#!/usr/bin/env python
# Copyright 2016 The Fuchsia 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.

"""The Cobalt command-line interface."""

import argparse
import logging
import os
import shutil
import subprocess
import sys

import analyzers.analyzer as analyzer
import fake_data.generate_fake_data as fake_data
import randomizers.randomizer as randomizer
import shufflers.shuffler as shuffler
import tests.e2e.end_to_end_test as end_to_end_test
import utils.file_util as file_util
import visualization.generate_data_js as visualization

THIS_DIR = os.path.dirname(__file__)

_logger = logging.getLogger()
_verbose_count = 0

# Should public key encryption be used for communication between the
# Randomizers and the Analyzers via the Shufflers?
_use_public_key_encryption=True

def _initLogging(verbose_count):
  """Ensures that the logger (obtained via logging.getLogger(), as usual) is
  initialized, with the log level set as appropriate for |verbose_count|
  instances of --verbose on the command line."""
  assert(verbose_count >= 0)
  if verbose_count == 0:
    level = logging.WARNING
  elif verbose_count == 1:
    level = logging.INFO
  else:  # verbose_count >= 2
    level = logging.DEBUG
  logging.basicConfig(format="%(relativeCreated).3f:%(levelname)s:%(message)s")
  logger = logging.getLogger()
  logger.setLevel(level)
  logger.debug("Initialized logging: verbose_count=%d, level=%d" %
               (verbose_count, level))
  logger.debug("_use_public_key_encryption=%s" % _use_public_key_encryption)

def _build_fastrand():
  savedir = os.getcwd()
  os.chdir(os.path.join(THIS_DIR, 'third_party', 'fastrand'))
  subprocess.call(['./build.sh'])
  os.chdir(savedir)

def _build_fastem():
  savedir = os.getcwd()
  os.chdir(os.path.join(THIS_DIR, 'third_party', 'rappor', 'analysis',
                        'cpp'))
  subprocess.call(['./run.sh', 'build-fast-em'])
  os.chdir(savedir)

def _build():
  _build_fastrand()
  _build_fastem()

def _run_end_to_end_test():
  _run_all()
  end_to_end_test.check_results()

def _test():
  _run_end_to_end_test()

def _clean_all():
  print "Deleting the out directory..."
  shutil.rmtree(file_util.OUT_DIR, ignore_errors=True)

def _generate():
  # Generates fake data and runs the straight-counting pipeline
  fake_data.main()

def _randomize():
  # Run the randomizers
  randomizer.readAndRandomize(_use_public_key_encryption)

def _shuffle():
  # Run the shufflers
  shuffler.main()

def _analyze():
  # Run the analyzers
  analyzer.runAllAnalyzers(_use_public_key_encryption)

def _visualize():
  # Generate the visualization
  visualization.main()

def _run_all():
  _clean_all()
  _generate()
  _randomize()
  _shuffle()
  _analyze()
  _visualize()
  print "Done."

def main():
  parser = argparse.ArgumentParser(description='The Cobalt command-line '
      'interface.')

  # Note(rudominer) A note about the handling of optional arguments here.
  # We create |parent_parser| and make it a parent of all of our sub parsers.
  # When we want to add a global optional argument (i.e. one that applies
  # to all sub-commands such as --verbose) we add the optional argument
  # to both |parent_parser| and |parser|. The reason for this is that
  # that appears to be the only way to get the help string  to show up both
  # when the top-level command is invoked and when
  # a sub-command is invoked.
  #
  # In other words when the user types:
  #
  #                python cobalt.py -h
  #
  # and also when the user types
  #
  #                python cobalt.py run -h
  #
  # we want to show the help for the --verbose option.
  parent_parser = argparse.ArgumentParser(add_help=False)

  parser.add_argument('--verbose',
    help='Be verbose (multiple times for more)',
    default=0, dest='verbose_count', action='count')
  parent_parser.add_argument('--verbose',
    help='Be verbose (multiple times for more)',
    default=0, dest='verbose_count', action='count')


  parser.add_argument('--no-use-encryption',
    help='Do not us public key encryption for communication between the '
    'randomizers and the analyzers via the shufflers. By default encryption '
    'is used.',
    dest="use_encryption", action='store_false')
  parent_parser.add_argument('--no-use-encryption',
    help='Do not us public key encryption for communication between the '
    'randomizers and the analyzers via the shufflers. By default encryption '
    'is used.',
    dest="use_encryption", action='store_false')

  subparsers = parser.add_subparsers()

  sub_parser = subparsers.add_parser('build', parents=[parent_parser],
    help='Builds the Cobalt prototype pipeline.')
  sub_parser.set_defaults(func=_build)

  sub_parser = subparsers.add_parser('run', parents=[parent_parser],
    help='Runs the synthetic data generator, the straight '
    'counting pipeline and the Cobalt prototype pipeline.'
    'This is equivalent to: clean, gen, randomize, shuffle, analyze, '
    'visualize.')
  sub_parser.set_defaults(func=_run_all)

  sub_parser = subparsers.add_parser('test', parents=[parent_parser],
    help='Runs the Cobalt tests.')
  sub_parser.set_defaults(func=_test)

  sub_parser = subparsers.add_parser('clean', parents=[parent_parser],
    help='Deletes the out directory.')
  sub_parser.set_defaults(func=_clean_all)

  sub_parser = subparsers.add_parser('gen', parents=[parent_parser],
    help='Generates fake input data and runs the straight counting pipeline.')
  sub_parser.set_defaults(func=_generate)

  sub_parser = subparsers.add_parser('randomize', parents=[parent_parser],
    help='Runs all the randomizers in Cobalt prototype pipeline.')
  sub_parser.set_defaults(func=_randomize)

  sub_parser = subparsers.add_parser('shuffle', parents=[parent_parser],
    help='Runs all the shufflers in Cobalt prototype pipeline.')
  sub_parser.set_defaults(func=_shuffle)

  sub_parser = subparsers.add_parser('analyze', parents=[parent_parser],
    help='Runs all the analyzers in Cobalt prototype pipeline.')
  sub_parser.set_defaults(func=_analyze)

  sub_parser = subparsers.add_parser('visualize', parents=[parent_parser],
    help='Generates the visualization data from Cobalt prototype pipeline.')
  sub_parser.set_defaults(func=_visualize)

  args = parser.parse_args()
  global _verbose_count
  _verbose_count = args.verbose_count
  global _use_public_key_encryption
  _use_public_key_encryption = args.use_encryption
  _initLogging(_verbose_count)

  return args.func()


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