package zone;
use v5.14;
use Moo;

use Modern::Perl;

# TODO all this file is to redesign

use getiface ':all';
use copycat ':all';
use fileutil ':all';
use configuration ':all';
use Data::Dump qw( dump );

use zonefile;

# primary dns interface 
has dnsi => ( is => 'rw', builder => '_void_arr');

# dns interface for secondary name servers
has dnsisec => ( is => 'rw', builder => '_void');

has [ qw/tld tmpdir domain primarydnsserver secondarydnsserver slavedzones/ ]
=> qw/is ro required 1/;

sub _void { my $x = ''; \$x; }
sub _void_arr { [] }

sub get_ztmp_file_  {my $s = shift; "$$s{tmpdir}/$$s{domain}" }
sub get_ztpl_dir_  {my $s = shift; "$$s{dnsi}{mycfg}{zonedir}" }
sub get_ztpl_file_ {
    my $s = shift;

    # for each TLD
    for(@{$$s{tld}}) {
        # if our domain is part of this TLD, get the right template
        if($$s{domain} =~ $_) {
            return $s->get_ztpl_dir_() . '/' . $_ . '.tpl';
        }
    }

    die "There is no template for $$s{domain}.";
}

sub get_dnsserver_interface {
    my ($self, $dnsserver) = @_;
    my $cfg = {
        mycfg => $dnsserver
        , primarydnsserver => $$self{primarydnsserver}
        , secondarydnsserver => $$self{secondarydnsserver}
        , tmpdir => $$self{tmpdir}
    };

    getiface $$dnsserver{app}, $cfg
}

sub get_dns_server_interfaces {
    my $self = shift;
    my $primary = $$self{primarydnsserver};
    my $s = $$self{secondarydnsserver};

    my $prim = $self->get_dnsserver_interface($primary);

    my @sec;
    for(@{$s}) {
        push @sec, $self->get_dnsserver_interface($_);
    }

    ($prim, [ @sec ])
}

sub BUILD {
    my $self = shift;
    ($$self{dnsi}, $$self{dnsisec}) = $self->get_dns_server_interfaces()
}

# change the origin in a zone file template
sub mod_orig_template {
    my ($file, $domain) = @_;
    say "s/CHANGEMEORIGIN/$domain/ on $file";
    qx[sed -i "s/CHANGEMEORIGIN/$domain/" $file];
}

sub get_remote_zf_ { 
    my $self = shift; 
    "$$self{dnsi}{mycfg}{zonedir}/$$self{domain}"
}

sub are_same_records_ {
    my ($a, $b) = @_;

    #debug({ a => $a });
    #debug({ b => $b });

    #$a->{priority} eq $b->{priority} &&
    (   $$a{name} eq $$b{name} && 
        $$a{host} eq $$b{host} &&
        $$a{ttl} ==  $$b{ttl} )
}

# returns the lists of domains of a certain type
sub get_records_ {
    my ($zone, $entry) = @_;

    for( lc $$entry{type} ) {
        if      ($_ eq 'a')      { return $zone->a     }
        elsif   ($_ eq 'aaaa')   { return $zone->aaaa  }
        elsif   ($_ eq 'cname')  { return $zone->cname }
        elsif   ($_ eq 'ns')     { return $zone->ns    }
        elsif   ($_ eq 'mx')     { return $zone->mx    }
        elsif   ($_ eq 'ptr')    { return $zone->ptr   }
    }

    die 'Impossible to get the entry type.'
}

sub reload_secondary_dns_servers {
    my $self = shift;
    $_->reload_sec($$self{slavedzones}) for(@{$$self{dnsisec}})
}

sub delete_entry {
    my ($self, $entryToDelete) = @_;

    my $zone = $self->get();

    my $records = get_records_ $zone, $entryToDelete;

    if( defined $records ) {
        foreach my $i ( 0 .. scalar @{$records}-1 ) {
            if(are_same_records_($records->[$i], $entryToDelete)) {
                delete $records->[$i];
            }
        }
    }

    $zone
}

sub modify_entry {
    my ($self, $entryToModify, $newEntry) = @_;

    my $zone = $self->get();

    my $records = get_records_ $zone, $entryToModify;

    if( defined $records ) {

        foreach my $i ( 0 .. scalar @{$records}-1 ) {

            if(are_same_records_($records->[$i], $entryToModify)) {

                say "ENTRY TO MODIFY";

                say $records->[$i]->{name} . ' = ' . $newEntry->{newname};
                say $records->[$i]->{host} . ' = ' . $newEntry->{newhost};
                say $records->[$i]->{ttl}  . ' = ' . $newEntry->{newttl};
                #say $records->[$i]->{type} . ' = ' . $newEntry->{newtype};

                $records->[$i]->{name} = $newEntry->{newname};
                $records->[$i]->{host} = $newEntry->{newhost};
                $records->[$i]->{ttl}  = $newEntry->{newttl};
                #$records->[$i]->{type}  = $newEntry->{newtype};

                if( $$newEntry{newtype} eq 'MX' ) {
                    say 
                    $records->[$i]->{priority}.' = '.$newEntry->{newpriority};
                    $records->[$i]->{priority} = $newEntry->{newpriority};
                }
            }
        }
    }

    dump($records);

    $zone
}

sub get {
    my $self = shift;
    my $file = $self->get_remote_zf_();
    my $dest = $self->get_ztmp_file_();

    copycat ($file, $dest);

    zonefile->new(domain => $$self{domain}, zonefile => $dest);
}

=pod
    copie du template pour créer une nouvelle zone
    update du serial
    ajout de la zone via dnsapp (rndc, knot…)
    retourne la zone + le nom de la zone
=cut

sub addzone {
    my ($self) = @_;

    my $tpl = $self->get_ztpl_file_();
    my $tmpfile = $self->get_ztmp_file_();

    copycat ($tpl, $tmpfile); # get the template

    # get the file path
    my $f = URI->new($tmpfile);

    # sed CHANGEMEORIGIN by the real origin
    mod_orig_template ($f->path, $$self{domain});

    my $zonefile = zonefile->new(zonefile => $f->path
        , domain => $$self{domain});
    $zonefile->new_serial(); # update the serial number

    # write the new zone tmpfile to disk 
    write_file $f->path, $zonefile->output();

    my $file = $self->get_remote_zf_();
    copycat ($tmpfile, $file); # put the final zone on the server
    unlink($f->path); # del the temporary file

    # add new zone on the primary ns
    $self->dnsi->primary_addzone($$self{domain});

    # add new zone on secondary ns
    $self->reload_secondary_dns_servers()
}

=pod
    màj du serial
    push reload de la conf
=cut

sub update {
    my ($self, $zonefile) = @_;

    # update the serial number
    $zonefile->new_serial();

    my $tmpfile = $self->get_ztmp_file_();

    # write the new zone tmpfile to disk 
    write_file $tmpfile, $zonefile->output();

    my $file = $self->get_remote_zf_();
    copycat ($tmpfile, $file); # put the final zone on the server
    unlink($tmpfile); # del the temporary file

    $self->dnsi->reload($$self{domain});
}

=pod
    udpate via the raw content of the zonefile
=cut

sub update_raw {
    my ($self, $zonetext) = @_;

    my $zonefile;
    my $file = $self->get_ztmp_file_();

    # write the updated zone file to disk 
    write_file $file, $zonetext;

    eval { $zonefile = zonefile->new(zonefile => $file
            , domain => $$self{domain}); };

    if( $@ ) {
        unlink($file);
        die 'zone update_raw, zonefile->new error. ' . $@;
    }

    unlink($file);

    $self->update($zonefile)
}

sub del {
    my ($self) = @_;
    $self->dnsi->delzone($$self{domain});
    $self->dnsi->reconfig();
    $self->reload_secondary_dns_servers()
}

1;