<?php

namespace Composer\Repository\Vcs;

use Composer\Cache;
use Composer\Config;
use Composer\IO\IOInterface;
use Composer\Pcre\Preg;
use Composer\Util\Http\Response;
use Composer\Util\Perforce;
use Composer\Util\ProcessExecutor;

/**
 * @author Matt Whittom <Matt.Whittom@veteransunited.com>
 */
class PerforceDriver extends VcsDriver
{
	/** @var string */
	protected $depot;

	/** @var string */
	protected $branch;

	/** @var ?Perforce */
	protected $perforce = null;


	/**
	 * @inheritDoc
	 */
	public function initialize(): void
	{
		$this->depot = $this->repoConfig['depot'];
		$this->branch = '';
		if (!empty($this->repoConfig['branch'])) {
		    $this->branch = $this->repoConfig['branch'];
		}

		$this->initPerforce($this->repoConfig);
		$this->perforce->p4Login();
		$this->perforce->checkStream();

		$this->perforce->writeP4ClientSpec();
		$this->perforce->connectClient();
	}


	/**
	 * @param array<string, mixed> $repoConfig
	 */
	private function initPerforce(array $repoConfig): void
	{
		if (!empty($this->perforce)) {
		    return;
		}

		if (!Cache::isUsable($this->config->get('cache-vcs-dir'))) {
		    throw new \RuntimeException('PerforceDriver requires a usable cache directory, and it looks like you set it to be disabled');
		}

		$repoDir = $this->config->get('cache-vcs-dir') . '/' . $this->depot;
		$this->perforce = Perforce::create($repoConfig, $this->getUrl(), $repoDir, $this->process, $this->io);
	}


	/**
	 * @inheritDoc
	 */
	public function getFileContent(string $file, string $identifier): ?string
	{
		return $this->perforce->getFileContent($file, $identifier);
	}


	/**
	 * @inheritDoc
	 */
	public function getChangeDate(string $identifier): ?\DateTimeImmutable
	{
		return null;
	}


	/**
	 * @inheritDoc
	 */
	public function getRootIdentifier(): string
	{
		return $this->branch;
	}


	/**
	 * @inheritDoc
	 */
	public function getBranches(): array
	{
		return $this->perforce->getBranches();
	}


	/**
	 * @inheritDoc
	 */
	public function getTags(): array
	{
		return $this->perforce->getTags();
	}


	/**
	 * @inheritDoc
	 */
	public function getDist(string $identifier): ?array
	{
		return null;
	}


	/**
	 * @inheritDoc
	 */
	public function getSource(string $identifier): array
	{
		return [
		    'type' => 'perforce',
		    'url' => $this->repoConfig['url'],
		    'reference' => $identifier,
		    'p4user' => $this->perforce->getUser(),
		];
	}


	/**
	 * @inheritDoc
	 */
	public function getUrl(): string
	{
		return $this->url;
	}


	/**
	 * @inheritDoc
	 */
	public function hasComposerFile(string $identifier): bool
	{
		$composerInfo = $this->perforce->getComposerInformation('//' . $this->depot . '/' . $identifier);

		return !empty($composerInfo);
	}


	/**
	 * @inheritDoc
	 */
	public function getContents(string $url): Response
	{
		throw new \BadMethodCallException('Not implemented/used in PerforceDriver');
	}


	/**
	 * @inheritDoc
	 */
	public static function supports(IOInterface $io, Config $config, string $url, bool $deep = false): bool
	{
		if ($deep || Preg::isMatch('#\b(perforce|p4)\b#i', $url)) {
		    return Perforce::checkServerExists($url, new ProcessExecutor($io));
		}

		return false;
	}


	/**
	 * @inheritDoc
	 */
	public function cleanup(): void
	{
		$this->perforce->cleanupClientSpec();
		$this->perforce = null;
	}


	public function getDepot(): string
	{
		return $this->depot;
	}


	public function getBranch(): string
	{
		return $this->branch;
	}
}
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