import { useState, useEffect } from 'react';
import { Shield, Key, Users, Activity, Wifi, Download, Copy, RefreshCw, Play, Pause, AlertCircle, Eye, Globe, CheckCircle, XCircle } from 'lucide-react';
import { wireguardAPI, peerAPI } from '../services/api';
import QRCode from 'qrcode';

function WireGuard() {
  const [status, setStatus] = useState(null);
  const [serverConfig, setServerConfig] = useState(null);
  const [isRefreshingIp, setIsRefreshingIp] = useState(false);
  const [peers, setPeers] = useState([]);
  const [totalPeers, setTotalPeers] = useState(0);
  const [isLoading, setIsLoading] = useState(true);
  const [isRefreshing, setIsRefreshing] = useState(false);
  const [selectedPeer, setSelectedPeer] = useState(null);
  const [showPeerConfig, setShowPeerConfig] = useState(false);
  const [peerConfig, setPeerConfig] = useState('');
  const [qrCodeDataUrl, setQrCodeDataUrl] = useState('');
  const [peerStatuses, setPeerStatuses] = useState({});
  const [tunnelMode, setTunnelMode] = useState('full'); // 'split' or 'full'

  useEffect(() => {
    fetchWireGuardData();
  }, []);

  const refreshExternalIp = async () => {
    setIsRefreshingIp(true);
    try {
      // Refresh IP first (fast)
      const ipResp = await fetch('/api/wireguard/refresh-ip', { method: 'POST' });
      const ipData = await ipResp.json();
      setServerConfig(prev => ({ ...prev, ...ipData, port_open: 'checking' }));
      // Then check port (slow — external call)
      const portResp = await fetch('/api/wireguard/check-port', { method: 'POST' });
      const portData = await portResp.json();
      setServerConfig(prev => ({ ...prev, port_open: portData.port_open }));
    } catch (e) {
      console.error('Failed to refresh IP:', e);
    } finally {
      setIsRefreshingIp(false);
    }
  };

  const fetchWireGuardData = async () => {
    try {
      const [statusResponse, peersResponse, wireguardResponse, serverConfigResponse] = await Promise.all([
        wireguardAPI.getStatus(),
        peerAPI.getPeers(),
        wireguardAPI.getPeers(),
        fetch('/api/wireguard/server-config').then(r => r.json()).catch(() => null),
      ]);

      setStatus(statusResponse.data);
      if (serverConfigResponse) setServerConfig(serverConfigResponse);
      
      // Merge peer registry data with WireGuard data (same as Peers page)
      const peersData = peersResponse.data || [];
      const wireguardPeers = wireguardResponse.data || [];
      
      // Create a map of WireGuard peers by name for quick lookup
      const wireguardMap = {};
      wireguardPeers.forEach(peer => {
        wireguardMap[peer.name] = peer;
      });
      
      // Merge the data
      const mergedPeers = peersData.map(peer => ({
        ...peer,
        ...wireguardMap[peer.peer || peer.name],
        name: peer.peer || peer.name,
        status: 'Online', // For now, assume all peers are online
        type: 'WireGuard',
        // Preserve important fields that might be overwritten
        private_key: peer.private_key,
        server_public_key: peer.server_public_key,
        server_endpoint: peer.server_endpoint,
        allowed_ips: peer.allowed_ips || wireguardMap[peer.peer || peer.name]?.AllowedIPs || '0.0.0.0/0',
        persistent_keepalive: peer.persistent_keepalive || wireguardMap[peer.peer || peer.name]?.PersistentKeepalive || 25
      }));
      
      // Load all peer statuses in one call (keyed by public_key)
      let liveStatuses = {};
      try {
        const stResp = await fetch('/api/wireguard/peers/statuses');
        if (stResp.ok) liveStatuses = await stResp.json();
      } catch (_) {}

      // Normalize snake_case API fields to camelCase for UI
      const normalizeStatus = (st) => ({
        online: st.online ?? null,
        lastHandshake: st.last_handshake || st.lastHandshake || null,
        lastHandshakeSecondsAgo: st.last_handshake_seconds_ago ?? null,
        transferRx: st.transfer_rx ?? st.transferRx ?? 0,
        transferTx: st.transfer_tx ?? st.transferTx ?? 0,
        endpoint: st.endpoint || null,
      });

      // Build name→status map and annotate peers
      const statusMap = {};
      const annotated = mergedPeers.map(peer => {
        const raw = liveStatuses[peer.public_key] || { online: null };
        const st = normalizeStatus(raw);
        statusMap[peer.name] = st;
        return { ...peer, _liveStatus: st };
      });
      setPeerStatuses(statusMap);
      setTotalPeers(annotated.length);

      // Show all peers; live ones bubble up via status indicator
      setPeers(annotated);
    } catch (error) {
      console.error('Failed to fetch WireGuard data:', error);
    } finally {
      setIsLoading(false);
      setIsRefreshing(false);
    }
  };

  const refreshData = async () => {
    setIsRefreshing(true);
    await fetchWireGuardData();
  };

  const handleViewPeerConfig = async (peer, mode = tunnelMode) => {
    setSelectedPeer(peer);
    try {
      const sc = await getServerConfig();
      const peerWithServerConfig = { ...peer, server_public_key: sc.public_key, server_endpoint: sc.endpoint };
      const config = generateWireGuardConfig(peerWithServerConfig, mode);
      setPeerConfig(config);
      
      // Generate QR code for the config
      try {
        const qrDataUrl = await generateQRCode(config);
        setQrCodeDataUrl(qrDataUrl);
      } catch (qrError) {
        console.error('Failed to generate QR code:', qrError);
        setQrCodeDataUrl('');
      }
    } catch (error) {
      console.error('Failed to get peer config:', error);
      setPeerConfig('Failed to load configuration');
      setQrCodeDataUrl('');
    }
    setShowPeerConfig(true);
  };

  const copyToClipboard = async (text) => {
    try {
      await navigator.clipboard.writeText(text);
      alert('Configuration copied to clipboard!');
    } catch (error) {
      console.error('Failed to copy to clipboard:', error);
      alert('Failed to copy to clipboard. Please copy manually.');
    }
  };

  const downloadConfig = (peerName, config) => {
    const blob = new Blob([config], { type: 'text/plain' });
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = `${peerName}.conf`;
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
    URL.revokeObjectURL(url);
  };

  const getServerConfig = async () => {
    if (serverConfig?.public_key) return serverConfig;
    try {
      const response = await fetch('/api/wireguard/server-config');
      if (response.ok) {
        const config = await response.json();
        setServerConfig(config);
        return config;
      }
    } catch (error) {
      console.warn('Could not get server config:', error);
    }
    return { public_key: '', endpoint: '<SERVER_IP>:51820' };
  };

  const CELL_DNS = '172.20.0.3';
  const SPLIT_TUNNEL_IPS = '10.0.0.0/24, 172.20.0.0/16';
  const FULL_TUNNEL_IPS = '0.0.0.0/0, ::/0';

  const generateWireGuardConfig = (peer, mode = tunnelMode) => {
    const serverPublicKey = peer.server_public_key || "SERVER_PUBLIC_KEY_PLACEHOLDER";
    const serverEndpoint = peer.server_endpoint || "YOUR_SERVER_IP:51820";
    const privateKey = peer.private_key || 'YOUR_PRIVATE_KEY_HERE';
    const peerAddress = peer.ip?.includes('/') ? peer.ip : `${peer.ip}/32`;
    const allowedIPs = mode === 'full' ? FULL_TUNNEL_IPS : SPLIT_TUNNEL_IPS;

    return `[Interface]
PrivateKey = ${privateKey}
Address = ${peerAddress}
DNS = ${CELL_DNS}

[Peer]
PublicKey = ${serverPublicKey}
Endpoint = ${serverEndpoint}
AllowedIPs = ${allowedIPs}
PersistentKeepalive = ${peer.persistent_keepalive || 25}`;
  };

  const generateQRCode = async (text) => {
    try {
      const qrDataUrl = await QRCode.toDataURL(text, {
        width: 256,
        margin: 2,
        color: {
          dark: '#000000',
          light: '#FFFFFF'
        },
        errorCorrectionLevel: 'M'
      });
      return qrDataUrl;
    } catch (error) {
      console.error('QR Code generation error:', error);
      throw error;
    }
  };

  const formatBytes = (bytes) => {
    if (bytes === 0) return '0 B';
    const k = 1024;
    const sizes = ['B', 'KB', 'MB', 'GB'];
    const i = Math.floor(Math.log(bytes) / Math.log(k));
    return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
  };

  const getPeerStatus = async (peer) => {
    try {
      // Get real peer status from the API
      const response = await fetch('http://localhost:3000/api/wireguard/peers/status', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          public_key: peer.public_key
        })
      });
      
      if (response.ok) {
        const status = await response.json();
        return {
          online: status.online,
          lastHandshake: status.latest_handshake,
          transferRx: status.transfer_rx || 0,
          transferTx: status.transfer_tx || 0
        };
      } else {
        console.error('Failed to get peer status:', response.status);
        return {
          online: null,
          lastHandshake: null,
          transferRx: 0,
          transferTx: 0
        };
      }
    } catch (error) {
      console.error('Error getting peer status:', error);
      return {
        online: null,
        lastHandshake: null,
        transferRx: 0,
        transferTx: 0
      };
    }
  };

  if (isLoading) {
    return (
      <div className="flex items-center justify-center h-64">
        <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-primary-600"></div>
      </div>
    );
  }

  return (
    <div>
      <div className="mb-8">
        <div className="flex justify-between items-center">
          <div>
            <h1 className="text-2xl font-bold text-gray-900">WireGuard VPN</h1>
            <p className="mt-2 text-gray-600">
              Manage WireGuard VPN configuration and monitor active peers
            </p>
          </div>
          <button
            onClick={refreshData}
            disabled={isRefreshing}
            className="btn btn-secondary flex items-center"
          >
            <RefreshCw className={`h-4 w-4 mr-2 ${isRefreshing ? 'animate-spin' : ''}`} />
            Refresh
          </button>
        </div>
      </div>

      {/* Status Overview */}
      <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6 mb-8">
        <div className="card">
          <div className="flex items-center">
            <div className="p-2 bg-primary-100 rounded-lg">
              <Shield className="h-6 w-6 text-primary-600" />
            </div>
            <div className="ml-4">
              <p className="text-sm font-medium text-gray-500">Service Status</p>
              <p className={`text-lg font-semibold ${status?.running ? 'text-green-600' : 'text-red-600'}`}>
                {status?.running ? 'Online' : 'Offline'}
              </p>
            </div>
          </div>
        </div>

        <div className="card">
          <div className="flex items-center">
            <div className="p-2 bg-blue-100 rounded-lg">
              <Users className="h-6 w-6 text-blue-600" />
            </div>
            <div className="ml-4">
              <p className="text-sm font-medium text-gray-500">Total Peers</p>
              <p className="text-lg font-semibold text-gray-900">{totalPeers}</p>
            </div>
          </div>
        </div>

        <div className="card">
          <div className="flex items-center">
            <div className={`p-2 rounded-lg ${peers.some(p => p._liveStatus?.online) ? 'bg-green-100' : 'bg-gray-100'}`}>
              <Activity className={`h-6 w-6 ${peers.some(p => p._liveStatus?.online) ? 'text-green-600' : 'text-gray-400'}`} />
            </div>
            <div className="ml-4">
              <p className="text-sm font-medium text-gray-500">Live Connections</p>
              <p className={`text-lg font-semibold ${peers.some(p => p._liveStatus?.online) ? 'text-green-600' : 'text-gray-900'}`}>
                {peers.filter(p => p._liveStatus?.online).length} / {totalPeers}
              </p>
            </div>
          </div>
        </div>

        <div className="card">
          <div className="flex items-center">
            <div className="p-2 bg-purple-100 rounded-lg">
              <Wifi className="h-6 w-6 text-purple-600" />
            </div>
            <div className="ml-4">
              <p className="text-sm font-medium text-gray-500">Interface</p>
              <p className="text-lg font-semibold text-gray-900">{status?.interface || 'wg0'}</p>
            </div>
          </div>
        </div>
      </div>

      {/* External IP & Port Status */}
      <div className="card mb-8">
        <div className="flex items-center justify-between mb-4">
          <div className="flex items-center">
            <Globe className="h-5 w-5 text-gray-500 mr-2" />
            <h2 className="text-lg font-semibold text-gray-900">Server Endpoint</h2>
          </div>
          <button
            onClick={refreshExternalIp}
            disabled={isRefreshingIp}
            className="btn btn-secondary flex items-center text-sm"
          >
            <RefreshCw className={`h-3 w-3 mr-1 ${isRefreshingIp ? 'animate-spin' : ''}`} />
            Refresh IP
          </button>
        </div>
        <div className="grid grid-cols-1 md:grid-cols-4 gap-4">
          <div>
            <p className="text-sm text-gray-500">External IP</p>
            <p className="font-mono font-semibold text-gray-900">
              {serverConfig?.external_ip || <span className="text-yellow-600">Detecting…</span>}
            </p>
          </div>
          <div>
            <p className="text-sm text-gray-500">WireGuard Endpoint</p>
            <p className="font-mono font-semibold text-gray-900">
              {serverConfig?.endpoint || `<SERVER_IP>:${serverConfig?.port || 51820}`}
            </p>
          </div>
          <div>
            <p className="text-sm text-gray-500">UDP Port {serverConfig?.port || 51820}</p>
            {serverConfig ? (
              <span className={`inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium ${
                serverConfig.port_open === true ? 'bg-green-100 text-green-800' :
                serverConfig.port_open === false ? 'bg-red-100 text-red-800' :
                'bg-gray-100 text-gray-600'
              }`}>
                <span className={`w-1.5 h-1.5 rounded-full mr-1.5 ${
                  serverConfig.port_open === true ? 'bg-green-400' :
                  serverConfig.port_open === false ? 'bg-red-400' : 'bg-gray-400'
                }`} />
                {serverConfig.port_open === true ? 'Open' :
                 serverConfig.port_open === false ? 'Blocked' :
                 serverConfig.port_open === 'checking' ? 'Checking…' :
                 'Click Refresh IP to check'}
              </span>
            ) : '—'}
          </div>
          <div>
            <p className="text-sm text-gray-500 mb-1">Server Public Key</p>
            <p className="font-mono text-xs text-gray-700 break-all">
              {serverConfig?.public_key || '—'}
            </p>
          </div>
        </div>
        {serverConfig && !serverConfig.external_ip && (
          <div className="mt-3 flex items-center text-yellow-700 bg-yellow-50 rounded p-2 text-sm">
            <AlertCircle className="h-4 w-4 mr-2 flex-shrink-0" />
            External IP could not be detected. Check internet connectivity, then click Refresh IP.
          </div>
        )}
        {serverConfig && serverConfig.port_open === false && (
          <div className="mt-3 flex items-center text-red-700 bg-red-50 rounded p-2 text-sm">
            <AlertCircle className="h-4 w-4 mr-2 flex-shrink-0" />
            UDP port {serverConfig.port || 51820} appears closed. Check your router/firewall and forward this port to this machine.
          </div>
        )}
      </div>

      {/* Traffic Stats */}
      {status?.total_traffic && (
        <div className="card mb-8">
          <div className="flex items-center mb-4">
            <Activity className="h-6 w-6 text-primary-500 mr-2" />
            <h3 className="text-lg font-medium text-gray-900">Traffic Statistics</h3>
          </div>
          <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
            <div>
              <p className="text-sm text-gray-500 mb-1">Data Received</p>
              <p className="text-2xl font-bold text-green-600">
                {formatBytes(status.total_traffic.bytes_received || 0)}
              </p>
            </div>
            <div>
              <p className="text-sm text-gray-500 mb-1">Data Sent</p>
              <p className="text-2xl font-bold text-blue-600">
                {formatBytes(status.total_traffic.bytes_sent || 0)}
              </p>
            </div>
          </div>
        </div>
      )}

      {/* Peers Table */}
        <div className="card">
          <div className="flex items-center justify-between mb-6">
            <div className="flex items-center">
              <Users className="h-6 w-6 text-primary-500 mr-2" />
              <h3 className="text-lg font-medium text-gray-900">Live Connected Peers</h3>
            </div>
            <div className="text-sm text-gray-500">
              {peers.length} peer{peers.length !== 1 ? 's' : ''} currently connected
            </div>
          </div>

        {peers.length === 0 ? (
          <div className="text-center py-12">
            <Wifi className="h-12 w-12 text-gray-400 mx-auto mb-4" />
            <h3 className="text-lg font-medium text-gray-900 mb-2">No active connections</h3>
            <p className="text-gray-500 mb-4">No peers are currently connected to the WireGuard VPN</p>
            <div className="space-y-2">
              <p className="text-sm text-gray-400">Configured peers will appear here when they connect</p>
              <button
                onClick={() => window.location.href = '/peers'}
                className="btn btn-secondary"
              >
                Manage Peers
              </button>
            </div>
          </div>
        ) : (
          <div className="overflow-x-auto">
            <table className="min-w-full divide-y divide-gray-200">
              <thead className="bg-gray-50">
                <tr>
                  <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                    Peer
                  </th>
                  <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                    IP Address
                  </th>
                  <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                    Status
                  </th>
                  <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                    Last Handshake
                  </th>
                  <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                    Traffic
                  </th>
                  <th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
                    Actions
                  </th>
                </tr>
              </thead>
              <tbody className="bg-white divide-y divide-gray-200">
                {peers.map((peer, index) => {
                  const peerStatus = peerStatuses[peer.name] || { online: null, lastHandshake: null, transferRx: 0, transferTx: 0, endpoint: null };
                  return (
                    <tr key={index} className="hover:bg-gray-50">
                      <td className="px-6 py-4 whitespace-nowrap">
                        <div className="flex items-center">
                          <div className="flex-shrink-0 h-8 w-8">
                            <div className="h-8 w-8 rounded-full bg-primary-100 flex items-center justify-center">
                              <Shield className="h-4 w-4 text-primary-600" />
                            </div>
                          </div>
                          <div className="ml-4">
                            <div className="text-sm font-medium text-gray-900">{peer.name}</div>
                            {peer.description && (
                              <div className="text-sm text-gray-500">{peer.description}</div>
                            )}
                          </div>
                        </div>
                      </td>
                      <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-900">
                        {peer.ip || peer.AllowedIPs || 'N/A'}
                      </td>
                      <td className="px-6 py-4 whitespace-nowrap">
                        <span className={`inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium ${
                          peerStatus.online === true
                            ? 'bg-green-100 text-green-800' 
                            : peerStatus.online === false
                            ? 'bg-red-100 text-red-800'
                            : 'bg-gray-100 text-gray-800'
                        }`}>
                          <div className={`w-1.5 h-1.5 rounded-full mr-1.5 ${
                            peerStatus.online === true ? 'bg-green-400' : 
                            peerStatus.online === false ? 'bg-red-400' : 'bg-gray-400'
                          }`} />
                          {peerStatus.online === true ? 'Online' : 
                           peerStatus.online === false ? 'Offline' : 'Unknown'}
                        </span>
                      </td>
                      <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-500">
                        {peerStatus.lastHandshake 
                          ? new Date(peerStatus.lastHandshake).toLocaleString()
                          : 'Unknown'
                        }
                      </td>
                      <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-500">
                        <div className="space-y-1">
                          <div className="flex items-center text-xs">
                            <span className="text-green-600 mr-1">↓</span>
                            {peerStatus.transferRx > 0 ? formatBytes(peerStatus.transferRx) : 'No data'}
                          </div>
                          <div className="flex items-center text-xs">
                            <span className="text-blue-600 mr-1">↑</span>
                            {peerStatus.transferTx > 0 ? formatBytes(peerStatus.transferTx) : 'No data'}
                          </div>
                        </div>
                      </td>
                      <td className="px-6 py-4 whitespace-nowrap text-sm font-medium">
                        <div className="flex space-x-2">
                          <button
                            onClick={() => handleViewPeerConfig(peer)}
                            className="text-primary-600 hover:text-primary-900"
                            title="View Configuration"
                          >
                            <Eye className="h-4 w-4" />
                          </button>
                          <button
                            onClick={() => handleViewPeerConfig(peer)}
                            className="text-green-600 hover:text-green-900"
                            title="Show QR Code"
                          >
                            <div className="h-4 w-4 border-2 border-current rounded-sm flex items-center justify-center">
                              <div className="w-2 h-2 bg-current rounded-sm"></div>
                            </div>
                          </button>
                        </div>
                      </td>
                    </tr>
                  );
                })}
              </tbody>
            </table>
          </div>
        )}
      </div>

      {/* Peer Configuration Modal */}
      {showPeerConfig && selectedPeer && (
        <div 
          className="fixed inset-0 bg-gray-600 bg-opacity-50 overflow-y-auto h-full w-full z-50"
          onClick={(e) => {
            // Close modal when clicking on backdrop
            if (e.target === e.currentTarget) {
              setShowPeerConfig(false);
            }
          }}
        >
          <div className="relative top-10 mx-auto p-5 border w-full max-w-4xl shadow-lg rounded-md bg-white">
            <div className="mt-3">
              <div className="flex items-center justify-between mb-4">
                <div className="flex items-center">
                  <Shield className="h-6 w-6 text-primary-500 mr-2" />
                  <h3 className="text-lg font-medium text-gray-900">
                    {selectedPeer.name} Configuration
                  </h3>
                </div>
                <div className="flex items-center space-x-3">
                  <div className="flex items-center bg-gray-100 rounded-lg p-1 text-xs">
                    <button
                      onClick={() => { setTunnelMode('split'); handleViewPeerConfig(selectedPeer, 'split'); }}
                      className={`px-2 py-1 rounded ${tunnelMode === 'split' ? 'bg-white shadow text-primary-700 font-medium' : 'text-gray-500'}`}
                    >
                      Split tunnel
                    </button>
                    <button
                      onClick={() => { setTunnelMode('full'); handleViewPeerConfig(selectedPeer, 'full'); }}
                      className={`px-2 py-1 rounded ${tunnelMode === 'full' ? 'bg-white shadow text-primary-700 font-medium' : 'text-gray-500'}`}
                    >
                      Full tunnel
                    </button>
                  </div>
                  <button
                    onClick={() => setShowPeerConfig(false)}
                    className="text-gray-400 hover:text-gray-600"
                  >
                    ✕
                  </button>
                </div>
              </div>
              <p className="text-xs text-gray-500 mb-3">
                {tunnelMode === 'split'
                  ? 'Split tunnel: only cell services (10.0.0.0/24, 172.20.0.0/16) route through VPN — local network & internet traffic stay direct.'
                  : 'Full tunnel: all traffic (internet + local) routes through VPN server.'}
              </p>
              
              <div className="space-y-4">
                <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                  <div>
                    <label className="block text-sm font-medium text-gray-700 mb-1">
                      Peer Name
                    </label>
                    <p className="text-sm text-gray-900 bg-gray-50 p-2 rounded">{selectedPeer.name}</p>
                  </div>
                  <div>
                    <label className="block text-sm font-medium text-gray-700 mb-1">
                      IP Address
                    </label>
                    <p className="text-sm text-gray-900 bg-gray-50 p-2 rounded">{selectedPeer.ip || selectedPeer.AllowedIPs}</p>
                  </div>
                  <div>
                    <label className="block text-sm font-medium text-gray-700 mb-1">
                      Public Key
                    </label>
                    <p className="text-xs text-gray-900 bg-gray-50 p-2 rounded break-all">{selectedPeer.public_key || selectedPeer.PublicKey}</p>
                  </div>
                  <div>
                    <label className="block text-sm font-medium text-gray-700 mb-1">
                      Allowed IPs
                    </label>
                    <p className="text-sm text-gray-900 bg-gray-50 p-2 rounded">{selectedPeer.allowed_ips || selectedPeer.AllowedIPs}</p>
                  </div>
                </div>
                
                <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
                  <div>
                    <label className="block text-sm font-medium text-gray-700 mb-2">
                      WireGuard Configuration
                    </label>
                    <div className="relative">
                      <textarea
                        value={peerConfig}
                        readOnly
                        className="w-full h-64 p-3 border border-gray-300 rounded-md font-mono text-sm bg-gray-50"
                        placeholder="Loading configuration..."
                      />
                      <div className="absolute top-2 right-2 flex space-x-2">
                        <button
                          onClick={() => copyToClipboard(peerConfig)}
                          className="btn btn-secondary btn-sm flex items-center"
                          title="Copy to clipboard"
                        >
                          <Copy className="h-4 w-4 mr-1" />
                          Copy
                        </button>
                        <button
                          onClick={() => downloadConfig(selectedPeer.name, peerConfig)}
                          className="btn btn-secondary btn-sm flex items-center"
                          title="Download config file"
                        >
                          <Download className="h-4 w-4 mr-1" />
                          Download
                        </button>
                      </div>
                    </div>
                    <p className="text-xs text-gray-500 mt-2">
                      Use this configuration on your mobile device or computer to connect to this WireGuard network.
                    </p>
                  </div>

                  {/* QR Code Section */}
                  <div>
                    <label className="block text-sm font-medium text-gray-700 mb-2 flex items-center">
                      <div className="h-5 w-5 mr-2 border-2 border-gray-400 rounded-sm flex items-center justify-center">
                        <div className="w-2 h-2 bg-gray-400 rounded-sm"></div>
                      </div>
                      QR Code
                    </label>
                    <div className="text-center">
                      {qrCodeDataUrl ? (
                        <div className="space-y-4">
                          <div className="inline-block p-4 bg-white border-2 border-gray-200 rounded-lg">
                            <img 
                              src={qrCodeDataUrl} 
                              alt="WireGuard QR Code" 
                              className="w-48 h-48 mx-auto"
                            />
                          </div>
                          <div className="space-y-2">
                            <p className="text-sm text-gray-600">
                              Scan this QR code with your WireGuard app to connect automatically
                            </p>
                            <div className="flex justify-center space-x-2">
                              <button
                                onClick={() => {
                                  const link = document.createElement('a');
                                  link.href = qrCodeDataUrl;
                                  link.download = `${selectedPeer.name}-qrcode.png`;
                                  link.click();
                                }}
                                className="btn btn-sm btn-secondary flex items-center"
                                title="Download QR Code"
                              >
                                <Download className="h-4 w-4 mr-1" />
                                Download QR
                              </button>
                            </div>
                          </div>
                        </div>
                      ) : (
                        <div className="p-8 bg-gray-50 border-2 border-dashed border-gray-300 rounded-lg">
                          <div className="h-12 w-12 border-2 border-gray-400 rounded-sm flex items-center justify-center mx-auto mb-2">
                            <div className="w-6 h-6 bg-gray-400 rounded-sm"></div>
                          </div>
                          <p className="text-sm text-gray-500">
                            QR Code will appear here
                          </p>
                        </div>
                      )}
                    </div>
                  </div>
                </div>
              </div>
              
              <div className="flex justify-end space-x-3 mt-6">
                <button
                  onClick={() => setShowPeerConfig(false)}
                  className="btn btn-secondary"
                >
                  Close
                </button>
              </div>
            </div>
          </div>
        </div>
      )}
    </div>
  );
}

export default WireGuard;