#!/usr/bin/env python
# -*- coding: utf-8 -*-
# -*- Python -*-
#
'''
This script merges two Person records into one.  It determines which record is the target
based on most current User record (last_login) unless -f (force) option is used to
force SOURCE TARGET as specified on the command line.  The order of operations is
important.  We must complete all source.save() operations before moving the aliases to
the target, this is to avoid extra "Possible duplicate Person" emails going out, if the
Person is saved without an alias the Person.save() creates another one, which then
conflicts with the moved one.
'''

# Set PYTHONPATH and load environment variables for standalone script -----------------
import os, sys
basedir = os.path.abspath(os.path.join(os.path.dirname(__file__), "../.."))
sys.path = [ basedir ] + sys.path
os.environ["DJANGO_SETTINGS_MODULE"] = "ietf.settings"

virtualenv_activation = os.path.join(basedir, "env", "bin", "activate_this.py")
if os.path.exists(virtualenv_activation):
    execfile(virtualenv_activation, dict(__file__=virtualenv_activation))

import django
django.setup()
# -------------------------------------------------------------------------------------

import argparse
from django.contrib import admin
from ietf.person.models import Person
from ietf.person.utils import (merge_persons, send_merge_notification, handle_users,
    determine_merge_order)


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("source_id",type=int)
    parser.add_argument("target_id",type=int)
    parser.add_argument('-f','--force', help='force merge order',action='store_true')
    parser.add_argument('-v','--verbose', help='verbose output',action='store_true')
    args = parser.parse_args()

    source = Person.objects.get(pk=args.source_id)
    target = Person.objects.get(pk=args.target_id)

    # set merge order
    if not args.force:
        source,target = determine_merge_order(source,target)

    # confirm
    print "Merging person {}({}) to {}({})".format(source.ascii,source.pk,target.ascii,target.pk)
    print handle_users(source,target,check_only=True)
    response = raw_input('Ok to continue y/n? ')
    if response.lower() != 'y':
        sys.exit()

    # perform merge
    success, changes = merge_persons(source, target, verbose=args.verbose)

    # send email notification
    send_merge_notification(target,changes)

if __name__ == "__main__":
    main()