#!/usr/bin/perl
# --
# Copyright (C) 2001-2016 OTRS AG, http://otrs.com/
# --
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU AFFERO General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# 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 Affero General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# or see http://www.gnu.org/licenses/agpl.txt.
# --

use strict;
use warnings;

use File::Basename;
use FindBin qw($RealBin);
use lib dirname($RealBin);
use lib dirname($RealBin) . '/Kernel/cpan-lib';
use lib dirname($RealBin) . '/Custom';

# on Windows, we only have ANSI support if Win32::Console::ANSI is present
# turn off colors if it is not available
BEGIN {
    if ( $^O eq 'MSWin32' ) {
        ## no critic
        eval "use Win32::Console::ANSI";
        ## use critic
        $ENV{nocolors} = 1 if $@;
    }
}

use ExtUtils::MakeMaker;
use File::Path;
use Getopt::Long;
use Term::ANSIColor;

use Kernel::System::Environment;

my $AllModules;
GetOptions( "all" => \$AllModules );

my $Options = shift || '';
my $NoColors;
if ( $ENV{nocolors} || $Options =~ m{\A nocolors}msxi ) {
    $NoColors = 1;
}

# config
my @NeededModules = (
    {
        Module   => 'Archive::Tar',
        Required => 1,
        Comment  => 'Required for compressed file generation.',
    },
    {
        Module   => 'Crypt::Eksblowfish::Bcrypt',
        Required => 0,
        Comment  => 'For strong password hashing.',
    },
    {
        Module   => 'Crypt::SSLeay',
        Required => 0,
        Comment  => 'Required for Generic Interface SOAP SSL connections.',
    },
    {
        Module   => 'Date::Format',
        Required => 1,
    },
    {
        Module   => 'DBI',
        Required => 1,
    },
    {
        Module   => 'DBD::mysql',
        Required => 0,
        Comment  => 'Required to connect to a MySQL database.',
    },
    {
        Module       => 'DBD::ODBC',
        Required     => 0,
        NotSupported => [
            {
                Version => '1.23',
                Comment =>
                    'This version is broken and not useable! Please upgrade to a higher version.',
            },
        ],
        Comment => 'Required to connect to a MS-SQL database.',
    },
    {
        Module   => 'DBD::Oracle',
        Required => 0,
        Comment  => 'Required to connect to a Oracle database.',
    },
    {
        Module   => 'DBD::Pg',
        Required => 0,
        Comment  => 'Required to connect to a PostgreSQL database.',
    },
    {
        Module   => 'Encode::HanExtra',
        Version  => '0.23',
        Required => 0,
        Comment  => 'Required to handle mails with several Chinese character sets.',
    },
    {
        Module   => 'GD',
        Required => 0,
        Comment  => 'Required for stats.',
        Depends  => [
            {
                Module   => 'GD::Text',
                Required => 0,
                Comment  => 'Required for stats.',
            },
            {
                Module   => 'GD::Graph',
                Required => 0,
                Comment  => 'Required for stats.',
            },
        ],
    },
    {
        Module   => 'IO::Socket::SSL',
        Required => 0,
        Comment  => 'Required for SSL connections to web and mail servers.',
    },
    {
        Module   => 'JSON::XS',
        Required => 0,
        Comment  => 'Recommended for faster AJAX/JavaScript handling.',
    },
    {
        Module   => 'List::Util::XS',
        Required => 1,
        Comment =>
            "Do a 'force install Scalar::Util' via cpan shell to fix this problem. Please make sure to have an c compiler and make installed before.",
    },
    {
        Module   => 'LWP::UserAgent',
        Required => 1,
    },
    {
        Module   => 'Mail::IMAPClient',
        Version  => '3.22',
        Comment  => 'Required for IMAP TLS connections.',
        Required => 0,
        Depends  => [
            {
                Module   => 'IO::Socket::SSL',
                Required => 0,
                Comment  => 'Required for IMAP TLS connections.',
            },
        ],
    },
    {
        Module   => 'ModPerl::Util',
        Required => 0,
        Comment  => 'Improves Performance on Apache webservers dramatically.',
    },
    {
        Module       => 'Net::DNS',
        Required     => 1,
        NotSupported => [
            {
                Version => '0.60',
                Comment =>
                    'This version is broken and not useable! Please upgrade to a higher version.',
            },
        ],
    },
    {
        Module   => 'Net::LDAP',
        Required => 0,
        Comment  => 'Required for directory authentication.',
    },
    {
        Module       => 'PDF::API2',
        Version      => '0.57',
        Required     => 0,
        Comment      => 'Required for PDF output.',
        NotSupported => [
            {
                Version => '0.71.001',
                Comment =>
                    'This version is broken and not useable! Please upgrade to a higher version.',
            },
            {
                Version => '0.72.001',
                Comment =>
                    'This version is broken and not useable! Please upgrade to a higher version.',
            },
            {
                Version => '0.72.002',
                Comment =>
                    'This version is broken and not useable! Please upgrade to a higher version.',
            },
            {
                Version => '0.72.003',
                Comment =>
                    'This version is broken and not useable! Please upgrade to a higher version.',
            },
        ],
        Depends => [
            {
                Module   => 'Compress::Zlib',
                Required => 0,
                Comment  => 'Required for PDF output.',
            },
        ],
    },
    {
        Module   => 'Text::CSV_XS',
        Required => 0,
        Comment  => 'Recommended for faster CSV handling.',
    },
    {
        Module   => 'Time::HiRes',
        Required => 1,
        Comment  => 'Required for high resolution timestamps.',
    },
    {
        # perlcore
        Module   => 'Time::Piece',
        Required => 1,
        Comment  => 'Required for statistics.',
    },
    {
        Module   => 'XML::Parser',
        Required => 0,
        Comment  => 'Recommended for faster xml handling.',
    },
    {
        Module   => 'YAML::XS',
        Required => 1,
    },
);

# if we're on Windows we need some additional modules
if ( $^O eq "MSWin32" ) {
    my @WindowsModules = (
        {
            Module   => 'Win32::Daemon',
            Required => 1,
            Comment  => 'For running the OTRS Scheduler Service.',
        },
        {
            Module   => 'Win32::Service',
            Required => 1,
            Comment  => 'For running the OTRS Scheduler Service.',
        },
    );
    push @NeededModules, @WindowsModules;
}

# try to determine module version number
my $Depends = 0;
for my $Module (@NeededModules) {
    _Check( $Module, $Depends, $NoColors );
}

if ($AllModules) {
    print "\nBundled modules:\n\n";

    my %PerlInfo = Kernel::System::Environment->PerlInfoGet(
        BundledModules => 1,
    );
    for my $Module ( sort keys %{ $PerlInfo{Modules} } ) {
        _Check(
            {
                Module   => $Module,
                Required => 1,
            },
            $Depends,
            $NoColors
        );
    }
}

exit;

sub _Check {
    my ( $Module, $Depends, $NoColors ) = @_;

    # if we're on Windows we don't need to see Apache + mod_perl modules
    if ( $^O eq "MSWin32" ) {
        return if $Module->{Module} =~ m{\A Apache }xms;
        return if $Module->{Module} =~ m{\A ModPerl }xms;
    }

    print "  " x ( $Depends + 1 );
    print "o $Module->{Module}";
    my $Length = 33 - ( length( $Module->{Module} ) + ( $Depends * 2 ) );
    print '.' x $Length;

    my $Version = Kernel::System::Environment->ModuleVersionGet( Module => $Module->{Module} );
    if ($Version) {

        # cleanup version number
        my $CleanedVersion = _VersionClean(
            Version => $Version,
        );

        my $ErrorMessage;

        # Test if all module dependencies are installed by requiring the module.
        #   Don't do this for Net::DNS as it seems to take very long (>20s) in a
        #   mod_perl environment sometimes.
        my %DontRequire = (
            'Net::DNS'     => 1,
            'Email::Valid' => 1,    # uses Net::DNS internally
        );

        ## no critic
        if ( !$DontRequire{ $Module->{Module} } && !eval "require $Module->{Module}" ) {
            $ErrorMessage .= 'Not all prerequisites for this module correctly installed. ';
        }
        ## use critic

        if ( $Module->{NotSupported} ) {

            my $NotSupported = 0;
            ITEM:
            for my $Item ( @{ $Module->{NotSupported} } ) {

                # cleanup item version number
                my $ItemVersion = _VersionClean(
                    Version => $Item->{Version},
                );

                if ( $CleanedVersion == $ItemVersion ) {
                    $NotSupported = $Item->{Comment};
                    last ITEM;
                }
            }

            if ($NotSupported) {
                $ErrorMessage .= "Version $Version not supported! $NotSupported ";
            }
        }

        if ( $Module->{Version} ) {

            # cleanup item version number
            my $RequiredModuleVersion = _VersionClean(
                Version => $Module->{Version},
            );

            if ( $CleanedVersion < $RequiredModuleVersion ) {
                $ErrorMessage
                    .= "Version $Version installed but $Module->{Version} or higher is required! ";
            }
        }

        if ($ErrorMessage) {
            if ($NoColors) {
                print "FAILED! $ErrorMessage\n";
            }
            else {
                print color('red') . "FAILED!" . color('reset') . " $ErrorMessage\n";
            }
        }
        else {
            if ($NoColors) {
                print "ok (v$Version)\n";
            }
            else {
                print color('green') . "ok" . color('reset') . " (v$Version)\n";
            }
        }
    }
    else {
        my $Comment  = $Module->{Comment} || '';
        my $Required = $Module->{Required};
        my $Color    = 'yellow';
        if ($Required) {
            $Required = 'required - Please install this module';
            $Color    = 'red';
        }
        else {
            $Required = 'optional';
        }
        if ($NoColors) {
            print "Not installed! ($Required - $Comment)\n";
        }
        else {
            print color($Color) . "Not installed!" . color('reset') . " ($Required - $Comment)\n";
        }
    }

    if ( $Module->{Depends} ) {
        for my $ModuleSub ( @{ $Module->{Depends} } ) {
            _Check( $ModuleSub, $Depends + 1, $NoColors );
        }
    }

    return 1;
}

sub _VersionClean {
    my (%Param) = @_;

    return 0 if !$Param{Version};

    # replace all special characters with an dot
    $Param{Version} =~ s{ [_-] }{.}xmsg;

    my @VersionParts = split q{\.}, $Param{Version};

    my $CleanedVersion = '';
    for my $Count ( 0 .. 4 ) {
        $VersionParts[$Count] ||= 0;
        $CleanedVersion .= sprintf "%04d", $VersionParts[$Count];
    }

    return int $CleanedVersion;
}

exit 0;
