#!/usr/bin/env perl
use 5.014;
use warnings;

my $failcount = 0;

for my $src (@ARGV) {
	my ($name, @cmds) = split /:/, $src =~ s/\.(\w+)\z//r;
	my $ext = $1 // '*';
	next if $name =~ m/\./;
	unless (-e $src) {
		($src) = grep {-e} glob qq<"$name"{,:*}.$ext> or next;
	}
	say $name;

	if (@cmds and $cmds[0] =~ /^\d/) {
		# crop shorthand from initial dimension argument
		my @crop = split /\D/, shift @cmds;
		unshift @cmds, -gravity => 'southeast', -chop => "$crop[2]%x$crop[3]%"
			if @crop > 2;
		unshift @cmds, -chop => "$crop[0]%x$crop[1]%";
	}
	unshift @cmds, -gravity => 'northwest' if @cmds;
	push @cmds, -resize => '300x200^', -gravity => 'north', -extent => '300x200';
	push @cmds, '-strip', -quality => '60%';
	system(convert => @cmds, $src => "../$name.jpg") == 0
		or $failcount += warn "error creating $name.jpg from $src\n";
}

exit $failcount;