<?php
/**
 * Observium
 *
 *   This file is part of Observium.
 *
 * @package    observium
 * @subpackage web
 * @copyright  (C) 2006-2013 Adam Armstrong, (C) 2013-2022 Observium Limited
 *
 */

/**
 * Build alert table query from $vars
 * Returns queries for data, an array of parameters and a query to get a count for use in paging
 *
 * @param array $vars
 * @return array ($query, $param, $query_count)
 *
 */
// TESTME needs unit testing
function build_alert_table_query($vars) {
  $where = ' WHERE 1 ';
  // default sort order
  $sort  = ' ORDER BY `device_id`, `alert_test_id`, `entity_type`, `entity_id` DESC ';

  // Loop through the vars building a sql query from relevant values
  foreach ($vars as $var => $value) {
    if (!safe_empty($value)) {
      switch ($var) {
        // Search by device_id if we have a device or device_id
        case 'device_id':
          $where .= generate_query_values($value, 'device_id');
          break;
        case 'entity_type':
          if ($value !== 'all') {
            $where .= generate_query_values($value, 'entity_type');
          }
          break;
        case 'entity_id':
          $where .= generate_query_values($value, 'entity_id');
          break;
        case 'alert_test_id':
          $where .= generate_query_values($value, 'alert_test_id');
          break;
        case 'status':
          if ($value === 'failed_delayed') {
            $where .= " AND `alert_status` IN (0,2)";
          } elseif ($value === 'failed') {
            $where .= " AND `alert_status` IN (0)";
          } elseif ($value === 'suppressed') {
            $where .= " AND `alert_status` = 3";
          }
          break;
        case 'sort':
          if ($value === 'changed') {
	          $sort = ' ORDER BY `last_changed` DESC ';
          } elseif ($value === 'device') {
            // fix this to sort by hostname
	          $sort = ' ORDER BY `device_id` ';
          }
          break;
      }
    }
  }

  // Permissions query
  $query_permitted = generate_query_permitted(array('device', 'alert'), array('hide_ignored' => TRUE));

  // Base query
  $query = 'FROM `alert_table` ';
  //$query .= 'LEFT JOIN `alert_table-state` USING(`alert_table_id`) ';
  $query .= $where . $query_permitted;

  // Build the query to get a count of entries
  $query_count = 'SELECT COUNT(`alert_table_id`) '.$query;

  // Build the query to get the list of entries
  $query = 'SELECT * '.$query;
  //$query .= ' ORDER BY `device_id`, `alert_test_id`, `entity_type`, `entity_id` DESC ';
  $query .= $sort;

  if (isset($vars['pagination']) && $vars['pagination']) {
    pagination($vars, 0, TRUE); // Get default pagesize/pageno
    $vars['start'] = $vars['pagesize'] * $vars['pageno'] - $vars['pagesize'];
    $query .= 'LIMIT '.$vars['start'].','.$vars['pagesize'];
  }

  return array($query, [], $query_count);
}

/**
 * Display alert_table entries.
 *
 * @param array $vars
 * @return void
 *
 */
function print_alert_table($vars) {
  global $alert_rules, $config;

  // This should be set outside, but do it here if it isn't
  if (!is_array($alert_rules)) { $alert_rules = cache_alert_rules(); }
  /// WARN HERE

  if (isset($vars['device']) && !isset($vars['device_id'])) { $vars['device_id'] = $vars['device']; }
  if (isset($vars['entity']) && !isset($vars['entity_id'])) { $vars['entity_id'] = $vars['entity']; }

  // Short? (no pagination, small out)
  $short = (isset($vars['short']) && $vars['short']);


  list($query, $param, $query_count) = build_alert_table_query($vars);

  // Fetch alerts
  $count  = dbFetchCell($query_count, $param);
  $alerts = dbFetchRows($query, $param);

  // Set which columns we're going to show.
  // We hide the columns that have been given as search options via $vars
  $list = array('device_id' => FALSE, 'entity_id' => FALSE, 'entity_type' => FALSE, 'alert_test_id' => FALSE);
  foreach ($list as $argument => $nope) {
    if (!isset($vars[$argument]) || empty($vars[$argument]) || $vars[$argument] === "all") { $list[$argument] = TRUE; }
  }

  if ($vars['format'] !== "condensed") {
    $list['checked'] = TRUE;
    $list['changed'] = TRUE;
    $list['alerted'] = TRUE;
  }

  if ($vars['short']) {
    $list['checked'] = FALSE;
    $list['alerted'] = FALSE;
  }

  // Hide device if we know entity_id
  if (isset($vars['entity_id'])) { $list['device_id'] = FALSE; }
  // Hide entity_type if we know the alert_test_id
  if (isset($vars['alert_test_id']) || TRUE) { $list['entity_type'] = FALSE; } // Hide entity types in favour of icons to save space

  if ($vars['pagination'] && !$short)
  {
    $pagination_html = pagination($vars, $count);
    echo $pagination_html;
  }

  echo generate_box_open($vars['header']);

  echo '<table class="table table-condensed  table-striped  table-hover">' ;

  if (!get_var_true($vars['no_header'])) {
    echo '
  <thead>
    <tr>
      <th class="state-marker"></th>
      <th style="width: 1px;"></th>';

    if ($list['device_id']) {
      echo('      <th style="width: 15%">Device</th>');
    }
    if ($list['entity_type']) {
      echo('      <th style="width: 10%">Type</th>');
    }
    if ($list['entity_id']) {
      echo('      <th style="">Entity</th>');
    }
    if ($list['alert_test_id']) {
      echo('      <th style="min-width: 15%;">Alert</th>');
    }

    echo '
      <th style="width: 100px;">Status</th>';

    if ($list['checked']) {
      echo '      <th style="width: 95px;">Checked</th>';
    }
    if ($list['changed']) {
      echo '      <th style="width: 95px;">Changed</th>';
    }
    if ($list['alerted']) {
      echo '      <th style="width: 95px;">Alerted</th>';
    }

    echo '    <th style="width: 70px;"></th>
    </tr>
  </thead>';
  }
  echo '<tbody>'.PHP_EOL;

  foreach ($alerts as $alert) {
    // Set the alert_rule from the prebuilt cache array
    $alert_rule = $alert_rules[$alert['alert_test_id']];
    //r($alert_rule);

    $alert['severity'] = $alert_rule['severity'];

    // Process the alert entry, generating colours and classes from the data
    humanize_alert_entry($alert);

    // Get the entity array using the cache
    $entity = get_entity_by_id_cache($alert['entity_type'], $alert['entity_id']);

    $entity_type = entity_type_translate_array($alert['entity_type']);

    // Get the device array using the cache
    $device = device_by_id_cache($alert['device_id']);

    // If our parent is an actual type, we need to use the type
    /* -- Currently unused.
    if(isset($entity_type['parent_type']))
    {
      $parent_entity_type = entity_type_translate_array($entity_type['parent_type']);
      $parent_entity = get_entity_by_id_cache($entity_type['parent_type'], $entity[$entity_type['parent_id_field']]);
    }
    */

    echo('<tr class="'.$alert['html_row_class'].'" style="cursor: pointer;" onclick="openLink(\''.generate_url(array('page' => 'device', 'device' => $device['device_id'], 'tab' => 'alert', 'alert_entry' => $alert['alert_table_id'])).'\')">');
    echo('<td class="state-marker"></td>');
    echo('<td style="width: 1px;"></td>');

    // If we know the device, don't show the device
    if ($list['device_id']) {
      echo('<td><span class="entity-title">'.generate_device_link_short($device).'</span></td>');
    }

    // If we're showing all entity types, print the entity type here
    if ($list['entity_type']) { echo('<td>'.nicecase($alert['entity_type']).'</td>'); }

    // Print a link to the entity
    if ($list['entity_id'])
    {
      echo '<td><span class="entity-title">';

      // If we have a parent type, display it here.
      // FIXME - this is perhaps messy. Find a better way and a better layout. We can't have a new table column because it would be empty 90% of the time!
      if (isset($entity_type['parent_type']))
      {
        echo '  <i class="' . $config['entities'][$entity_type['parent_type']]['icon'] . '"></i> '.generate_entity_link($entity_type['parent_type'], $entity[$entity_type['parent_id_field']]).'</span> - ';
      }
      echo '  <i class="' . $config['entities'][$alert['entity_type']]['icon'] . '"></i> '.generate_entity_link($alert['entity_type'], $alert['entity_id'], NULL, NULL, TRUE, $short).'</span>';
      echo '</td>';
    }

    // Print link to the alert rule page
    if ($list['alert_test_id'])
    {
      echo '<td class="entity"><a href="', generate_url(array('page' => 'alert_check', 'alert_test_id' => $alert_rule['alert_test_id'])), '">', escape_html($alert_rule['alert_name']), '</a></td>';
    }

    echo('<td>');
    echo('<span class="label label-'.($alert['html_row_class'] !== 'up' ? $alert['html_row_class'] : 'success').'">' . generate_tooltip_link('', $alert['status'], '<div class="small" style="max-width: 500px;"><strong>'.$alert['last_message'].'</strong></div>', $alert['alert_class']) . '</span>');
    echo('</td>');


    // echo('<td class="'.$alert['class'].'">'.$alert['last_message'].'</td>');

    if ($list['checked'])     { echo('<td>'.generate_tooltip_link('', $alert['checked'], format_unixtime($alert['last_checked'], 'r')).'</td>'); }
    if ($list['changed'])     { echo('<td>'.generate_tooltip_link('', $alert['changed'], format_unixtime($alert['last_changed'], 'r')).'</td>'); }
    if ($list['alerted'])     { echo('<td>'.generate_tooltip_link('', $alert['alerted'], format_unixtime($alert['last_alerted'], 'r')).'</td>'); }
    echo('<td>');

    // This stuff should go in an external entity popup in the future.

    $state = safe_json_decode($alert['state']);

    $alert['state_popup'] = '';

    if (safe_count($state['failed'])) {
      $alert['state_popup'] .= generate_box_open(array('title' => 'Failed Tests')); //'<h4>Failed Tests</h4>';

      $alert['state_popup'] .= '<table style="min-width: 400px;" class="table   table-striped table-condensed">';
      $alert['state_popup'] .= '<thead><tr><th>Metric</th><th>Cond</th><th>Value</th><th>Measured</th></tr></thead>';

      foreach($state['failed'] as $test) {
        $metric_def = $config['entities'][$alert['entity_type']]['metrics'][$test['metric']];

        $format = NULL;
        $symbol = '';
        if (!safe_empty($test['value'])) {
          if (isset($metric_def['format'])) {
            $format = isset($entity[$metric_def['format']]) ? $entity[$metric_def['format']] : $metric_def['format'];
          }
          if (isset($metric_def['symbol'])) {
            $symbol = isset($entity[$metric_def['symbol']]) ? $entity[$metric_def['symbol']] : $metric_def['symbol'];
          }
        }

        $alert['state_popup'] .= '<tr><td><strong>'.$test['metric'].'</strong></td><td>'.$test['condition'].'</td><td>'.
                                 format_value($test['value'], $format).$symbol.'</td><td><i class="red">'.
                                 format_value($state['metrics'][$test['metric']], $format).$symbol.'</i></td></tr>';
      }
      $alert['state_popup'] .= '</table>';
      $alert['state_popup'] .= generate_box_close();
    }

    $alert['state_popup'] .= generate_entity_popup_graphs($alert, array('entity_type' => 'alert_entry'));

    // Print (i) icon with popup of state.
    echo(overlib_link('', get_icon('info-sign', 'text-primary'), $alert['state_popup'], NULL));

    echo('&nbsp;&nbsp;<a href="'.generate_url([ 'page' => 'device', 'device' => $device['device_id'], 'tab' => 'alert', 'alert_entry' => $alert['alert_table_id'] ]) . '">' .
         get_icon('edit', 'text-muted') . '</a>');
    //echo '&nbsp;&nbsp;<a onclick="alert_ignore_until_ok('.$alert['alert_table_id'].')"><i class="icon-pause text-warning"></i></a>';

    echo '&nbsp;&nbsp;';

    $form = [
      'type'       => 'simple',
      //'userlevel'  => 10,          // Minimum user level for display form
      'id'         => 'alert_entry_ignore_until_ok_'.$alert['alert_table_id'],
      'style'      => 'display:inline;',
    ];

    $form['row'][0]['form_alert_table_id'] = [
      'type'        => 'hidden',
      'value'       => $alert['alert_table_id']
    ];

    $form['row'][99]['action'] = [
      'type'        => 'submit',
      'icon_only'   => TRUE, // hide button styles
      'name'        => '',
      'readonly'    => get_var_true($alert['alert_status'], '3'), // alert_status == 3 mean suppressed
      'icon'        => get_var_true($alert['alert_status'], '3') ? 'icon-ok-circle text-muted' : 'icon-ok-sign text-muted',
      // confirmation dialog
      'attribs'     => [
        'data-toggle'            => 'confirm', // Enable confirmation dialog
        'data-confirm-placement' => 'left',
        'data-confirm-content'   => 'Ignore until ok?',
        //'data-confirm-content' => '<div class="alert alert-warning"><h4 class="alert-heading"><i class="icon-warning-sign"></i> Warning!</h4>
        //                           This association will be deleted!</div>'),
      ],
      'value'       => 'alert_entry_ignore_until_ok'
    ];

    // Only show ignore-until button if userlevel is above 8
    if ($_SESSION['userlevel'] >= 8) {
      print_form($form);
      unset($form);
    }

    echo('</td>');
    echo('</tr>');

  }

  echo '  </tbody>'.PHP_EOL;
  echo '</table>'.PHP_EOL;

  echo generate_box_close();

  if ($vars['pagination'] && !$short)
  {
    echo $pagination_html;
  }
}

// EOF