use warnings;
use strict;
use File::Basename;    # Split filename into dir, file, ext
use IPC::Cmd qw(can_run);
use IPC::System::Simple qw(system capture);
use Test::More tests => 3;

BEGIN {
    use Gscan2pdf::Document;
    use Gscan2pdf::Unpaper;
    use Gtk3 -init;    # Could just call init separately
}

SKIP: {
    skip 'unpaper not installed', 3 unless can_run('unpaper');
    Gscan2pdf::Translation::set_domain('gscan2pdf');
    my $unpaper =
      Gscan2pdf::Unpaper->new(
        { 'output-pages' => 2, layout => 'double', direction => 'rtl' } );

    use Log::Log4perl qw(:easy);
    Log::Log4perl->easy_init($WARN);
    Gscan2pdf::Document->setup(Log::Log4perl::get_logger);

    # Create test image
    system(
        qw(convert +matte -depth 1 -border 2x2 -bordercolor black),
        '-family',
        'DejaVu Sans',
        qw(-pointsize 12 -density 300),
        'label:The quick brown fox',
        '1.pnm'
    );
    system(
        qw(convert +matte -depth 1 -border 2x2 -bordercolor black),
        '-family',
        'DejaVu Sans',
        qw(-pointsize 12 -density 300),
        'label:The slower lazy dog',
        '2.pnm'
    );
    system(qw(convert -size 100x100 xc:black black.pnm));
    system(qw(convert 1.pnm black.pnm 2.pnm +append test.pnm));

    my $slist = Gscan2pdf::Document->new;

    # dir for temporary files
    my $dir = File::Temp->newdir;
    $slist->set_dir($dir);

    $slist->import_files(
        paths             => ['test.pnm'],
        finished_callback => sub {
            $slist->unpaper(
                page    => $slist->{data}[0][2]{uuid},
                options => {
                    command   => $unpaper->get_cmdline,
                    direction => $unpaper->get_option('direction')
                },
                finished_callback => sub {
                    my @level;
                    for my $i ( 0 .. 1 ) {
                        if (
                            capture(
                                'convert',
                                $slist->{data}[$i][2]{filename},
                                qw(-depth 1 -resize 1x1 txt:-)
                            ) =~ qr/gray\((\d{2,3}(\.\d+)?)%?\)/
                          )
                        {
                            $level[$i] = $1;
                            pass "valid PNM created for page $i";
                        }
                        else {
                            fail "valid PNM created for page $i";
                        }
                    }
                    ok( $level[1] > $level[0], 'rtl' );
                    Gtk3->main_quit;
                },
            );
        }
    );
    Gtk3->main;

    unlink 'test.pnm', '1.pnm', '2.pnm', 'black.pnm', <$dir/*>;
    rmdir $dir;
    Gscan2pdf::Document->quit();
}
