#!/usr/bin/perl
# vim: cin :

$repofile = shift;
$repocmd = '';
$repocmd = "-R $repofile" if -f $repofile;
$mainpage = '';

@rep = ();
if ( ! -f $repofile )
{
	@rep = `fossil info | grep 'project-name'`;
}
else
{
	@rep = `fossil info $repofile | grep 'project-name'`;
}

$mainpage = $rep[0];
chomp $mainpage;
$mainpage =~ s/^project-name:\s+//;


@pages = `fossil wiki list $repocmd`;

%pages = ();
foreach $page ( @pages )
{
	chomp $page;
	$text = `fossil wiki export "$page" $repocmd`;
	$pages{$page} = $text;
}

@orphans = ();
@nointernals = ();
@terminals = ();
@empties = ();
%badlinks = ();
%alllinks = ();
%links = ();
foreach $page ( keys %pages )
{
	my @links = ();
	my $text = $pages{$page};
	while ( $text =~ m/\[([^][]+)\]/g )
	{
		push @links,$1;
	}

	$numlinks = $#links;

	if (@links == ())
	{
		push @terminals, $page;
	}
	else
	{
		my @internals = grep { $_ !~ /(http:)|(mailto:)|(https:)/ } @links;
		if (@internals == ())
		{
			push @nointernals, $page;
		}
		else
		{
			@{$links{$page}{'links'}} = map {my ($a,$b) = split /\|/; $a;} @internals;
			foreach $internal ( @internals )
			{
				my ($int_link, $display) = split /\|/, $internal;
				${$links{$int_link}{'refs'}}++;
				$alllinks{$int_link} = 1;
			}
		}
	}

	if ($text eq '' || $text =~ m/^<i>Empty Page<\/i>/)
	{
		chomp $tail;
		my ($head, $tail) = split /\/i>/ , $text;
		if ($tail =~ m/^\s*$/s) {
		 	push @empties, $page;
		}
	}
}
foreach $page ( keys %links )
{
	if ($page ne $mainpage &&  (${$links{$page}{'refs'}} == 0))
	{
		push @orphans, $page;
	}
}
foreach $link (keys %alllinks )
{
	if (! exists($pages{$link}) && $link !~ /^\./ && $link !~ /^\//)
	{
		$badlinks{$link} = 1;
	}
}
foreach $empty ( @empties )
{
	print ("empty: '$empty'\n");
}
foreach $nointernals ( @nointernals )
{
	print ("nointernals: '$nointernals'\n");
}
foreach $terminal ( @terminals )
{
	print ("terminal: '$terminal'\n");
}
foreach $orphan ( @orphans )
{
	print ("orphan: '$orphan'\n");
}
foreach $link ( keys %badlinks )
{
	print ("badlink: '$link'\n");
}
foreach $page ( sort keys %links )
{
	my @links = @{$links{$page}{'links'}};
	if (@links != ())
	{
		if ($page eq $mainpage)
		{
			print "links: *** '$page' *** -> ", join (", ", @links), "\n";
		}
		else
		{
			print "links: '$page' -> ", join (", ", @links), "\n";
		}
	}
}