<?php
if (!defined('PHPWG_ROOT_PATH'))
{
  die('Hacking attempt!');
}

function bratonien_tools_nc_connector_create_local_api_first()
{
  $required = array(
    'nc_name' => 'Name',
    'nc_host' => 'PostgreSQL-Host',
    'nc_database' => 'Datenbank',
    'nc_user' => 'Reader-Benutzer',
    'nc_db_password' => 'Reader-Passwort',
    'nc_source_view' => 'Source-View',
    'nc_activity_view' => 'Activity-View',
    'nc_gallery_root' => 'Galerie-Pfad',
  );

  foreach ($required as $field => $label)
  {
    if (trim((string)($_POST[$field] ?? '')) === '')
    {
      throw new RuntimeException($label.' fehlt.');
    }
  }

  $fallback_user = trim((string)($_POST['nc_piwigo_user'] ?? ''));
  $fallback_password = (string)($_POST['nc_piwigo_password'] ?? '');
  if (($fallback_user === '') !== ($fallback_password === ''))
  {
    throw new RuntimeException('Fallback-Benutzer und Fallback-Passwort muessen entweder beide angegeben oder beide leer gelassen werden.');
  }

  $api = bratonien_tools_nc_api_credentials();
  if (($api['key_id'] ?? '') === '' && $fallback_user === '')
  {
    throw new RuntimeException('Es ist weder ein gespeicherter Piwigo-API-Zugang noch ein Benutzername/Passwort-Fallback vorhanden.');
  }

  $port = (int)($_POST['nc_port'] ?? 5432);
  if ($port < 1 || $port > 65535)
  {
    throw new RuntimeException('Ungueltiger PostgreSQL-Port.');
  }

  $gallery_root = rtrim(trim((string)$_POST['nc_gallery_root']), '/');
  if (strpos($gallery_root, './') === 0)
  {
    $piwigo_root = realpath(PHPWG_ROOT_PATH);
    if ($piwigo_root === false)
    {
      throw new RuntimeException('Piwigo-Stammverzeichnis konnte nicht aufgelöst werden.');
    }
    $gallery_root = rtrim($piwigo_root, '/').'/'.ltrim(substr($gallery_root, 2), '/');
  }
  if ($gallery_root === '' || $gallery_root[0] !== '/')
  {
    throw new RuntimeException('Der Galerie-Pfad muss ein absoluter Pfad sein.');
  }

  $config = array(
    'host' => trim((string)$_POST['nc_host']),
    'port' => (string)$port,
    'database' => trim((string)$_POST['nc_database']),
    'user' => trim((string)$_POST['nc_user']),
    'source_view' => trim((string)$_POST['nc_source_view']),
    'activity_view' => trim((string)$_POST['nc_activity_view']),
    'gallery_root' => $gallery_root,
    'state_dir' => '',
    'status_file' => '',
    'quiet_seconds' => max(0, (int)($_POST['nc_quiet_seconds'] ?? 120)),
    'max_wait_seconds' => max(60, (int)($_POST['nc_max_wait_seconds'] ?? 900)),
    'full_sync_seconds' => max(300, (int)($_POST['nc_full_sync_seconds'] ?? 86400)),
    'storages' => bratonien_tools_nc_connector_parse_storages($_POST['nc_storages'] ?? ''),
    'origin' => 'native',
    'piwigo_auth' => 'api-first',
  );

  foreach (array(
    'nextcloud_url' => 'nc_nextcloud_url',
    'showcase_user' => 'nc_showcase_user',
    'nextcloud_access_user' => 'nc_access_user',
    'nextcloud_product' => 'nc_product',
    'nextcloud_version' => 'nc_version',
  ) as $config_key => $post_key)
  {
    $value = trim((string)($_POST[$post_key] ?? ''));
    if ($value !== '')
    {
      $config[$config_key] = $value;
    }
  }

  bratonien_tools_nc_connector_view_name($config['source_view']);
  bratonien_tools_nc_connector_view_name($config['activity_view']);

  $table = bratonien_tools_nc_connector_table();
  bratonien_tools_nc_connector_ensure_table();
  $now = date('Y-m-d H:i:s');
  $connection_key = 'local-'.bin2hex(random_bytes(12));
  $secret_blob = bratonien_tools_nc_connector_encrypt_credentials(
    (string)$_POST['nc_db_password'],
    $fallback_user,
    $fallback_password
  );
  $config_json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
  if (!is_string($config_json))
  {
    throw new RuntimeException('Connector-Konfiguration konnte nicht serialisiert werden.');
  }

  pwg_query("INSERT INTO `$table`
    (connection_key, name, adapter, enabled, takeover_state, config_json, secret_blob, created, updated)
    VALUES ('".pwg_db_real_escape_string($connection_key)."',
      '".pwg_db_real_escape_string(trim((string)$_POST['nc_name']))."',
      'local', 0, 'disabled',
      '".pwg_db_real_escape_string($config_json)."',
      '".pwg_db_real_escape_string($secret_blob)."',
      '".pwg_db_real_escape_string($now)."',
      '".pwg_db_real_escape_string($now)."')");

  $id = (int)pwg_db_insert_id();
  $config['state_dir'] = '/var/lib/bratonien-tools/nc-connector/connection-'.$id;
  $config['status_file'] = $config['state_dir'].'/connector-status.json';
  $config_json = json_encode($config, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
  pwg_query("UPDATE `$table` SET config_json='".pwg_db_real_escape_string($config_json)."' WHERE id=".$id);

  return array(
    'message' => $fallback_user === ''
      ? 'Nextcloud-Verbindung wurde API-first ohne dauerhaft gespeicherten Benutzername/Passwort-Fallback angelegt. Bitte technisch pruefen und danach im LXC aktivieren.'
      : 'Nextcloud-Verbindung wurde API-first mit verschluesseltem Benutzername/Passwort-Fallback angelegt. Bitte technisch pruefen und danach im LXC aktivieren.'
  );
}