<?php

namespace App\Services\User;

use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Auth;

readonly class SessionService
{
    public function fetchSessionLogs(Request $request): Collection
    {
        return collect(
            Auth::user()->sessions,
        )->map(function ($session) use ($request) {
            $info = $this->parseUserAgent($session->user_agent);

            return (object) [
                'agent' => [
                    'is_desktop' => $info['is_desktop'],
                    'platform' => $info['platform'],
                    'browser' => $info['browser'],
                ],
                'ip_address' => $session->ip_address,
                'is_current_device' => $session->id === $request->session()->getId(),
                'last_active' => Carbon::createFromTimestamp($session->last_activity)->diffForHumans(),
            ];
        });
    }

    public function parseUserAgent(string $userAgent): array
    {
        $platform = 'Unknown';
        $browser = 'Unknown';
        $isDesktop = true;

        if (preg_match('/Windows NT 10\.0|Windows NT 11\.0|Macintosh|Linux|FreeBSD/', $userAgent)) {
            $platform = match (true) {
                preg_match('/Windows NT 10\.0/', $userAgent) => 'Windows 10',
                preg_match('/Windows NT 11\.0/', $userAgent) => 'Windows 11',
                preg_match('/Macintosh/', $userAgent) => 'macOS',
                preg_match('/Linux/', $userAgent) => 'Linux',
                preg_match('/FreeBSD/', $userAgent) => 'FreeBSD',
                default => 'Desktop',
            };
        } elseif (preg_match('/Android/i', $userAgent)) {
            $platform = 'Android';
            $isDesktop = false;
        } elseif (preg_match('/iPhone|iPad/i', $userAgent)) {
            $platform = preg_match('/iPad/', $userAgent) ? 'iPad' : 'iOS';
            $isDesktop = false;
        }

        $browser = match (true) {
            preg_match('/Edg\/\d+/', $userAgent) => 'Edge',
            preg_match('/Chrome\/\d+/', $userAgent) && ! preg_match('/OPR|Opera/', $userAgent) => 'Chrome',
            preg_match('/Firefox\/\d+/', $userAgent) => 'Firefox',
            preg_match('/Safari\/\d+/', $userAgent) && ! preg_match('/Chrome/', $userAgent) => 'Safari',
            preg_match('/OPR\/\d+/', $userAgent) => 'Opera',
            preg_match('/MSIE|Trident\//', $userAgent) => 'Internet Explorer',
            default => 'Unknown',
        };

        return [
            'platform' => $platform,
            'browser' => $browser,
            'is_desktop' => $isDesktop,
        ];
    }
}