<?php
declare(strict_types=1);

namespace Kiri\Router;

use Closure;
use Kiri\Di\HotReloadState;
use Kiri\Server\Events\OnWorkerStart;
use Kiri;
use Kiri\Abstracts\CoordinatorManager;
use Kiri\Coordinator;
use Kiri\Router\RouteArtifactState;
use Kiri\Router\Validator\ValidatorMiddleware;
use Kiri\Router\Base\Middleware as MiddlewareManager;
use Kiri\Router\Constrict\RequestMethod;
use Psr\Container\ContainerInterface;
use Psr\Http\Message\ResponseInterface;

/**
 *
 *
 * $component->set([
 *  'request' => [
 *      'middlewares' => []
 *  ]
 * ])
 */
class Router
{


	const array METHODS = [RequestMethod::REQUEST_POST, RequestMethod::REQUEST_GET, RequestMethod::REQUEST_OPTIONS, RequestMethod::REQUEST_DELETE, RequestMethod::REQUEST_PUT, RequestMethod::REQUEST_HEAD];


	/**
	 * @var string
	 */
	private static string $type = ROUTER_TYPE_HTTP;

	private static ?string $currentSourceFile = null;


	/**
	 * @param string $name
	 * @param Closure $closure
	 */
	public static function addServer(string $name, Closure $closure): void
	{
		static::$type = $name;
		$closure();
		static::$type = ROUTER_TYPE_HTTP;
	}


	/**
	 * @param Closure $handler
	 */
	public static function jsonp(Closure $handler): void
	{
		static::$type = 'json-rpc';
		$handler();
		static::$type = ROUTER_TYPE_HTTP;
	}


	/**
	 * @param string $route
	 * @param string $handler
	 *
	 * @throws
	 */
	public static function post(string $route, string $handler): void
	{
		$router = Kiri::getDi()->get(DataGrip::class)->get(static::$type);
		$router->addRoute([RequestMethod::REQUEST_POST], $route, $handler);
	}

	/**
	 * @param string $route
	 * @param string $handler
	 *
	 * @throws
	 */
	public static function get(string $route, string $handler): void
	{
		$router = Kiri::getDi()->get(DataGrip::class)->get(static::$type);
		$router->addRoute([RequestMethod::REQUEST_GET], $route, $handler);
	}


	/**
	 * @param string $route
	 * @param string $handler
	 *
	 * @throws
	 */
	public static function options(string $route, string $handler): void
	{
		$router = Kiri::getDi()->get(DataGrip::class)->get(static::$type);
		$router->addRoute([RequestMethod::REQUEST_OPTIONS], $route, $handler);
	}


	/**
	 * @param string $route
	 * @param string $handler
	 *
	 * @throws
	 */
	public static function any(string $route, string $handler): void
	{
		$router = Kiri::getDi()->get(DataGrip::class)->get(static::$type);
		$router->addRoute(self::METHODS, $route, $handler);
	}

	/**
	 * @param string $route
	 * @param string $handler
	 *
	 * @throws
	 */
	public static function delete(string $route, string $handler): void
	{
		$router = Kiri::getDi()->get(DataGrip::class)->get(static::$type);
		$router->addRoute([RequestMethod::REQUEST_DELETE], $route, $handler);
	}


	/**
	 * @param string $route
	 * @param string $handler
	 *
	 * @throws
	 */
	public static function head(string $route, string $handler): void
	{
		$router = Kiri::getDi()->get(DataGrip::class)->get(static::$type);
		$router->addRoute([RequestMethod::REQUEST_HEAD], $route, $handler);
	}


	/**
	 * @param string $route
	 * @param string $handler
	 *
	 * @throws
	 */
	public static function put(string $route, string $handler): void
	{
		$router = Kiri::getDi()->get(DataGrip::class)->get(static::$type);
		$router->addRoute([RequestMethod::REQUEST_PUT], $route, $handler);
	}


	/**
	 * @param array|RequestMethod $methods
	 * @param string $route
	 * @param string|array $handler
	 */
	public static function addRoute(array|RequestMethod $methods, string $route, string|array $handler): void
	{
		$router = Kiri::getDi()->get(DataGrip::class)->get(static::$type);
		if ($methods instanceof RequestMethod) {
			$methods = [$methods];
		}
		$router->addRoute($methods, $route, $handler);
	}


	/**
	 * @param array $config
	 * @param Closure $closure
	 *
	 * @throws
	 */
	public static function group(array $config, Closure $closure): void
	{
		$router = Kiri::getDi()->get(DataGrip::class)->get(static::$type);

		$router->groupTack[] = $config;

		call_user_func($closure);

		array_pop($router->groupTack);
	}


	/**
	 * @throws
	 */
	public function scan_build_route(): void
	{
		$coordinator = CoordinatorManager::utility(Coordinator::WORKER_START);
		$container = Kiri::getDi();
		$container->get(DataGrip::class)->reset(static::$type);
		$scanner   = $container->get(Kiri\Di\Scanner::class);
		$artifactState = $container->get(RouteArtifactState::class);
		$scanConfig = array_merge(
			config('servers.reload.scan', []),
			config('site.scanner', [])
		);
		$scanner->setConfig($scanConfig);

		$changedFiles = $container->get(HotReloadState::class)->consume();
		$normalizedAppPath = str_replace('\\', '/', APP_PATH . 'app');
		$normalizedRoutePath = str_replace('\\', '/', APP_PATH . 'routes');
		$routeChanged = false;
		$appChangedFiles = [];

		foreach ($changedFiles as $changedFile) {
			if (str_starts_with($changedFile, $normalizedRoutePath . '/')) {
				$routeChanged = true;
				continue;
			}

			if (str_starts_with($changedFile, $normalizedAppPath . '/')) {
				$appChangedFiles[] = $changedFile;
			}
		}

		$usedArtifact = false;
		if (($scanConfig['cache_enabled'] ?? false) && !$routeChanged && $artifactState->has(static::$type)) {
			$artifact = $artifactState->load(static::$type);
			$router = $container->get(DataGrip::class)->get(static::$type);
			$usedArtifact = $router->importArtifact($artifact, $appChangedFiles);
		}

		if (!$usedArtifact) {
			$this->read_dir_file(APP_PATH . 'routes');
		}

		if (!$routeChanged && !empty($appChangedFiles) && ($scanConfig['cache_enabled'] ?? false)) {
			$scanner->scanFiles($appChangedFiles, APP_PATH . 'app/', null, !$usedArtifact);
		} elseif (!$usedArtifact) {
			$scanner->scan(APP_PATH . 'app/');
		} else {
			$scanner->scanFiles([], APP_PATH . 'app/', null, false);
		}
		$this->reset($container);
		$artifactState->store(static::$type, $container->get(DataGrip::class)->get(static::$type)->exportArtifact());

		$coordinator->done();
	}


	/**
	 * @param ContainerInterface $container
	 *
	 * @return void
	 * @throws
	 */
	public function reset(ContainerInterface $container): void
	{
		$router = $container->get(DataGrip::class)->get(static::$type);
		if ((bool)config('servers.reload.scan.prebuild_http_handlers', false)) {
			$router->warmHttpHandlers();
		}
	}


	/**
	 * @param $path
	 *
	 * @return void
	 * @throws
	 */
	private function read_dir_file($path): void
	{
		$files = glob($path . '/*');
		for ($i = 0; $i < count($files); $i++) {
			$file = $files[$i];
			if (is_dir($file)) {
				$this->read_dir_file($file);
			} else {
				$this->resolve_file($file);
			}
		}
	}


	/**
	 * @param $files
	 *
	 * @throws
	 */
	private function resolve_file($files): void
	{
		try {
			static::$currentSourceFile = str_replace('\\', '/', realpath($files) ?: $files);
			include "$files";
		} catch (\Throwable $throwable) {
			\Kiri::getLogger()->json_log($throwable);
		} finally {
			static::$currentSourceFile = null;
		}
	}


	public static function getCurrentSourceFile(): ?string
	{
		return static::$currentSourceFile;
	}

}