"""General helper functions for the student section.
"""
from grok import getSite
from random import SystemRandom as r
from waeup.sirp.interfaces import academic_sessions_vocab

def generate_student_id(students,letter):
    if letter == '?':
        letter= r().choice('ABCDEFGHKLMNPQRSTUVWXY')
    sid = u"%c%d" % (letter,r().randint(99999,1000000))
    while sid in students.keys():
        sid = u"%c%d" % (letter,r().randint(99999,1000000))
    return sid

def set_returning_data(student):
    student['studycourse'].current_level += 100
    student['studycourse'].current_session += 1
    verdict = student['studycourse'].current_verdict
    student['studycourse'].current_verdict = '0'
    student['studycourse'].previous_verdict = verdict
    return

# To be specified in customization packages, see also view which
# calls the function.
# This function is for demonstration and testing only.
def getPaymentDetails(category, student):
    d = {}
    d['p_item'] = u''
    d['amount'] = 0
    d['error'] = u''
    d['p_session'] = student['studycourse'].current_session
    session = str(d['p_session'])
    try:
        academic_session = getSite()['configuration'][session]
    except KeyError:
        d['error'] = u'Session configuration object is not available.'
        return d
    d['surcharge_1'] = academic_session.surcharge_1
    d['surcharge_2'] = academic_session.surcharge_2
    d['surcharge_3'] = academic_session.surcharge_3
    if category == 'schoolfee':
        d['amount'] = academic_session.fee_1
        d['p_item'] = student['studycourse'].certificate.code
    elif category == 'clearance':
        d['p_item'] = student['studycourse'].certificate.code
        d['amount'] = academic_session.fee_2
    elif category == 'bed_allocation':
        d['p_item'] = getAccommodationDetails(student)['bt']
        d['amount'] = academic_session.booking_fee
    return d

# To be specified in customization packages, see also view which
# calls the function.
# This function is for demonstration and testing only.
def getAccommodationDetails(student):
    d = {}
    d['error'] = u''
    site_confoguration = getSite()['configuration']
    d['booking_session'] = site_confoguration.accommodation_session
    d['allowed_states'] = site_confoguration.accommodation_states
    session = str(d['booking_session'])
    # Determine bed type
    studycourse = student['studycourse']
    entry_session = studycourse.entry_session
    current_level = studycourse.current_level
    end_level = studycourse.certificate.end_level
    if entry_session == getSite()['configuration'].accommodation_session:
        bt = 'fr'
    elif current_level >= end_level:
        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

# To be specified in customization packages, see also view which
# calls the function.
# I the standard configuration we select the first bed found,
# but can also randomize the selection if we like.
def selectBed(available_beds):
    return available_beds[0]