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

  let width = store.get('pocketWidth')
  let depth = store.get('pocketDepth')

  points.topLeft = new Point(0, 0)
  points.topRight = new Point(width, 0)
  points.bottomLeft = new Point(0, depth)
  points.bottomRight = new Point(width, depth)
  // Add foldover points
  points.edgeLeft = points.bottomLeft.shiftFractionTowards(
    points.topLeft,
    1 + options.pocketFoldover
  )
  points.edgeRight = new Point(points.topRight.x, points.edgeLeft.y)

  // Round the pocket
  if (options.frontPocketRadius > 0) {
    macro('round', {
      from: points.topLeft,
      to: points.bottomRight,
      via: points.bottomLeft,
      radius: width * options.frontPocketRadius,
      prefix: 'left',
    })
    macro('round', {
      from: points.bottomLeft,
      to: points.topRight,
      via: points.bottomRight,
      radius: width * options.frontPocketRadius,
      prefix: 'right',
    })
  }

  // Paths
  if (options.frontPocketRadius > 0) {
    paths.seam = new Path()
      .move(points.edgeLeft)
      .line(points.leftStart)
      .curve(points.leftCp1, points.leftCp2, points.leftEnd)
      .line(points.rightStart)
      .curve(points.rightCp1, points.rightCp2, points.rightEnd)
      .line(points.edgeRight)
      .line(points.edgeLeft)
      .close()
      .attr('class', 'fabric')
  } else {
    paths.seam = new Path()
      .move(points.edgeLeft)
      .line(points.bottomLeft)
      .line(points.bottomRight)
      .line(points.edgeRight)
      .line(points.edgeLeft)
      .close()
      .attr('class', 'fabric')
  }
  paths.fold = new Path().move(points.topLeft).line(points.topRight).attr('class', 'fabric dashed')

  if (complete) {
    // Title
    points.title = points.topLeft.shiftFractionTowards(points.bottomRight, 0.5)
    macro('title', {
      at: points.title,
      nr: 9,
      title: 'pocket',
    })

    // Instructions
    paths.fold.attr('data-text', 'foldAlongThisLine').attr('data-text-class', 'center')

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

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

    if (paperless) {
      macro('hd', {
        from: points.edgeLeft,
        to: points.edgeRight,
        y: points.edgeLeft.y - sa - 15,
      })
      let corner = points.bottomRight
      if (options.frontPocketRadius > 0) corner = points.rightStart
      macro('vd', {
        from: corner,
        to: points.topRight,
        x: points.edgeRight.x + sa + 15,
      })
      macro('vd', {
        from: corner,
        to: points.edgeRight,
        x: points.edgeRight.x + sa + 30,
      })
    }
  }

  return part
}