"""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.
# This function is for demonstration and testing only.
def getPaymentDetails(category, student):
    surcharge_1 = surcharge_2 = surcharge_3 = 0
    p_item = u''
    amount = 0
    error = u''
    p_session = student['studycourse'].current_session
    session = str(p_session)
    try:
        academic_session = getSite()['configuration'][session]
    except KeyError:
        error = u'Session configuration object is not available.'
        return (amount, p_item, p_session,
            surcharge_1, surcharge_2, surcharge_3, error)
    if category == 'schoolfee':
        amount = academic_session.fee_1
        surcharge_1 = academic_session.surcharge_1
        surcharge_2 = academic_session.surcharge_2
        surcharge_3 = academic_session.surcharge_3
        p_item = student['studycourse'].certificate.code
    elif category == 'clearance':
        p_item = student['studycourse'].certificate.code
        amount = academic_session.fee_2
    return (amount, p_item, p_session,
        surcharge_1, surcharge_2, surcharge_3, error)