// Fade Green Blue preset for LEDLab

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

class FadeGreenBluePreset extends BasePreset {
  constructor(width = 16, height = 16) {
    super(width, height);
    this.tick = 0;
    this.defaultParameters = {
      speed: 0.5, // cycles per second
      brightness: 1.0,
    };
  }

  renderFrame() {
    const frame = createFrame(this.width, this.height);
    const timeSeconds = (this.tick * 0.016); // Assume 60 FPS
    const phase = timeSeconds * this.getParameter('speed') * Math.PI * 2;
    const blend = (Math.sin(phase) + 1) * 0.5; // 0..1

    const brightness = this.getParameter('brightness') || 1.0;
    const green = Math.round(255 * (1 - blend) * brightness);
    const blue = Math.round(255 * blend * brightness);

    const gHex = green.toString(16).padStart(2, '0');
    const bHex = blue.toString(16).padStart(2, '0');

    for (let i = 0; i < frame.length; i++) {
      frame[i] = '00' + gHex + bHex;
    }

    this.tick++;
    return frame;
  }

  getMetadata() {
    return {
      name: 'Fade Green Blue',
      description: 'Smooth fade between green and blue colors',
      parameters: {
        speed: { type: 'range', min: 0.1, max: 2.0, step: 0.1, default: 0.5 },
        brightness: { type: 'range', min: 0.1, max: 1.0, step: 0.1, default: 1.0 },
      },
      width: this.width,
      height: this.height,
    };
  }
}

module.exports = FadeGreenBluePreset;