#!/usr/bin/python
#
# Copyright (C) 2011, Stefano Rivera <stefanor@debian.org>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

import optparse

from distro_info import UbuntuDistroInfo

from ubuntutools.rdepends import rdepends


def main():
    parser = optparse.OptionParser('%progname [options] package')
    parser.add_option('-r', '--release', metavar='RELEASE',
                      default=UbuntuDistroInfo().devel(),
                      help='Query dependencies in RELEASE. Default: devel')
    parser.add_option('-R', '--without-recommends',
                      action='store_false', dest='recommends', default=True,
                      help='Only examine Depends relationships, '
                           'not Recommends.')
    parser.add_option('-s', '--with-suggests',
                      action='store_true', dest='suggests', default=False,
                      help='Also consider Suggests relationships.')
    parser.add_option('-b', '--build-depends',
                      action='store_const', dest='arch', const='source',
                      help='Query build dependencies (synonym for '
                            '--arch=source')
    parser.add_option('-a', '--arch', metavar='ARCH', default='i386',
                      help='Query dependencies in ARCH'
                           '(default: i386)')
    parser.add_option('-u', '--service-url', metavar='URL',
                      dest='server', default=None,
                      help='Reverse Depedencies webservice URL'
                           '(default: UbuntuWire)')

    options, args = parser.parse_args()

    if len(args) != 1:
        parser.error("One (and only one) package must be specified")
    package = args[0]

    opts = {}
    if options.server is not None:
        opts['server'] = options.server

    data = rdepends(package, options.release, options.arch, **opts)

    if options.arch == 'source':
        fields = ('Build-Depends', 'Build-Depends-Indep')
    else:
        fields = ['Depends']
    if options.recommends:
        fields.append('Recommends')
    if options.suggests:
        fields.append('Suggests')

    result = set()
    for field in fields:
        result.update(data.get(field, []))

    print u'\n'.join(sorted(list(result)))

if __name__ == '__main__':
    main()