<?php

/**
 * @phutil-external-symbol function xhprof_compute_flat_info
 */
final class PhabricatorXHProfProfileSymbolView
  extends PhabricatorXHProfProfileView {

  private $profileData;
  private $symbol;

  public function setProfileData(array $data) {
    $this->profileData = $data;
    return $this;
  }

  public function setSymbol($symbol) {
    $this->symbol = $symbol;
    return $this;
  }

  public function render() {
    DarkConsoleXHProfPluginAPI::includeXHProfLib();

    $data = $this->profileData;

    $GLOBALS['display_calls'] = true;
    $totals = array();
    $flat = xhprof_compute_flat_info($data, $totals);
    unset($GLOBALS['display_calls']);

    $symbol = $this->symbol;

    $children = array();
    $parents = array();
    foreach ($this->profileData as $key => $counters) {
      if (strpos($key, '==>') !== false) {
        list($parent, $child) = explode('==>', $key, 2);
      } else {
        continue;
      }
      if ($parent == $symbol) {
        $children[$key] = $child;
      } else if ($child == $symbol) {
        $parents[$key] = $parent;
      }
    }

    $rows = array();
    $rows[] = array(
      'Metrics for this Call',
      '',
      '',
      '',
    );
    $rows[] = $this->formatRow(
      array(
        $symbol,
        $flat[$symbol]['ct'],
        $flat[$symbol]['wt'],
        1.0,
      ));

    $rows[] = array(
      'Parent Calls',
      '',
      '',
      '',
    );
    foreach ($parents as $key => $name) {
      $rows[] = $this->formatRow(
        array(
          $name,
          $data[$key]['ct'],
          $data[$key]['wt'],
          '',
        ));
    }


    $rows[] = array(
      'Child Calls',
      '',
      '',
      '',
    );
    $child_rows = array();
    foreach ($children as $key => $name) {
      $child_rows[] = array(
        $name,
        $data[$key]['ct'],
        $data[$key]['wt'],
        $data[$key]['wt'] / $flat[$symbol]['wt'],
      );
    }
    $child_rows = isort($child_rows, 2);
    $child_rows = array_reverse($child_rows);
    $rows = array_merge(
      $rows,
      array_map(array($this, 'formatRow'), $child_rows));

    $table = new AphrontTableView($rows);
    $table->setHeaders(
      array(
        'Symbol',
        'Count',
        'Wall Time',
        '%',
      ));
    $table->setColumnClasses(
      array(
        'wide pri',
        'n',
        'n',
        'n',
      ));

    $panel = new AphrontPanelView();
    $panel->setHeader('XHProf Profile');
    $panel->appendChild($table);

    return $panel->render();
  }

  private function formatRow(array $row) {
    return array(
      $this->renderSymbolLink($row[0]),
      number_format($row[1]),
      number_format($row[2]).' us',
      ($row[3] != '' ? sprintf('%.1f%%', 100 * $row[3]) : ''),
    );
  }

}