// Spiral Bloom preset for LEDLab

const BasePreset = require('./base-preset');
const { createFrame, frameToPayload, hexToRgb, samplePalette, toIndex } = require('./frame-utils');

class SpiralBloomPreset extends BasePreset {
  constructor(width = 16, height = 16) {
    super(width, height);
    this.rotation = 0;
    this.hueShift = 0;
    this.paletteStops = [
      { stop: 0.0, color: hexToRgb('051923') },
      { stop: 0.2, color: hexToRgb('0c4057') },
      { stop: 0.45, color: hexToRgb('1d7a70') },
      { stop: 0.7, color: hexToRgb('39b15f') },
      { stop: 0.88, color: hexToRgb('9dd54c') },
      { stop: 1.0, color: hexToRgb('f7f5bc') },
    ];
    this.defaultParameters = {
      rotationSpeed: 0.7,
      hueSpeed: 0.2,
      spiralArms: 5,
      brightness: 1.0,
    };
  }

  renderFrame() {
    this.rotation += 0.016 * (this.getParameter('rotationSpeed') || 0.7);
    this.hueShift += 0.016 * (this.getParameter('hueSpeed') || 0.2);

    const frame = createFrame(this.width, this.height);
    const brightness = this.getParameter('brightness') || 1.0;
    const spiralArms = this.getParameter('spiralArms') || 5;

    const cx = (this.width - 1) / 2;
    const cy = (this.height - 1) / 2;
    const radiusNorm = Math.hypot(cx, cy) || 1;

    for (let row = 0; row < this.height; ++row) {
      for (let col = 0; col < this.width; ++col) {
        const dx = col - cx;
        const dy = row - cy;
        const radius = Math.hypot(dx, dy) / radiusNorm;
        const angle = Math.atan2(dy, dx);
        const arm = 0.5 + 0.5 * Math.sin(spiralArms * (angle + this.rotation) + this.hueShift * Math.PI * 2);
        const value = Math.min(1, radius * 0.8 + arm * 0.4);

        let color = samplePalette(this.paletteStops, value);

        // Apply brightness
        if (brightness < 1.0) {
          const rgb = hexToRgb(color);
          color = Math.round(rgb.r * brightness).toString(16).padStart(2, '0') +
                  Math.round(rgb.g * brightness).toString(16).padStart(2, '0') +
                  Math.round(rgb.b * brightness).toString(16).padStart(2, '0');
        }

        frame[toIndex(col, row, this.width)] = color;
      }
    }

    return frame;
  }

  getMetadata() {
    return {
      name: 'Spiral Bloom',
      description: 'Rotating spiral patterns blooming outward',
      parameters: {
        rotationSpeed: { type: 'range', min: 0.3, max: 1.5, step: 0.1, default: 0.7 },
        hueSpeed: { type: 'range', min: 0.1, max: 0.5, step: 0.05, default: 0.2 },
        spiralArms: { type: 'range', min: 3, max: 8, step: 1, default: 5 },
        brightness: { type: 'range', min: 0.3, max: 1.0, step: 0.1, default: 1.0 },
      },
      width: this.width,
      height: this.height,
    };
  }
}

module.exports = SpiralBloomPreset;