'use client';

import { motion } from 'framer-motion';
import { Router, Globe, Shield } from 'lucide-react';

export default function NATTraversalDiagram() {
  return (
    <div className="bg-gray-50 dark:bg-gray-800 rounded-lg p-8 border border-gray-200 dark:border-gray-700">
      <div className="grid grid-cols-1 md:grid-cols-3 gap-6">
        {/* Local Network */}
        <motion.div
          initial={{ opacity: 0, y: 20 }}
          whileInView={{ opacity: 1, y: 0 }}
          viewport={{ once: true }}
          className="bg-white dark:bg-gray-900 p-6 rounded-lg border border-gray-200 dark:border-gray-700"
        >
          <div className="flex items-center space-x-2 mb-4">
            <Router className="h-6 w-6 text-blue-600 dark:text-blue-400" />
            <h3 className="font-semibold text-gray-900 dark:text-white">Local Network</h3>
          </div>
          <ul className="space-y-2 text-sm text-gray-600 dark:text-gray-400">
            <li>• Device 1: 192.168.1.10</li>
            <li>• Device 2: 192.168.1.11</li>
            <li>• Device 3: 192.168.1.12</li>
          </ul>
        </motion.div>

        {/* NAT Device */}
        <motion.div
          initial={{ opacity: 0, y: 20 }}
          whileInView={{ opacity: 1, y: 0 }}
          viewport={{ once: true }}
          transition={{ delay: 0.2 }}
          className="bg-white dark:bg-gray-900 p-6 rounded-lg border border-gray-200 dark:border-gray-700"
        >
          <div className="flex items-center space-x-2 mb-4">
            <Shield className="h-6 w-6 text-purple-600 dark:text-purple-400" />
            <h3 className="font-semibold text-gray-900 dark:text-white">NAT Router</h3>
          </div>
          <div className="text-sm text-gray-600 dark:text-gray-400 space-y-2">
            <p><strong>Public IP:</strong> 203.0.113.1</p>
            <p><strong>Function:</strong></p>
            <ul className="list-disc pl-4 space-y-1">
              <li>Maps private IPs to public ports</li>
              <li>Maintains connection state</li>
              <li>Blocks unsolicited incoming traffic</li>
            </ul>
          </div>
        </motion.div>

        {/* Internet */}
        <motion.div
          initial={{ opacity: 0, y: 20 }}
          whileInView={{ opacity: 1, y: 0 }}
          viewport={{ once: true }}
          transition={{ delay: 0.4 }}
          className="bg-white dark:bg-gray-900 p-6 rounded-lg border border-gray-200 dark:border-gray-700"
        >
          <div className="flex items-center space-x-2 mb-4">
            <Globe className="h-6 w-6 text-green-600 dark:text-green-400" />
            <h3 className="font-semibold text-gray-900 dark:text-white">Internet</h3>
          </div>
          <div className="text-sm text-gray-600 dark:text-gray-400 space-y-2">
            <p><strong>Challenge:</strong></p>
            <ul className="list-disc pl-4 space-y-1">
              <li>Devices behind NAT can't receive direct connections</li>
              <li>UDP hole-punching creates temporary openings</li>
              <li>CGNAT adds additional complexity</li>
            </ul>
          </div>
        </motion.div>
      </div>

      <div className="mt-6 p-4 bg-blue-50 dark:bg-blue-900 rounded-lg border border-blue-200 dark:border-blue-700">
        <p className="text-sm text-blue-800 dark:text-blue-200">
          <strong>P2NS Solution:</strong> Holesail uses advanced UDP hole-punching techniques and relay servers 
          to establish connections even through multiple layers of NAT and CGNAT.
        </p>
      </div>
    </div>
  );
}