#!/usr/bin/perl

use warnings;
use strict;

use feature qw(switch);
no if $] >= 5.018, warnings => "experimental::smartmatch";

use Pandoc::Filter 0.06;
use Pandoc::Elements;

my ( $frontmatter_seen, $mainmatter_seen, $backmatter_seen);

pandoc_filter(
	\&matter,
	\&toc,
);

sub matter {
	my $self = shift;
	return unless ( $self->name eq 'Header' );
	return unless ( $self->level == 1 );
	given (stringify($self)) {
		when ( /^Table/ and not $frontmatter_seen++ ) {
			return [
#				RawBlock( 'latex', '\\frontmatter' ),
				RawBlock( 'latex',
					'{\\hypersetup{linkcolor=black}\\setcounter{tocdepth}{3}\\cleartorecto\\tableofcontents}'
				),
			] };
		when ( /^Scope/ and not $mainmatter_seen++ ) {
			return [
				RawBlock( 'latex', '\\mainmatter' ),
				$self,
			] };
		when ( /^Notes/ and not $backmatter_seen++ ) {
			return [
				RawBlock( 'latex', '\\backmatter' ),
				Header( 1, attributes {},
					[ Str 'References' ] ),
			] };
		default { return };
	}
}

sub toc {
	my $self = shift;
	return []
		if ( $self->name eq 'Para' and stringify($self) =~ /__TOC__/ );
	return;
}