use v5.030;

use PDL;
use MCE 1.895;
use Math::Prime::Util;
use Math::Random;
use Math::Random::MT::Auto;

CORE::srand(42);   # This also, for MCE predictable results
                   # MCE sets internal seed = CORE::random()

PDL::srandom(42);  # PDL::srand(N) v2.062 ~ v2.089
Math::Prime::Util::srand(42);
Math::Random::random_set_seed(42, 42);
Math::Random::MT::Auto::set_seed(42);

MCE->new(
  max_workers => MCE::Util::get_ncpu(),
  chunk_size  => 1,
  init_relay  => 0,
  posix_exit  => 1,
  sequence    => [ 1, 1000 ],

  user_func => sub {
  # my ($mce, $seq, $chunk_id) = @_;

    my $seq    = $_;
    my $output = "";

    # Worker seeds generator using MCE's seed and wid value.
    # For sequence of numbers, compute similarly using $seq value.
    my $seed = abs(MCE->seed - ($seq * 100000)) % 1073741780;

    CORE::srand($seed);
  # PDL::srand($seed);    # PDL v1.062 ~ 1.089
    PDL::srandom($seed);  # PDL v1.089_01
    Math::Prime::Util::srand($seed);
    Math::Random::random_set_seed($seed, $seed);
    Math::Random::MT::Auto::set_seed($seed);

    my $prngMT = Math::Random::MT::Auto->new();
    $prngMT->srand($seed);

    for ( 1 .. 1e6 ) {
      # my $r = CORE::rand();
      # my $r = PDL->random();
      # my $r = Math::Prime::Util::drand();
      # my $r = Math::Prime::Util::irand64();
      # my $r = Math::Random::random_normal();
      # my $r = Math::Random::random_uniform();
      # my $r = Math::Random::MT::Auto::rand();

        my $r = $prngMT->rand();

        $output .= "$r\n";
    }

    MCE::relay { print $output; };
  }
)->run;