#!/usr/bin/perl

BEGIN { if (-e $ENV{SITE}.'/lib') { use lib $ENV{SITE}.'/lib'; } }


use config qw(loadYaml $config);
use essential qw(sdate version);
use misc qw(khash yamlify);
use TXPOOL qw(saveTxPool txdigest);
use CAStore qw(CASWrite);
use ECKeys qw(ecsign ecverif getPeerid loadKeys);
use YAML::Syck qw(LoadFile Dump DumpFile);

my $keys = loadKeys($ENV{SITE}.'/secrets/keys.yml');
our $aliases = &loadYaml($ENV{SITE}.'/secrets/aliases.yml');

my $keyfile = $ENV{SITE}.'/secrets/coinbase.yml';
if (-e $keyfile) {
  my $local_keys = &loadKeys($keyfile);
  if (exists $keys->{coinbase}) {
    $keys->{coinbase}{private} = $local_keys->{coinbase}{private};
  } else {
    $keys->{coinbase} = $local_keys->{coinbase};
  }
}

foreach my $id (keys %{$keys}) { # list all known aliases ...
   my $pub = $keys->{$id}{public};
   $aliases->{$pub} = $id if (! defined $aliases->{$pub});
   printf " - %-13s: %-46s (%-36s);",$id,$pub,$keys->{$id}{name};
   printf " bot:%s\n", &botname::botname($pub);
}

printf "--- keys %s...\n",Dump($keys);
#printf "--- aliases %s...\n",Dump($aliases);

my $txf = shift;
my $tx = LoadFile($txf);
my $date = (exists $tx->{timestamp})? &sdate($tx->{timestamp}) : &sdate(time);



my %signatures = ();
my %delta = ();
foreach my $sign (@{$tx->{signatures}}) {
      my ($pub) = keys %{$sign};
      $signatures{$pub} = $sign->{$pub};
      $delta{$pub} = 0;
}
printf "--- signatures %s...\n",Dump(\%signatures);
foreach my $in (@{$tx->{inputs}}) {
      my ($pub) = keys %{$in};
      my $id = (exists $aliases->{$pub}) ? $aliases->{$pub} : $pub;
      my $key58 = (exists $keys->{$id}) ? $keys->{$id}{public} : $pub;
      my $value = $in->{$pub};
      $valuein += $value;
      $delta{$pub} -= $value;
      printf "in: %s from %s (%s)\n",$value,$id,$key58;
}
foreach my $out (@{$tx->{outputs}}) {
      my ($pub) = keys %{$out};
      my $id = (exists $aliases->{$pub}) ? $aliases->{$pub} : $pub;
      my $key58 = (exists $keys->{$id}) ? $keys->{$id}{public} : $pub;
      my $value = $out->{$pub};
      $valueout += $value;
      $delta{$pub} += $value;
      printf "out: %s to %s (%s)\n",$value,$id,$key58;
}
if ($valuein < $valueout) { 
      printf "error: i:%s < o:%s\n",$valuein,$valueout;
}
my $txi = {
  timestamp => $tx->{timestamp},
  inputs => $tx->{inputs}
};
my $txo = {
  timestamp => $tx->{timestamp},
  message => $tx->{message},
  outputs => $tx->{outputs}
};
my $txio = {
  timestamp => $tx->{timestamp},
  message => $tx->{message},
  inputs => $tx->{inputs},
  outputs => $tx->{outputs}

};
  my $txihash = khash('SHA256',yamlify($txi));
  my $txohash = khash('SHA256',yamlify($txo));
  my $txhash = khash('SHA256',yamlify($txio));

foreach my $pub (keys %delta) {
  my $value = -$delta{$pub};
  my $id = (exists $aliases->{$pub}) ? $aliases->{$pub} : $pub;
  if (exists $signatures{$pub}) {
    my $key58 = (exists $keys->{$id}) ? $keys->{$id}{public} : $pub;
    my $msg;
    if ($value > 0) { # input
      $msg = sprintf q'[%s,%s,%s]',$pub,$value,&txdigest($txihash);
    } elsif ($value == 0) {
      $msg = sprintf q'[%s,%s,%s]',$pub,$value,&txdigest($txiohash);
    } else { # output
      $msg = sprintf q'[%s,%s,%s]',$pub,$value,&txdigest($txohash);
    }
    printf "msg: %s\n",$msg;
    if (defined $signatures{$pub}) {
      printf "signatures.%s: %s\n",$pub, join',',@{signatures{$pub}};
      my $sig = $signatures{$pub}[0];
      my $sigok = &ecverif($key58,$sig,$msg);
      printf "signature for %s (%s) ? %s\n",$id,$key58,($sigok)?'ok':'invalid';
      if (! $sigok) {
        my $sig = &ecsign($id,$msg);
        printf "sig: %s: %s (corrected)\n",$id,$sig;
        $signatures{$pub} = [ $sig, $date, $msg ];
      }
    } else {
      my $id = (exists $aliases->{$pub}) ? $aliases->{$pub} : $pub;
      if (exists $keys->{$id}{private}) {
        my $sig = &ecsign($id,$msg);
        printf "sig: %s: %s\n",$id,$sig;
        $signatures{$pub} = [ $sig, $date, $msg ];
      } else {
        printf "sig: don't have private key for %s\n",$id;
      }
    }
  }
}

foreach my $sign (@{$tx->{signatures}}) {
   my ($pub) = keys %{$sign};
   $sign->{$pub} = $signatures{$pub};
}

printf "--- %s.sig: %s...\n",$txf,Dump($tx);
DumpFile("$txf.sig",$tx);

$tx->{nonce} = 3976914969180171529,
my $txaddr = CASWrite($ENV{SITE}.'/txpool',$tx,$tx->{nonce},'txpool',$config->{difficulty});

push @{$TXPOOL},$txaddr;
&saveTxPool($TXPOOL);

exit $?;