#!/usr/bin/env perl
use strict;
use warnings;

=head1 DESCRIPTION

Look for \cite commands that are not preceeded by a \citea command. This means
that there is no text cite before a numbered cite.

=cut

my %seen;
my %output;

while (<<>>) {
	next if m/^\s*%/;
	while (m/\\(?<cmd>citea?)\{(?<keys>.*?)\}/g) {
		my $keys = $+{keys};
		my $cmd = $+{cmd};

		for my $key (split /,/, $keys) {
			$key = trim($key);
			$seen{$key}++ if $cmd eq "citea";
			print "incorrect order: $cmd - $key\n" if !defined $seen{$key} and $output{$key}++==0;
		}
	}
}

sub trim {
	my $str = shift;
	$str =~ s/\s*$//;
	$str =~ s/^\s*//;
	return $str;
}