export default (part) => {
  // Shorthand
  let { points, Point, paths, Path, complete, macro, snippets, sa } = part.shorthand()

  // Clean up
  for (let id in paths) delete paths[id]
  for (let id in snippets) delete snippets[id]

  // Anchor for sampling/grid
  points.anchor = points.flyTop.clone()

  paths.saBase = new Path()
    .move(points.fork)
    .curve(points.crotchSeamCurveCp1, points.crotchSeamCurveCp2, points.crotchSeamCurveStart)
    .line(points.styleWaistIn)
    .line(points.flyTop)
    .split(points.flyBottom)
    .pop()
  paths.seam = paths.saBase
    .clone()
    .line(points.flyCurveStart)
    .curve(points.flyCurveCp2, points.flyCurveCp1, points.flyBottom)
    .close()
    .attr('class', 'fabric')

  if (complete) {
    points.grainlineTop = points.flyTop.shiftFractionTowards(points.styleWaistIn, 0.5)
    points.grainlineBottom = new Point(points.grainlineTop.x, points.flyCurveCp2.y)
    macro('grainline', {
      from: points.grainlineTop,
      to: points.grainlineBottom,
    })
    points.titleAnchor = points.grainlineTop.shiftFractionTowards(points.grainlineBottom, 0.5)
    macro('title', {
      at: points.titleAnchor,
      nr: 9,
      title: 'flyFacing',
    })
    if (sa)
      paths.sa = paths.saBase
        .offset(sa)
        .line(points.flyCurveStart)
        .reverse()
        .line(points.flyBottom)
        .attr('class', 'sa fabric')
  }

  return part
}