#!/usr/bin/perl

use strict;
use warnings;

use Panotools::Script;

for my $path_pto (@ARGV)
{
    my $pto = new Panotools::Script;
    $pto->Read ($path_pto);
    print STDOUT "---\nHugin project file: $path_pto\n";

    # general project info
    print STDOUT "Project:\n";
    print STDOUT '    Number of images: '. scalar (@{$pto->Image}) ."\n";
    for my $item (@{$pto->Panorama->Report}, @{$pto->Option->Report}, @{$pto->Mode->Report})
    {
        print STDOUT '    '. (join ': ', @{$item}) ."\n";
    }

    # summarise control points
    my $results = {};
    for my $control (@{$pto->Control})
    {
        my $t = $control->{t};
        $results->{$t} += 1;
    }
    print STDOUT "    Normal control points: ". $results->{0} ."\n" if (defined $results->{0});
    delete $results->{0};
    my ($total, $min, $max, $average, $sigma) = $pto->Stats;
    print STDOUT "    Average normal control point error: $average\n";
    print STDOUT "    Maximum normal control point error: $max\n";
    print STDOUT "    Horizontal control points: ". $results->{1} ."\n" if (defined $results->{1});
    delete $results->{1};
    print STDOUT "    Vertical control points: ". $results->{2} ."\n" if (defined $results->{2});
    delete $results->{2};
    print STDOUT "    Straight lines: ". scalar (keys %{$results}) ."\n" if (scalar keys %{$results});

    for my $index (0 .. scalar (@{$pto->Image}) - 1)
    {
        # summarise input image
        print STDOUT "Image $index:\n";
        my @items = @{$pto->Image->[$index]->Report};
        push @items, @{$pto->ImageMetadata->[$index]->Report} if defined $pto->ImageMetadata->[$index];
        push @items, @{$pto->Variable->Report ($index)};
        for my $item (@items)
        {
            print STDOUT '    '. (join ': ', @{$item}) ."\n";
        }

        # summarise control points for this image
        my $results = {};
        for my $control (@{$pto->Control})
        {
            my $N = $control->{N};
            my $n = $control->{n};
            next unless ($n == $index or $N == $index);
            $results->{$N} += 1;
            $results->{$n} += 1;
        }
        delete $results->{$index};
        for my $key (sort keys %{$results})
        {
            print STDOUT "    Connections to image $key: ". $results->{$key} ."\n";
        }
    }
}

__END__

=head1 NAME

ptoinfo - Prints human readable reports for .pto files

=head1 Synopsis

  ptoinfo project1.pto [project2.pto ...]

=head1 DESCRIPTION

Takes one or more hugin .pto projects and outputs a text report on STDOUT,
the report is incidentally in YAML format.

=head1 Calling syntax

  ptoinfo <pto-file> <pto-file> ...

=head1 License

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

=head1 See Also

L<http://panotools.sourceforge.net/>

=head1 Author

Bruno Postle, E<lt>bruno (at) postle.netE<gt>

=cut