/**
 * WebGL Visualizer Scene
 * Three.js scene manager with multiple selectable visualizers
 */

import * as THREE from 'three';
import { SphereVisualizer } from './particles.js';
import { TunnelVisualizer } from './tunnel.js';
import { HelixVisualizer } from './helix.js';
import { VortexVisualizer } from './vortex.js';
import { StarfieldVisualizer } from './starfield.js';
import { GridVisualizer } from './grid.js';
import { GalaxyVisualizer } from './galaxy.js';
import { WaveformVisualizer } from './waveform.js';
import { KaleidoscopeVisualizer } from './kaleidoscope.js';

// Available visualizer classes
const VISUALIZERS = [
  SphereVisualizer,
  TunnelVisualizer,
  HelixVisualizer,
  VortexVisualizer,
  StarfieldVisualizer,
  GridVisualizer,
  GalaxyVisualizer,
  WaveformVisualizer,
  KaleidoscopeVisualizer
];

export class Visualizer {
  constructor(canvas, audioManager) {
    this.canvas = canvas;
    this.audioManager = audioManager;
    this.running = false;
    this.time = 0;

    // Mouse tracking (normalized -1 to 1)
    this.mouse = { x: 0, y: 0 };
    this.mouseActive = false;

    // Visualizer management
    this.visualizers = [];
    this.currentIndex = 0;

    if (!canvas) {
      console.warn('Visualizer: No canvas provided');
      return;
    }

    this.init();
  }

  init() {
    // Scene setup
    this.scene = new THREE.Scene();

    // Camera
    this.camera = new THREE.PerspectiveCamera(
      75,
      window.innerWidth / window.innerHeight,
      0.1,
      1000
    );
    this.camera.position.z = 50;

    // Renderer
    this.renderer = new THREE.WebGLRenderer({
      canvas: this.canvas,
      alpha: true,
      antialias: true,
      powerPreference: 'high-performance'
    });
    this.renderer.setSize(window.innerWidth, window.innerHeight);
    this.renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2));

    // Initialize all visualizers
    this.visualizers = VISUALIZERS.map(VisualizerClass => {
      return new VisualizerClass(this.scene);
    });

    // Load saved visualizer preference
    const savedIndex = localStorage.getItem('pivoine-visualizer');
    if (savedIndex !== null) {
      this.currentIndex = parseInt(savedIndex, 10) % this.visualizers.length;
    }

    // Show the current visualizer
    this.visualizers[this.currentIndex].show();

    // Event listeners
    window.addEventListener('resize', () => this.resize());
    window.addEventListener('mousemove', (e) => this.onMouseMove(e));

    // Start animation
    this.start();
  }

  /**
   * Get list of visualizer names
   */
  getVisualizerNames() {
    return VISUALIZERS.map(V => V.name);
  }

  /**
   * Get current visualizer name
   */
  getCurrentName() {
    return VISUALIZERS[this.currentIndex].name;
  }

  /**
   * Get current visualizer index
   */
  getCurrentIndex() {
    return this.currentIndex;
  }

  /**
   * Set active visualizer by index
   */
  setVisualizer(index) {
    if (index < 0 || index >= this.visualizers.length) return;
    if (index === this.currentIndex) return;

    // Hide current
    this.visualizers[this.currentIndex].hide();

    // Show new
    this.currentIndex = index;
    this.visualizers[this.currentIndex].show();

    // Save preference
    localStorage.setItem('pivoine-visualizer', index.toString());
  }

  /**
   * Cycle to next visualizer
   */
  nextVisualizer() {
    const nextIndex = (this.currentIndex + 1) % this.visualizers.length;
    this.setVisualizer(nextIndex);
    return this.getCurrentName();
  }

  /**
   * Cycle to previous visualizer
   */
  prevVisualizer() {
    const prevIndex = (this.currentIndex - 1 + this.visualizers.length) % this.visualizers.length;
    this.setVisualizer(prevIndex);
    return this.getCurrentName();
  }

  onMouseMove(e) {
    // Normalize to -1 to 1 relative to canvas
    const rect = this.canvas.getBoundingClientRect();
    this.mouse.x = ((e.clientX - rect.left) / rect.width) * 2 - 1;
    this.mouse.y = -((e.clientY - rect.top) / rect.height) * 2 + 1;
    this.mouseActive = true;
  }

  resize() {
    if (!this.camera || !this.renderer) return;

    this.camera.aspect = window.innerWidth / window.innerHeight;
    this.camera.updateProjectionMatrix();
    this.renderer.setSize(window.innerWidth, window.innerHeight);
  }

  start() {
    if (this.running) return;
    this.running = true;
    this.animate();
  }

  pause() {
    this.running = false;
  }

  resume() {
    this.start();
  }

  animate() {
    if (!this.running) return;
    requestAnimationFrame(() => this.animate());

    this.time += 0.01;

    // Get audio frequency bands
    let bands = { low: 0, mid: 0, high: 0 };
    if (this.audioManager?.isInitialized) {
      bands = this.audioManager.getFrequencyBands();
    }

    // Update current visualizer with audio data and mouse position
    const currentViz = this.visualizers[this.currentIndex];
    if (currentViz) {
      const mouse = this.mouseActive ? this.mouse : { x: 0, y: 0 };
      currentViz.update(bands, this.time, mouse);
    }

    // Subtle camera movement
    this.camera.position.x = Math.sin(this.time * 0.1) * 3;
    this.camera.position.y = Math.cos(this.time * 0.15) * 2;
    this.camera.lookAt(0, 0, 0);

    this.renderer.render(this.scene, this.camera);
  }

  destroy() {
    this.running = false;
    this.visualizers.forEach(v => v.dispose());
    this.renderer?.dispose();
  }
}

export default Visualizer;