#!/usr/bin/python
#
# pull-lp-source -- pull a source package from Launchpad
# Basic usage: pull-lp-source <source package> [<release>]
#
# Copyright (C) 2008,      Iain Lane <iain@orangesquash.org.uk>,
#               2010-2011, Stefano Rivera <stefanor@ubuntu.com>
#
# ##################################################################
#
# 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; either version 3
# of the License, or (at your option) any later version.
#
# 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.
#
# See file /usr/share/common-licenses/GPL for more details.
#
# ##################################################################


import json
import os
import sys
import urllib2
from optparse import OptionParser

from distro_info import UbuntuDistroInfo, DistroDataOutdated

from ubuntutools.archive import UbuntuSourcePackage, DownloadError
from ubuntutools.config import UDTConfig
from ubuntutools.lp.lpapicache import Distribution, Launchpad
from ubuntutools.lp.udtexceptions import (SeriesNotFoundException,
                                          PackageNotFoundException,
                                          PocketDoesNotExistError)
from ubuntutools.logger import Logger
from ubuntutools.misc import split_release_pocket


def source_package_for(binary, release):
    """Query DDE to find the source package for a particular binary
    Should really do this with LP, but it's not possible LP: #597041
    """
    url = ('http://dde.debian.net/dde/q/udd/dist/d:ubuntu/r:%s/p:%s/?t=json'
           % (release, binary))
    data = None
    try:
        data = json.load(urllib2.urlopen(url))['r']
    except urllib2.URLError, e:
        Logger.error('Unable to retrieve package information from DDE: '
                     '%s (%s)', url, str(e))
    except ValueError, e:
        Logger.error('Unable to parse JSON response from DDE: '
                     '%s (%s)', url, str(e))
    if not data:
        return None
    return data[0]['source']


def main():
    usage = "Usage: %prog <package> [release|version]"
    opt_parser = OptionParser(usage)
    opt_parser.add_option('-d', '--download-only',
                          dest='download_only', default=False,
                          action='store_true',
                          help="Do not extract the source package")
    opt_parser.add_option('-m', '--mirror', metavar='UBUNTU_MIRROR',
                          dest='ubuntu_mirror',
                          help='Preferred Ubuntu mirror (default: Launchpad)')
    opt_parser.add_option('--no-conf',
                          dest='no_conf', default=False, action='store_true',
                          help="Don't read config files or environment "
                               "variables")
    (options, args) = opt_parser.parse_args()
    if not args:
        opt_parser.error("Must specify package name")

    config = UDTConfig(options.no_conf)
    if options.ubuntu_mirror is None:
        options.ubuntu_mirror = config.get_value('UBUNTU_MIRROR')

    # Login anonymously to LP
    Launchpad.login_anonymously()

    package = str(args[0]).lower()

    ubuntu_info = UbuntuDistroInfo()
    if len(args) > 1:  # Custom distribution specified.
        version = str(args[1])
    else:
        try:
            version = os.getenv('DIST') or ubuntu_info.devel()
        except DistroDataOutdated, e:
            Logger.warn("%s\nOr specify a distribution.", e)
            sys.exit(1)
    component = None

    # Release, not package version number:
    release = None
    pocket = None
    try:
        (release, pocket) = split_release_pocket(version, default=None)
    except PocketDoesNotExistError, e:
        pass
    if release in ubuntu_info.all:
        archive = Distribution('ubuntu').getArchive()
        try:
            spph = archive.getSourcePackage(package, release, pocket)
        except SeriesNotFoundException, e:
            Logger.error(str(e))
            sys.exit(1)
        except PackageNotFoundException, e:
            source_package = source_package_for(package, release)
            if source_package is not None and source_package != package:
                try:
                    spph = archive.getSourcePackage(source_package, release,
                                                    pocket)
                    package = source_package
                except PackageNotFoundException:
                    Logger.error(str(e))
                    sys.exit(1)
            else:
                Logger.error(str(e))
                sys.exit(1)

        version = spph.getVersion()
        component = spph.getComponent()

    Logger.normal('Downloading %s version %s', package, version)
    srcpkg = UbuntuSourcePackage(package, version, component=component,
                                 mirrors=[options.ubuntu_mirror])
    try:
        srcpkg.pull()
    except DownloadError, e:
        Logger.error('Failed to download: %s', str(e))
        sys.exit(1)
    if not options.download_only:
        srcpkg.unpack()


if __name__ == '__main__':
    try:
        main()
    except KeyboardInterrupt:
        Logger.normal('User abort.')