.certcode
        year = unicode(student.entry_session)[2:]
        if not student.state in (PAID, ) or not student.is_fresh:
            return _('Matriculation number cannot be set.'), None

        # SASND1809001
        if student.current_mode == 'nd_ft':
            next_integer = grok.getSite()['configuration'].next_matric_integer
            if next_integer == 0:
                return _('Matriculation number cannot be set.'), None
            return None, "%s/ND/%s/%05d" % (faccode, year, next_integer)

        # SASNH1809001
        if student.current_mode == 'hnd_ft':
            next_integer = grok.getSite()['configuration'].next_matric_integer_2
            if next_integer == 0:
                return _('Matriculation number cannot be set.'), None
            return None, "%s/HD/%s/%05d" % (faccode, year, next_integer)

        # SASPT1809001
        if student.current_mode in ('nd_pt', 'hnd_pt'):
            next_integer = grok.getSite()['configuration'].next_matric_integer_3
            if next_integer == 0:
                return _('Matriculation number cannot be set.'), None
            return None, "%s/PT/%s/%05d" % (faccode, year, next_integer)

        return _('Matriculation number cannot be set.'), None


    def increaseMatricInteger(self, student):
        """Increase counter for matric numbers.
        """
        if student.current_mode == 'nd_ft':
            grok.getSite()['configuration'].next_matric_integer += 1
            return
        elif student.current_mode == 'hnd_ft':
            grok.getSite()['configuration'].next_matric_integer_2 += 1
            return
        elif student.current_mode in ('nd_pt', 'hnd_pt'):
            grok.getSite()['configuration'].next_matric_integer_3 += 1
            return
        return

    def getAccommodationDetails(self, student):
        """Determine the accommodation data of a student.
        """
        d = {}
        d['error'] = u''
        hostels = grok.getSite()['hostels']
        d['booking_session'] = hostels.accommodation_session
        d['allowed_states'] = hostels.accommodation_states
        d['startdate'] = hostels.startdate
        d['enddate'] = hostels.enddate
        d['expired'] = hostels.expired
        # Determine bed type
        studycourse = student['studycourse']
        certificate = getattr(studycourse,'certificate',None)
        entry_session = studycourse.entry_session
        current_level = studycourse.current_level
        if None in (entry_session, current_level, certificate):
            return d
        bt = 'all'
        if student.sex == 'f':
            sex = 'female'
        else:
            sex = 'male'
        special_handling = 'regular'
        d['bt'] = u'%s_%s_%s' % (special_handling,sex,bt)
        return d