#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - scripts/swapip                          Copyright 2022 cPanel, L.L.C.
#                                                           All rights reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

package scripts::swapip;

#

use strict;
use warnings;

use Cpanel::BinCheck::Lite     ();
use Cpanel::LoadModule         ();
use Cpanel::JSON               ();
use Cpanel::NAT                ();
use Whostmgr::Transfers::State ();
use Whostmgr::DNS::SwapIP      ();

Cpanel::BinCheck::Lite::check_argv();

## if invoked as a script, there is nothing in the call stack
my $invoked_as_script = !caller();
__PACKAGE__->script(@ARGV) if ($invoked_as_script);

sub script {
    my ( $package, @args ) = @_;

    my ( $sourceip, $targetip, @DOMAINS, $zoneref, $showmsgs, $skipsync, $skipreload, $ftpip, $replaceip );

    my $input_ref;

    if ( @args && $args[0] eq '--json' ) {
        $input_ref = Cpanel::JSON::LoadFileNoSetUTF8( \*STDIN );
    }
    elsif ( @args && $args[0] eq '--storable' ) {
        Cpanel::LoadModule::load_perl_module('Cpanel::SafeStorable');
        $input_ref = Cpanel::SafeStorable::fd_retrieve( \*STDIN );
    }
    elsif ( ref $args[0] ) {
        $input_ref = $args[0];
    }
    else {
        $sourceip = shift(@args);
        $targetip = shift(@args);
        $ftpip    = shift(@args);
        @DOMAINS  = @args;
    }

    if ($input_ref) {
        $sourceip = $input_ref->{'sourceip'};
        $targetip = ( $input_ref->{'destip'} || $input_ref->{'targetip'} );

        @DOMAINS    = @{ $input_ref->{'domainref'} };
        $zoneref    = $input_ref->{'zoneref'};
        $showmsgs   = $input_ref->{'showmsgs'};
        $skipreload = $input_ref->{'skipreload'};
        $skipsync   = $input_ref->{'skipsync'};
        $replaceip  = $input_ref->{'replaceip'};

    }

    if ( ref $sourceip eq 'ARRAY' ) {
        foreach my $ip (@$sourceip) {
            $ip = Cpanel::NAT::get_public_ip($ip);
        }
    }
    else {
        $sourceip = Cpanel::NAT::get_public_ip($sourceip);
    }

    $targetip = Cpanel::NAT::get_public_ip($targetip);
    $ftpip    = Cpanel::NAT::get_public_ip($ftpip);

    if ( !$zoneref || !ref $zoneref ) {
        $zoneref = {};
    }

    if ( !@DOMAINS ) {
        print "At least one domain is required.\n";
        die_usage();
    }

    if ( !$sourceip ) {
        print "Error: sourceip missing\n";
        die_usage();
    }

    if ( !$targetip ) {
        print "Error: targetip missing\n";
        die_usage();
    }

    my $changes = _changezones( \@DOMAINS, $sourceip, $targetip, $ftpip, $zoneref, $showmsgs, $skipreload, $skipsync, $replaceip );

    print "The system updated “$changes” " . ( $changes == 1 ? 'entry' : 'entries' ) . ".\n";

    return 0;
}

sub _changezones {
    my $domainref = shift;
    my $sourceip  = shift;
    ## TODO: rename? why is this called $destip here but $targetip above?
    my $destip     = shift;
    my $ftpip      = shift;
    my $zoneref    = shift;
    my $showmsgs   = shift || 0;
    my $skipreload = shift || 0;
    my $skipsync   = shift || 0;
    my $replaceip  = shift || 'all';

    my $replaced_ar = Whostmgr::DNS::SwapIP::swap_ip_in_zones(
        domainref  => $domainref,
        sourceip   => $sourceip,
        destip     => $destip,
        ftpip      => $ftpip,
        zoneref    => $zoneref,
        showmsgs   => $showmsgs,
        skipreload => $skipreload,
        skipsync   => $skipsync,
        replaceip  => $replaceip,
        dnslocal   => Whostmgr::Transfers::State::is_transfer() ? $Cpanel::DnsUtils::AskDnsAdmin::LOCAL_ONLY : $Cpanel::DnsUtils::AskDnsAdmin::REMOTE_AND_LOCAL,
    );

    return scalar @$replaced_ar;
}

sub die_usage {
    die "Usage: $0 sourceip destip ftpip domains...\n";
}

1;