<?php
use Redis\Logger\Reader;

/**
 * @file
 * Administrative controllers for the Redis Logger module.
 */

function redis_logger_form_overview($form, $form_state) {
  $redis = Redis_Client::getClient();
  $reader = new Reader($redis);
  $severity_levels = $reader->getSettings()->getSeverityLevels();

  $base_form = $form;
  $form['redis_logger_filter_form'] = _redis_logger_filter_form($base_form, $reader);
  $form['redis_logger_clear_log_form'] = _redis_logger_clear_log_form($base_form);

  $header = array(
    t('Type'),
    t('Level'),
    t('Message template'),
    t('Occurrences'),
  );

  $templates = $reader->getTemplates();
  dsm($templates);
  $regex = $reader->getSettings()->getSplittingRegex();
  $rows = array();
  foreach ($templates as $template) {
    preg_match($regex, $template, $matches);
    list(, $channel, $severity, $template) = $matches;
    $occurrences = l(t('Occurrences'), 'admin/reports/redis/logger/' . $template);
    $rows[] = array(
      $channel,
      $severity_levels[$severity],
      $template,
      $occurrences,
    );
  }

  $form['redis_logger_table'] = array(
    '#theme' => 'table',
    '#header' => $header,
    '#rows' => $rows,
    '#attributes' => array('id' => 'admin-dblog'),
    '#empty' => t('No log messages available.'),
  );
  $build['dblog_pager'] = array('#theme' => 'pager');


  return $form;
}

/**
 * TODO implement. Beware of XSS.
 *
 * @param string $template
 *
 * @return string
 */
function redis_logger_page_event($template) {
  return check_plain($template);
}

/**
 * Form constructor for the form that clears out the log.
 *
 * TODO implement.
 *
 * @see dblog_clear_log_submit()
 * @ingroup forms
 */
function _redis_logger_clear_log_form($form) {
  $form['redis_logger_clear'] = array(
    '#type' => 'fieldset',
    '#title' => t('Clear log messages'),
    '#description' => t('NOT IMPLEMENTED YET. This will permanently remove the log messages from the Redis store.'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  );
  $form['redis_logger_clear']['clear'] = array(
    '#type' => 'submit',
    '#value' => t('Clear log messages'),
    '#submit' => array('redis_logger_clear_log_submit'),
  );

  return $form;
}

/**
 * Helper for the Redis logger filter form builder.
 *
 * @param \Redis\Logger\Reader $reader
 *
 * @return array
 */
function _redis_logger_filters(Reader $reader) {
  $filters = array();

  $filters['type'] = array(
    'title' => t('Type'),
    'options' => $reader->getChannels(),
  );

  $filters['severity'] = array(
    'title' => t('Severity'),
    'options' => $reader->getSettings()->getSeverityLevels(),
  );

  return $filters;
}

/**
 * Build the filter form. Shares session status with DBLog.
 *
 * @param array $form
 * @param \Redis\Logger\Reader $reader
 *
 * @return mixed
 */
function _redis_logger_filter_form($form, Reader $reader) {
  $filters = _redis_logger_filters($reader);

  $form['filters'] = array(
    '#type' => 'fieldset',
    '#title' => t('Filter log messages'),
    '#collapsible' => TRUE,
    '#collapsed' => empty($_SESSION['dblog_overview_filter']),
  );
  foreach ($filters as $key => $filter) {
    $form['filters']['status'][$key] = array(
      '#title' => $filter['title'],
      '#type' => 'select',
      '#multiple' => TRUE,
      '#size' => 8,
      '#options' => $filter['options'],
    );
    if (!empty($_SESSION['dblog_overview_filter'][$key])) {
      $form['filters']['status'][$key]['#default_value'] = $_SESSION['dblog_overview_filter'][$key];
    }
  }

  $form['filters']['actions'] = array(
    '#type' => 'actions',
    '#attributes' => array('class' => array('container-inline')),
  );
  $form['filters']['actions']['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Filter'),
  );
  if (!empty($_SESSION['dblog_overview_filter'])) {
    $form['filters']['actions']['reset'] = array(
      '#type' => 'submit',
      '#value' => t('Reset')
    );
  }
  return $form;

}