import type { CoreShaderType } from '../../renderers/CoreShaderNode.js';
import type { Vec4 } from '../../renderers/webgl/internal/ShaderUtils.js';
import { validateArrayLength4 } from '../utils.js';

/**
 * Properties of the {@link RoundedRectangle} shader
 */
export interface RoundedProps {
  /**
   * Corner radius, in pixels, to cut out of the corners
   *
   * @defaultValue 0
   */
  radius: number | number[];
  /**
   * sets top-left corner
   */
  'top-left': number;
  /**
   * sets top-right corner
   */
  'top-right': number;
  /**
   * sets bottom-right corner
   */
  'bottom-right': number;
  /**
   * sets bottom-left corner
   */
  'bottom-left': number;
}

export const RoundedTemplate: CoreShaderType<RoundedProps> = {
  props: {
    radius: {
      default: [0, 0, 0, 0],
      resolve(value) {
        if (value !== undefined) {
          return validateArrayLength4(value);
        }
        return ([] as number[]).concat(this.default);
      },
    },
    'top-left': {
      default: 0,
      set(value, props) {
        (props.radius as Vec4)[0] = value;
      },
      get(props) {
        return (props.radius as Vec4)[0];
      },
    },
    'top-right': {
      default: 0,
      set(value, props) {
        (props.radius as Vec4)[1] = value;
      },
      get(props) {
        return (props.radius as Vec4)[1];
      },
    },
    'bottom-right': {
      default: 0,
      set(value, props) {
        (props.radius as Vec4)[2] = value;
      },
      get(props) {
        return (props.radius as Vec4)[2];
      },
    },
    'bottom-left': {
      default: 0,
      set(value, props) {
        (props.radius as Vec4)[3] = value;
      },
      get(props) {
        return (props.radius as Vec4)[3];
      },
    },
  },
};