<?php

/**
 * @file
 * Implementation of Roblib search for searching several targets.
 */
require_once dirname(__FILE__) . '/includes/rest/EBSCOConnector.php';
require_once dirname(__FILE__) . '/includes/rest/EBSCOResponse.php';
require_once dirname(__FILE__) . '/includes/rest/EBSCOConnector.php';

/**
 * Implements hook_boot().
 * @global type $conf
 */
function roblib_search_eds_boot() {
  /* below is an example from islandora_solr module for internationalization
   *  global $conf;

    // Allow i18n, by using multilingual variables.
    if (module_exists('i18n')) {
    $vars = array(
    'islandora_solr_facets',
    'islandora_solr_result_fields',
    'islandora_solr_searchterms'
    );

    if (isset($conf['i18n_variables']) && is_array($conf['i18n_variables'])) {
    $conf['i18n_variables'] = array_merge($vars, $conf['i18n_variables']);
    }
    else {
    $conf['i18n_variables'] = $vars;
    }
    } */
}

/**
 * Implements hook_menu().
 */
function roblib_search_eds_menu() {
  $items = array();

  $items['admin/roblib_search/eds_search'] = array(
    'title' => 'EDS search Target configuration',
    'description' => 'Configuration for the Roblib evergreen search target',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('roblib_search_eds_config_form'),
    'access arguments' => array('access administration pages'),
    'type' => MENU_NORMAL_ITEM,
  );

  $items['roblib_search/eds/ajax/%'] = array(
    'title' => 'eds ajax',
    'page callback' => 'roblib_search_eds_ajax',
    'page arguments' => array(3),
    'type' => MENU_CALLBACK,
    'access arguments' => array('search roblib eds'),
  );

  $items['roblib_search/eds/info'] = array(
    'title' => 'eds info',
    'page callback' => 'roblib_search_eds_info',
    'type' => MENU_CALLBACK,
    'access arguments' => array('search roblib eds'),
  );

  return $items;
}

function roblib_search_eds_info() {
  $config = roblib_search_eds_build_config_arr();
  $eds_api = new EBSCOAPI($config);  
  $output = $eds_api->getInfo();
  print json_encode($output);
  exit();
}

function roblib_search_eds_config_form($form, &$form_state) {

  $form['roblib_search_eds_rest_url'] = array(
    '#type' => 'textfield',
    '#title' => t('EDS Rest endpoint'),
    '#default_value' => variable_get('roblib_search_eds_rest_url', 'http://eds-api.ebscohost.com/edsapi/rest'),
    '#description' => t('The base EDS URL, for example http://eds-api.ebscohost.com/edsapi/rest'),
    '#required' => TRUE,
  );
  $form['roblib_search_eds_auth_url'] = array(
    '#type' => 'textfield',
    '#title' => t('EDS Auth endpoint'),
    '#default_value' => variable_get('roblib_search_eds_auth_url', 'https://eds-api.ebscohost.com/Authservice/rest'),
    '#description' => t('The EDS Auth endpoint, for example https://eds-api.ebscohost.com/Authservice/rest'),
    '#required' => TRUE,
  );

  $form['roblib_search_eds_user'] = array(
    '#type' => 'textfield',
    '#title' => t('EDS user'),
    '#default_value' => variable_get('roblib_search_eds_user', 'edsusername'),
    '#description' => t('EDS user, for example username'),
    '#required' => TRUE,
  );

  $form['roblib_search_eds_pass'] = array(
    '#type' => 'textfield',
    '#title' => t('EDS password'),
    '#default_value' => variable_get('roblib_search_eds_pass', 'edspassword'),
    '#description' => t('EDS password, for example password'),
    '#required' => TRUE,
  );

  $form['roblib_search_eds_profile'] = array(
    '#type' => 'textfield',
    '#title' => t('EDS profile'),
    '#default_value' => variable_get('roblib_search_eds_profile', 'edsapi'),
    '#description' => t('EDS profile, for example edsapi'),
    '#required' => TRUE,
  );

  $form['roblib_search_eds_num_results'] = array(
    '#type' => 'textfield',
    '#title' => t('Number of results to return'),
    '#default_value' => variable_get('roblib_search_eds_num_results', '5'),
    '#description' => t('The number of results to display in the Bento box'),
    '#required' => TRUE,
  );


  return system_settings_form($form);
}

/**
 * Implements hook_permission().
 */
function roblib_search_eds_permission() {
  return array(
    'search roblib eds' => array(
      'title' => t('Search the eds target'),
      'description' => t('Search oblib eds target. This permission exposes the search blocks and allows you to see search results.'),
    ),
    'administer roblib search eds' => array(
      'title' => t('Administer Roblib Search EDS'),
      'description' => t('Administer settings for the Roblib eds search client.'),
    ),
  );
}

/**
 * Implements hook_theme().
 */
function roblib_search_eds_theme() {
  // set path
  $path = drupal_get_path('module', 'roblib_search_eds');
  $file = 'theme.inc';

  return array(
    // results page
    'roblib_search_eds' => array(
      'path' => $path . '/theme',
      'file' => $file,
      'template' => 'roblib-search-eds',
      'variables' => array('results' => NULL),
    )
  );
}

function roblib_search_eds_block_info() {

  $blocks['roblib_search_eds_results'] = array(
    // info: The name of the block.
    'info' => t('EDS Search Results block'),
    // Block caching options (per role, per user, etc.)
    'cache' => DRUPAL_CACHE_PER_ROLE, // default
  );

  return $blocks;
}

function roblib_search_eds_block_view($delta = '') {
  //The $delta parameter tells us which block is being requested.
  switch ($delta) {
    case 'roblib_search_eds_results':
      // The subject is displayed at the top of the block. Note that it
      // should be passed through t() for translation. The title configured
      // for the block using Drupal UI supercedes this one.
      $block['subject'] = t('EDS Results');
      // The content of the block is typically generated by calling a custom
      // function.
      // $block['content'] = roblib_search_eds_get_results();
      $block['content'] = theme('roblib_search_eds', array('results' => NULL)); //we will get the results via javascript
      break;
  }
  return $block;
}

function roblib_search_eds_ajax($query) {
  print roblib_search_eds_get_results($query);
  exit();
}

/**
 * 
 * @param string $query
 * @return string
 *   json string
 */
function roblib_search_eds_get_results($query = NULL) {
  drupal_add_css(drupal_get_path('module', 'roblib_search_eds') . '/css/roblib_search_eds.theme.css');

  // Url parameters.
  if (!isset($query)) {
    if (isset($_GET['roblib_query'])) {
      $query = $_GET['roblib_query'];
    }
    else {
      return '';
    }
  }

  $config = roblib_search_eds_build_config_arr();
  /*$config['user'] = variable_get('roblib_search_eds_user', 'edsusername');
  $config['pass'] = variable_get('roblib_search_eds_pass', 'edspassword');
  $config['profile'] = variable_get('roblib_search_eds_profile', 'edsapi');
  $config['auth_url'] = variable_get('roblib_search_eds_auth_url', 'https://eds-api.ebscohost.com/Authservice/rest');
  $config['rest_url'] = variable_get('roblib_search_eds_rest_url', 'http://eds-api.ebscohost.com/edsapi/rest');*/
  $eds_api = new EBSCOAPI($config);
  $number_per_page = variable_get('roblib_search_eds_num_results', '5');
  $query = urlencode($query);
  $params = "query=AND,$query&includefacets=n&resultsperpage=$number_per_page";
  $output = $eds_api->apiSearch($params);
  return json_encode($output);
}

function roblib_search_eds_build_config_arr() {
  $config = array();
  $config['user'] = variable_get('roblib_search_eds_user', 'edsusername');
  $config['pass'] = variable_get('roblib_search_eds_pass', 'edspassword');
  $config['profile'] = variable_get('roblib_search_eds_profile', 'edsapi');
  $config['auth_url'] = variable_get('roblib_search_eds_auth_url', 'https://eds-api.ebscohost.com/Authservice/rest');
  $config['rest_url'] = variable_get('roblib_search_eds_rest_url', 'http://eds-api.ebscohost.com/edsapi/rest');
  return $config;
}

/**
 * Implements hook_help().
 *
 * @param type $path
 * @param type $arg
 * @return type
 */
function roblib_search_eds_help($path, $arg) {
  switch ($path) {
    case 'admin/help#roblib_search_eds':
      return t(
              '<p>
         provides a target for the Roblib search module.  This target uses javascript 
         to render the results. 
         </p>'
      );
  }
}