from django.http import HttpResponse
from django.db.models import Q
from django.db import transaction
from django.contrib.auth.models import User


import json

from postgresqleu.util.auth import authenticate_backend_group
from postgresqleu.auth import user_search, user_import


def search(request):
    authenticate_backend_group(request, 'Invoice managers')

    term = request.GET['term']
    upstream = request.GET.get('upstream', False)

    users = User.objects.filter(
        Q(username__icontains=term) |
        Q(first_name__icontains=term) |
        Q(last_name__icontains=term) |
        Q(email__icontains=term)
        )
    if users:
        return HttpResponse(json.dumps([{'ui': u.id, 'u': u.username, 'n': u.first_name + ' ' + u.last_name, 'e': u.email} for u in users]), content_type='application/json')

    if not upstream:
        return HttpResponse('[]', content_type='application/json')

    # Perform upstream search
    users = user_search(term)
    # All users need a negative id so we can differentiate them
    for n in range(0, len(users)):
        users[n]['i'] = -1 - n
    return HttpResponse(json.dumps([{'ui': u['i'],
                                     'u': u['u'],
                                     'n': u['f'] + ' ' + u['l'],
                                     'e': u['e'],
                                     } for u in users]), content_type='application/json')


@transaction.atomic
def importuser(request):
    authenticate_backend_group(request, 'Invoice managers')

    uid = request.POST['uid']
    try:
        user_import(uid)
    except Exception as e:
        return HttpResponse('%s' % e, content_type='text/plain')

    return HttpResponse('OK', content_type='text/plain')