## $Id: utils.py 9811 2012-12-18 17:25:36Z 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
##
import grok
import random
from time import time
from zope.component import createObject, getUtility
from waeup.kofa.interfaces import CLEARED, RETURNING, PAID
from kofacustom.nigeria.students.utils import NigeriaStudentsUtils
from waeup.kofa.accesscodes import create_accesscode
from waeup.kofa.interfaces import CLEARED, RETURNING, IKofaUtils
from waeup.kofa.fees import FeeTable
from waeup.kwarapoly.interfaces import MessageFactory as _


# 10  = PreND (1)
# 100 = ND1 (2)
# 110 = ND1R (3)
# 200 = ND2 (4)
# 210 = ND2R (5)
# 300 = ND3 (6)
# 400 = HND1 (7)
# 410 = HND1R (8)
# 500 = HND2 (9)
# 510 = HND2R (10)
# 600 = HND3 (11)
# 999 = PGD (12)

PAYMENT_LEVELS = (10, 100, 110, 200, 210, 300, 400, 410, 500, 510, 600, 999)

FEES_PARAMS = (
        ('ft', 'pt'),
        ('local', 'non-local'),
        ('science','arts'),
        PAYMENT_LEVELS
    )

FEES_VALUES = (
        (
          ( # 10       100      110      200      210     300    400     410      500      510     600   999
            (34400.0, 36600.0, 28800.0, 29500.0, 28800.0, 0.0, 38700.0, 29900.0, 30700.0, 29900.0, 0.0, 47250.0), # science
            (34400.0, 35100.0, 27300.0, 28000.0, 27300.0, 0.0, 37200.0, 28400.0, 29200.0, 28400.0, 0.0, 47250.0)  # arts
          ), # local
          ( # 10       100      110      200      210     300    400     410      500      510     600   999
            (49500.0, 52100.0, 35900.0, 38850.0, 35900.0, 0.0, 55600.0, 38600.0, 40850.0, 38600.0, 0.0, 71880.0), # science
            (49500.0, 50600.0, 34400.0, 37350.0, 34400.0, 0.0, 54100.0, 37100.0, 39350.0, 37100.0, 0.0, 71880.0)  # arts
          ), # non-local
        ), # ft
        (
          ( # 10   100     110    200    210   300      400     410   500     510   600     999
            (0.0, 39400.0, 0.0, 30900.0, 0.0, 30900.0, 39900.0, 0.0, 31050.0, 0.0, 31050.0, 0.0), # science
            (0.0, 37900.0, 0.0, 29400.0, 0.0, 29400.0, 38400.0, 0.0, 29550.0, 0.0, 29550.0, 0.0)  # arts
          ), # local
          ( # 10   100     110    200    210   300      400     410   500     510   600     999
            (0.0, 54600.0, 0.0, 32350.0, 0.0, 32350.0, 57100.0, 0.0, 42350.0, 0.0, 42350.0, 0.0), # science
            (0.0, 53100.0, 0.0, 30850.0, 0.0, 30850.0, 55600.0, 0.0, 40850.0, 0.0, 40850.0, 0.0)  # arts
          ), # non-local
        ), # pt
    )

SCHOOL_FEES = FeeTable(FEES_PARAMS, FEES_VALUES)

def local_nonlocal(student):
    lga = getattr(student, 'lga')
    if lga and lga.startswith('kwara'):
        return 'local'
    else:
        return 'non-local'

def arts_science(student):
    if student.faccode == 'IFMS':
        return 'arts'
    else:
        return 'science'

def pt_ft(student):
    if student.current_mode.endswith('pt'):
        return 'pt'
    else:
        return 'ft'

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

    """


    def selectBed(self, available_beds):
        """Randomly select a bed from a list of available beds.

        """
        return random.choice(available_beds)

    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=None, previous_level=None):
        """Create Payment object and set the payment data of a student for
        the payment category specified.

        """
        details = {}
        p_item = u''
        amount = 0.0
        error = u''
        if previous_session:
            return _('Previous session payment not yet implemented.'), None
        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 == 'transfer':
            amount = academic_session.transfer_fee
        elif category == 'gown':
            amount = academic_session.gown_fee
        elif category == 'bed_allocation':
            amount = academic_session.booking_fee
        elif category == 'hostel_maintenance':
            amount = academic_session.maint_fee
        elif category == 'clearance':
            amount = academic_session.clearance_fee
            try:
                p_item = student['studycourse'].certificate.code
            except (AttributeError, TypeError):
                return _('Study course data are incomplete.'), None
        elif category == 'schoolfee':
            try:
                certificate = student['studycourse'].certificate
                p_item = certificate.code
            except (AttributeError, TypeError):
                return _('Study course data are incomplete.'), None
            if student.state == RETURNING:
                # Override p_session and p_level
                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 student.state in (RETURNING, CLEARED):
                if p_level in PAYMENT_LEVELS:
                    amount = SCHOOL_FEES.get_fee(
                        (pt_ft(student),
                         local_nonlocal(student),
                         arts_science(student),
                         p_level)
                        )
        elif category == 'carryover1':
            amount = 6000.0
        elif category == 'carryover2':
            amount = 7000.0
        elif category == 'carryover3':
            amount = 8000.0
        if amount in (0.0, None):
            return _(u'Amount could not be determined.'), None
        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 _('This type of payment has already been made.'), None
        if category.startswith('carryover'):
            p_item = getUtility(IKofaUtils).PAYMENT_CATEGORIES[category]
            p_item = unicode(p_item)
            # Now we change the category to reduce the number of categories.
            category = 'schoolfee'
        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 = float(amount)
        return None, payment

    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)
        current_level = studycourse.current_level
        if None in (current_level, certificate):
            return d
        end_level = certificate.end_level
        if current_level == 10:
            bt = 'pr'
        elif current_level in (100, 400):
            bt = 'fr'
        elif current_level in (300, 600):
            bt = 'fi'
        else:
            bt = 're'
        if student.sex == 'f':
            sex = 'female'
        else:
            sex = 'male'
        special_handling = 'regular'
        d['bt'] = u'%s_%s_%s' % (special_handling,sex,bt)
        return d

    # KwaraPoly prefix
    STUDENT_ID_PREFIX = u'W'