<?php

/**
 * Standalone driver for ChildFatalErrorGuardTest.
 *
 * Runs outside PHPUnit and Laravel on purpose: a real fatal error in a forked
 * PHPUnit process would print the framework's console error rendering into
 * the test output. Forks one child over a SocketPairIpc, lets it die in the
 * requested way, and prints what the parent received as JSON.
 *
 * Usage: php fatal_child.php <oom|oom-disarmed|warning-then-exit|clean-exit>
 */

declare(strict_types=1);

use BlaxSoftware\LaravelWebSockets\Ipc\SocketPairIpc;
use BlaxSoftware\LaravelWebSockets\Server\ChildFatalErrorGuard;
use BlaxSoftware\LaravelWebSockets\Websocket\ChildMessageOutcome;
use React\EventLoop\StreamSelectLoop;

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

$mode = $argv[1] ?? 'oom';

$loop = new StreamSelectLoop();
$ipc = SocketPairIpc::create($loop);

$pid = pcntl_fork();

if ($pid === 0) {
    $ipc->setupChild();

    // Stand-in for Laravel's HandleExceptions: registered earlier (in the
    // server process), so it runs before the guard and sees the error first.
    register_shutdown_function(function () {
        $error = error_get_last();
        if ($error !== null) {
            fwrite(STDERR, 'app handler saw: ' . $error['message'] . "\n");
        }
    });

    $frame = json_encode([
        'event' => 'demo.crash:error',
        'data' => ['message' => 'Internal server error', 'meta' => ['reported' => true, 'fatal' => true]],
        'channel' => 'test',
    ]);

    $guard = ChildFatalErrorGuard::register(function () use ($ipc, $frame) {
        $ipc->sendToParent($frame);
    });

    if ($mode === 'clean-exit') {
        exit(0);
    }

    if ($mode === 'warning-then-exit') {
        @trigger_error('just a warning', E_USER_WARNING);
        exit(0);
    }

    if ($mode === 'oom-disarmed') {
        $guard->disarm();
    }

    ini_set('memory_limit', '32M');
    $hog = [];
    while (true) {
        $hog[] = str_repeat('x', 1024 * 1024);
    }
}

$frames = [];
$outcome = new ChildMessageOutcome('demo.crash', function () {
});

$ipc->setupParent(
    function ($data) use (&$frames, $outcome) {
        $frames[] = $data;
        $outcome->frameReceived($data);
    },
    function () use ($loop) {
        $loop->stop();
    }
);

$loop->addTimer(10, function () use ($loop) {
    $loop->stop();
});
$loop->run();

pcntl_waitpid($pid, $status);

echo json_encode([
    'frames' => $frames,
    'exit_code' => pcntl_wifexited($status) ? pcntl_wexitstatus($status) : null,
    'replied' => $outcome->replied(),
]);