use 5.006;
use ExtUtils::MakeMaker;
use File::Spec;
use strict;
use warnings;
use Config;
use vars qw/$os $osmakefile $osmaketarget $osobjext @winobjs $windllcmd $winsys/;

my $unzip = "unzip-5.52";

if ( $^O =~ /^MSWin/i ) {
    $winsys = ($Config::Config{cc} eq 'cl') ? 'vc' : 'mingw';
    
    my $obprefix = 'res/unzip-5.52';
    
    if( $winsys eq 'vc' ) {
        @winobjs = qw (api crci386l crctabl cryptl explodel extractl fileiol globalsl inflatel listl matchl ntl
                   processl unreducl unshrnkl win32l windll zipinfol);
        $windllcmd = 'nmake -f win32/Makefile dll';
    } else {
        @winobjs = qw (api crc32l crc_i386 crctabl cryptl explodel extractl fileiol globalsl inflatel listl matchl ntl
                   processl unreducl unshrnkl win32l windll zipinfol);
        $windllcmd = 'mingw32-make -f win32/makefile.gcc dll';
    }
    
    my $oext = $Config::Config{obj_ext};
    
    my $objects = 'Burst' . $oext;
    
    $objects .= qq( $obprefix/$_$oext) for (@winobjs);
    
    
    WriteMakefile(
        NAME              => 'Archive::Unzip::Burst',
        VERSION_FROM      => 'lib/Archive/Unzip/Burst.pm', # finds $VERSION
        PREREQ_PM         => {
            'File::Spec' => '0',
            'Cwd' => '0',
          }, # e.g., Module::Name => 1.1
        ($] >= 5.005 ?     ## Add these new keywords supported since 5.005
          (ABSTRACT_FROM  => 'lib/Archive/Unzip/Burst.pm', # retrieve abstract from module
           AUTHOR         => 'Steffen Mueller <smueller@cpan.org>') : ()),
        LDFROM            => $objects,
        INC               => '-I.', # e.g., '-I. -I/usr/include/other'
        LICENSE           => 'perl',
    
    );
    
} # end if win32
else {
  my @OS = qw(
    win32 os2 dos macos linux
  );
  my %OS = (
    win32 => [qr/mswin32/i, 'win32', 'Makefile.gcc', 'dll lib',       '',     0],
    linux => [qr/linux/i,   'unix',  'Makefile',     'generic_shlib', '.pic', 1],
    os2 =>   [qr/os2/i,     'os2',   'makefile.os2', 'gcc gccdyn',    '',     0],
    dos =>   [qr/dos/i,     'msdos', 'makefile.msc', 'default',       '',     0],
    macos => [qr/macos/i,   'unix',  'Makefile',     'generic_shlib', '.pic', 0],
  );

  foreach (@OS) {
    my $desc = $OS{$_};
    my $regex = $desc->[0];
    if ($^O =~ $regex) {
      $os = $desc->[1];
      $osmakefile   = $desc->[2];
      $osmaketarget = $desc->[3]||'generic_shlib';
      $osobjext     = $desc->[4];
      if (not $desc->[5]) {
        warn "BEWARE! The module has not been tested on this OS!\n"
            ."It turns out its working, please inform the maintainer so he can\n"
            ."remove this notice. Thank you! (Patches welcome, too.)\n";
      }
      last;
    }
  }

  if (not defined $os) {
    warn "Could not determine that you are running any supported\n"
        ."Operating System. I will try the generic 'unix' Makefile.\n";
    my $osdesc = $OS{linux};
    $os = $osdesc->[1];
    $osmakefile = $osdesc->[2];
    $osmaketarget = $osdesc->[3];
  }

  WriteMakefile(
      NAME              => 'Archive::Unzip::Burst',
      VERSION_FROM      => 'lib/Archive/Unzip/Burst.pm', # finds $VERSION
      PREREQ_PM         => {
          'File::Spec' => '0',
          'Cwd' => '0',
        }, # e.g., Module::Name => 1.1
      ($] >= 5.005 ?     ## Add these new keywords supported since 5.005
        (ABSTRACT_FROM  => 'lib/Archive/Unzip/Burst.pm', # retrieve abstract from module
         AUTHOR         => 'Steffen Mueller <smueller@cpan.org>') : ()),
      LIBS              => [''], # e.g., '-lm'
      DEFINE            => '-fPIC -DDLL -O3', # e.g., '-DHAVE_SOMETHING'
      INC               => '-I.', # e.g., '-I. -I/usr/include/other'
      MYEXTLIB => 'res/libmyunzip$(LIB_EXT)',
      LICENSE           => 'perl',
  );

} # end if not win32


sub MY::postamble {
  return "" if $^O =~ /^MSWin/i;
  require File::Copy;
  require File::Spec;
  require Cwd;
  
  my $unzip_dir = File::Spec->catdir("res", $unzip);
  my $use_makefile    = File::Spec->catfile($unzip_dir, $os, $osmakefile);
  my $makefile_target = File::Spec->catfile($unzip_dir, "Makefile");
  File::Copy::copy( $use_makefile, $makefile_target );
  my $abs_unzip_dir = Cwd::abs_path($unzip_dir);
"
\$(MYEXTLIB): $makefile_target
	cd $unzip_dir && LD_LIBRARY_PATH=$abs_unzip_dir \$(MAKE) $osmaketarget \$(PASSTHRU)
"
}