#!/usr/bin/env python
# vim: set fileencoding=utf-8 :
# Andre Anjos <andre.anjos@idiap.ch>
# Tue 20 Mar 19:20:22 2012 CET

"""Checks for installed files.
"""

import os
import sys

# Driver API
# ==========

def checkfiles(args):
  """Checks existence files based on your criteria"""

  from .query import Database
  db = Database()

  r = db.files(
      directory=args.directory,
      extension=args.extension,
      protocol=args.protocol, 
      support=args.support, 
      groups=args.group,
      cls=args.cls,
      light=args.light,
      )

  # go through all files, check if they are available on the filesystem
  good = {}
  bad = {}
  for id, f in r.items():
    if os.path.exists(f): good[id] = f
    else: bad[id] = f

  # report
  output = sys.stdout
  if args.selftest:
    from bob.db.utils import null
    output = null()

  if bad:
    for id, f in bad.items():
      output.write('Cannot find file "%s"\n' % (f,))
    output.write('%d files (out of %d) were not found at "%s"\n' % \
        (len(bad), len(r), args.directory))

  return 0

def add_command(subparsers):
  """Add specific subcommands that the action "checkfiles" can use"""

  from argparse import SUPPRESS

  parser = subparsers.add_parser('checkfiles', help=checkfiles.__doc__)

  from .query import Database

  db = Database()

  if not db.is_valid():
    protocols = ('waiting','for','database','creation')
  else:
    protocols = db.protocols()

  parser.add_argument('-d', '--directory', dest="directory", default='', help="if given, this path will be prepended to every entry checked (defaults to '%(default)s')")
  parser.add_argument('-e', '--extension', dest="extension", default='', help="if given, this extension will be appended to every entry checked (defaults to '%(default)s')")
  parser.add_argument('-c', '--class', dest="cls", default='', help="if given, limits the check to a particular subset of the data that corresponds to the given class (defaults to '%(default)s')", choices=('real', 'attack', 'enroll'))
  parser.add_argument('-g', '--group', dest="group", default='', help="if given, this value will limit the check to those files belonging to a particular protocolar group. (defaults to '%(default)s')", choices=db.groups())
  parser.add_argument('-s', '--support', dest="support", default='', help="if given, this value will limit the check to those files using this type of attack support. (defaults to '%(default)s')", choices=db.attack_supports())
  parser.add_argument('-x', '--protocol', dest="protocol", default='', help="if given, this value will limit the check to those files for a given protocol. (defaults to '%(default)s')", choices=protocols)
  parser.add_argument('-l', '--light', dest="light", default='', help="if given, this value will limit the check to those files shot under a given lighting. (defaults to '%(default)s')", choices=db.lights())
  parser.add_argument('--self-test', dest="selftest", default=False,
      action='store_true', help=SUPPRESS)

  parser.set_defaults(func=checkfiles) #action