<?php

declare(strict_types=1);

namespace app\service\admin\monitor;

use app\model\system\Admin;
use app\scope\global\AccessPermissionScope;
use core\base\BaseService;
use core\jwt\JwtToken;

class OnlineUserService extends BaseService
{
    public function list(array $params = []): array
    {
        $page = max(1, (int)($params['page'] ?? 1));
        $limit = max(1, (int)($params['limit'] ?? 10));
        $keyword = trim((string)($params['keyword'] ?? ''));
        $ip = trim((string)($params['ip'] ?? ''));
        $clientType = trim((string)($params['client_type'] ?? 'admin'));
        $status = trim((string)($params['status'] ?? ''));

        $jwt = new JwtToken();
        $sessions = $jwt->getAllSessions($clientType !== '' ? $clientType : null);
        $userIds = array_values(array_unique(array_filter(array_map(static fn (array $session): string => (string)($session['id'] ?? ''), $sessions))));
        $users = $this->getUsersByIds($userIds);

        $items = [];
        foreach ($sessions as $session) {
            $extra = $session['extra'] ?? [];
            $userId = (string)($session['id'] ?? '');
            $user = $users[$userId] ?? null;
            $account = $extra['user_name'] ?? $user['user_name'] ?? '';
            $realName = $extra['real_name'] ?? $user['real_name'] ?? '';
            $sessionIp = $extra['ip'] ?? $user['login_ip'] ?? '';
            $roleNames = $user['role_names'] ?? $this->formatExtraNames($extra['roles'] ?? []);
            if ($roleNames === '' && (int)($extra['is_super'] ?? 0) === 1) {
                $roleNames = '超级管理员';
            }

            if ($keyword !== '' && !str_contains($account, $keyword) && !str_contains($realName, $keyword)) {
                continue;
            }

            if ($ip !== '' && !str_contains($sessionIp, $ip)) {
                continue;
            }

            $sessionStatus = (string)($session['status'] ?? 'online');
            if ($jwt->getBlacklistStorage()->has((string)($session['jti'] ?? ''))) {
                $sessionStatus = 'offline';
            }
            if ($status !== '' && $sessionStatus !== $status) {
                continue;
            }

            $createdAt = (int)($session['created_at'] ?? $user['login_time'] ?? time());
            $lastActiveAt = (int)($session['last_active_at'] ?? $createdAt);
            $offlineAt = isset($session['offline_at']) ? (int)$session['offline_at'] : null;
            $durationEndAt = $sessionStatus === 'offline' && $offlineAt !== null ? $offlineAt : time();
            $items[] = [
                'jti' => $session['jti'],
                'user_id' => $userId,
                'account' => $account,
                'real_name' => $realName,
                'dept_names' => $user['dept_names'] ?? '',
                'post_names' => $user['post_names'] ?? '',
                'role_names' => $roleNames,
                'ip' => $sessionIp,
                'ip_location' => $extra['ip_location'] ?? '',
                'device' => $extra['os'] ?? $this->getCurrentRequestOs(),
                'browser' => $extra['browser'] ?? $this->getCurrentRequestBrowser(),
                'status' => $sessionStatus,
                'client_type' => $session['client_type'] ?? '',
                'login_time' => $createdAt,
                'last_active_at' => $lastActiveAt,
                'offline_at' => $offlineAt,
                'online_seconds' => max(0, $durationEndAt - $createdAt),
            ];
        }

        usort($items, static fn (array $a, array $b): int => ($b['last_active_at'] ?? 0) <=> ($a['last_active_at'] ?? 0));

        $total = count($items);
        $offset = ($page - 1) * $limit;

        return [
            'items' => array_slice($items, $offset, $limit),
            'total' => $total,
        ];
    }

    public function kickout(string $jti): bool
    {
        return (new JwtToken())->kickoutByJti($jti);
    }

    protected function getUsersByIds(array $ids): array
    {
        if (empty($ids)) {
            return [];
        }

        $rows = Admin::query()
            ->withoutGlobalScopes([AccessPermissionScope::class])
            ->with(['depts', 'posts', 'roles'])
            ->whereIn('id', $ids)
            ->get();

        $users = [];
        foreach ($rows as $row) {
            $users[(string)$row->id] = [
                'user_name' => $row->user_name,
                'real_name' => $row->real_name,
                'is_super' => $row->is_super,
                'login_ip' => $row->login_ip,
                'login_time' => $row->login_time,
                'dept_names' => $row->depts->pluck('name')->implode(' / '),
                'post_names' => $row->posts->pluck('name')->implode(' / '),
                'role_names' => $row->roles->pluck('name')->implode(' / ') ?: ((int)$row->is_super === 1 ? '超级管理员' : ''),
            ];
        }

        return $users;
    }

    protected function formatExtraNames(array $items): string
    {
        $names = [];
        foreach ($items as $item) {
            if (is_array($item) && !empty($item['name'])) {
                $names[] = $item['name'];
            }
        }

        return implode(' / ', $names);
    }

    protected function getCurrentRequestBrowser(): string
    {
        $userAgent = request()?->header('user-agent', '') ?? '';
        if (preg_match('/Edg/i', $userAgent)) {
            return 'Edge';
        }
        if (preg_match('/Firefox/i', $userAgent)) {
            return 'Firefox';
        }
        if (preg_match('/Chrome/i', $userAgent)) {
            return 'Chrome';
        }
        if (preg_match('/Safari/i', $userAgent)) {
            return 'Safari';
        }
        if (preg_match('/Opera/i', $userAgent)) {
            return 'Opera';
        }

        return '';
    }

    protected function getCurrentRequestOs(): string
    {
        $userAgent = request()?->header('user-agent', '') ?? '';
        if (preg_match('/win/i', $userAgent)) {
            return 'Windows';
        }
        if (preg_match('/mac/i', $userAgent)) {
            return 'Mac';
        }
        if (preg_match('/linux/i', $userAgent)) {
            return 'Linux';
        }

        return '';
    }
}