/**
 * Cyber Network Background Animation
 * Generiert dynamisch ein animiertes Netzwerk für den Hintergrund
 */

class CyberNetwork {
  constructor(options = {}) {
    this.options = {
      container: options.container || document.body,
      nodeCount: options.nodeCount || 30,
      connectionCount: options.connectionCount || 50,
      packetCount: options.packetCount || 15,
      animationSpeed: options.animationSpeed || 1.0,
      ...options
    };
    
    this.nodes = [];
    this.connections = [];
    this.packets = [];
    this.initialized = false;
    
    this.containerElement = null;
    this.networkGridElement = null;
    this.glowOverlayElement = null;
  }
  
  init() {
    if (this.initialized) return;
    
    // Container erstellen
    this.containerElement = document.createElement('div');
    this.containerElement.className = 'cyber-network-bg';
    
    // Grid erstellen
    this.networkGridElement = document.createElement('div');
    this.networkGridElement.className = 'network-grid';
    this.containerElement.appendChild(this.networkGridElement);
    
    // Glow Overlay erstellen
    this.glowOverlayElement = document.createElement('div');
    this.glowOverlayElement.className = 'glow-overlay';
    this.containerElement.appendChild(this.glowOverlayElement);
    
    // Nodes generieren
    this.generateNodes();
    
    // Connections generieren
    this.generateConnections();
    
    // Data packets generieren
    this.generateDataPackets();
    
    // Container zum DOM hinzufügen
    if (typeof this.options.container === 'string') {
      const container = document.querySelector(this.options.container);
      if (container) {
        container.appendChild(this.containerElement);
      } else {
        document.body.appendChild(this.containerElement);
      }
    } else {
      this.options.container.appendChild(this.containerElement);
    }
    
    this.initialized = true;
    
    // Animation starten
    window.addEventListener('resize', this.handleResize.bind(this));
    this.startAnimationCycle();
  }
  
  generateNodes() {
    const containerWidth = window.innerWidth;
    const containerHeight = window.innerHeight;
    
    for (let i = 0; i < this.options.nodeCount; i++) {
      const x = Math.random() * containerWidth;
      const y = Math.random() * containerHeight;
      
      const node = document.createElement('div');
      node.className = 'node';
      node.style.left = `${x}px`;
      node.style.top = `${y}px`;
      
      // Größen-Variation für visuelle Tiefe
      const size = 2 + Math.random() * 4;
      node.style.width = `${size}px`;
      node.style.height = `${size}px`;
      
      // Speichern der Position für spätere Referenz
      node._data = { x, y, size };
      
      this.containerElement.appendChild(node);
      this.nodes.push(node);
    }
  }
  
  generateConnections() {
    for (let i = 0; i < this.options.connectionCount; i++) {
      // Zufällige Nodes auswählen
      const startNodeIndex = Math.floor(Math.random() * this.nodes.length);
      let endNodeIndex;
      do {
        endNodeIndex = Math.floor(Math.random() * this.nodes.length);
      } while (endNodeIndex === startNodeIndex);
      
      const startNode = this.nodes[startNodeIndex];
      const endNode = this.nodes[endNodeIndex];
      const startData = startNode._data;
      const endData = endNode._data;
      
      // Verbindung erstellen
      const connection = document.createElement('div');
      connection.className = 'connection';
      
      // Position und Rotation berechnen
      const dx = endData.x - startData.x;
      const dy = endData.y - startData.y;
      const length = Math.sqrt(dx * dx + dy * dy);
      const angle = Math.atan2(dy, dx) * (180 / Math.PI);
      
      connection.style.width = `${length}px`;
      connection.style.left = `${startData.x}px`;
      connection.style.top = `${startData.y}px`;
      connection.style.transform = `rotate(${angle}deg)`;
      
      // Variation in der Animations-Geschwindigkeit
      connection.style.animationDuration = `${3 + Math.random() * 4}s`;
      
      // Speichern der verbundenen Nodes
      connection._data = { 
        startNode: startNodeIndex, 
        endNode: endNodeIndex,
        length
      };
      
      this.containerElement.appendChild(connection);
      this.connections.push(connection);
    }
  }
  
  generateDataPackets() {
    for (let i = 0; i < this.options.packetCount; i++) {
      this.createNewDataPacket();
    }
  }
  
  createNewDataPacket() {
    if (this.connections.length === 0) return;
    
    // Zufällige Verbindung auswählen
    const connectionIndex = Math.floor(Math.random() * this.connections.length);
    const connection = this.connections[connectionIndex];
    const connectionData = connection._data;
    
    const startNode = this.nodes[connectionData.startNode];
    const startData = startNode._data;
    
    // Data Packet erstellen
    const packet = document.createElement('div');
    packet.className = 'data-packet';
    
    // Position auf dem Startknoten
    packet.style.left = `${startData.x}px`;
    packet.style.top = `${startData.y}px`;
    
    // Zufällige Geschwindigkeit
    const travelTime = (4 + Math.random() * 4) / this.options.animationSpeed;
    packet.style.setProperty('--travel-time', `${travelTime}s`);
    
    // Ziel-Koordinaten berechnen
    const endNode = this.nodes[connectionData.endNode];
    const endData = endNode._data;
    const travelX = endData.x - startData.x;
    const travelY = endData.y - startData.y;
    
    packet.style.setProperty('--travel-x', `${travelX}px`);
    packet.style.setProperty('--travel-y', `${travelY}px`);
    
    // Farb-Variation
    if (Math.random() > 0.5) {
      packet.style.background = 'rgba(76, 223, 255, 0.8)'; // Akzentfarbe
    }
    
    this.containerElement.appendChild(packet);
    this.packets.push(packet);
    
    // Nach Ende der Animation neues Paket erstellen
    setTimeout(() => {
      if (this.containerElement.contains(packet)) {
        this.containerElement.removeChild(packet);
      }
      
      const index = this.packets.indexOf(packet);
      if (index > -1) {
        this.packets.splice(index, 1);
        this.createNewDataPacket();
      }
    }, travelTime * 1000);
  }
  
  handleResize() {
    if (!this.initialized) return;
    
    // Bei Größenänderung alles neu generieren
    this.reset();
    this.init();
  }
  
  reset() {
    if (!this.initialized) return;
    
    // Alle Elemente entfernen
    this.nodes.forEach(node => node.remove());
    this.connections.forEach(connection => connection.remove());
    this.packets.forEach(packet => packet.remove());
    
    this.nodes = [];
    this.connections = [];
    this.packets = [];
    
    if (this.containerElement) {
      this.containerElement.remove();
    }
    
    this.initialized = false;
  }
  
  startAnimationCycle() {
    // Regelmäßig neue Pakete erstellen für mehr Dynamik
    setInterval(() => {
      if (this.packets.length < this.options.packetCount * 1.5) {
        this.createNewDataPacket();
      }
    }, 1000 / this.options.animationSpeed);
  }
}

// Exportieren als Modul
export default CyberNetwork;