#!/usr/bin/perl

use strict;
use warnings;
use Getopt::Long;
use Pod::Usage;
use File::Spec;
use FindBin;
use lib "$FindBin::Bin/../lib";

use Crypt::TSD;

# Command line options
my $help = 0;
my $version = 0;
my $timestamp_file;
my $output_file;
my $verbose = 0;

# Parse command line options
GetOptions(
    'help|h' => \$help,
    'version' => \$version,
    'timestamp|t=s' => \$timestamp_file,
    'output|o=s' => \$output_file,
    'verbose|v' => \$verbose,
) or pod2usage(2);

# Show help
if ($help) {
    pod2usage(-verbose => 2);
    exit 0;
}

# Show version
if ($version) {
    print "tsd-create version $Crypt::TSD::VERSION\n";
    exit 0;
}

# Get input file from command line
my $input_file = shift @ARGV;
if (!$input_file) {
    print "Error: Input file required\n";
    pod2usage(1);
}

# Check if input file exists
unless (-f $input_file) {
    die "Error: Input file '$input_file' not found\n";
}

# Generate output filename if not provided
unless ($output_file) {
    $output_file = $input_file;
    $output_file =~ s/\.([^.]+)$/.tsd/;
}

# Check if timestamp file is provided
unless ($timestamp_file) {
    die "Error: Timestamp file required. Use -t option or --timestamp\n";
}

# Check if timestamp file exists
unless (-f $timestamp_file) {
    die "Error: Timestamp file '$timestamp_file' not found\n";
}

print "Creating TSD file...\n" if $verbose;
print "Input file: $input_file\n" if $verbose;
print "Timestamp file: $timestamp_file\n" if $verbose;
print "Output file: $output_file\n" if $verbose;

# Create TSD file
eval {
    my $result = Crypt::TSD->write_tds($input_file, $timestamp_file, $output_file);
    print "TSD file created successfully: $result\n";
};
if ($@) {
    die "Error creating TSD file: $@\n";
}

print "Done!\n";

__END__

=head1 NAME

tsd-create - Create a TimeStampedData (.tsd) file from a file and timestamp

=head1 SYNOPSIS

tsd-create [options] input_file

Options:
    -t, --timestamp FILE    Timestamp file (.tsr) to use
    -o, --output FILE       Output .tsd file (default: input_file.tsd)
    -v, --verbose           Verbose output
    -h, --help              Show this help
    --version               Show version

=head1 DESCRIPTION

Creates a TimeStampedData (.tsd) file by combining an input file with a
timestamp token (.tsr file). The timestamp file should be a valid RFC 3161
TimeStampToken in DER format.

=head1 EXAMPLES

    # Create TSD file with timestamp
    tsd-create -t timestamp.tsr document.pdf

    # Specify output file
    tsd-create -t timestamp.tsr -o document.tsd document.pdf

    # Verbose output
    tsd-create -v -t timestamp.tsr document.pdf

=head1 SEE ALSO

L<Crypt::TSD>, L<Crypt::TimestampedData>

=cut