#    Package administration and research tool for Debian
#    Copyright (C) 1999-2000 Jonathan D. Rosenbaum

#    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 2 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.

#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.


package SWIM::Safex;
use strict;
use Term::ReadLine;
use SWIM::Conf qw($apt_get $dpkg $tmp $HISTORY);
use SWIM::Global qw(@PACKAGES $argument $aptor_group %db);
use SWIM::DB_Library qw(:Xyz);
use SWIM::Library;  
use vars qw(@ISA @EXPORT %EXPORT_TAGS);   
use Exporter;
@ISA = qw(Exporter);
@EXPORT = qw(safex);


# when x is called
sub safex {

 my ($commands) = @_;
 my %commands = %$commands;

 if ($commands->{"x"} || $commands->{"ftp"} || $commands->{"source"} ||
     $commands->{"source_only"} || $commands->{"remove"} || $commands->{"r"} ||
     $commands->{"purge"}) {
 
  
   if (!defined @PACKAGES) {
     if ($commands->{"search"} || $commands->{"ps"} || $commands->{"research"}
         || $commands->{"refinesearch"}) {
       @PACKAGES = "NOPACKAGES";
     }
     else {
        @PACKAGES = @ARGV;
     }
   }
 
   #print "PACKAGES @PACKAGES $argument\n";

   my ($aptor,$arg);
   if (defined $argument) {
    if ($argument =~ /_/) {
     $argument =~ m,(.*)_.*,; 
     $aptor = $1;
    }
    else {
      if (($argument =~ m,/, && ($commands->{"y"} || $commands->{"z"} ||
           $commands->{"ftp"} || $commands->{"nz"})) || defined $aptor_group ||
           $commands->{"ftp"} || $commands->{"purge"} || $commands->{"remove"} ||
           $commands->{"r"}) {
       if ($PACKAGES[$#PACKAGES] =~ /_/) {
         $PACKAGES[$#PACKAGES] =~ m,(.*)_.*,; 
         $aptor = $1;
       }
       else {
         $aptor = $PACKAGES[$#PACKAGES];
       }
      }
      else { 
       $aptor = $argument;    
      }
    }
   }
   else {
      if ($commands->{"y"} || $commands->{"z"} || $commands->{"ftp"} ||
          $commands->{"nz"} || $commands->{"purge"} || $commands->{"remove"} ||
          $commands->{"r"}) {
       if ($PACKAGES[$#PACKAGES] =~ /_/) {
         $PACKAGES[$#PACKAGES] =~ m,(.*)_.*,; 
         $aptor = $1;
       }
       else {
         $aptor = $PACKAGES[$#PACKAGES];
       }
      }
   }
  
   if ($PACKAGES[$#PACKAGES] =~ m,/,) {
    $PACKAGES[$#PACKAGES] =~ m,.*/(.*)$,;
    $arg = $1;
    foreach (@PACKAGES) {
      $_  =~ m,.*/(.*)$,;
      shift @PACKAGES;
      push(@PACKAGES,$1);
    }
   }
   else {
    if ($PACKAGES[$#PACKAGES] =~ /_/) {
     $PACKAGES[$#PACKAGES] =~ m,(.*)_.*,; 
     $arg = $1;
     foreach (0 .. $#PACKAGES) {
       if ($PACKAGES[$_] =~ /_/) {
        $PACKAGES[$_]  =~ m,^(.*)_.*$,;
        $PACKAGES[$_] = $1; 
       }
       else {
        $PACKAGES[$_] = $PACKAGES[$_];
       }
     }
    }
    else {
     $arg = $PACKAGES[$#PACKAGES];
     foreach (0 .. $#PACKAGES) {
       if ($PACKAGES[$_] =~ /_/) {
        $PACKAGES[$_]  =~ m,^(.*)_.*$,;
        $PACKAGES[$_] = $1; 
       }
       else {
        $PACKAGES[$_] = $PACKAGES[$_];
       }
     }
    }
   }  

   $aptor = "DEFINEDONE" if !defined $aptor;
   if (($aptor eq  $arg) || ($commands->{"search"} ||
        $commands->{"ps"} || $commands->{"research"} ||
        $commands->{"refinesearch"} || $aptor eq "/.") && 
        $PACKAGES[0] ne "NOPACKAGES") {
     xyz(\%commands);
   }
 }


}


# swim provides a great interface to apt.  The trick is to not actually
# run apt-get until all the arguments are stored in an array.  This is
# done easily for xy and for for xyz which provides virtual installation
# and querying completion after --db && --ndb updates.  Obviously, the
# package virtually installed needs to be the same architecture as the
# machine running, since this is how apt works, but the databases can be
# in any specified directory.  This function also provides an interface for
# ftp, as well as dpkg's --remove & --purge.
sub xyz {

  my ($commands) = @_;
  my %commands = %$commands;

  if (!$commands->{"ftp"}) {
   if (!defined $apt_get) {
     print "swim: configure swimrc\n";
     exit;
   }
  }   

  # error correcting  
  if ($commands->{"ftp"} && ($commands->{"r"} || $commands->{"remove"} ||
      $commands->{"purge"})) {
    print "swim: --ftp cannot be used with ";  
    print "-r " if defined $commands->{"r"};
    print "--remove " if defined $commands->{"remove"};
    print "--purge " if defined $commands->{"purge"};
    print "\n";
    exit;
  }
  if (($commands->{"r"} || $commands->{"remove"}) && $commands->{"purge"}) {
    print "swim: ";
    print "-r " if defined $commands->{"r"};
    print "--remove " if defined $commands->{"remove"};
    print "--purge " if defined $commands->{"purge"};
    print "cannot be used together\n";
    exit;
  }
  if (($commands->{"y"} || $commands->{"z"} || $commands->{"x"} ||
       $commands->{"nz"}) && ($commands->{"ftp"} || $commands->{"purge"})) {
    print "swim: -";
    print "x" if $commands->{"x"};
    print "y" if $commands->{"y"};
    print "z" if $commands->{"z"};
    print " --nz" if $commands->{"nz"};
    print " cannot be used with ";
    print "--purge " if defined $commands->{"purge"};
    print "--ftp " if defined $commands->{"ftp"};
    print "\n";
    exit;
  }
  if (($commands->{"source"} && $commands->{"source_only"})) {
    print "swim: --source and --source_only cannot be used together\n";
    exit;
  }
  if (($commands->{"source"} || $commands->{"source_only"}) &&
       !$commands->{"ftp"}) {
    print "swim: --";
    print "source" if $commands->{"source"};
    print "source_only" if $commands->{"source_only"};
    print " cannot be used without --ftp\n";
    exit;
  }  
  if (($commands->{"y"} || $commands->{"z"} || $commands->{"nz"}) &&
       !$commands->{"x"}) {
    print "swim: requires -x option\n";
    exit;
  }

  if ($commands->{"x"}) {
   # There's no sense in doing this if the wrong architecture is called.
   if (defined $dpkg) {
    system "$dpkg --print-installation-architecture > $tmp/arch.deb";
    open(ARCH, "$tmp/arch.deb") or warn "couldn't find arch\n";
    my @arch = <ARCH>; chomp $arch[0];
    my($arch,$dist) = which_archdist(\%commands); $arch =~ m,^-(.*),;
    if ($1 ne $arch[0]) {
       print "swim: apt uses the $arch[0] architecture\n";
       exit;   
    }
   }
  }


  ###############
  # SAFETY MODE #
  ###############
  if ((($commands->{"x"} || ($commands->{"x"} && $commands->{"y"})) || 
      ($commands->{"x"} && ($commands->{"r"} || $commands->{"remove"}) ||
      ($commands->{"x"} && $commands->{"y"} && ($commands->{"r"} ||
      $commands->{"remove"})))) && 
      !($commands->{"z"} || $commands->{"nz"})) {
    my $arg;
    my $count = 0;
    foreach (@PACKAGES) {
    if ($count == 0) {  
       $arg = "$_";
     }
     else {
       $arg = $arg . " " . "$_";
     }  
      $count++;
    }
    #########
    # STDIN #
    #########
    if ($commands->{"stdin"}) {
     my $term = Term::ReadLine->new("Simple Shell");
     my @HISTORY = history(\%commands);
     $term->addhistory(@HISTORY);
     my @history; push(@history,"$arg");
     print "swim: type exit to finish --stdin\n";
     my $termcount = 0;
     while ($termcount < 1 ) {
       $_ = $term->readline('swim: ',"$arg");
       push (@history,$_);
       $termcount++;
     } do { $_ = $term->readline('swim: '); 
            push (@history,$_);
           } while  $_ ne "exit";
      $arg = $history[$#history - 1];
      if ($arg ne $HISTORY[$#HISTORY]) {
        if ($arg =~ m,^[^\w],) {
          $arg =~ s,^\s+(\w+),$1,;
        }
         history_print($arg,\%commands);
      }
    } 
    !($commands->{"r"} || $commands{"remove"}) ?
      system "$apt_get install -qs $arg" :
      system "$apt_get remove -qs $arg";
  }
  #####################
  # INSTALLATION MODE #
  #####################
  # provides optional --stdin to change packages to be installed 
  # from the command line
  else {
    my $arg;
    my $count = 0;
    foreach (@PACKAGES) {
     if ($count == 0) {  
       $arg = "$_";
     }
     else {
       $arg = $arg . " " . "$_";
     }  
      $count++;
    }
    #########
    # STDIN #
    #########
    if ($commands->{"stdin"}) {
     my $term = Term::ReadLine->new("Simple Shell");
     my @HISTORY = history(\%commands);
     $term->addhistory(@HISTORY);
     my @history; push(@history,"$arg");
     print "swim: type exit to finish --stdin\n";
     my $termcount = 0;
     while ($termcount < 1 ) {
       $_ = $term->readline('swim: ',"$arg");
       push (@history,$_);
       $termcount++;
     } do { $_ = $term->readline('swim: '); 
            push (@history,$_);
           } while  $_ ne "exit";
      $arg = $history[$#history - 1];
      if ("$arg" ne "$HISTORY[$#HISTORY]") {
        if ($arg =~ m,^[^\w],) {
          $arg =~ s,^\s+(\w+),$1,;
        }
         history_print($arg,\%commands);
      }
    } 
    #######
    # XYZ #
    #######
    if (!($commands->{"ftp"} || $commands->{"purge"})) {
     if (!$commands->{"y"}) {
      if (!$commands->{"nz"}) {
       !($commands->{"r"} || $commands{"remove"}) ?
         system "$apt_get install $arg" :
         system "$apt_get remove $arg";
      }
      else {
       !($commands->{"r"} || $commands{"remove"}) ?
         system "$apt_get -d install $arg" :
         system "$apt_get  remove $arg";
      } 
     }
     else {
      if (!$commands->{"nz"}) {
       !($commands->{"r"} || $commands{"remove"}) ?
         system "$apt_get install -y $arg" :
         system "$apt_get remove -y $arg";
      }
      else {
       # not that the y does anything
       !($commands->{"r"} || $commands{"remove"}) ?
         system "$apt_get install -y -d $arg" :
         system "$apt_get remove -y $arg";
      }
     }
    }
    #######
    # FTP #
    #######
    elsif ($commands->{"ftp"}) {
      require SWIM::Qftp;
      SWIM::Qftp->import(qw(qftp));
      qftp($arg,\%commands);
    }
  
    ##################
    # PURGE & REMOVE #
    ##################
    elsif ($commands->{"purge"} || $commands->{"remove"} || $commands->{"r"}) {        
      purge($arg,\%commands);
    }

    # this is a good time to return the versions, too, as well as
    # including any NEW packages from --db and --ndb.  We'll assume $arg
    # from qftp will never be too large
    if (!$commands->{"n"}) {
      dbi(\%commands);
      @PACKAGES = map($db{$_},(@PACKAGES = split(/\s/,$arg)));
    }
    else {
      ndb(\%commands);
      @PACKAGES = map($db{$_},(@PACKAGES = split(/\s/,$arg)));
    }
    untie %db;
  } 

} # end sub xyz


# Remove (keep configuration files) or purge everything for each package.
sub purge {

 my ($arg,$commands) = @_;

    if (!$commands->{"n"}) {
     if ($commands->{"purge"}) {
       system "$dpkg --purge $arg";  

     }
     elsif ($commands->{"remove"} || $commands->{"r"}) {
        system "$dpkg -r $arg";  
     }
    }
    else {
      print "swim: ";
      print "-r " if defined $commands->{"r"};
      print "--remove " if defined $commands->{"remove"};
      print "--purge " if defined $commands->{"purge"};
      print "can only be used with installed packages\n";
    }


} # end sub purge


# find the history file and return proper output
sub history {

    my($commands) = @_;
    my %commands = %$commands;

    my($arch,$dist) = which_archdist(\%commands);
    my($place) = finddb(\%commands);
    my $swim_history;
    if ($commands->{"n"}) {
     $swim_history = "$place/.nswim$arch$dist" . "_history";
    }
    else {
     $swim_history = "$place/.swim" . "_history";
    }
    open(HISTORY,"$swim_history") or exit;
    my (@HISTORY,$line);
    while (<HISTORY>) {
     chomp;
     foreach (split(/\s/,$_)) {
       if (!defined $line) {
         $line =  (split(/_/,$_))[0];
       }
       else {
         $line = $line . " " . (split(/_/,$_))[0];
       }
     }
      push(@HISTORY,$line); undef $line;
    }

    return @HISTORY;
 
} # end sub history

# append history if it has changed
sub history_print {

    my($arg,$commands) = @_;
    my %commands = %$commands;
    my($arch,$dist) = which_archdist(\%commands);
    my($place) = finddb(\%commands);
    my $swim_history;
    if ($commands->{"n"}) {
     $swim_history = "$place/.nswim$arch$dist" . "_history";
    }
    else {
     $swim_history = "$place/.swim" . "_history";
    }
   open(HISTORY,"$swim_history") or exit;
   my @HISTORY = <HISTORY>;
   close(HISTORY);
   if ($#HISTORY < $HISTORY - 1) {
     push(@HISTORY,"$arg\n");
   }
   else {
    shift(@HISTORY);
    push(@HISTORY,"$arg\n");
   } 
    open(HISTORY,">$swim_history") or exit;
    print HISTORY @HISTORY;

 
} # end sub history_print

1;