#!/usr/bin/env python
# Licensed to Cloudera, Inc. under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  Cloudera, Inc. licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import json
import logging
import random

from django.http import Http404
from django.utils.translation import ugettext as _
from django.views.decorators.http import require_POST

from desktop.lib.django_util import JsonResponse
from desktop.lib.i18n import force_unicode
from desktop.models import Document2
from notebook.models import Notebook

from metadata.optimizer_client import OptimizerApi
from metadata.conf import OPTIMIZER


LOG = logging.getLogger(__name__)


def error_handler(view_fn):
  def decorator(*args, **kwargs):
    try:
      return view_fn(*args, **kwargs)
    except Http404, e:
      raise e
    except Exception, e:
      LOG.exception(e)
      response = {
        'status': -1,
        'message': force_unicode(str(e))
      }
    return JsonResponse(response, status=500)
  return decorator


@require_POST
@error_handler
def top_tables(request):
  response = {'status': -1}

  database = request.POST.get('database', 'default')
  len = request.POST.get('len', 1000)

  if OPTIMIZER.MOCKING.get():
    from beeswax.server import dbms
    from beeswax.server.dbms import get_query_server_config
    db = dbms.get(request.user)
    tables = [