package  # hide from PAUSE
   P9Y::ProcessTable;

our $VERSION = '0.90'; # VERSION
# ABSTRACT: Win32 process table

#############################################################################
# Modules

use sanity;
use Moo;
use P9Y::ProcessTable::Process;

use Win32::Process;
use Win32::Process::Info;

use namespace::clean;
no warnings 'uninitialized';

my $pi = Win32::Process::Info->new();

#############################################################################
# Methods

no warnings 'redefine';

sub list {
   my $self = shift;
   return sort { $a <=> $b } ($pi->ListPids);
}

sub process {
   my ($self, $pid) = @_;
   $pid = Win32::Process::GetCurrentProcessID if (@_ == 1);  # changed here...
   my $hash = $self->_process_hash($pid);
   return unless $hash;
   
   $hash->{_pt_obj} = $self;
   return P9Y::ProcessTable::Process->new($hash);
}

sub _process_hash {
   my ($self, $pid) = @_;
   my $info = $pi->GetProcInfo($pid);
   return unless $info;
   $info = $info->[0];

   my $hash = {};
   state $stat_loc = { qw/
      pid        ProcessId
      uid        Owner
      ppid       ParentProcessId
      sess       SessionId
      exe        ExecutablePath
      threads    ThreadCount
      priority   Priority
      ttlflt     PageFaults
      utime      UserModeTime
      stime      KernelModeTime
      size       VirtualSize
      rss        WorkingSetSize
      fname      Caption
      start      CreationDate
      state      Status
      cmdline    CommandLine
   / };

   foreach my $key (keys %$stat_loc) {
      my $item = $info->{ $stat_loc->{$key} };
      $hash->{$key} = $item if defined $item;
   }

   $hash->{exe}  =~ /^(\w\:\\)/;
   $hash->{root} = $1;
   $hash->{time} = $hash->{utime} + $hash->{stime};

   return $hash;
}

#############################################################################
# Process side

### FIXME: Can't get Win32::API to not crash on me... ###

package  # hide from PAUSE
   P9Y::ProcessTable::Process;

use Win32::Process;
#use Win32::API;
#use Win32::API::Callback;

BEGIN {
   #Win32::API->Import( 'user32', 'EnumWindows',              'KN', 'N' );
   #Win32::API->Import( 'user32', 'GetWindowThreadProcessId', 'NP', 'N' );
   #Win32::API->Import( 'user32', 'PostMessage',              'NINN', 'N' );
}

no warnings 'redefine';

sub _win32_proc {
   my $self = shift;
   my $obj;
   Win32::Process::Open($obj, $self->pid, 0);
   return $obj;
}

sub kill {
   my ($self, $sig) = @_;

   # Windows's signal.h actually has plenty of gaps, but it still follows Linux's model where
   # there isn't gaps.  Thus, we'll just fill in the blanks.

   # POSIX = 0 HUP INT QUIT ILL TRAP ABRT . FPE KILL . SEGV . PIPE ALRM TERM . . . . . . ABRT
   # 0x0010 = WM_CLOSE
   state $posix2wm = [
      0, 0x0010, 0x0010, qw/kill kill kill kill . kill kill . kill ./, 0x0010, 0x0010, 0x0010, qw/. . . . . . kill/
   ];

   $sig = $posix2wm->[$sig];
   return if (!$sig || $sig eq '.');
   if    ($sig eq '0') {
      return CORE::kill($sig, $self->pid);
   }
   elsif ($sig eq 'kill') {
      return $self->_win32_proc->Kill(255);
   }
   else {
      #my $cb = Win32::API::Callback->new( sub {
      #   my $hwnd = shift;
      #   my $pid = 0;
      #
      #   #GetWindowThreadProcessId($hwnd, \$pid);
      #   print "foo\n";
      #   #PostMessage($hwnd, $sig) if ($$pid && $$pid == $self->pid);
      #}, "NN", "N" );
      #
      #my $ret = EnumWindows($cb, 0);
      return $self->_win32_proc->Kill(255);
   }
}

sub priority {
   my ($self, $pri) = @_;
   return $self->{priority} if @_ == 1;
   
   $self->_win32_proc->SetPriorityClass($pri);
   $self->_set_priority($pri);
}

42;

__END__
=pod

=encoding utf-8

=head1 NAME

P9Y::ProcessTable - Win32 process table

=head1 AVAILABILITY

The project homepage is L<https://github.com/SineSwiper/P9Y-ProcessTable/wiki>.

The latest version of this module is available from the Comprehensive Perl
Archive Network (CPAN). Visit L<http://www.perl.com/CPAN/> to find a CPAN
site near you, or see L<https://metacpan.org/module/P9Y::ProcessTable/>.

=head1 AUTHOR

Brendan Byrd <BBYRD@CPAN.org>

=head1 COPYRIGHT AND LICENSE

This software is Copyright (c) 2012 by Brendan Byrd.

This is free software, licensed under:

  The Artistic License 2.0 (GPL Compatible)

=cut