<?php
/**
 * @file
 * Contains the functions to send and receive data to/from Relais.
 */

use Drupal\Core\Url;
use Drupal\Core\Link;

function upei_roblib_ill_get_pub_type($genre) {
  switch ($genre) {
    case 'book' :
      return 'B';
    case 'chapter' :
      return 'I';
    default :
      return 'J';
  }
}

/**
 * Submit an ILL AddRequest to relais.
 *
 * @param array $form_state
 *   A drupal form_state array
 * @param string $aid
 *   A relais authentication id (token)
 *
 * @return array|mixed
 */
function upei_roblib_ill_add_request($form_state, $aid) {
  module_load_include('inc', 'upei_roblib_ill', 'includes/db');
  module_load_include('inc', 'upei_roblib_ill', 'includes/utilities');
  $config = \Drupal::config('upei_roblib_ill.settings');
  $url = trim($config->get('ill_add_url'));
  $relais_arr = upei_roblib_ill_build_relais_arr($form_state);
  $relais_json = json_encode($relais_arr);
  $options = [
    'body' => $relais_json,
    'timeout' => 15,
    'headers' => ['Content-Type' => 'application/json'],
  ];
  if (!isset($aid) || is_array($aid)) {
    upei_roblib_ill_log_request($relais_arr, $aid);
    \Drupal::messenger()->addMessage(t('Error retrieving authentication token, @message', ['@message' => $aid['Problem']['Message']]), 'error');
    return ['ConfirmMessage' => t('There was an error processing your request, @msg', ['@msg' => $aid['Problem']['Message']])];
  }
  //$result = drupal_http_request($url . '?aid=' . $aid, $options);
  try {
    $response = \Drupal::httpClient()->post($url . '?aid=' . $aid, $options);
    //$response_data = (string) $response->getBody();
  }
  catch (Exception $e) {
   return ['ConfirmMessage' => 'Error Communicating with Relais, ' . $e->getMessage()];
  }
  $response_arr = json_decode($response->getBody(),TRUE);

  if (!isset($response_arr)) {
    return ['ConfirmMessage' => 'Error Communicating with Relais, no data returned.'];
  }
  $response_arr['ConfirmMessage'] = isset($response_arr['Problem']['ErrorMessage']) ? $response_arr['Problem']['ErrorMessage'] : $response_arr['ConfirmMessage'];
  upei_roblib_ill_log_request($relais_arr, $response_arr);
  return $response_arr;
}

/**
 * @param $form_state
 *
 * @return array
 */
function upei_roblib_ill_build_relais_arr($form_state) {
  module_load_include('inc', 'upei_roblib_ill', 'includes/utilities');
  $storage = $form_state->getStorage();
  $ill_request = $storage['request'];
  $values = $form_state->getValues();
  $config = \Drupal::config('upei_roblib_ill.settings');
  $relais_arr = [
    "SupplyingLibrarySymbol" => $config->get('ill_library_symbol'),
  ];
  $pub_type = upei_roblib_ill_get_pub_type($ill_request['Genre']);
  $relais_arr['BibliographicInfo'] = upei_roblib_ill_clean_array($ill_request);
  $relais_arr['DeliveryAddress'] = upei_roblib_ill_clean_array($values);
  if ($pub_type != 'B') {
    // this is not a book but is a journal or chapter we will send electronically and as copy
    $relais_arr['ElectronicDelivery']['DeliveryAddress'] = $relais_arr['ElectronicDelivery']['MessagingAddress'] =
      $relais_arr['DeliveryAddress']['DeliveryAddress'];
  }
  $request_info = upei_roblib_ill_request_info_array($relais_arr['BibliographicInfo'], $values['notes']);
  $relais_arr['RequestInfo'] = $request_info;
  $relais_arr['PublisherInfo']['PublicationDate'] = isset($ill_request['Date']) ?
    $ill_request['Date'] : '';
  $relais_arr['PublisherInfo']['PublicationType'] = $pub_type;
  return $relais_arr;
}

/**
 * Request an aid from Relais.
 *
 * @param string $barcode
 *   A patron_id, campus_id or barcode to identify a user
 *
 * @return string/array
 *   Returns a Relais authentication id (token) or an array containing the
 *   Relais response error which should include the error message if
 *   authentication fails
 */
function upei_roblib_ill_authenticate($barcode, $surname) {
  //$url = variable_get('upei_roblib_ill_auth_url', 'https://caul-cbua.relais-host.com/portal-service/user/authentication');
  $config = \Drupal::config('upei_roblib_ill.settings');
  $url = $config->get('ill_auth_url');
  $json_arr = [];
  $json_arr['ApiKey'] = $config->get('ill_relais_key');
  $json_arr['UserGroup'] = 'patron';
  $json_arr['LibrarySymbol'] = $config->get('ill_library_symbol');
  $json_arr['PatronId'] = $barcode;
  $request_json = json_encode($json_arr);
  $options = [
    'body' => $request_json,
    'timeout' => 15,
    'headers' => ['Content-Type' => 'application/json'],
  ];
  try {
    $response = \Drupal::httpClient()->post($url, $options);
  }
  catch (Exception $e) {
    $human_readable = '';
    if($e->getCode() == '401') {
      $human_readable = t('There may have been an issue with your Campus ID, '
        . 'Please verify it is correct.  ');
    }
    $response_data['Problem']['Message'] = $e->getMessage();
    $response_data['Problem']['HR_Message'] = upei_roblib_ill_build_err_msg($human_readable);
    return $response_data;
  }

  $response_data = json_decode($response->getBody(),TRUE);
  $status_code = $response->getStatusCode();
  if ($status_code == '200') {
    if (isset($response_data['Problem']) || strtolower($response_data['LastName']) !== strtolower($surname)) {
      $err_message = isset($response_data['Problem']['Message']) ? $response_data['Problem']['Message'] : '';
      $response_data['Problem']['Message'] = upei_roblib_ill_build_err_msg($err_message);
      return $response_data;
    }
    $aid = $response_data['AuthorizationId'];
  }
  return isset($aid) ? $aid : $response_data;
}

function upei_roblib_ill_build_err_msg($msg_from_server) {
  $campus_id = Link::fromTextAndUrl(t('Campus ID'), Url::fromUri('http://www.upei.ca/vpaf/campuscard'));
  //$campus_id = l(t('Campus ID'), 'http://www.upei.ca/vpaf/campuscard');
  $ill_email = Link::fromTextAndUrl('ill@upei.ca', Url::fromUri('mailto:ill@upei.ca'));
  //$ill_email = l(t('ill@upei.ca'), 'mailto:ill@upei.ca');
  $phone = Link::fromTextAndUrl('902-566-0583', Url::fromUri('tel:902-566-0353'));
  //$phone = l(t('902-566-0583'), 'tel:902-566-0353');
  $server_response = !empty($msg_from_server) ? 'Server Response: ' . $msg_from_server : '';
  return t('Oops. Something went wrong.<br />Check the "Your Last Name" and "Your Campus ID" fields - those two need to match what is on file
. (Your @campus_id appears as the NUMBER near the middle of your campus card).  If you do not have a @campus_id, please contact the Robertson Library Service Desk, or,
call @phone.  Note: if you are a student taking online courses only, please email @ill_email.<br />@msg_from_server',
    [
      '@campus_id' => $campus_id->toString(),
      '@ill_email' => $ill_email->toString(),
      '@phone' => $phone->toString(),
      '@msg_from_server' => $server_response,
    ]);
}