
<?php

declare(strict_types=1);

$osRelease = [];
$osReleasePath = '/etc/os-release';

if (is_readable($osReleasePath)) {
    $lines = file($osReleasePath, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES) ?: [];
    foreach ($lines as $line) {
        if (!str_contains($line, '=')) {
            continue;
        }

        [$key, $value] = explode('=', $line, 2);
        $osRelease[$key] = trim($value, "\"'");
    }
}

$packages = [];
$commands = [
    "dpkg-query -W -f='\${Package} \${Version}\n' php8.5-fpm php8.4-fpm php8.3-fpm php8.2-fpm php8.1-fpm php-fpm 2>/dev/null",
    "rpm -qa --qf '%{NAME} %{VERSION}-%{RELEASE}\n' 'php*' 2>/dev/null",
];

foreach ($commands as $command) {
    $output = @shell_exec($command);
    if (!is_string($output) || trim($output) === '') {
        continue;
    }

    foreach (preg_split('/\R/', trim($output)) ?: [] as $line) {
        $parts = preg_split('/\s+/', trim($line), 2) ?: [];
        if (count($parts) === 2) {
            $packages[] = ['name' => $parts[0], 'version' => $parts[1]];
        }
    }
}

$payload = [
    'agent_version' => '1.0',
    'generated_at' => gmdate('c'),
    'php_version' => PHP_VERSION,
    'php_sapi' => PHP_SAPI,
    'os_family' => PHP_OS_FAMILY,
    'distro' => [
        'id' => $osRelease['ID'] ?? null,
        'version_id' => $osRelease['VERSION_ID'] ?? null,
        'pretty_name' => $osRelease['PRETTY_NAME'] ?? null,
    ],
    'packages' => $packages,
    'ini' => [
        'memory_limit' => ini_get('memory_limit'),
        'post_max_size' => ini_get('post_max_size'),
        'max_input_nesting_level' => ini_get('max_input_nesting_level'),
        'max_input_vars' => ini_get('max_input_vars'),
        'max_file_uploads' => ini_get('max_file_uploads'),
    ],
];

echo json_encode($payload, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES) . PHP_EOL;