import { activeVibe } from '../settings';
import { hexToRgb } from '../utils/hex-to-rgb';
import { type VibeId } from '../vibes';
import { RenderInputs } from './game-loop-types';

export class RenderInputCache {
  private cachedVibeId: VibeId | null = null;
  private cachedRenderInputs?: RenderInputs;
  private previousAccentColor = '';

  public invalidate(): void {
    this.cachedVibeId = null;
    this.cachedRenderInputs = undefined;
  }

  public get(): RenderInputs {
    if (this.cachedRenderInputs && this.cachedVibeId === activeVibe.id) {
      return this.cachedRenderInputs;
    }

    this.cachedVibeId = activeVibe.id;
    this.cachedRenderInputs = {
      channelColors: activeVibe.colors.map(hexToRgb),
      backgroundColor: hexToRgb(activeVibe.backgroundColor),
    };

    return this.cachedRenderInputs;
  }

  public updateAccentColor(color: [number, number, number]): void {
    const accentColor = `rgb(${Math.round(color[0] * 255)},${Math.round(
      color[1] * 255
    )},${Math.round(color[2] * 255)})`;
    if (this.previousAccentColor === accentColor) {
      return;
    }

    this.previousAccentColor = accentColor;
    document.documentElement.style.setProperty('--accent-color', accentColor);
  }
}