import { TAU } from '../utils/constants'
import { arc } from './Arc'
import { point } from './Point'
import { segment } from './Segment'
import { Polygon } from './Polygon'

/**
 * Class representing a rectangle
 */
export class RoundedRect extends Polygon {
  constructor(x: number, y: number, width: number, height: number, r: number) {
    const edges = [
      segment(x + r, y, x + width - r, y),
      arc(point(x + width - r, y + r), r, TAU * 0.75, TAU, true),
      segment(x + width, y + r, x + width, y + height - r),
      arc(point(x + width - r, y + height - r), r, TAU * 0, TAU * 0.25, true),
      segment(x + width - r, y + height, x + r, y + height),
      arc(point(x + r, y + height - r), r, TAU * 0.25, TAU * 0.5, true),
      segment(x, y + height - r, x, y + r),
      arc(point(x + r, y + r), r, TAU * 0.5, TAU * 0.75, true),
    ]
    super(edges)
  }
}

/**
 * Shortcut to create new rectangle
 */
export const roundedRect = (x: number, y: number, width: number, height: number, radius: number) => {
  return new RoundedRect(x, y, width, height, radius)
}