#
# Copyright (c) 2004 Conectiva, Inc.
#
# Written by Gustavo Niemeyer <niemeyer@conectiva.com>
#
# This file is part of Smart Package Manager.
#
# Smart Package Manager 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 2 of the License, or (at
# your option) any later version.
#
# Smart Package Manager 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 Smart Package Manager; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
from smart.transaction import Transaction, PolicyRemove, REMOVE
from smart.option import OptionParser
from smart.cache import Package
from smart import *
import string
import re

USAGE=_("smart remove [options] package ...")

DESCRIPTION=_("""
This command will remove one or more packages which
are currently installed in the system.
""")

EXAMPLES=_("""
smart remove pkgname
smart remove '*kgnam*'
smart remove pkgname-1.0
smart remove pkgname-1.0-1
smart remove pkgname1 pkgname2
""")

def option_parser():
    parser = OptionParser(usage=USAGE,
                          description=DESCRIPTION,
                          examples=EXAMPLES)
    parser.add_option("--stepped", action="store_true",
                      help=_("split operation in steps"))
    parser.add_option("--urls", action="store_true",
                      help=_("dump needed urls and don't commit operation"))
    parser.add_option("--metalink", action="store_true",
                      help=_("dump metalink xml and don't commit operation"))
    parser.add_option("--download", action="store_true",
                      help=_("download packages and don't commit operation"))
    parser.add_option("--explain", action="store_true",
                      help=_("include additional information about changes,"
                             "when possible"))
    parser.add_option("-y", "--yes", action="store_true",
                      help=_("do not ask for confirmation"))
    parser.add_option("--auto", action="store_true",
                      help=_("use the auto-install information to "
                             "remove stuff."))
    parser.add_option("--dump", action="store_true",
                      help=_("dump package names and versions to stderr but "
                             "don't commit operation"))
    return parser

def parse_options(argv):
    parser = option_parser()
    opts, args = parser.parse_args(argv)
    opts.args = args
    return opts

def main(ctrl, opts):

    # Argument check
    if not opts.args:
        raise Error, _("no package(s) given")

    if opts.explain:
        sysconf.set("explain-changesets", True, soft=True)

    if sysconf.get("auto-update"):
        from smart.commands import update
        updateopts = update.parse_options([])
        update.main(ctrl, updateopts)
    else:
        ctrl.reloadChannels()
    cache = ctrl.getCache()
    trans = Transaction(cache, PolicyRemove)
    policy = trans.getPolicy()

    if opts.auto:
        rmcs = ctrl.markAndSweep()
        confirm = not opts.yes
        ctrl.commitChangeSet(rmcs, confirm=confirm)
    
    for arg in opts.args:

        ratio, results, suggestions = ctrl.search(arg)

        if not results:
            if suggestions:
                dct = {}
                for r, obj in suggestions:
                    if isinstance(obj, Package):
                        if obj.installed:
                            dct[obj] = True
                    else:
                        for pkg in obj.packages:
                            if pkg.installed:
                                dct[pkg] = True
                if not dct:
                    del suggestions[:]
            if suggestions:
                raise Error, _("'%s' matches no packages. "
                               "Suggestions:\n%s") % \
                             (arg, "\n".join(["    "+str(x) for x in dct]))
            else:
                raise Error, _("'%s' matches no packages") % arg

        pkgs = []

        for obj in results:
            if isinstance(obj, Package):
                pkgs.append(obj)

        if not pkgs:
            for obj in results:
                for pkg in obj.packages:
                    pkgs.append(pkg)

        found = False
        for pkg in pkgs:
            if pkg.installed:
                found = True
                trans.enqueue(pkg, REMOVE)
            else:
                policy.setLocked(pkg, True)
        if not found:
            iface.warning(_("'%s' matches no installed packages") % arg)

    iface.showStatus(_("Computing transaction..."))
    trans.run()
    iface.hideStatus()
    if trans:
        confirm = not opts.yes
        if opts.urls:
            ctrl.dumpTransactionURLs(trans)
        elif opts.metalink:
            ctrl.dumpTransactionMetalink(trans)
        elif opts.dump:
            ctrl.dumpTransactionPackages(trans, remove=True)
        elif opts.download:
            ctrl.downloadTransaction(trans, confirm=confirm)
        elif opts.stepped:
            ctrl.commitTransactionStepped(trans, confirm=confirm)
        else:
            ctrl.commitTransaction(trans, confirm=confirm)

# vim:ts=4:sw=4:et
