import * as F from 'freesewing'

var base =
{
  draft: function(part, context)
  {

    let { measurements, options, points, paths, snippets } = F.utils.shorthand(part, context);

    // Center back (cb) vertical axis
    points.cbNeck = new F.point(0, options.backNeckCutout);
    points.cbShoulder = new F.point(0, ( measurements.shoulderSlope - options.shoulderSlopeReduction ) / 2);
    points.cbArmhole = new F.point(0, points.cbShoulder.y + (measurements.bicepsCircumference + options.bicepsEase) * options.armholeDepthFactor);
    points.cbWaist = new F.point(0, measurements.centerBackNeckToWaist + options.backNeckCutout);
    points.cbHips = new F.point(0, points.cbWaist.y + measurements.naturalWaistToHip);

    // Side back (cb) vertical axis
    points.armhole = new F.point(measurements.chestCircumference / 4 + options.chestEase / 4, points.cbArmhole.y);
    points.waist = new F.point(points.armhole.x, points.cbWaist.y);
    points.hips = new F.point(points.armhole.x, points.cbHips.y);

    // Shoulder line
    points.neck = new F.point(measurements.neckCircumference / options.collarFactor, 0);
    points.shoulder = new F.point(measurements.shoulderToShoulder / 2 + options.shoulderEase / 2, points.cbShoulder.y);

    // Armhhole
    points.armholePitch = new F.point(measurements.shoulderToShoulder * options.acrossBackFactor / 2, points.shoulder.y + points.shoulder.dy(points.armhole)/2);
    points._tmp1 = new F.point(points.armholePitch.x, points.armhole.y);
    points._tmp2 = points._tmp1.shift(45, 10);
    points._tmp3 = F.utils.beamsCross(points._tmp1, points._tmp2, points.armhole, points.armholePitch);
    points.armholeHollow = points._tmp1.shiftFractionTowards(points._tmp3, 0.5);
    points.armholeCp1 = points.armhole.shift(180, points._tmp1.dx(points.armhole)/4);
    points.armholeCp2 = points.armholeHollow.shift(-45, points.armholeHollow.dy(points.armhole)/2);
    points.armholeHollowCp1 = points.armholeHollow.shift(135, points.armholePitch.dx(points.armholeHollow));
    points.armholeHollowCp2 = points.armholePitch.shift(-90, points.armholePitch.dy(points.armholeHollow)/2);
    points.armholePitchCp1 = points.armholePitch.shift(90, points.shoulder.dy(points.armholePitch)/2);
    points.armholePitchCp2 = points.shoulder.shiftTowards(points.neck, points.shoulder.dy(points.armholePitch)/5).rotate(90, points.shoulder);

    // Neck opening
    points._tmp4 = points.neck.shiftTowards(points.shoulder, 10).rotate(-90, points.neck);
    points.neckCp1 = F.utils.beamCrossesY(points.neck, points._tmp4, points.cbNeck.y);
    points.neckCp2 = points.cbNeck.shift(0, points.cbNeck.dx(points.neck)/2);
  }
}

export default base;