#!/usr/bin/python2.5

#

# Copyright 2009 the Melange authors.

#

# 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.

"""Starts an interactive shell with statistic helpers.

"""

__authors__ = [

  '"Sverre Rabbelier" <sverre@rabbelier.nl>',

]

import cPickle

import datetime

import operator

import sys

import time

import interactive

def dateFetch(queryGen, last=None, batchSize=100):

  """Iterator that yields an entity in batches.

  Args:

    queryGen: should return a Query object

    last: used to .filter() for last_modified_on

    batchSize: how many entities to retrieve in one datastore call

  Retrieved from http://tinyurl.com/d887ll (AppEngine cookbook).

  """

  from google.appengine.ext import db

   # AppEngine will not fetch more than 1000 results

  batchSize = min(batchSize,1000)

  query = None

  done = False

  count = 0

  while not done:

    print count

    query = queryGen()

    query.order('last_modified_on')

    if last:

      query.filter("last_modified_on > ", last)

    results = query.fetch(batchSize)

    for result in results:

      count += 1

      yield result

    if batchSize > len(results):

      done = True

    else:

      last = results[-1].last_modified_on

def addKey(target, fieldname):

  """Adds the key of the specified field.

  """

  result = target.copy()

  result['%s_key' % fieldname] = target[fieldname].key().name()

  return result

def getEntities(model):

  """Returns all users as dictionary.

  """

  def wrapped():

    gen = lambda: model.all()

    it = interactive.deepFetch(gen)

    entities = [(i.key().name(), i) for i in it]

    return dict(entities)

  return wrapped

def getProps(last=None):

  """Returns all proposals as a list of dictionaries.

  """

  key_order = [

      'link_id', 'scope_path', 'title', 'abstract', 'content',

      'additional_info', '_mentor', 'possible_mentors', 'score',

      'status', '_org', 'created_on', 'last_modified_on']

  from soc.models.student_proposal import StudentProposal

  gen = lambda: StudentProposal.all()

  it = dateFetch(gen, last)

  proposals = [(i.key().name(), i.toDict(key_order)) for i in it]

  if proposals:

    last = i.last_modified_on # last modified entity

  else:

    last = datetime.datetime.now()

  return dict(proposals), last

def orgStats(target, orgs):

  """Retrieves org stats.

  """

  from soc.logic import dicts

  orgs = [(v.key(), v) for k, v in orgs.iteritems()]

  orgs = dict(orgs)

  grouped = dicts.groupby(target.values(), '_org')

  grouped = [(orgs[k], v) for k, v in grouped.iteritems()]

  popularity = [(k.link_id, len(v)) for k, v in grouped]

  return dict(grouped), dict(popularity)

def countStudentsWithProposals():

  """Retrieves number of Students who have submitted at least one Student Proposal.

  """

  proposals = getStudentProposals()

  students = {}

  for proposal_key in proposals.keys():

    students[proposals[proposal_key].scope_path] = True

  return len(students)

def printPopularity(popularity):

  """Prints the popularity for the specified proposals.

  """

  g = operator.itemgetter(1)

  for item in sorted(popularity.iteritems(), key=g, reverse=True):

    print "%s: %d" % item

def saveValues(values, saver):

  """Saves the specified popularities.

  """

  import logging

  from google.appengine.ext import db

  from soc.models.organization import Organization

  def txn(key, value):

    org = Organization.get_by_key_name(key)

    saver(org, value)

    org.put()

  for key, value in sorted(values.iteritems()):

    print key

    db.run_in_transaction_custom_retries(10, txn, key, value)

  print "done"

def addFollower(follower, proposals, add_public=True, add_private=True):

  """Adds a user as follower to the specified proposals.

  Args:

    follower: the User to add as follower

    proposals: a list with the StudnetProposals that should be subscribed to

    add_public: whether the user is subscribed to public updates

    add_private: whether the user should be subscribed to private updates

  """

  from soc.models.review_follower import ReviewFollower

  result = []

  for i in proposals:

     properties = {

       'user': follower,

       'link_id': follower.link_id,

       'scope': i,

       'scope_path': i.key().name(),

       'key_name': '%s/%s' % (i.key().name(), follower.link_id),

       'subscribed_public': add_public,

       'subscribed_private': add_private,

     }

     entity = ReviewFollower(**properties)

     result.append(entity)

  return result

def convertProposals(org):

  """Convert all proposals for the specified organization.

  Args:

    org: the organization for which all proposals will be converted

  """

  from soc.logic.models.student_proposal import logic as proposal_logic

  from soc.logic.models.student_project import logic as project_logic

  proposals = proposal_logic.getProposalsToBeAcceptedForOrg(org)

  print "accepting %d proposals, with %d slots" % (len(proposals), org.slots)

  for proposal in proposals:

    fields = {

        'link_id': 't%i' % (int(time.time()*100)),

        'scope_path': proposal.org.key().id_or_name(),

        'scope': proposal.org,

        'program': proposal.program,

        'student': proposal.scope,

        'title': proposal.title,

        'abstract': proposal.abstract,

        'mentor': proposal.mentor,

        }

    project = project_logic.updateOrCreateFromFields(fields, silent=True)

    fields = {

        'status':'accepted',

        }

    proposal_logic.updateEntityProperties(proposal, fields, silent=True)

  fields = {

      'status': ['new', 'pending'],

      'org': org,

      }

  querygen = lambda: proposal_logic.getQueryForFields(fields)

  proposals = [i for i in interactive.deepFetch(querygen, batchSize=10)]

  print "rejecting %d proposals" % len(proposals)

  fields = {

      'status': 'rejected',

      }

  for proposal in proposals:

    proposal_logic.updateEntityProperties(proposal, fields, silent=True)

def startSpam():

  """Creates the job that is responsible for sending mails.

  """

  from soc.logic.models.job import logic as job_logic

  from soc.logic.models.priority_group import logic as priority_logic

  from soc.logic.models.program import logic as program_logic

  program_entity = program_logic.getFromKeyName('google/gsoc2009')

  priority_group = priority_logic.getGroup(priority_logic.EMAIL)

  job_fields = {

      'priority_group': priority_group,

      'task_name': 'setupStudentProposalMailing',

      'key_data': [program_entity.key()]}

  job_logic.updateOrCreateFromFields(job_fields)

def reviveJobs(amount):

  """Sets jobs that are stuck in 'aborted' to waiting.

  Args:

    amount: the amount of jobs to revive

  """

  from soc.models.job import Job

  query = Job.all().filter('status', 'aborted')

  jobs = query.fetch(amount)

  if not jobs:

    print "no dead jobs"

  for job in jobs:

     job.status = 'waiting'

     job.put()

     print "restarted %d" % job.key().id()

def deidleJobs(amount):

  """Sets jobs that are stuck in 'started' to waiting.

  Args:

    amount: the amount of jobs to deidle

  """

  from soc.models.job import Job

  query = Job.all().filter('status', 'started')

  jobs = query.fetch(amount)

  if not jobs:

    print "no idle jobs"

  for job in jobs:

     job.status = 'waiting'

     job.put()

     print "restarted %d" % job.key().id()

def deleteEntities(model, step_size=25):

  """Deletes all entities of the specified type

  """

  print "Deleting..."

  count = 0

  while True:

    entities = model.all().fetch(step_size)

    if not entities:

      break

    for entity in entities:

      entity.delete()

    count += step_size

    print "deleted %d entities" % count

  print "Done"

def loadPickle(name):

  """Loads a pickle.

  """

  f = open(name + '.dat')

  return cPickle.load(f)

def dumpPickle(target, name):

  """Dumps a pickle.

  """

  f = open("%s.dat" % name, 'w')

  cPickle.dump(target, f)

def main(args):

  """Main routine.

  """

  interactive.setup()

  from soc.models.organization import Organization

  from soc.models.user import User

  from soc.models.student import Student

  from soc.models.mentor import Mentor

  from soc.models.org_admin import OrgAdmin

  from soc.models.job import Job

  from soc.models.student_proposal import StudentProposal

  from soc.models.student_project import StudentProject

  def slotSaver(org, value):

    org.slots = value

  def popSaver(org, value):

    org.nr_applications = value

  def rawSaver(org, value):

    org.slots_calculated = value

  context = {

      'load': loadPickle,

      'dump': dumpPickle,

      'orgStats': orgStats,

      'printPopularity': printPopularity,

      'saveValues': saveValues,

      'getEntities': getEntities,

      'deleteEntities': deleteEntities,

      'getOrgs': getEntities(Organization),

      'getUsers': getEntities(User),

      'getStudents': getEntities(Student),

      'getMentors': getEntities(Mentor),

      'getOrgAdmins': getEntities(OrgAdmin),

      'getProps': getProps,

      'countStudentsWithProposals': countStudentsWithProposals,

      'convertProposals': convertProposals,

      'addFollower': addFollower,

      'Organization': Organization,

      'Job': Job,

      'User': User,

      'Student': Student,

      'Mentor': Mentor,

      'OrgAdmin': OrgAdmin,

      'StudentProject': StudentProject,

      'StudentProposal': StudentProposal,

      'slotSaver': slotSaver,

      'popSaver': popSaver,

      'rawSaver': rawSaver,

      'startSpam': startSpam,

      'reviveJobs': reviveJobs,

      'deidleJobs': deidleJobs,

  }

  interactive.remote(args, context)

if __name__ == '__main__':

  if len(sys.argv) < 2:

    print "Usage: %s app_id [host]" % (sys.argv[0],)

    sys.exit(1)

  main(sys.argv[1:])