# coding=utf-8
import os
import django
import sys

sys.path.append("/var/www/projects/lms/")
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "lms.settings")
django.setup()
from finance.models import Bill
from access.models import User
from courses.models import Course

result = {}
for user in User.objects.all():
    result[user.email] = dict({course.id: False for course in Course.objects.all()})
for bill in Bill.objects.filter(status='F').order_by('date'):
    if result[bill.user.email][bill.service.course.id]:
        bill.delete()
    else:
        result[bill.user.email][bill.service.course.id] = True