<?php

namespace App\Framework\ErrorHandling;

use App\Framework\Http\Headers;
use App\Framework\Http\HttpResponse;
use App\Framework\Http\ResponseEmitter;
use App\Framework\Http\Status;
use JetBrains\PhpStorm\NoReturn;
use Throwable;

final class ErrorHandler
{
    public static function register(ResponseEmitter $emitter): void
    {
        set_exception_handler(function (Throwable $exception) use ($emitter) {
            self::handleException($exception, $emitter);
        });

        set_error_handler(function (int $errno, string $errstr, string $errfile, int $errline) use ($emitter) {
            $exception = new \ErrorException($errstr, 0, $errno, $errfile, $errline);
            self::handleException($exception, $emitter);
        });

        register_shutdown_function(function () use ($emitter) {
            $error = error_get_last();
            if ($error) {
                $exception = new \ErrorException(
                    $error['message'],
                    0,
                    $error['type'],
                    $error['file'],
                    $error['line']
                );
                self::handleException($exception, $emitter);
            }
        });
    }

    #[NoReturn]
    private static function handleException(Throwable $e, ResponseEmitter $emitter): void
    {
        $isDebug = $_ENV['APP_DEBUG'] ?? false;

        $status = Status::INTERNAL_SERVER_ERROR ?? 500;
        $message = $isDebug
            ? sprintf("Fehler: %s in %s:%d\n\n%s", $e->getMessage(), $e->getFile(), $e->getLine(), $e->getTraceAsString())
            : "Es ist ein interner Fehler aufgetreten.";

        $headers = new Headers()->with('Content-Type', 'text/plain; charset=utf-8');

        $response = new HttpResponse(
            status: $status,
            headers: $headers,
            body: $message
        );

        // Sende die Fehlermeldung (so früh wie möglich!)
        $emitter->emit($response);

        exit(1);
    }
}