#!/usr/bin/perl

use strict;

our $images_dir = "/home/lens/Desktop/woodtripod/";
our $thumbs_dir = "/home/lens/Desktop/thumbs/randomcrops5k/";

our $count = 5000;

mkdir($thumbs_dir);
mkdir($thumbs_dir . "A/");
mkdir($thumbs_dir . "B/");
mkdir($thumbs_dir . "A/train/");
mkdir($thumbs_dir . "B/train/");
mkdir($thumbs_dir . "A/val/");
mkdir($thumbs_dir . "B/val/");
mkdir($thumbs_dir . "A/test/");
mkdir($thumbs_dir . "B/test/");

our @files = ();

opendir DIR, $images_dir;
while (readdir DIR) {
  next if /^\./;
  push(@files, $_);
}
closedir DIR;

our @images = sort @files;

# assume all images are same size
our $w = 1920;
our $h = 1080;

our $dw = 256;
our $dh = 256;

my $i; my $x; my $y; my $dir;
for ($i = 0; $i < $count; $i++) {
  my $id = int($i/$count * (scalar @images - 1));
  if ( ($id % 7) == 3) {
    $dir = "test/";
  } elsif ( ($id % 7) == 6) {
    $dir = "val/";
  } else {
    $dir = "train/";
  }
  if ( $i && ($i % 1000) == 0) {
    print($id . "...\n")
  }

  my $x = int(rand($w - $dw));
  my $y = int(rand($h - $dh));
  my $a_frame = $images_dir . $images[$id];
  my $b_frame = $images_dir . $images[$id+1];
  my $crop = $dw . "x" . $dh . "+" . $x . "x" . $y;
  my $fn = sprintf("frame_%04d.png", $i);
  print "$fn $x $y $a_frame\n";
  system("convert", $a_frame, "-crop", $crop, $thumbs_dir . "A/" . $dir . $fn);
  system("convert", $b_frame, "-crop", $crop, $thumbs_dir . "B/" . $dir . $fn);
}
print $count . "\n";