<?php

declare(strict_types=1);

use Monolog\Formatter\JsonFormatter;
use Monolog\Handler\StreamHandler;
use Monolog\Logger;
use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Slim\Factory\AppFactory;
use Slim\Views\Twig;
use Slim\Views\TwigMiddleware;

require __DIR__ . '/../vendor/autoload.php';

$appEnv = getenv('APP_ENV') ?: 'production';
$logLevelName = strtoupper((string) (getenv('LOG_LEVEL') ?: 'info'));
$logLevel = match ($logLevelName) {
    'DEBUG' => Monolog\Level::Debug,
    'NOTICE' => Monolog\Level::Notice,
    'WARNING' => Monolog\Level::Warning,
    'ERROR' => Monolog\Level::Error,
    'CRITICAL' => Monolog\Level::Critical,
    default => Monolog\Level::Info,
};

$logger = new Logger('ui');
$handler = new StreamHandler('php://stdout', $logLevel);
$handler->setFormatter(new JsonFormatter());
$logger->pushHandler($handler);

$app = AppFactory::create();
$twig = Twig::create(__DIR__ . '/../resources/views', [
    'cache' => false,
    'auto_reload' => $appEnv === 'development',
]);
$app->add(TwigMiddleware::create($app, $twig));
$app->addRoutingMiddleware();
$app->addBodyParsingMiddleware();
$app->addErrorMiddleware($appEnv === 'development', true, true, $logger);

$app->get('/', function (Request $request, Response $response) use ($twig): Response {
    return $twig->render($response, 'pages/hello.twig');
});

$app->get('/healthz', function (Request $request, Response $response): Response {
    // Stub healthcheck. Later milestones extend with real api reachability checks.
    $payload = [
        'status' => 'ok',
        'api_reachable' => null,
        'last_api_check_at' => null,
    ];
    $response->getBody()->write((string) json_encode($payload));

    return $response->withHeader('Content-Type', 'application/json');
});

$app->map(
    ['GET', 'POST', 'PUT', 'PATCH', 'DELETE', 'OPTIONS'],
    '/{routes:.+}',
    function (Request $request, Response $response): Response {
        $response->getBody()->write((string) json_encode(['error' => 'not_found']));

        return $response
            ->withHeader('Content-Type', 'application/json')
            ->withStatus(404);
    }
);

$app->run();