#!/usr/bin/env python
# vim: set fileencoding=utf-8 :
# Laurent El Shafey <laurent.el-shafey@idiap.ch>
# Fri Aug 23 16:51:41 CEST 2013
#
# Copyright (C) 2011-2014 Idiap Research Institute, Martigny, Switzerland
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

"""
Commands the Polarimetric Thermal Database can respond to.
"""

import os
import sys

from bob.db.base.driver import Interface as BaseInterface

def dumplist(args):
  """Dumps lists of files based on your criteria"""

  from .query import Database
  db = Database()

  r = db.objects(
      purposes=args.purpose,
      groups=args.group,
  )

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

  for f in r:
    output.write('%s\n' % f.make_path(directory=args.directory,extension=args.extension))

  return 0

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

  from .query import Database
  db = Database()

  r = db.objects()

  # go through all files, check if they are available on the filesystem
  good = []
  bad = []
  for f in r:
    if os.path.exists(f.make_path(args.directory, args.extension)): good.append(f)
    else: bad.append(f)

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

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

  return 0


class Interface(BaseInterface):

  def name(self):
    return 'pola_thermal'

  def version(self):
    import pkg_resources  # part of setuptools
    return pkg_resources.require('bob.db.%s' % self.name())[0].version

  def files(self):

    from pkg_resources import resource_filename
    raw_files = ('db.sql3',)
    return [resource_filename(__name__, k) for k in raw_files]

  def type(self):
    return 'sqlite'


  def add_commands(self, parser):

    from . import __doc__ as docs

    subparsers = self.setup_parser(parser,
      "Polarimetric Thermal Database", docs)

    import argparse
    from .query import Database
    db = Database()

    # example: get the "create" action from a submodule
    from .create import add_command as create_command
    create_command(subparsers)

    # the "dumplist" action
    parser = subparsers.add_parser('dumplist', help=dumplist.__doc__)
    parser.add_argument('-d', '--directory', default='', help="if given, this path will be prepended to every entry returned.")
    parser.add_argument('-e', '--extension', default='', help="if given, this extension will be appended to every entry returned.")
    parser.add_argument('-u', '--purpose', help="if given, this value will limit the output files to those designed for the given purposes.", choices=('enrol', 'probe', ''))
    parser.add_argument('-g', '--group', help="if given, this value will limit the output files to those belonging to a particular protocolar group.", choices=('dev', 'eval', 'world', 'optional_world_1', 'optional_world_2', ''))
    parser.add_argument('--self-test', dest="selftest", action='store_true', help=argparse.SUPPRESS)
    parser.set_defaults(func=dumplist) #action

    # the "checkfiles" action
    parser = subparsers.add_parser('checkfiles', help=checkfiles.__doc__)
    parser.add_argument('-l', '--list-directory', required=True, help="The directory which contains the file lists.")
    parser.add_argument('-d', '--directory', dest="directory", default='', help="if given, this path will be prepended to every entry returned.")
    parser.add_argument('-e', '--extension', dest="extension", default='', help="if given, this extension will be appended to every entry returned.")
    parser.add_argument('--self-test', dest="selftest", action='store_true', help=argparse.SUPPRESS)

    parser.set_defaults(func=checkfiles) #action
