// Rainbow preset for LEDLab

const BasePreset = require('./base-preset');
const { createFrame, wheel } = require('./frame-utils');

class RainbowPreset extends BasePreset {
  constructor(width = 16, height = 16) {
    super(width, height);
    this.defaultParameters = {
      speed: 1,
      brightness: 1.0,
      offset: 0,
    };
  }

  renderFrame() {
    const frame = createFrame(this.width, this.height);
    const speed = this.getParameter('speed') || 1;
    const brightness = this.getParameter('brightness') || 1.0;
    const offset = (this.getParameter('offset') || 0) + this.frameCount * speed;

    for (let i = 0; i < frame.length; i++) {
      const colorIndex = (i * 256 / frame.length + offset) & 255;
      const [r, g, b] = wheel(colorIndex);

      // Apply brightness
      const adjustedR = Math.round(r * brightness);
      const adjustedG = Math.round(g * brightness);
      const adjustedB = Math.round(b * brightness);

      frame[i] = adjustedR.toString(16).padStart(2, '0') +
                 adjustedG.toString(16).padStart(2, '0') +
                 adjustedB.toString(16).padStart(2, '0');
    }

    return frame;
  }

  getMetadata() {
    return {
      name: 'Rainbow',
      description: 'Classic rainbow pattern that cycles through colors',
      parameters: {
        speed: { type: 'range', min: 0.1, max: 5.0, step: 0.1, default: 1.0 },
        brightness: { type: 'range', min: 0.1, max: 1.0, step: 0.1, default: 1.0 },
      },
      width: this.width,
      height: this.height,
    };
  }
}

module.exports = RainbowPreset;