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<?php declare(strict_types=1);

namespace DrupalCodeGenerator\Helper;

use DrupalCodeGenerator\Asset\Asset;
use DrupalCodeGenerator\Asset\AssetCollection;
use DrupalCodeGenerator\IOAwareInterface;
use DrupalCodeGenerator\IOAwareTrait;
use Symfony\Component\Console\Helper\Helper;
use Symfony\Component\Console\Helper\TableSeparator;
use Symfony\Component\Console\Helper\TableStyle;

/**
 * Result printer for generators.
 */
class ResultPrinter extends Helper implements IOAwareInterface {

  use IOAwareTrait;

  /**
   * {@inheritdoc}
   */
  public function getName(): string {
    return 'result_printer';
  }

  /**
   * Prints summary.
   *
   * @param \DrupalCodeGenerator\Asset\AssetCollection $assets
   *   List of created or updated assets.
   * @param string $base_path
   *   (Optional) Base path.
   */
  public function printResult(AssetCollection $assets, string $base_path = ''): void {
    if (\count($assets) > 0) {
      $this->io->title('The following directories and files have been created or updated:');
      $this->io->isVerbose() ?
        $this->printTable($assets, $base_path) : $this->printList($assets, $base_path);
    }
  }

  /**
   * Prints assets in tabular form.
   */
  protected function printTable(AssetCollection $assets, string $base_path): void {

    $headers[] = ['Type', 'Path', 'Lines', 'Size'];

    $rows = [];

    foreach ($assets->getDirectories()->getSorted() as $directory) {
      $rows[] = ['directory', $this->formatPath($base_path, $directory), '-', '-'];
    }

    $total_size = $total_lines = 0;
    foreach ($assets->getFiles()->getSorted() as $file) {
      $file_content = $file->getContent();
      $size = $file_content === NULL ? 0 : \mb_strlen($file_content);
      $total_size += $size;
      $lines = $size == 0 ? 0 : \substr_count($file->getContent(), "\n") + 1;
      $total_lines += $lines;
      $rows[] = ['file', $this->formatPath($base_path, $file), $lines, $size];
    }

    foreach ($assets->getSymlinks()->getSorted() as $symlink) {
      $rows[] = ['symlink', $this->formatPath($base_path, $symlink), '-', '-'];
    }

    $rows[] = new TableSeparator();

    // Summary.
    $total_assets = \count($assets);
    $rows[] = [
      '',
      \sprintf('Total: %d %s', $total_assets, $total_assets == 1 ? 'asset' : 'assets'),
      $total_lines,
      self::formatMemory($total_size),
    ];

    $right_aligned = (new TableStyle())->setPadType(\STR_PAD_LEFT);
    $this->io
      ->buildTable($headers, $rows)
      ->setColumnStyle(2, $right_aligned)
      ->setColumnStyle(3, $right_aligned)
      ->render();

    $this->io->newLine();
  }

  /**
   * Prints assets as a bulleted list.
   */
  protected function printList(AssetCollection $assets, string $base_path): void {
    $dumped_files = [];
    // Group results by asset type.
    $assets = $assets->getSorted();
    foreach ($assets->getDirectories() as $directory) {
      $dumped_files[] = $this->formatPath($base_path, $directory);
    }
    foreach ($assets->getFiles() as $file) {
      $dumped_files[] = $this->formatPath($base_path, $file);
    }
    foreach ($assets->getSymlinks() as $symlink) {
      $dumped_files[] = $this->formatPath($base_path, $symlink);
    }
    $this->io->listing($dumped_files);
  }

  /**
   * Returns formatted path of a given asset.
   */
  protected function formatPath(string $base_path, Asset $asset): string {
    $path = $asset->getPath();
    if ($path[0] != '/') {
      $path = $base_path . $path;
    }
    return $path;
  }

}