#! /usr/bin/env python
from __future__ import print_function
import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "relate.settings")

import django
django.setup()

from course.models import FlowPageData
import sys

course_identifier = sys.argv[1]
flow_id = sys.argv[2]
group_id = sys.argv[3]
page_id = sys.argv[4]
old_type = sys.argv[5]
new_type = sys.argv[6]

print("Changing {group_id}/{page_id} in {flow_id} in {course_identifier} "
        "from {old_type} to {new_type}".format(**locals()))

fpages = FlowPageData.objects.filter(
        flow_session__course__identifier=course_identifier,
        flow_session__flow_id=flow_id,
        group_id=group_id,
        page_id=page_id)

print(fpages.filter(flow_session__participation__isnull=False).count(),
        "non-anonymous pages")
print(fpages.count(), "pages total")

raw_input("[Enter to continue]")

from django.db import transaction
with transaction.atomic():
    for fpd in fpages:
        assert fpd.page_type == old_type
        print("Changing fpd id %d in %s's session %d" % (
            fpd.id, fpd.flow_session.participation, fpd.flow_session.id))
        fpd.page_type = new_type
        fpd.save()