#!/usr/bin/env perl
use strict;
use warnings;
use 5.010;
use autodie;

use GD;
use Getopt::Std;
use IPC::Run qw(run);

my %opts;

getopts('a:cfgh:o:w:C:', \%opts);

my $alpha  = $opts{a} // 0;
my $width  = $opts{w} // 200;
my $height = $opts{h} // 80;

my $outfile = $opts{o} // '/tmp/vwrap.png';

my $im = GD::Image->new($width, $height);
$im->saveAlpha(1);

my $white = $im->colorAllocateAlpha(255, 255, 255, $alpha);
my $gray  = $im->colorAllocateAlpha(127, 127, 127, $alpha);
my $fg = $im->colorAllocateAlpha(  0,   0,   0, $alpha);
my $bg = $im->colorAllocateAlpha(  0,   0,   0, 127);
my $buf;

if ($opts{'C'}) {
	$fg = $im->colorAllocateAlpha(split(qr{,}, $opts{'C'}), $alpha);
}

run(\@ARGV, \undef, \$buf, \*STDERR);

$buf =~ s/ä/a/g;
$buf =~ s/ö/o/g;
$buf =~ s/ü/u/g;

my @lines = split(/\n/, $buf);

if ($opts{'c'}) {
	say join("\n", @lines);
}
elsif ($opts{'g'}) {
	$im->filledRectangle(0, 0, $width, $height, $bg);

	my $used_height = @lines * 10;

	if ($used_height > $height) {
		$used_height = $height;
	}

	if ($used_height) {
		$used_height += 8;
		$im->filledRectangle(0, 0, $width, $used_height, $white);
		$im->rectangle(0, 0, $width, $used_height, $gray);
	}

	for my $i (0 .. $#lines) {
		$lines[$i] =~ s{\t}{};
		$im->string(gdSmallFont, 2, 2 + (10 * $i), $lines[$i], $fg);
	}

	open(my $out_fh, '>', $outfile);
	binmode $out_fh;
	print $out_fh $im->png();
	close($out_fh);
}

if ($opts{'f'}) {
	exec('feh', $outfile);
}