#!/usr/bin/env python
#
# Copyright 2007 Google Inc.
#
# Licensed 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.
#
"""An interactive python shell that uses remote_api.

Usage:
  %prog [-s HOSTNAME] [-p PATH] [--secure] [APPID]

If the -s HOSTNAME flag is not specified, the APPID must be specified.
"""


from google.appengine.tools import os_compat

import atexit
import code
import getpass
import optparse
import os
import sys

try:
  import readline
except ImportError:
  readline = None

from google.appengine.ext.remote_api import remote_api_stub
from google.appengine.tools import appengine_rpc


from google.appengine.api import memcache
from google.appengine.api import urlfetch
from google.appengine.api import users
from google.appengine.ext import db
from google.appengine.ext import ndb


HISTORY_PATH = os.path.expanduser('~/.remote_api_shell_history')
DEFAULT_PATH = '/_ah/remote_api'
BANNER = """App Engine remote_api shell
Python %s
The db, ndb, users, urlfetch, and memcache modules are imported.\
""" % sys.version


def auth_func():
  return (raw_input('Email: '), getpass.getpass('Password: '))


def remote_api_shell(servername, appid, path, secure, rpc_server_factory):
  """Actually run the remote_api_shell."""


  remote_api_stub.ConfigureRemoteApi(appid, path, auth_func,
                                     servername=servername,
                                     save_cookies=True, secure=secure,
                                     rpc_server_factory=rpc_server_factory)
  remote_api_stub.MaybeInvokeAuthentication()


  os.environ['SERVER_SOFTWARE'] = 'Development (remote_api_shell)/1.0'

  if not appid:

    appid = os.environ['APPLICATION_ID']
  sys.ps1 = '%s> ' % appid
  if readline is not None:

    readline.parse_and_bind('tab: complete')
    atexit.register(lambda: readline.write_history_file(HISTORY_PATH))
    if os.path.exists(HISTORY_PATH):
      readline.read_history_file(HISTORY_PATH)


  if '' not in sys.path:
    sys.path.insert(0, '')

  preimported_locals = {
      'memcache': memcache,
      'urlfetch': urlfetch,
      'users': users,
      'db': db,
      'ndb': ndb,
      }


  code.interact(banner=BANNER, local=preimported_locals)


def main(argv):
  """Parse arguments and run shell."""
  parser = optparse.OptionParser(usage=__doc__)
  parser.add_option('-s', '--server', dest='server',
                    help='The hostname your app is deployed on. '
                         'Defaults to <app_id>.appspot.com.')
  parser.add_option('-p', '--path', dest='path',
                    help='The path on the server to the remote_api handler. '
                         'Defaults to %s.' % DEFAULT_PATH)
  parser.add_option('--secure', dest='secure', action="store_true",
                    default=False, help='Use HTTPS when communicating '
                                        'with the server.')
  (options, args) = parser.parse_args()


  if ((not options.server and not args) or len(args) > 2
      or (options.path and len(args) > 1)):
    parser.print_usage(sys.stderr)
    if len(args) > 2:
      print >> sys.stderr, 'Unexpected arguments: %s' % args[2:]
    elif options.path and len(args) > 1:
      print >> sys.stderr, 'Path specified twice.'
    sys.exit(1)


  servername = options.server
  appid = None
  path = options.path or DEFAULT_PATH
  if args:
    if servername:

      appid = args[0]
    else:

      servername = '%s.appspot.com' % args[0]
    if len(args) == 2:

      path = args[1]
  remote_api_shell(servername, appid, path, options.secure,
                   appengine_rpc.HttpRpcServer)


if __name__ == '__main__':
  main(sys.argv)