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=item L<URI::Escape> from C<liburi-escape-xs-perl>

=item L<Encode::Locale> from C<libencode-locale-perl>

=item L<Text::Wrapper> from C<libtext-wrapper-perl>

=back

=cut

use Modern::Perl '2018';
use Mojo::IOLoop;
use Pod::Text;
use Getopt::Long;
use Term::ReadLine; # install Term::ReadLine::Gnu
use Term::ANSIColor qw(colorstrip colored);
use URI::Escape qw(uri_escape uri_unescape);
use Encode::Locale;
use Encode qw(decode_utf8 encode_utf8 decode encode);
use Text::Wrapper;
use File::Slurper qw(read_text write_text);
use IPC::Open2;
use utf8;

my $cert;
my $key;
my $help;
my $stream;
my $verbose;
my $wrapper = Text::Wrapper->new();

GetOptions(
  'cert_file=s' => \$cert,
  'key_file=s' => \$key,
  'help' => \$help,
  'verbose' => \$verbose,
  'stream' => \$stream)
    or die("Error in command line arguments\n");

# Help
if ($help) {
  my $parser = Pod::Text->new();
  $parser->parse_file($0);
  exit;
}

# Regular arguments
my ($url) = @ARGV;

die "âš  You must provide a URL, e.g. gemini://campaignwiki.org/play/ijirait\n" unless $url;
die "âš  You must provide --cert_file, e.g. --cert_file=cert.pem\n" unless $cert;
die "âš  You must provide --key_file, e.g. --key_file=key.pem\n" unless $key;
die "âš  You must provide an existing --cert_file\n" unless -f $cert;
die "âš  You must provide an existing --key_file\n" unless -f $key;

$stream = 1 if $url =~ /\/stream$/;

my $talk_url = "$url/type";

my($scheme, $authority, $path, $query, $fragment) =
    $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;

die "âš  The URL '$url' must use the gemini scheme\n" unless $scheme and $scheme eq 'gemini';

my ($host, $port) = split(/:/, $authority, 2);
$port //= 1965;

if ($stream) {
  stream();
} else {
  play();
}

sub stream {
  say "Use 'Ctrl+C' to quit.";
  # Start client for listening
  Mojo::IOLoop->client({
    address => $host,
    port => $port,
    tls => 1,
    tls_cert => $cert,
    tls_key => $key,
    tls_options => { SSL_verify_mode => 0x00 }} => sub {
      my ($loop, $err, $stream) = @_;
      # 1h timeout (for chat)
      $stream->timeout(3600);
      $stream->on(read => sub {
	my ($stream, $bytes) = @_;
	my $text = to_text(decode_utf8($bytes));
	print encode(locale => $text) });
      $stream->on(close => sub {
	say "Connection closed";
	exit });
      # Write request to the server
      $stream->write("$url\r\n")});
  # Start event loop if necessary
  Mojo::IOLoop->start unless Mojo::IOLoop->is_running;
}

sub play {
  say "Use 'quit' to leave the game. Use '\\' to send a newline.";

  my @queue = qw(look);

  # start read loop for saying stuff
  my $term = Term::ReadLine->new("Ijirait");
  my $prompt = "> ";
  my $OUT = $term->OUT || \*STDOUT;
  while (defined ($_ = shift(@queue) || $term->readline($prompt))) {
    exit if $_ eq "quit";
    # Handle <
    my $command = decode(locale => $_);
    if ($command =~ /^(.*?)\s*<\s*([^|<>]+?)\s*$/s) {
      if (-f $2) {
	$command = $1 . " " . decode_utf8(read_text($2));
      } else {
	say "Cannot read $2";
	next;
      }
    }