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

  // define some variables

  let width
  if (options.width === 'ToElbow') {
    width = measurements.shoulderToElbow
  }
  if (options.width === 'ToMidArm') {
    width = measurements.shoulderToElbow / 2
  }
  if (options.width === 'ToShoulder') {
    width = 0
  } // careful! takes other measurements if those are bigger to ensure that the tunica actually fits your body, use forceWidth if you know what you're doing

  let hem_pos
  if (options.length === 'ToKnee') {
    hem_pos = measurements.waistToKnee
  }
  if (options.length === 'ToMidLeg') {
    hem_pos = measurements.waistToKnee / 1.3
  } //UpperLeg}
  if (options.length === 'ToFloor') {
    hem_pos = measurements.waistToFloor * 0.95
  }

  let hwidth = (measurements.shoulderToShoulder / 2 + width) * options.widthBonus
  let length = (measurements.hpsToWaistBack + hem_pos) * options.lengthBonus
  let hhead = (measurements.head / 4) * options.headRatio
  let armhole = (measurements.biceps / 2) * 1.3 * options.armholeDrop
  let clavusPos = hhead * options.clavusPosBonus
  let clavusWidth = (options.clavusWidth * hwidth) / 13 / options.widthBonus

  // some checks, can be circumvented with forceWidth
  if (options.forceWidth === false) {
    if (hwidth < measurements.waist / 4) {
      hwidth = (measurements.waist / 4) * options.widthBonus
    }
    if (hwidth < measurements.hips / 4) {
      hwidth = (measurements.hips / 4) * options.widthBonus
    }
    if (hwidth < measurements.chest / 4) {
      hwidth = (measurements.chest / 4) * options.widthBonus
    }
    if (hwidth < measurements.seat / 4) {
      hwidth = (measurements.seat / 4) * options.widthBonus
    }
  }

  // make points
  points.top = new Point(0, 0)
  points.bottom = new Point(0, length)
  points.topLeft = points.top.shift(0, -hwidth)
  points.bottomLeft = points.bottom.shift(0, points.bottom.dx(points.topLeft))
  points.headLeft = points.top.shift(180, hhead)
  points.armholeLeft = points.topLeft.shift(-90, armhole)

  // draw paths
  paths.seam = new Path()
    .move(points.top)
    .line(points.topLeft)
    .line(points.bottomLeft)
    .attr('class', 'fabric')

  paths.hem = new Path().move(points.bottomLeft).line(points.bottom).attr('class', 'fabric')

  paths.fold = new Path().move(points.bottom).line(points.top).attr('class', 'fabric')

  // clavi
  if (options.clavi) {
    // make points
    points.clavusTopRight = points.top.shift(180, clavusPos)
    points.clavusBottomRight = points.bottom.shift(0, points.top.dx(points.clavusTopRight))
    points.clavusTopLeft = points.clavusTopRight.shift(180, clavusWidth)
    points.clavusBottomLeft = points.bottom.shift(0, points.top.dx(points.clavusTopLeft))

    // draw paths
    paths.clavusRight = new Path()
      .move(points.clavusTopRight)
      .line(points.clavusBottomRight)
      .attr('class', 'various dashed')
    paths.clavusLeft = new Path()
      .move(points.clavusTopLeft)
      .line(points.clavusBottomLeft)
      .attr('class', 'various dashed')
      .attr('data-text', 'BiasTape')
      .attr('data-text-class', 'center fill-various')
  }

  // Complete?
  if (complete) {
    // notches
    snippets.hl = new Snippet('notch', points.headLeft)
    snippets.al = new Snippet('notch', points.armholeLeft)

    // cut on fold
    macro('cutonfold', {
      from: points.bottom,
      to: points.top,
      grainline: true,
    })

    // logo & title
    points.logo = points.top.shift(45, points.bottom.dy(points.top) / 3)
    snippets.logo = new Snippet('logo', points.logo)
    points.title = points.logo.shift(90, points.bottom.dy(points.top) / 4)
    macro('title', {
      at: points.title,
      nr: 1,
      title: 'tunica',
    })
    points.__titleNr.attr('data-text-class', 'center')
    points.__titleName.attr('data-text-class', 'center')
    points.__titlePattern.attr('data-text-class', 'center')

    // scalebox
    points.scalebox = points.title.shift(90, points.bottom.dy(points.top) / 5)
    macro('scalebox', { at: points.scalebox })

    // seam allowance
    if (sa) {
      paths.sa = paths.seam
        .offset(sa)
        .join(paths.hem.offset(sa * 2.5))
        .close()
        .attr('class', 'fabric sa')
    }

    // Paperless?
    if (paperless) {
      macro('vd', {
        from: points.top,
        to: points.bottom,
        x: points.bottomLeft.x + 10,
      })

      macro('vd', {
        from: points.armholeLeft,
        to: points.bottomLeft,
        x: points.armholeLeft.x - 15,
      })
      macro('vd', {
        from: points.topLeft,
        to: points.armholeLeft,
        x: points.armholeLeft.x - 15,
      })

      macro('hd', {
        from: points.topLeft,
        to: points.top,
        y: points.top.y + 15,
      })

      macro('hd', {
        from: points.headLeft,
        to: points.top,
        y: points.top.y - 15,
      })
      macro('hd', {
        from: points.topLeft,
        to: points.headLeft,
        y: points.top.y - 15,
      })

      // for clavi
      if (options.clavi) {
        macro('hd', {
          from: points.clavusTopLeft,
          to: points.clavusTopRight,
          y: points.clavusTopLeft.y + 25,
        })
        macro('hd', {
          from: points.clavusTopRight,
          to: points.headLeft,
          y: points.clavusTopRight.y + 25,
        })
        macro('hd', {
          from: points.topLeft,
          to: points.clavusTopLeft,
          y: points.clavusTopLeft.y + 25,
        })
        macro('hd', {
          from: points.clavusTopRight,
          to: points.top,
          y: points.clavusTopLeft.y + 30,
        })
      }
    }
  }
  return part
}