<?php

use Gregwar\Image\Image;
use Gregwar\Image\GarbageCollect;
use ColorThief\ColorThief;

/**
  * Handle garbage collection w/ the temp images generated locally
  */
$lastRunLog = getcwd() . '/dist/last-run.log';

if (file_exists($lastRunLog)) {
  $lastRun = file_get_contents($lastRunLog);
  if (time() - $lastRun >= 86400) {
    //its been more than a day so run our cleanup task

    // This could be a cron called each day @3:00AM for instance
    // Removes all the files from ../cache that are more than 30 days
    // old. A verbose output will explain which files are deleted
    GarbageCollect::dropOldFiles(getcwd() .'/cache', 30, true);

    //update lastrun.log with current time
    file_put_contents($lastRunLog, time());
  }
} else {
  // If this is the first time we're running our cleanup task, create the initial cache file
  file_put_contents($lastRunLog, time());
}


$function = new Twig_SimpleFunction('bgcolor', function ($relativeImagePath){
  // If this isn't a production compile, let's not do this long very memory intensive process.
  if (getenv('NODE_ENV') !== 'production') {
    return 'hsl(233, 33%, 97%)'; // lightest gray from our colors to use as default when in dev mode
  }

  if (!function_exists('rgb2hex')) {
    function rgb2hex($rgb) {
      $hex = "#";
      $hex .= str_pad(dechex($rgb[0]), 2, "0", STR_PAD_LEFT);
      $hex .= str_pad(dechex($rgb[1]), 2, "0", STR_PAD_LEFT);
      $hex .= str_pad(dechex($rgb[2]), 2, "0", STR_PAD_LEFT);
      return $hex; // returns the hex value including the number sign (#)
    }
  }


  $publicDir = '/dist';
  $absoluteImagePath = getcwd() . $publicDir . $relativeImagePath;

  if(file_exists($absoluteImagePath)){
    $fileExt = pathinfo($absoluteImagePath, PATHINFO_EXTENSION);

    if (($fileExt != "jpg") && ($fileExt != "png")){ // Skip over non-jpg or png files.
      return;
    }

    // Resize and optimize the image before running through ColorThief
    $resizedImage = \Gregwar\Image\Image::open($absoluteImagePath)->resize('640,640')->jpeg($quality = 50);
      $color = ColorThief::getColor($resizedImage, 5);
      return rgb2hex($color);
    // }
  } else {
    return;
  }
});

?>