use strict;

use warnings;

use Cwd 'abs_path';

use ExtUtils::MakeMaker;

use File::Basename;

require 5;

use Config;

use MakefileSubs;

my $lib_version;

# See lib/ExtUtils/MakeMaker.pm for details of how to influence

# the contents of the Makefile that is written.

WriteMakefile(AsnInitMakeParams());

Check_Version($lib_version);

sub AsnInitMakeParams {

    my $opts;

    my %Params = (

		  'NAME'		=> 'NetSNMP::ASN',

		  'VERSION_FROM'	=> 'ASN.pm', # finds $VERSION

		  'XSPROTOARG'          => '-prototypes',

		  'PREREQ_PM'           => {},

		  );

    if ($ENV{'OSTYPE'} eq 'msys') {

      $Params{'DEFINE'} = "-DMINGW_PERL";

    }

    my ($snmp_lib, $snmp_llib, $sep);

    if (($Config{'osname'} eq 'MSWin32' && $ENV{'OSTYPE'} eq '')) {

      $opts = NetSNMPGetOpts();	

      $Params{'DEFINE'} = "-DMSVC_PERL -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS";

      $sep = '\\';

      my $snmp_lib_file = 'netsnmp.lib';

      my $snmp_link_lib = 'netsnmp';

      my $lib_dir;

      if (lc($opts->{'debug'}) eq "true") {

        $lib_dir = 'lib\\debug';

      }

      else {

        $lib_dir = 'lib\\release';

      }

      if (lc($opts->{'insource'}) eq "true") {

	$Params{'LIBS'} = "-L" . $MakefileSubs::basedir . "\\win32\\$lib_dir\\ -l$snmp_link_lib";

      }

      else {

	my @LibDirs = split (';',$ENV{LIB});

        my $LibDir;

	if ($opts->{'prefix'}) {

	  push (@LibDirs,"$ENV{'NET-SNMP-PATH'}${sep}lib");

	}

	my $noLibDir = 1;

	while ($noLibDir) {

	  $LibDir = find_files(["$snmp_lib_file"],\@LibDirs);

	  if ($LibDir ne '') {

	    $noLibDir = 0;

            # Put quotes around LibDir to allow spaces in paths

            $LibDir = '"' . $LibDir . '"';

	  }

	  else

	  {

	    @LibDirs = ();

	    $LibDirs[0] = prompt("The Net-SNMP library ($snmp_lib_file) could not be found.\nPlease enter the directory where it is located:");

	    $LibDirs[0] =~ s/\\$//;

	  }

	}

	$Params{LIBS} = "-L$LibDir -l$snmp_link_lib";

      }

      $Params{'INC'} = "-I" . $MakefileSubs::basedir . "\\include\\ -I" . $MakefileSubs::basedir . "\\include\\net-snmp\\ -I" . $MakefileSubs::basedir . "\\win32\\ ";

    }

    else

    {

      $opts = NetSNMPGetOpts();

      $Params{'LDDLFLAGS'} = "$Config{lddlflags} " . `$opts->{'nsconfig'} --ldflags`;

      $Params{'LIBS'}    = `$opts->{'nsconfig'} --libs`;

      chomp($Params{'LIBS'});

      $Params{'CCFLAGS'} = `$opts->{'nsconfig'} --cflags`;

      chomp($Params{'CCFLAGS'});

      $Params{'CCFLAGS'} .= " " . $Config{'ccflags'};

      $lib_version = `$opts->{'nsconfig'} --version`;

      if (lc($opts->{'insource'}) eq "true") {

	$Params{'LIBS'} =

            "-L" . abs_path("../../snmplib/.libs") .

            " -L" . abs_path("../../snmplib") .

            " " . $Params{'LIBS'};

	$Params{'CCFLAGS'} = "-I../../include " . $Params{'CCFLAGS'};

      }

      $Params{'CCFLAGS'} =~ s/ -W(inline|strict-prototypes|write-strings|cast-qual|no-char-subscripts)//g; # ignore developer warnings

      $Params{'CCFLAGS'} .= ' -Wformat';

      if ($Params{'LIBS'} eq "" || $Params{'CCFLAGS'} eq "") {

	die "You need to install net-snmp first (I can't find net-snmp-config)";

      }

    }

    return (%Params);

}