<?php

namespace App\Helpers;

class HttpRequestHelper
{
    public static function getRequestInfo(): array
    {
        $request = service('request');

        $uaString = $request->getHeaderLine('User-Agent');

        // Detect platform & browser using robust fallback logic
        [$platform, $browser] = self::detectFromUserAgent($uaString);

        $data = [
            'ip'         => $request->getIPAddress(),
            'real_ip'         => getRealClientIP(),
            'platform'   => $platform,
            'browser'    => $browser,
            'method'     => strtoupper($request->getMethod()),
            'endpoint'   => $request->uri->getPath(),
            'getparams'  => json_encode($request->uri->getSegments(), JSON_UNESCAPED_UNICODE),
            'postparams' => self::sanitizePostForLog($request->getPost()),
        ];

        return $data;
    }

    /**
     * Detect platform & browser from UA string (reliable fallback)
     */
    private static function detectFromUserAgent(string $ua): array
    {
        $uaLower = strtolower($ua);

        // =========================
        // PLATFORM DETECTION
        // =========================
        $platform = 'Unknown';

        if (str_contains($uaLower, 'windows nt 11') || str_contains($uaLower, 'windows 11')) {
            $platform = 'Windows 11';
        } elseif (str_contains($uaLower, 'windows nt 10')) {
            $platform = 'Windows 10';
        } elseif (str_contains($uaLower, 'windows nt 6.3')) {
            $platform = 'Windows 8.1';
        } elseif (str_contains($uaLower, 'windows nt 6.2')) {
            $platform = 'Windows 8';
        } elseif (str_contains($uaLower, 'windows nt 6.1')) {
            $platform = 'Windows 7';
        } elseif (str_contains($uaLower, 'windows nt 6.0')) {
            $platform = 'Windows Vista';
        } elseif (str_contains($uaLower, 'windows nt 5.1') || str_contains($uaLower, 'windows xp')) {
            $platform = 'Windows XP';
        } elseif (str_contains($uaLower, 'android')) {
            $platform = 'Android';
        } elseif (str_contains($uaLower, 'iphone')) {
            $platform = 'iOS (iPhone)';
        } elseif (str_contains($uaLower, 'ipad')) {
            $platform = 'iOS (iPad)';
        } elseif (str_contains($uaLower, 'ipod')) {
            $platform = 'iOS (iPod)';
        } elseif (str_contains($uaLower, 'mac os') || str_contains($uaLower, 'macintosh')) {
            $platform = 'Mac OS';
        } elseif (str_contains($uaLower, 'cros')) {
            $platform = 'Chrome OS';
        } elseif (str_contains($uaLower, 'linux')) {
            $platform = 'Linux';
        } elseif (str_contains($uaLower, 'freebsd')) {
            $platform = 'FreeBSD';
        } elseif (str_contains($uaLower, 'openbsd')) {
            $platform = 'OpenBSD';
        } elseif (str_contains($uaLower, 'netbsd')) {
            $platform = 'NetBSD';
        } elseif (str_contains($uaLower, 'unix')) {
            $platform = 'Unix';
        } elseif (str_contains($uaLower, 'symbian')) {
            $platform = 'Symbian';
        } elseif (str_contains($uaLower, 'blackberry')) {
            $platform = 'BlackBerry';
        } elseif (str_contains($uaLower, 'tizen')) {
            $platform = 'Tizen';
        } elseif (str_contains($uaLower, 'webos')) {
            $platform = 'WebOS';
        } elseif (str_contains($uaLower, 'kaios')) {
            $platform = 'KaiOS';
        } elseif (str_contains($uaLower, 'harmonyos')) {
            $platform = 'HarmonyOS';
        } elseif (str_contains($uaLower, 'watchos')) {
            $platform = 'watchOS';
        } elseif (str_contains($uaLower, 'tv os') || str_contains($uaLower, 'tvos')) {
            $platform = 'tvOS';
        }

        // =========================
        // BROWSER / CLIENT DETECTION
        // =========================
        $browser = 'Unknown';

        // Bots & tools first
        if (preg_match('/googlebot|bingbot|slurp|duckduckbot|baiduspider|yandexbot|sogou|exabot|facebot|ia_archiver/i', $ua)) {
            $browser = 'Search Bot';
        } elseif (preg_match('/postman/i', $ua)) {
            $browser = 'Postman';
        } elseif (preg_match('/insomnia/i', $ua)) {
            $browser = 'Insomnia';
        } elseif (preg_match('/curl/i', $ua)) {
            $browser = 'curl';
        } elseif (preg_match('/wget/i', $ua)) {
            $browser = 'wget';
        }

        // Real browsers
        elseif (preg_match('/edg\/([\d\.]+)/i', $ua, $m)) {
            $browser = 'Edge ' . $m[1];
        } elseif (preg_match('/opr\/([\d\.]+)/i', $ua, $m)) {
            $browser = 'Opera ' . $m[1];
        } elseif (preg_match('/vivaldi\/([\d\.]+)/i', $ua, $m)) {
            $browser = 'Vivaldi ' . $m[1];
        } elseif (preg_match('/brave\/([\d\.]+)/i', $ua, $m)) {
            $browser = 'Brave ' . $m[1];
        } elseif (preg_match('/chrome\/([\d\.]+)/i', $ua, $m)) {
            $browser = 'Chrome ' . $m[1];
        } elseif (preg_match('/firefox\/([\d\.]+)/i', $ua, $m)) {
            $browser = 'Firefox ' . $m[1];
        } elseif (preg_match('/safari\/([\d\.]+)/i', $ua, $m)) {
            $browser = 'Safari ' . $m[1];
        } elseif (preg_match('/msie\s([\d\.]+)/i', $ua, $m) || preg_match('/trident\/.*rv:([\d\.]+)/i', $ua, $m)) {
            $browser = 'Internet Explorer ' . $m[1];
        }

        // In-app browsers
        elseif (preg_match('/fbav|fban/i', $ua)) {
            $browser = 'Facebook In-App Browser';
        } elseif (preg_match('/instagram/i', $ua)) {
            $browser = 'Instagram In-App Browser';
        } elseif (preg_match('/linkedinapp/i', $ua)) {
            $browser = 'LinkedIn In-App Browser';
        } elseif (preg_match('/twitter/i', $ua)) {
            $browser = 'Twitter/X In-App Browser';
        }

        return [$platform, $browser];
    }


    /**
     * Remove sensitive fields before logging POST
     */
    private static function sanitizePostForLog(array $post): string
    {
        if (empty($post)) {
            return json_encode([]);
        }

        $sensitiveKeys = [
            'password', 'pass', 'pwd',
            'token', 'access_token', 'refresh_token',
            'secret', 'api_key', 'authorization',
            'otp', 'pin'
        ];

        foreach ($post as $k => $v) {
            foreach ($sensitiveKeys as $sk) {
                if (stripos($k, $sk) !== false) {
                    $post[$k] = '***MASKED***';
                }
            }
        }

        return json_encode($post, JSON_UNESCAPED_UNICODE);
    }

    public static function add($payload)
    {
        return $payload['a'] + $payload['b'];
    }
}