<?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_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 eds 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/articles/%'] = array(
    'title' => 'eds ajax',
    'page callback' => 'roblib_search_eds_articles',
    '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_guest'] = array(
    '#type' => 'textfield',
    '#title' => t('EDS Guest access'),
    '#default_value' => variable_get('roblib_search_eds_guest', 'y'),
    '#description' => t('EDS Guest access, y = guest access, n = not a guest'),
    '#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,
  );
  $form['roblib_search_eds_article_limiters'] = array(
    '#type' => 'textarea',
    '#title' => t('The limiters for Article searches'),
    '#default_value' => variable_get('roblib_search_eds_article_limiters',
      'AND (PT Article OR PT Magazines OR PT News OR PT Academic Journals OR PT Conference Materials)'),
    '#description' => t('Specify the Publication Types to use as limiters for Article searches.  Formatted similar to
     AND (PT Article OR PT Magazines OR PT News OR PT Academic Journals OR PT Conference Materials)'),
    '#required' => TRUE,
  );
  $form['roblib_search_eds_book_limiters'] = array(
    '#type' => 'textarea',
    '#title' => t('The limiters for Books and Media searches'),
    '#default_value' => variable_get('roblib_search_eds_book_limiters',
      'AND (PT Book OR PT Video OR PT Audio)'),
    '#description' => t('Specify the Publication Types to use as limiters for Article searches.  Formatted similar to
     AND (PT Book OR PT Video OR PT Audio'),
    '#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),
    ),
    'roblib_search_eds_articles' => array(
      'path' => $path . '/theme',
      'file' => $file,
      'template' => 'roblib-search-eds-articles',
      'variables' => array('results' => NULL),
    ),
  );
}

function roblib_search_eds_preprocess_panels_pane(&$variables, $hook){
  if($variables['pane']->subtype == 'roblib_search_eds-roblib_search_eds_articles'){
    $variables['title_prefix'] = '<div class="roblib-search-header roblib-search-eds-articles-header">';
    $variables['title_suffix'] ='</div>';
  }
  if($variables['pane']->subtype == 'roblib_search_eds-roblib_search_eds_results'){
    $variables['title_prefix'] = '<div class="roblib-search-header roblib-search-eds-media-header">';
    $variables['title_suffix'] ='</div>';
  }
}

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,
  );
  $blocks['roblib_search_eds_articles'] = array(
    'info' => t('EDS Search Results Articles'),
    'cache' => DRUPAL_CACHE_PER_ROLE,
  );
  return $blocks;
}

function roblib_search_eds_block_view($delta = '') {
  switch ($delta) {
    case 'roblib_search_eds_results':
      $block['subject'] = t('Books & Media');
      $block['content'] = theme('roblib_search_eds', array('results' => NULL));
      break;

    case 'roblib_search_eds_articles':
      $block['subject'] = t('Articles');
      $block['content'] = theme('roblib_search_eds_articles', array('results' => NULL));
      break;

  }
  return $block;
}

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

function roblib_search_eds_articles($query) {
  print roblib_search_eds_get_results($query, 'Articles');
  exit();
}

/**
 *
 * @param string $query
 * @return string
 *   json string
 */
function roblib_search_eds_get_results($query = NULL, $type = 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 '';
    }
  }
  $limiters = '';
  if ($type != NULL) {
    $limiters = roblib_search_eds_get_query_limiters($type);
  }
  $config = roblib_search_eds_build_config_arr();
  $eds_api = new EBSCOAPI($config);
  $number_per_page = variable_get('roblib_search_eds_num_results', '5');
  $query = urlencode($query);
  $query .= $limiters;
  //$params = "query=AND,$query&view=detailed&includefacets=n&$limiters&resultsperpage=$number_per_page";
  $params = "query=AND,$query&view=detailed&includefacets=n&resultsperpage=$number_per_page";
  $output = $eds_api->apiSearch($params);
  //roblib_search_eds_get_detailed_result($output, $query, $eds_api);
  return json_encode($output);
}


/**
 * For each result query ebsco again to get the detailed record.
 *
 * and insert a new DetailedRecord element in each record.
 *
 * @param array $output
 *   The orginal search results array
 * @param string $query
 *   The orginal query
 * @param object $eds_api
 *   an ebco API PHP object
 */
function roblib_search_eds_get_detailed_result(&$output, $query, &$eds_api) {
  foreach ($output['records'] as &$record) {
    $db = $record['DbId'];
    $an = $record['An'];
    $arr = $eds_api->apiRetrieve($an, $db, $query);
    $record['DetailedRecord'] = $arr['Items'];
  }
}

/**
 * Creates the limiter string to append to the end of a query.
 *
 * @param string $type
 *   The type of search we want (Articles or Books)
 *
 * @return string
 *   The limiters to append to the query.
 */
function roblib_search_eds_get_query_limiters($type) {
  $limiters = 'n';
  switch ($type) {
    case 'Articles':
      //$limiters = 'facetfilter=1,SourceType:Magazines,SourceType:News,SourceType:Academic+Journals,SourceType:Conference+Materials';
      $limiters = ' ' . variable_get('roblib_search_eds_article_limiters',
      'AND (PT Article OR PT Magazines OR PT News OR PT Academic Journals OR PT Conference Materials)');
      break;

    case 'Books':
      // $limiters = '+AND+(PT+book)';
      //$limiters = 'facetfilter=1,PublicationType:Books,PublicationType:Audio,PublicationType:Videos';
      $limiters = ' ' . variable_get('roblib_search_eds_book_limiters',
      'AND (PT Book OR PT Video OR PT Audio)');
      break;


  }
  return urlencode($limiters);
}

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>'
      );
  }
}