export default function(part) {
  let {
    paperless,
    sa,
    store,
    complete,
    points,
    options,
    macro,
    Point,
    paths,
    Path
  } = part.shorthand()

  let width = store.get('chestPocketWidth')
  let height = store.get('chestPocketWeltHeight')
  let angle = options.chestPocketAngle

  points.anchor = new Point(0, 0)
  points.top = points.anchor.shift(90 - angle, height / 2)
  points.bottom = points.anchor.shift(-90 - angle, height / 2)
  points.topLeft = points.top.shift(180, width / 2)
  points.topRight = points.topLeft.rotate(180, points.top)
  points.bottomLeft = points.bottom.shift(180, width / 2)
  points.bottomRight = points.bottomLeft.rotate(180, points.bottom)
  points.foldLeft = points.bottomLeft.flipY(points.topLeft)
  points.foldRight = points.bottomRight.flipY(points.topLeft)

  // Paths
  paths.seam = new Path()
    .move(points.foldLeft)
    .line(points.topLeft)
    .line(points.bottomLeft)
    .line(points.bottomRight)
    .line(points.topRight)
    .line(points.foldRight)
    .line(points.foldLeft)
    .close()
    .attr('class', 'fabric')

  paths.fold = new Path()
    .move(points.topLeft)
    .line(points.topRight)
    .attr('class', 'stroke-sm dashed')

  if (complete) {
    // Title
    macro('title', {
      at: points.top,
      nr: 11,
      title: 'chestPocketWelt'
    })

    // Grainline
    macro('grainline', {
      from: points.bottomLeft.shift(0, 10),
      to: points.bottomLeft.shiftFractionTowards(points.topLeft, 2).shift(0, 10)
    })

    if (sa) paths.sa = paths.seam.offset(sa).attr('class', 'fabric sa')

    if (paperless) {
      macro('hd', {
        from: points.foldLeft,
        to: points.foldRight,
        y: points.foldLeft.y - sa - 15
      })
      macro('vd', {
        from: points.bottomRight,
        to: points.foldRight,
        x: points.bottomRight.x + sa + 15
      })
    }
  }

  return part
}