package Subtitle::SSA::Font;

use strict;
use warnings;
use utf8;

sub new {
  my ($class, %opts) = @_;
  my $self = {
    _eol  => "\n",
    _data => '',
    _name => $opts{name} // '',
    _error => undef,
  };

  return bless($self, $class);
}

sub error {
  my ($self, $text) = @_;

  if (defined $text) {
    $self->{_error} = $text;
    return;
  }
  return $self->{_error};
}

sub parse {
  my ($self, $line) = @_;

  return unless $line;

  chomp $line;
  $self->error('not like uuencoded line')
    if (length($line) > 80);
  $self->{_data} .= $line;

  return length($line);
}

sub save {
  my ($self, $path) = @_;

  open my $FH, '>', $path
    or return $self->error("can't open file: $path -- $!");
  print $FH pack("u*", $self->{_data});
  close $FH;

  return 1;
}

sub load {
  my ($self, $path) = @_;

  open my $FH, '<', $path
    or return $self->error("can't open file: $path -- $!");
  local $/ = undef;
  $self->{_data} = unpack("u*", <$FH>);
  close $FH;

  return 1;
}

sub to_string {
  my ($self) = @_;
  my $out = "fontname: " . $self->{_name} . $self->{_eol};
  my @lines = unpack("A80", $self->{_data});
  $out .= join($self->{_eol}, @lines);
  $out .= $self->{_eol};
  return $out;
}

1;