export interface ITextLocation {
  text: { x: number; y: number };
}

export interface ICircle {
  r: number;
  cx: number;
  cy: number;
}
export interface IEllipse {
  rx: number;
  ry: number;
  rotation: number;
  cx: number;
  cy: number;
}

export interface ITextCircle extends ICircle, ITextLocation {
  align: 'start' | 'end' | 'middle';
  verticalAlign: 'top' | 'bottom';
}
export interface ITextEllipse extends IEllipse, ITextLocation {
  align: 'start' | 'end' | 'middle';
  verticalAlign: 'top' | 'bottom';
}

// could be slice
export interface IArc {
  x2: number;
  y2: number;
  sweep: boolean;
  large: boolean;

  ref: number;
  mode: 'i' | 'o';
}

export interface IArcSlice {
  sets: readonly number[];
  x1: number;
  y1: number;
  arcs: readonly IArc[];
  path?: string;
}

export interface ITextArcSlice extends IArcSlice, ITextLocation {}

export interface IVennDiagramLayout {
  sets: (ITextCircle | ITextEllipse)[];
  intersections: ITextArcSlice[];
}

export function isEllipse(d: ICircle | IEllipse): d is IEllipse {
  return typeof (d as IEllipse).rx === 'number';
}

export interface IBoundingBox {
  x: number;
  y: number;
  width: number;
  height: number;
}