// https://stackoverflow.com/a/6853926/232122
export function distanceBetweenPointAndSegment(
  x: number,
  y: number,
  x1: number,
  y1: number,
  x2: number,
  y2: number
) {
  const A = x - x1;
  const B = y - y1;
  const C = x2 - x1;
  const D = y2 - y1;

  const dot = A * C + B * D;
  const lenSquare = C * C + D * D;
  let param = -1;
  if (lenSquare !== 0) {
    // in case of 0 length line
    param = dot / lenSquare;
  }

  let xx, yy;
  if (param < 0) {
    xx = x1;
    yy = y1;
  } else if (param > 1) {
    xx = x2;
    yy = y2;
  } else {
    xx = x1 + param * C;
    yy = y1 + param * D;
  }

  const dx = x - xx;
  const dy = y - yy;
  return Math.hypot(dx, dy);
}