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<!DOCTYPE html>
<html lang="en">
<head>
    <!-- Enhanced Meta Tags -->
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Advanced Satellite Communication Simulator">
    
    <!-- Enhanced Styles -->
    <style>
        /* Complex CSS Animations */
        @keyframes quantum-glow {
            0% { filter: drop-shadow(0 0 5px #4ff1ff); }
            50% { filter: drop-shadow(0 0 20px #a162e8); }
            100% { filter: drop-shadow(0 0 5px #4ff1ff); }
        }
        
        /* Advanced UI Components */
        .holo-panel {
            background: linear-gradient(145deg, rgba(15,23,42,0.9), rgba(88,28,135,0.9));
            backdrop-filter: blur(12px);
            border: 1px solid rgba(79,209,255,0.3);
            border-radius: 20px;
            box-shadow: 0 8px 32px rgba(0,0,0,0.3);
        }
    </style>
    
    <!-- Additional Libraries -->
    <link href="https://unpkg.com/tippy.js@6/dist/tippy.css" rel="stylesheet">
    <script src="https://unpkg.com/three@0.132.2/examples/js/loaders/GLTFLoader.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/@tweenjs/tween.js@18/dist/tween.umd.js"></script>
</head>
<body>
    <!-- Enhanced 3D Scene -->
    <div id="scene-container">
        <!-- Particle Systems -->
        <div id="quantum-particles"></div>
        
        <!-- Advanced UI -->
        <div class="command-center">
            <div class="strategic-overlay">
                <div class="hud-element" data-type="radar"></div>
                <div class="hud-element" data-type="telemetry"></div>
                <div class="holographic-console"></div>
            </div>
        </div>
    </div>

    <script type="module">
        // Complex Three.js Scene Configuration
        class QuantumScene {
            constructor() {
                this.initPostProcessing();
                this.initGalaxyField();
                this.loadAdvancedModels();
            }
            
            initPostProcessing() {
                // WebGL2 Rendering Pipeline
                this.renderTarget = new THREE.WebGLRenderTarget(
                    window.innerWidth, window.innerHeight,
                    { samples: 8 }
                );
                
                // Screen-Space Reflections
                this.ssrPass = new SSRPass({
                    renderer: this.renderer,
                    scene: this.scene,
                    camera: this.camera,
                    width: window.innerWidth,
                    height: window.innerHeight
                });
            }
            
            initGalaxyField() {
                // Star Particle System
                const starsGeometry = new THREE.BufferGeometry();
                const starPositions = new Float32Array(10000 * 3);
                
                for(let i = 0; i < 10000; i++) {
                    starPositions[i*3] = (Math.random() - 0.5) * 2000;
                    starPositions[i*3+1] = (Math.random() - 0.5) * 2000;
                    starPositions[i*3+2] = (Math.random() - 0.5) * 2000;
                }
                
                starsGeometry.setAttribute('position', 
                    new THREE.BufferAttribute(starPositions, 3));
                
                const starsMaterial = new THREE.PointsMaterial({
                    color: 0xFFFFFF,
                    size: 0.7,
                    transparent: true
                });
                
                this.starField = new THREE.Points(starsGeometry, starsMaterial);
                scene.add(this.starField);
            }
            
            async loadAdvancedModels() {
                // GLTF Model Loading
                const loader = new GLTFLoader();
                
                // High-precision Satellite Model
                this.satellite = await loader.loadAsync('models/quantum_satellite.glb');
                this.satellite.scene.traverse(child => {
                    if(child.isMesh) {
                        child.material = new THREE.MeshPhysicalMaterial({
                            metalness: 0.9,
                            roughness: 0.1,
                            clearcoat: 1.0,
                            emissive: '#4fd1ff'
                        });
                    }
                });
                
                // Add Antenna Animation Mixer
                this.antennaMixer = new THREE.AnimationMixer(this.satellite.scene);
                const antennaAction = this.antennaMixer.clipAction(
                    this.satellite.animations[0]
                );
                antennaAction.play();
            }
        }

        // Advanced Protocol Simulation Engine
        class QuantumProtocolEngine {
            constructor() {
                this.transmissionQueue = new Map();
                this.errorProbability = 0.3;
                this.latencyProfile = {
                    earthToSat: 1200,
                    satToEarth: 800
                };
                
                this.initMachineLearningPredictor();
            }
            
            initMachineLearningPredictor() {
                // TensorFlow.js Model for Error Prediction
                this.errorModel = tf.sequential({
                    layers: [
                        tf.layers.dense({units: 8, inputShape: [4]}),
                        tf.layers.dense({units: 4, activation: 'relu'}),
                        tf.layers.dense({units: 1, activation: 'sigmoid'})
                    ]
                });
                
                this.errorModel.compile({
                    optimizer: 'adam',
                    loss: 'binaryCrossentropy'
                });
            }
            
            async predictPacketSuccess(environmentFactors) {
                const prediction = this.errorModel.predict(
                    tf.tensor2d([environmentFactors])
                );
                return prediction.dataSync()[0];
            }
        }

        // Main Application Controller
        class AppController {
            constructor() {
                this.initScene();
                this.initUI();
                this.initEventHandlers();
                this.startPerformanceMonitoring();
            }
            
            initScene() {
                this.quantumScene = new QuantumScene();
                this.protocolEngine = new QuantumProtocolEngine();
                this.initDataVisualization();
            }
            
            initDataVisualization() {
                // WebGL-based Data Stream Visualization
                this.dataStream = new THREE.LineSegments(
                    new THREE.BufferGeometry(),
                    new THREE.LineBasicMaterial({
                        color: 0x4fd1ff,
                        transparent: true,
                        opacity: 0.8
                    })
                );
                
                this.quantumScene.scene.add(this.dataStream);
                
                // Real-time Geometry Updates
                this.streamPositions = new Float32Array(600);
                this.dataStream.geometry.setAttribute(
                    'position',
                    new THREE.BufferAttribute(this.streamPositions, 3)
                );
            }
            
            initUI() {
                // Reactive UI Components
                this.dashboard = new HoloDashboard({
                    metrics: ['Throughput', 'Latency', 'Packet Loss'],
                    renderTo: '#telemetry-panel'
                });
                
                this.commandInterface = new GestureController(
                    '#holographic-console'
                );
            }
            
            handleTransmission(packet) {
                // Quantum Encryption Simulation
                const encryptedPacket = this.quantumEncrypt(packet);
                
                // Create Three.js Packet Visualization
                const packetGeometry = new THREE.SphereGeometry(0.2, 8, 8);
                const packetMaterial = new THREE.MeshBasicMaterial({
                    color: 0xff5555
                });
                const packetMesh = new THREE.Mesh(packetGeometry, packetMaterial);
                
                // Animate through GSAP and Three.js
                this.animatePacket(packetMesh, () => {
                    this.handleAcknowledge(encryptedPacket);
                });
            }
            
            quantumEncrypt(data) {
                // Simulated Quantum Key Distribution
                const key = new Uint8Array(32);
                window.crypto.getRandomValues(key);
                return { data, key };
            }
        }

        // Initialize Application
        const app = new AppController();

        // Advanced Animation System
        class QuantumAnimationSystem {
            constructor() {
                this.activeTweens = new Set();
                this.particlePools = {
                    ack: new ParticlePool(1000, '#55ff55'),
                    data: new ParticlePool(5000, '#4fd1ff')
                };
            }
            
            animatePacket(packetMesh, onComplete) {
                const trajectory = new THREE.CatmullRomCurve3([
                    new THREE.Vector3(0, 0, 0),
                    new THREE.Vector3(5, 3, 2),
                    new THREE.Vector3(10, 0, 5)
                ]);
                
                new TWEEN.Tween({ t: 0 })
                    .to({ t: 1 }, 2000)
                    .onUpdate(({ t }) => {
                        const position = trajectory.getPoint(t);
                        packetMesh.position.copy(position);
                    })
                    .onComplete(() => {
                        onComplete();
                        packetMesh.geometry.dispose();
                        packetMesh.material.dispose();
                        scene.remove(packetMesh);
                    })
                    .start();
            }
        }

        // ----------------------------
// Network Protocol State Machines
// ----------------------------
class ProtocolStateMachine {
  constructor() {
    this.states = {
      IDLE: 0,
      WAIT_ACK: 1,
      ERROR_RECOVERY: 2,
      RATE_CONTROL: 3
    };
    
    this.currentState = this.states.IDLE;
    this.timeoutHandlers = new Map();
    this.sequenceNumber = 0;
  }

  transition(event) {
    const transitions = {
      [this.states.IDLE]: {
        SEND_REQUEST: () => {
          this.sendPacket();
          this.currentState = this.states.WAIT_ACK;
          this.startTimeout();
        }
      },
      [this.states.WAIT_ACK]: {
        ACK_RECEIVED: () => {
          this.clearTimeout();
          this.sequenceNumber ^= 1; // Toggle sequence
          this.currentState = this.states.IDLE;
          this.emit('packet_success');
        },
        TIMEOUT: () => {
          this.currentState = this.states.ERROR_RECOVERY;
          this.emit('retransmit');
        }
      },
      [this.states.ERROR_RECOVERY]: {
        RETRY_SUCCESS: () => {
          this.currentState = this.states.RATE_CONTROL;
          this.adjustTransmissionRate();
        },
        MAX_RETRIES: () => {
          this.currentState = this.states.IDLE;
          this.emit('fatal_error');
        }
      }
    };

    transitions[this.currentState][event]?.();
  }

  startTimeout() {
    const timer = setTimeout(() => {
      this.transition('TIMEOUT');
    }, this.calculateDynamicTimeout());
    this.timeoutHandlers.set(this.sequenceNumber, timer);
  }

  calculateDynamicTimeout() {
    const baseLatency = 1500; // ms
    const jitter = performance.now() % 300;
    return baseLatency + jitter + (this.errorCount * 200);
  }
}

// ----------------------------
// Advanced Error Correction
// ----------------------------
class QuantumErrorCorrector {
  constructor() {
    this.codec = new ReedSolomonEncoder(QR_CODE_FIELD_256);
    this.interleaver = new BlockInterleaver(152, 256);
    this.convolutional = new ConvEncoder([0o7, 0o5]);
  }

  encode(packet) {
    const convEncoded = this.convolutional.encode(packet);
    const rsEncoded = this.codec.encode(convEncoded);
    return this.interleaver.interleave(rsEncoded);
  }

  decode(data) {
    try {
      const deinterleaved = this.interleaver.deinterleave(data);
      const rsDecoded = this.codec.decode(deinterleaved);
      return this.convolutional.decode(rsDecoded);
    } catch (error) {
      this.attemptQuantumCorrection(data);
    }
  }

  attemptQuantumCorrection(data) {
    const qubits = this.entangleQubits(data);
    return this.measureStabilizers(qubits);
  }
}

// ----------------------------
// Machine Learning Predictors
// ----------------------------
class ChannelPredictor {
  async initializeModel() {
    this.model = await tf.loadLayersModel('models/channel-prediction.json');
    this.scaler = new StandardScaler();
    await this.scaler.load('scalers/channel-scales.bin');
  }

  async predictChannelConditions() {
    const features = await this.collectEnvironmentalFeatures();
    const tensor = this.scaler.transform(tf.tensor2d([features]));
    
    const prediction = this.model.predict(tensor);
    const [throughput, latency, errorProb] = prediction.dataSync();
    
    return { throughput, latency, errorProb };
  }

  async collectEnvironmentalFeatures() {
    return [
      this.solarRadiationLevel,
      this.ionosphericActivity,
      this.dopplerShift,
      this.antennaAlignment
    ];
  }
}

// ----------------------------
// Quantum Channel Simulation
// ----------------------------
class QuantumChannel {
  constructor() {
    this.entanglementPairs = new Map();
    this.initializeQuantumBackbone();
  }

  async initializeQuantumBackbone() {
    this.backboneConnection = await this.createEntangledPairs(1000);
    this.distributeEPRPairs();
  }

  async sendQuantumMessage(message) {
    const qubits = this.encodePhotons(message);
    const measurementBases = this.generateRandomBases(qubits.length);
    
    return {
      qubits,
      bases: measurementBases,
      sentAt: performance.now()
    };
  }

  detectEavesdropping(transmission) {
    const errorRate = this.calculateErrorRate(
      transmission.originalBases,
      transmission.receivedBases
    );
    
    return errorRate > QUANTUM_ERROR_THRESHOLD;
  }
}

// ----------------------------
// Multiplayer Collaboration
// ----------------------------
class CollaborationEngine {
  constructor() {
    this.rtcConnection = new RTCPeerConnection(ICE_CONFIG);
    this.dataChannel = this.rtcConnection.createDataChannel('simData');
    this.setupSignalingServer();
  }

  setupSignalingServer() {
    this.socket = io('https://signaling.quantum-sim.com');
    this.socket.on('offer', async offer => {
      await this.rtcConnection.setRemoteDescription(offer);
      const answer = await this.rtcConnection.createAnswer();
      await this.rtcConnection.setLocalDescription(answer);
      this.socket.emit('answer', answer);
    });
  }

  syncSimulationState(state) {
    const compressed = LZ4.compress(state);
    this.dataChannel.send(compressed);
  }
}

// ----------------------------
// Performance Optimization
// ----------------------------
class RenderPipelineOptimizer {
  constructor() {
    this.frameBudget = 16; // ms
    this.taskQueue = new PriorityQueue({
      comparator: (a, b) => a.priority - b.priority
    });
    
    this.initWebGL2Optimizations();
  }

  initWebGL2Optimizations() {
    this.vaoCache = new VAOCache(gl);
    this.texturePool = new TexturePool(gl);
    this.shaderCache = new ShaderProgramCache(gl);
  }

  scheduleTask(task) {
    this.taskQueue.queue(task);
    this.processTasks();
  }

  async processTasks() {
    while (this.taskQueue.length > 0) {
      const task = this.taskQueue.dequeue();
      const startTime = performance.now();
      
      await task.execute();
      
      const elapsed = performance.now() - startTime;
      this.adjustScheduler(elapsed);
    }
  }
}

// ----------------------------
// Satellite Constellation Management
// ----------------------------
class ConstellationController {
  constructor() {
    this.satellites = new Map();
    this.ephemerisData = new Ephemeris();
    this.orbitalPlanes = 6;
    this.satsPerPlane = 11;
    
    this.initializeWalkerDelta();
  }

  initializeWalkerDelta() {
    const inclination = 53; // Degrees
    const altitude = 550; // Kilometers
    const phasing = 360 / (this.orbitalPlanes * this.satsPerPlane);

    for (let plane = 0; plane < this.orbitalPlanes; plane++) {
      for (let sat = 0; sat < this.satsPerPlane; sat++) {
        const satId = `${plane}-${sat}`;
        const params = {
          semiMajorAxis: altitude + EARTH_RADIUS,
          eccentricity: 0.001,
          inclination,
          raan: plane * 360 / this.orbitalPlanes,
          argOfPerigee: 0,
          trueAnomaly: sat * phasing
        };
        
        this.satellites.set(satId, new Satellite(params));
      }
    }
  }

  updateConstellation(dt) {
    this.satellites.forEach(sat => {
      const [position, velocity] = this.ephemerisData.propagate(
        sat.orbitalElements,
        dt
      );
      
      sat.updatePosition(position);
      sat.updateVelocity(velocity);
    });
  }
}

// ----------------------------
// Security Layer
// ----------------------------
class QuantumSecurityModule {
  constructor() {
    this.sessionKeys = new Map();
    this.initializeQKD();
  }

  async initializeQKD() {
    this.qkdChannel = new QuantumChannel();
    const rawKey = await this.qkdChannel.establishKey(256);
    this.sessionKey = await this.processRawKey(rawKey);
  }

  async processRawKey(rawKey) {
    const authenticated = await this.authenticateKey(rawKey);
    return this.privacyAmplify(authenticated);
  }

  async encryptMessage(message) {
    const iv = crypto.getRandomValues(new Uint8Array(12));
    const cipher = await crypto.subtle.encrypt(
      { name: 'AES-GCM', iv },
      this.sessionKey,
      new TextEncoder().encode(message)
    );
    
    return { iv, cipher };
  }
}
    </script>
</body>
</html>