<?php
namespace Contabilidad\Common\Service;

use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Worksheet\MemoryDrawing;
use thiagoalessio\TesseractOCR\TesseractOCR;
use Contabilidad\Common\Concept\DocumentHandler;

class XlsHandler extends DocumentHandler {
  public function load(): ?array {
    $folder = $this->folder;
    $files = new \DirectoryIterator($folder);
    $output = [];
    foreach ($files as $file) {
      if ($file->isDir() or $file->getExtension() != 'xls') {
        continue;
      }
      $reader = IOFactory::createReader(ucfirst($file->getExtension()));
      $xls = $reader->load($file->getRealPath());
      $data = [];
      $bank = 'unknown';
      for ($s = 0; $s < $xls->getSheetCount(); $s ++) {
        $sheet = $xls->getSheet($s);
        foreach ($sheet->getRowIterator() as $row) {
          $r = [];
          foreach ($row->getCellIterator() as $cell) {
            $r []= $cell->getValue();
          }
          $data []= $r;
        }
        foreach ($sheet->getDrawingCollection() as $drawing) {
          if ($drawing instanceof MemoryDrawing) {
            ob_start();
            call_user_func(
              $drawing->getRenderingFunction(),
              $drawing->getImageResource()
            );
            $imageContents = ob_get_contents();
            $size = ob_get_length();
            ob_end_clean();
            $ocr = new TesseractOCR();
            $ocr->imageData($imageContents, $size);
            $image = $ocr->run();
            if (str_contains($image, 'BICE')) {
              $bank = 'BICE';
            }
            if (str_contains($image, 'Scotiabank')) {
              $bank = 'Scotiabank';
            }
          }
        }
      }
      $output []= ['bank' => $bank, 'filename' => $file->getBasename(), 'data' => $data];
    }
    return $this->build($output);
  }
  protected function build(array $data): ?array {
    return $data;
  }
}