## $Id: utils.py 15023 2018-05-24 10:02:07Z 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,
    ADMITTED, CLEARED, RETURNING, PAID, REGISTERED, VALIDATED)
from kofacustom.nigeria.students.utils import NigeriaStudentsUtils
from kofacustom.dspg.interfaces import MessageFactory as _


def local(student):
    lga = getattr(student, 'lga')
    if lga and lga.startswith('delta'):
        return True
    return False

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

    # prefix
    STUDENT_ID_PREFIX = u'P'

    def _dep_sug_paymentMade(self, student, session):
        if len(student['payments']):
            for ticket in student['payments'].values():
                if ticket.p_state == 'paid' and \
                    ticket.p_category == 'dep_sug' and \
                    ticket.p_session == session:
                    return True
        return False

    def getReturningData(self, student):
        """ This method defines what happens after school fee payment
        of returning students depending on the student's senate verdict.
        """
        prev_level = student['studycourse'].current_level
        cur_verdict = student['studycourse'].current_verdict
        if cur_verdict in ('A','B','L','M','N','Z',):
            # Successful student
            new_level = divmod(int(prev_level),100)[0]*100 + 100
        elif cur_verdict == 'C':
            # Student on probation
            new_level = int(prev_level) + 10
        else:
            # Student is somehow in an undefined state.
            # Level has to be set manually.
            new_level = prev_level
        new_session = student['studycourse'].current_session + 1
        return new_session, new_level

    def setPaymentDetails(self, category, student,
            previous_session, previous_level):
        """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
        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:
                    if local(student):
                        amount = getattr(certificate, 'school_fee_1', 0.0)
                    else:
                        amount = getattr(certificate, 'school_fee_3', 0.0)
                else:
                    if local(student):
                        amount = getattr(certificate, 'school_fee_2', 0.0)
                    else:
                        amount = getattr(certificate, 'school_fee_4', 0.0)
            else:
                # Students are only allowed to pay school fee 
                # if current session dep_sug payment has been made.
                if student.faccode != 'SPAT' and not self._dep_sug_paymentMade(
                    student, student.current_session):
                    return _('You have to pay NADESU/SA/SUG Dues first.'), None
                if student.state == CLEARED:
                    if local(student):
                        amount = getattr(certificate, 'school_fee_1', 0.0)
                    else:
                        amount = getattr(certificate, 'school_fee_3', 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
                    if local(student):
                        amount = getattr(certificate, 'school_fee_2', 0.0)
                    else:
                        amount = getattr(certificate, 'school_fee_4', 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
                    if local(student):
                        amount = getattr(certificate, 'school_fee_2', 0.0)
                    else:
                        amount = getattr(certificate, 'school_fee_4', 0.0)
        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
            # Local ND and HND students are given a rebate which has
            # to be adjusted if the basic acceptance fee changes.
            if student.current_mode == 'nd_ft' and local(student):
                amount -= 10000.0
            if student.current_mode == 'hnd_ft' and local(student):
                amount -= 5000.0
        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 == 'carryover1':
            amount = 10000.0
        elif category == 'carryover2':
            amount = 10000.0
        elif category == 'carryover3':
            amount = 10000.0
        elif category == 'carryover4':
            amount = 13000.0
        elif category == 'dep_sug':
            amount = 3150.0 # includes GATEWAY_AMT
            if student.faccode == 'SPAT':
            #    amount = 1650.0 # includes GATEWAY_AMT
                amount = 0.0
        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 warnCreditsOOR(self, studylevel, course=None):
        """Return message if credits are out of range. In the base
        package only maximum credits is set.
        """
        if course and studylevel.total_credits + course.credits > 80:
            return _('Maximum credits exceeded.')
        elif studylevel.total_credits > 80:
            return _('Maximum credits exceeded.')
        return

    #: A tuple containing names of file upload viewlets which are not shown
    #: on the `StudentClearanceManageFormPage`. Nothing is being skipped
    #: in the base package. This attribute makes only sense, if intermediate
    #: custom packages are being used, like we do for all Nigerian portals.
    SKIP_UPLOAD_VIEWLETS = ('acceptanceletterupload',
                            'higherqualificationresultupload',
                            'advancedlevelresultupload',
                            'evidencenameupload',
                            'refereeletterupload',
                            'statutorydeclarationupload',
                            'firstsittingresultupload',
                            'secondsittingresultupload',
                            'certificateupload',
                            'resultstatementupload',
                            )

    #: A tuple containing the names of registration states in which changing of
    #: passport pictures is allowed.
    PORTRAIT_CHANGE_STATES = (ADMITTED, RETURNING,)