<?php

/**
 * @file
 * OCFL Export module hooks and functions.
 */

declare(strict_types=1);

use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Url;
use Drupal\media\MediaInterface;
use Drupal\node\NodeInterface;

/**
 * Implements hook_node_insert().
 */
function ocfl_export_node_insert(NodeInterface $node): void {
  _ocfl_export_save_node($node);
}

/**
 * Implements hook_node_update().
 */
function ocfl_export_node_update(NodeInterface $node): void {
  _ocfl_export_save_node($node);
}

/**
 * Implements hook_node_delete().
 */
function ocfl_export_node_delete(NodeInterface $node): void {
  $config = \Drupal::config('ocfl_export.settings');

  if (!$config->get('auto_export_enabled')) {
    return;
  }

  $content_types = $config->get('content_types') ?: [];
  if (!empty($content_types) && !in_array($node->bundle(), $content_types, TRUE)) {
    return;
  }

  try {
    /** @var \Drupal\ocfl_export\OcflStorageService $storage */
    $storage = \Drupal::service('ocfl_export.storage');
    $storage->markDeleted($node);
  }
  catch (\Exception $e) {
    \Drupal::logger('ocfl_export')->error('Failed to mark OCFL object as deleted for node @nid: @message', [
      '@nid' => $node->id(),
      '@message' => $e->getMessage(),
    ]);
  }
}

/**
 * Helper function to save node to OCFL storage.
 */
function _ocfl_export_save_node(NodeInterface $node): void {
  $config = \Drupal::config('ocfl_export.settings');

  if (!$config->get('auto_export_enabled')) {
    return;
  }

  $content_types = $config->get('content_types') ?: [];
  if (!empty($content_types) && !in_array($node->bundle(), $content_types, TRUE)) {
    return;
  }

  try {
    /** @var \Drupal\ocfl_export\NodeSerializerService $serializer */
    $serializer = \Drupal::service('ocfl_export.node_serializer');
    /** @var \Drupal\ocfl_export\OcflStorageService $storage */
    $storage = \Drupal::service('ocfl_export.storage');

    $data = $serializer->serialize($node);
    $storage->saveObject($node->uuid(), $data);
  }
  catch (\Exception $e) {
    \Drupal::logger('ocfl_export')->error('Failed to export node @nid to OCFL: @message', [
      '@nid' => $node->id(),
      '@message' => $e->getMessage(),
    ]);
  }
}

/**
 * Implements hook_media_insert().
 */
function ocfl_export_media_insert(MediaInterface $media): void {
  _ocfl_export_save_media($media);
}

/**
 * Implements hook_media_update().
 */
function ocfl_export_media_update(MediaInterface $media): void {
  _ocfl_export_save_media($media);
}

/**
 * Implements hook_media_delete().
 */
function ocfl_export_media_delete(MediaInterface $media): void {
  $config = \Drupal::config('ocfl_export.settings');

  if (!$config->get('auto_export_media_enabled')) {
    return;
  }

  $media_types = $config->get('media_types') ?: [];
  if (!empty($media_types) && !in_array($media->bundle(), $media_types, TRUE)) {
    return;
  }

  try {
    /** @var \Drupal\ocfl_export\OcflStorageService $storage */
    $storage = \Drupal::service('ocfl_export.storage');
    $storage->markMediaDeleted($media);
  }
  catch (\Exception $e) {
    \Drupal::logger('ocfl_export')->error('Failed to mark OCFL object as deleted for media @mid: @message', [
      '@mid' => $media->id(),
      '@message' => $e->getMessage(),
    ]);
  }
}

/**
 * Helper function to save media to OCFL storage.
 */
function _ocfl_export_save_media(MediaInterface $media): void {
  $config = \Drupal::config('ocfl_export.settings');

  if (!$config->get('auto_export_media_enabled')) {
    return;
  }

  $media_types = $config->get('media_types') ?: [];
  if (!empty($media_types) && !in_array($media->bundle(), $media_types, TRUE)) {
    return;
  }

  try {
    /** @var \Drupal\ocfl_export\MediaSerializerService $serializer */
    $serializer = \Drupal::service('ocfl_export.media_serializer');
    /** @var \Drupal\ocfl_export\OcflStorageService $storage */
    $storage = \Drupal::service('ocfl_export.storage');

    $data = $serializer->serialize($media);
    $storage->saveObject($media->uuid(), $data);
  }
  catch (\Exception $e) {
    \Drupal::logger('ocfl_export')->error('Failed to export media @mid to OCFL: @message', [
      '@mid' => $media->id(),
      '@message' => $e->getMessage(),
    ]);
  }
}

/**
 * Implements hook_node_view().
 */
function ocfl_export_node_view(array &$build, NodeInterface $node, EntityViewDisplayInterface $display, string $view_mode): void {
  if ($view_mode !== 'full') {
    return;
  }

  if (!\Drupal::currentUser()->hasPermission('export ocfl content')) {
    return;
  }

  $build['ocfl_export_status'] = _ocfl_export_build_status_element($node->uuid(), 'node', $node->id());
}

/**
 * Implements hook_media_view().
 */
function ocfl_export_media_view(array &$build, MediaInterface $media, EntityViewDisplayInterface $display, string $view_mode): void {
  if ($view_mode !== 'full') {
    return;
  }

  if (!\Drupal::currentUser()->hasPermission('export ocfl content')) {
    return;
  }

  $build['ocfl_export_status'] = _ocfl_export_build_status_element($media->uuid(), 'media', $media->id());
}

/**
 * Build the OCFL export status render element.
 *
 * @param string $uuid
 *   The entity UUID.
 * @param string $entity_type
 *   The entity type ('node' or 'media').
 * @param int|string $entity_id
 *   The entity ID.
 *
 * @return array
 *   A render array for the OCFL export status.
 */
function _ocfl_export_build_status_element(string $uuid, string $entity_type, int|string $entity_id): array {
  /** @var \Drupal\ocfl_export\OcflStorageService $storage */
  $storage = \Drupal::service('ocfl_export.storage');
  $status = $storage->getExportStatus($uuid);

  $element = [
    '#type' => 'container',
    '#attributes' => [
      'class' => ['ocfl-export-status'],
    ],
    '#weight' => -100,
  ];

  if ($status) {
    $element['info'] = [
      '#type' => 'html_tag',
      '#tag' => 'div',
      '#attributes' => [
        'class' => ['ocfl-export-info'],
      ],
      '#value' => t('OCFL Export: @version (exported @date)', [
        '@version' => $status['version'],
        '@date' => $status['created'] ? \Drupal::service('date.formatter')->format(strtotime($status['created']), 'short') : t('unknown'),
      ]),
    ];

    $element['link'] = [
      '#type' => 'html_tag',
      '#tag' => 'div',
      '#attributes' => [
        'class' => ['ocfl-export-link'],
      ],
      'content' => [
        '#type' => 'link',
        '#title' => t('View exported JSON file'),
        '#url' => Url::fromRoute('ocfl_export.view_export', [
          'entity_type' => $entity_type,
          'uuid' => $uuid,
        ]),
        '#attributes' => [
          'target' => '_blank',
        ],
      ],
    ];
  }
  else {
    $element['info'] = [
      '#type' => 'html_tag',
      '#tag' => 'div',
      '#attributes' => [
        'class' => ['ocfl-export-info', 'ocfl-not-exported'],
      ],
      '#value' => t('Not yet exported to OCFL'),
    ];
  }

  return $element;
}