<?php

namespace PhpBench\Tests\Util;

use DateTime;

use PhpBench\Model\Benchmark;

use PhpBench\Model\Suite;

use RuntimeException;

final class BenchmarkBuilder

{

/**

* @var SubjectBuilder[]

*/

private array $subjectBuilders = [];

public function __construct(private readonly ?SuiteBuilder $suiteBuilder, private readonly string $name)

{

}

public static function create(string $name): self

{

return new self(null, $name);

}

public function subject(string $name): SubjectBuilder

{

$builder = SubjectBuilder::forBenchmarkBuilder($this, $name);

$this->subjectBuilders[] = $builder;

return $builder;

}

public function build(?Suite $suite = null): Benchmark

{

if (null === $suite) {

$suite = new Suite(

'testSuite',

new DateTime()

);

}

$benchmark = new Benchmark($suite, $this->name);

foreach ($this->subjectBuilders as $builder) {

$benchmark->addSubject($builder->build($benchmark));

}

return $benchmark;

}

public function end(): SuiteBuilder

{

if (null === $this->suiteBuilder) {

throw new RuntimeException(

'This benchmark builder was not created by a suite builder, end() cannot return anything'

);

}

return $this->suiteBuilder;

}

public static function forSuiteBuilder(SuiteBuilder $builder, string $name): self

{

return new self($builder, $name);

}

}