#!/usr/bin/perl

use strict;
use warnings;

use Getopt::Long;
use IO::Async::Stream 0.57;
use IO::Async::Loop;
use Net::Async::Webservice::S3;

GetOptions(
   'meta|m=s' => \my %META,
) or exit 1;

my $loop = IO::Async::Loop->new;

my %config = do {
   open my $rc, "<", ".s3rc" or die "Cannot read .s3rc config - $!\n";
   map { chomp; m/^(.*?)=(.*)$/ } <$rc>;
};

my ( $bucket, $prefix ) = split m{/}, ( $config{bucket} || die "Could not find 'bucket' in config\n" ), 2;
my $s3 = Net::Async::Webservice::S3->new(
   access_key => ( $config{access_key} || die "Could not find 'access_key' in config\n" ),
   secret_key => ( $config{secret_key} || die "Could not find 'secret_key' in config\n" ),
   ssl        => $config{ssl},
   bucket     => $bucket,
   prefix     => $prefix,
);

$loop->add( $s3 );

$loop->add( my $stdin = IO::Async::Stream->new_for_stdin( on_read => sub { 0 } ) );

# TODO: IO::Async::Stream 0.58's ->is_read_eof isn't set until after the read
# handler returns, so we need to capture $eof here to detect the EOF condition

my $eof;
$s3->put_object(
   key => shift @ARGV,
   gen_parts => sub {
      return if $eof;
      return $stdin->read_exactly( 100*1024*1024 ) # 100 MiB
         ->on_done( sub { ( undef, $eof ) = @_; } );
   },
   meta => \%META,
)->get;