<?php declare(strict_types=1);
/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PHPUnit\Event;

use const PHP_VERSION;
use function assert;
use function interface_exists;
use function version_compare;
use PHPUnit\Event\Telemetry\HRTime;
use PHPUnit\Event\Telemetry\Php81GarbageCollectorStatusProvider;
use PHPUnit\Event\Telemetry\Php83GarbageCollectorStatusProvider;

/**
 * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
 *
 * @internal This class is not covered by the backward compatibility promise for PHPUnit
 */
final class Facade
{
    private static ?self $instance = null;
    private Emitter $emitter;
    private ?TypeMap $typeMap                         = null;
    private ?DeferringDispatcher $deferringDispatcher = null;
    private bool $sealed                              = false;

    public static function instance(): self
    {
        if (self::$instance === null) {
            self::$instance = new self;
        }

        return self::$instance;
    }

    public static function emitter(): Emitter
    {
        return self::instance()->emitter;
    }

    public function __construct()
    {
        $this->emitter = $this->createDispatchingEmitter();
    }

    /**
     * @throws EventFacadeIsSealedException
     * @throws UnknownSubscriberTypeException
     */
    public function registerSubscribers(Subscriber ...$subscribers): void
    {
        foreach ($subscribers as $subscriber) {
            $this->registerSubscriber($subscriber);
        }
    }

    /**
     * @throws EventFacadeIsSealedException
     * @throws UnknownSubscriberTypeException
     */
    public function registerSubscriber(Subscriber $subscriber): void
    {
        if ($this->sealed) {
            throw new EventFacadeIsSealedException;
        }

        $this->deferredDispatcher()->registerSubscriber($subscriber);
    }

    /**
     * @throws EventFacadeIsSealedException
     */
    public function registerTracer(Tracer\Tracer $tracer): void
    {
        if ($this->sealed) {
            throw new EventFacadeIsSealedException;
        }

        $this->deferredDispatcher()->registerTracer($tracer);
    }

    /**
     * @codeCoverageIgnore
     *
     * @noinspection PhpUnused
     */
    public function initForIsolation(HRTime $offset): CollectingDispatcher
    {
        $dispatcher = new CollectingDispatcher;

        $this->emitter = new DispatchingEmitter(
            $dispatcher,
            new Telemetry\System(
                new Telemetry\SystemStopWatchWithOffset($offset),
                new Telemetry\SystemMemoryMeter,
                $this->garbageCollectorStatusProvider(),
            ),
        );

        $this->sealed = true;

        return $dispatcher;
    }

    public function forward(EventCollection $events): void
    {
        $dispatcher = $this->deferredDispatcher();

        foreach ($events as $event) {
            $dispatcher->dispatch($event);
        }
    }

    public function seal(): void
    {
        $this->deferredDispatcher()->flush();

        $this->sealed = true;

        $this->emitter->testRunnerEventFacadeSealed();
    }

    private function createDispatchingEmitter(): DispatchingEmitter
    {
        return new DispatchingEmitter(
            $this->deferredDispatcher(),
            $this->createTelemetrySystem(),
        );
    }

    private function createTelemetrySystem(): Telemetry\System
    {
        return new Telemetry\System(
            new Telemetry\SystemStopWatch,
            new Telemetry\SystemMemoryMeter,
            $this->garbageCollectorStatusProvider(),
        );
    }

    private function deferredDispatcher(): DeferringDispatcher
    {
        if ($this->deferringDispatcher === null) {
            $this->deferringDispatcher = new DeferringDispatcher(
                new DirectDispatcher($this->typeMap()),
            );
        }

        return $this->deferringDispatcher;
    }

    private function typeMap(): TypeMap
    {
        if ($this->typeMap === null) {
            $typeMap = new TypeMap;

            $this->registerDefaultTypes($typeMap);

            $this->typeMap = $typeMap;
        }

        return $this->typeMap;
    }

    private function registerDefaultTypes(TypeMap $typeMap): void
    {
        $defaultEvents = [
            Application\Started::class,
            Application\Finished::class,

            Test\DataProviderMethodCalled::class,
            Test\DataProviderMethodFinished::class,
            Test\MarkedIncomplete::class,
            Test\AfterLastTestMethodCalled::class,
            Test\AfterLastTestMethodFinished::class,
            Test\AfterTestMethodCalled::class,
            Test\AfterTestMethodFinished::class,
            Test\BeforeFirstTestMethodCalled::class,
            Test\BeforeFirstTestMethodErrored::class,
            Test\BeforeFirstTestMethodFinished::class,
            Test\BeforeTestMethodCalled::class,
            Test\BeforeTestMethodFinished::class,
            Test\ComparatorRegistered::class,
            Test\ConsideredRisky::class,
            Test\DeprecationTriggered::class,
            Test\Errored::class,
            Test\ErrorTriggered::class,
            Test\Failed::class,
            Test\Finished::class,
            Test\NoticeTriggered::class,
            Test\Passed::class,
            Test\PhpDeprecationTriggered::class,
            Test\PhpNoticeTriggered::class,
            Test\PhpunitDeprecationTriggered::class,
            Test\PhpunitErrorTriggered::class,
            Test\PhpunitWarningTriggered::class,
            Test\PhpWarningTriggered::class,
            Test\PostConditionCalled::class,
            Test\PostConditionFinished::class,
            Test\PreConditionCalled::class,
            Test\PreConditionFinished::class,
            Test\PreparationStarted::class,
            Test\Prepared::class,
            Test\PreparationFailed::class,
            Test\PrintedUnexpectedOutput::class,
            Test\Skipped::class,
            Test\WarningTriggered::class,

            Test\MockObjectCreated::class,
            Test\MockObjectForAbstractClassCreated::class,
            Test\MockObjectForIntersectionOfInterfacesCreated::class,
            Test\MockObjectForTraitCreated::class,
            Test\MockObjectFromWsdlCreated::class,
            Test\PartialMockObjectCreated::class,
            Test\TestProxyCreated::class,
            Test\TestStubCreated::class,
            Test\TestStubForIntersectionOfInterfacesCreated::class,

            TestRunner\BootstrapFinished::class,
            TestRunner\Configured::class,
            TestRunner\EventFacadeSealed::class,
            TestRunner\ExecutionAborted::class,
            TestRunner\ExecutionFinished::class,
            TestRunner\ExecutionStarted::class,
            TestRunner\ExtensionLoadedFromPhar::class,
            TestRunner\ExtensionBootstrapped::class,
            TestRunner\Finished::class,
            TestRunner\Started::class,
            TestRunner\DeprecationTriggered::class,
            TestRunner\WarningTriggered::class,
            TestRunner\GarbageCollectionDisabled::class,
            TestRunner\GarbageCollectionTriggered::class,
            TestRunner\GarbageCollectionEnabled::class,

            TestSuite\Filtered::class,
            TestSuite\Finished::class,
            TestSuite\Loaded::class,
            TestSuite\Skipped::class,
            TestSuite\Sorted::class,
            TestSuite\Started::class,
        ];

        foreach ($defaultEvents as $eventClass) {
            $subscriberInterface = $eventClass . 'Subscriber';

            assert(interface_exists($subscriberInterface));

            $typeMap->addMapping($subscriberInterface, $eventClass);
        }
    }

    private function garbageCollectorStatusProvider(): Telemetry\GarbageCollectorStatusProvider
    {
        if (version_compare(PHP_VERSION, '8.3.0', '>=')) {
            return new Php83GarbageCollectorStatusProvider;
        }

        // @codeCoverageIgnoreStart
        return new Php81GarbageCollectorStatusProvider;
        // @codeCoverageIgnoreEnd
    }
}

.NET Framework

Project Request

ProjectC

Vehicle Maintenance

Movie Navigator

Customers Exchange

ATM

.NET Core

Mail Daemon

Custom

Buns of code

PHP

Mediabox

Loan Castle

Content Management

Laravel

Phone Check

Frontend

Forex Wall

Business projects

Certification Center

Amerikas Auto

Pet projects

Geolocation Assistant

Web Dynamics

Blackball

Good old times

DOS Clock

BrainOut

Airport Administrator

Atomizer

Mediabox