#!/usr/bin/perl -w

use strict;

use lib 'lib';

use File::Path;
use UNIVERSAL::require;
use FusionInventory::Agent::Config;


# DEB/RPM/... maintainers, turn this to '1'
my $packaged = 0;

my $config;
my @cacert;
my $randomtime;
my $cron_line;

sub loadModules {
    my @modules = @_;

    foreach my $module (@modules) {
        $module->require();
        $module->import();
        if ($@) {
            print STDERR "Failed to load '$module': $@. Please install it and ".
            "restart the fusioninventory-agent-config script.\n";
            exit 1;

        }
    }

}

sub ask_yn {
    my $promptUser = shift;
    my $default = shift;

    die unless $default =~ /^(y|n)$/;

    my $cpt = 5;
    while (1) {
        my $line = prompt("$promptUser\nPlease enter 'y' or 'n'?>", $default);
        return 1 if $line =~ /^y$/;
        return if $line =~ /^n$/;
        if ($cpt-- < 0) {
            print STDERR "to much user input, exit...\n";
            exit(0);
        }
    }
}

sub promptUser {
    my ($promptUser, $default, $regex, $notice) = @_;

    my $string = $promptUser;
    $string .= "?>";

    my $line;
    my $cpt = 5;
    while (1) {

        $line = prompt($string, $default);

        if ($regex && $line !~ /$regex/) {
            print STDERR $notice."\n";
        } else {
            last;
        }

        if ($cpt-- < 0) {
            print STDERR "to much user input, exit...\n";
            exit(0);
        }

    }

    return $line;
}

sub pickConfigdir {
    my ($args) = @_;

    my $dirs = $args->{dirs};
    my $files = $args->{files};


    foreach my $dir (@$dirs) {
        foreach my $file (@$files) {
            my $t = $dir.'/'.$file;
            if (-f $t) {
                return $dir."/".$file; 
            }
        }
    }
}

sub mkFullServerUrl {

    my $server = shift;

    my $ret = 'http://' unless $server =~ /^http(s|):\/\//;
    $ret .= $server;

    if ($server !~ /http(|s):\/\/\S+\/\S+/) {
        $ret .= '/ocsinventory';
    }

    return $ret;

}


####################################################
################### main ###########################
####################################################

loadModules (qw/XML::Simple ExtUtils::MakeMaker/);

if (!ask_yn("Do you want to configure the agent", 'y')) {
    exit 0;
}

my $defaultConfigDir = "/etc/fusioninventory";
my $defaultCfgFile = "agent.cfg";
my $newConfigFile = pickConfigdir ({
        dirs => [ 
        $defaultConfigDir,
        "/usr/local/etc/fusioninventory"
        ],
        files => [$defaultCfgFile]
    });
my $ocsConfigFile = pickConfigdir ({
        dirs => [ 
        "/etc/ocsinventory",
        "/usr/local/etc/ocsinventory",
        "/etc/ocsinventory-agent"
        ],
        files => ['ocsinventory-agent.cfg']
    });
my $oldOcsConfigdir = "/etc/ocsinventory-client";

if (!-d $defaultConfigDir) { 
    if (ask_yn ("Do you want to create the directory ".
            $defaultConfigDir."?", 'y')) {
        if (!mkdir $defaultConfigDir) {
            print "Failed to create ".$defaultConfigDir.". Are you root?\n";
            exit 1;
        }
    } else {
        print "Please create the ".$defaultConfigDir." directory first.\n";
        exit 1;
    }
}




if (-f $oldOcsConfigdir.'/ocsinv.conf' && ask_yn("Should the old linux_agent settings be imported?", 'y')) {
    my $ocsinv = XMLin($oldOcsConfigdir.'/ocsinv.conf');
    $config->{server} = mkFullServerUrl($ocsinv->{'OCSFSERVER'});

    if (-f $oldOcsConfigdir.'/cacert.pem') {
        open CACERT, $oldOcsConfigdir.'/cacert.pem' or die "Can'i import the CA certificat: ".$!;
        @cacert = <CACERT>;
        close CACERT;
    }

    my $admcontent = '';


    if (-f "$oldOcsConfigdir/ocsinv.adm") {
        if (!open(ADM, "<:encoding(iso-8859-1)", "$oldOcsConfigdir/ocsinv.adm")) {
            warn "Can't open $oldOcsConfigdir/ocsinv.adm";
        } else {
            $admcontent .= $_ foreach (<ADM>);
            close ADM;
            my $admdata = XMLin($admcontent) or die;
            if (ref ($admdata->{ACCOUNTINFO}) eq 'ARRAY') {
                foreach (@{$admdata->{ACCOUNTINFO}}) {
                    $config->{tag} = $_->{KEYVALUE} if $_->{KEYNAME} =~ /^TAG$/;
                }
            } elsif (
                exists($admdata->{ACCOUNTINFO}->{KEYNAME}) &&
                exists($admdata->{ACCOUNTINFO}->{KEYVALUE}) &&
                $admdata->{ACCOUNTINFO}->{KEYNAME} eq 'TAG'
            ) {
                print $admdata->{ACCOUNTINFO}->{KEYVALUE}."\n";
                $config->{tag} = $admdata->{ACCOUNTINFO}->{KEYVALUE};
            }
        }
    }
}

foreach ($newConfigFile, $ocsConfigFile) {
    if (-f $_) {
        open (CONFIG, "<".$_) or
        die "Can't open ".$_.": ".$!;
        print "Load settings from $_\n";

        foreach (<CONFIG>) {
            s/#.+//;
            if (/(\w+)\s*=\s*(.+)/) {
                my $key = $1;
                my $val = $2;
                # Remove the quotes
                $val =~ s/\s+$//;
                $val =~ s/^'(.*)'$/$1/;
                $val =~ s/^"(.*)"$/$1/;
                $config->{$key} = $val;
            }
        }
        close CONFIG;
        last;
    }
}

print "[info] The config file will be written in $defaultConfigDir/$defaultCfgFile,\n";

my $tmp = promptUser('What are the address of your inventory servers? You can enter a list of multiple servers separated by a comma (,).', exists
    ($config->{server})?$config->{server}:'http://ocsinventory-ng/ocsinventory');
$config->{server} = mkFullServerUrl($tmp);
if (!$config->{server}) {
    print "Server is empty. Leaving...\n";
    exit 1;
}

if (ask_yn ("Do you need credential for the server? (You probably don't)", 'n')) {
    $config->{user} = promptUser("user", $config->{user});
    $config->{password} = promptUser("password");
    print "[info] The realm can be found in the login popup of your Internet browser.\n[info] In general, it's something like 'Restricted Area'.\n";
    $config->{realm} = promptUser("realm");
} else {
    delete ($config->{user});
    delete ($config->{password});
    delete ($config->{realm});
}

if (ask_yn('Do you want to apply an administrative tag on this machine', 'y')) {

    $config->{tag} = promptUser("tag", $config->{tag});
} else {
    delete($config->{tag});
}


chomp(my $binpath = `which fusioninventory-agent 2>/dev/null`);
print $binpath."\n";
if (! -x $binpath) {
    # Packaged version with perl and agent ?
    $binpath = $^X;
    $binpath =~ s/perl/fusioninventory-agent/;
}
if (! -x $binpath) {
    print "sorry, can't find fusioninventory-agent in \$PATH\n";
    exit 1;
} else {
    print "FusionInventory Agent found: $binpath\n";
}


if (!$packaged) {
    $randomtime = int(rand(60)).' '.int(rand(24));
    $cron_line = $randomtime." * * * root $binpath --lazy > /dev/null 2>&1\n";

    if ($^O =~ /solaris/) {
        if (ask_yn("Do yo want to install the cron task in current user crontab ?", 'y')) {
            my $crontab = `crontab -l`;

            # Let's suppress Linux cron/anacron user column
            $cron_line =~ s/ root /  /;
            $crontab .= $cron_line;

            open CRONP, "| crontab" || die "Can't run crontab: $!";
            print CRONP $crontab;
            close(CRONP);

        }
    }
    elsif (-d "/etc/cron.d") {
        if (ask_yn("Do yo want to install the cron task in /etc/cron.d", 'y')) {

            open DEST, '>/etc/cron.d/fusioninventory-agent' or die $!;
            # Save the root PATH
            print DEST "PATH=".$ENV{PATH}."\n";
            print DEST $randomtime." * * * root $binpath --lazy > /dev/null 2>&1\n";
            close DEST;
        }
    }

    my $old_vardir;
    my $default_vardir = $config->{basevardir};
    if ($^O =~ /solaris/) {
        $default_vardir = '/var/opt/fusioninventory-agent';
        $old_vardir = '/var/opt/ocsinventory-agent';

    } else { 
        $default_vardir = '/var/lib/fusioninventory-agent';
        $old_vardir = '/var/lib/ocsinventory-agent';
    }




    $config->{basevardir} = promptUser('Where do you want the agent to store its files? (You probably don\'t need to change it)', exists ($config->{basevardir})?$config->{basevardir}:$default_vardir, '^\/\w+', 'The location must begin with /');

    if (!-d $config->{basevardir}) {
        if (ask_yn ("Do you want to create the ".$config->{basevardir}." directory?\n", 'y')) {
            mkdir $config->{basevardir} or die $!;
        } else {
            print "Please create the ".$config->{basevardir}." directory\n";
            exit 1;
        }
    }

    if (-d  $config->{basevardir} && !-d $default_vardir && ask_yn("Do yo want to ".
            "migration  $old_vardir for FusionInventory Agent", 'y')) {
        system('mv', $old_vardir, $default_vardir);
    }

    my @oldFiles = qw(
    /etc/ocsinventory-client
    /etc/logrotate.d/ocsinventory-agent
    /etc/logrotate.d/ocsinventory-client
    /usr/sbin/ocsinventory-agent
    /usr/bin/ocsinventory-agent
    /usr/sbin/ocsinventory-client.pl
    /etc/cron.d/ocsinventory-client
    /bin/ocsinv);

    my $doCleanUp;
    foreach (@oldFiles) {
        if (-f||-d||-l) {
            $doCleanUp=1;
            last;
        }
    }
    if ($doCleanUp && ask_yn ("Should I remove the Ocsinventory Agent files", 'n')) {
        foreach (@oldFiles) {
            next unless -f;
            print $_."\n";
            rmdir if -d;
            unlink if -f || -l;
        }
        print "done\n"
    }

# Create the vardirectory for this server
    my $dir = $config->{server};
    $dir =~ s/\//_/g;
    $dir =~ s/:/../g if $^O =~ /^MSWin/; # Conditional because there is
    my $vardir = $config->{basevardir}."/".$dir;
    if (!-d $vardir && !mkpath($vardir)) {
        die "Can't create $vardir!";
    }

    if (@cacert) { # we need to migrate the certificat
        open CACERT, ">".$vardir."/cacert.pem" or die "Can't open ".$vardir.'/cacert.pem: '.$!;
        print CACERT foreach (@cacert);
        close CACERT;
        print "Certificat copied in ".$vardir."/cacert.pem\n";
    }



}

open CONFIG, ">$defaultConfigDir/$defaultCfgFile" or die "Can't write the config file in $defaultConfigDir/$defaultCfgFile: ".$!;
print CONFIG $_."=".$config->{$_}."\n" foreach (keys %$config);
close CONFIG;
chmod 0600, "$defaultConfigDir/$defaultCfgFile";

if (ask_yn("Do you want to send an inventory of this machine?", 'y')) {
    system("$binpath --force");
}

print  "################################\n";
print "New settings written! Thank you for using FusionInventory!\n";
print "  http://www.FusionInventory.org\n";

__END__

=head1 NAME

fusioninventory-agent-config - FusionInventory Agent configuration script 

=head1 SYNOPSIS

B<fusioninventory-agent-config>