class BlackfireDumper

final class BlackfireDumper {
    public function dump(Profile $profile) : string {
        $data = [];
        $this->dumpProfile('main()', $profile, $data);
        $this->dumpChildren('main()', $profile, $data);
        $start = \sprintf('%f', microtime(true));
        $str = <<<EOF
file-format: BlackfireProbe
cost-dimensions: wt mu pmu
request-start: {<span class="php-variable">$start</span>}


EOF;
        foreach ($data as $name => $values) {
            $str .= "{$name}//{$values['ct']} {$values['wt']} {$values['mu']} {$values['pmu']}\n";
        }
        return $str;
    }
    private function dumpChildren(string $parent, Profile $profile, &$data) {
        foreach ($profile as $p) {
            if ($p->isTemplate()) {
                $name = $p->getTemplate();
            }
            else {
                $name = \sprintf('%s::%s(%s)', $p->getTemplate(), $p->getType(), $p->getName());
            }
            $this->dumpProfile(\sprintf('%s==>%s', $parent, $name), $p, $data);
            $this->dumpChildren($name, $p, $data);
        }
    }
    private function dumpProfile(string $edge, Profile $profile, &$data) {
        if (isset($data[$edge])) {
            ++$data[$edge]['ct'];
            $data[$edge]['wt'] += floor($profile->getDuration() * 1000000);
            $data[$edge]['mu'] += $profile->getMemoryUsage();
            $data[$edge]['pmu'] += $profile->getPeakMemoryUsage();
        }
        else {
            $data[$edge] = [
                'ct' => 1,
                'wt' => floor($profile->getDuration() * 1000000),
                'mu' => $profile->getMemoryUsage(),
                'pmu' => $profile->getPeakMemoryUsage(),
            ];
        }
    }

}