<?php
namespace Contabilidad\Common\Service;

use Contabilidad\Common\Concept\DocumentHandler;
use GuzzleHttp\Client;

class PdfHandler extends DocumentHandler {
  protected Client $client;
  protected string $url;
  public function __construct(Client $client, string $pdf_folder, string $url) {
    parent::__construct($pdf_folder);
    $this->client = $client;
    $this->url = $url;
  }

  public function load(): ?array {
    $folder = $this->folder;
    $files = new \DirectoryIterator($folder);
    $output = [];
    foreach ($files as $file) {
      if ($file->isDir() or $file->getExtension() != 'pdf') {
        continue;
      }
      $output []= ['filename' => $file->getBasename()];
    }
    $response = $this->client->post($this->url, ['json' => ['files' => $output]]);
    $output = json_decode($response->getBody());
    return $this->build($output);
  }
  protected function build(array $data): ?array {
    foreach ($data as &$file) {
      $i = $this->findStartRow($file->text);
      if ($i === -1) {
        continue;
      }
      $e = $this->findEndRow($file->text, $i);
      if ($e == $i) {
        continue;
      }
      $file->data = array_filter($file->text, function($key) use ($i, $e) {
        return ($key >= $i) and ($key <= $e);
      }, ARRAY_FILTER_USE_KEY);
    }
    return $data;
  }
  protected function findStartRow(array $data): int {
    foreach ($data as $i => $row) {
      if (!is_array($row)) {
        continue;
      }
      $maybe = false;
      foreach ($row as $cell) {
        if (str_contains($cell, '/')) {
          $maybe = true;
        }
        if ($maybe and str_contains($cell, '$')) {
          return $i - 1;
        }
      }
    }
    return -1;
  }
  protected function findEndRow(array $data, int $start): int {
    $l = count($data[$start]);
    for ($i = $start; $i < count($data); $i ++) {
      if (!is_array($data[$i])) {
        return $i - 1;
      }
      if (count($data[$i]) != $l) {
        return $i - 1;
      }
    }
    return $start;
  }
}