import getPixelSpacing from './getPixelSpacing'
/**
 * Calculates longest and shortest diameters using measurement handles and pixelSpacing
 * @param  {Object} measurementData
 * @param {Object} pixelSpacing pixelSpacing
 *
 *@returns {Object} longestDiameter and shortestDiameter
 */
export default function calculateLongestAndShortestDiameters(
  measurementData,
  image,
  digits = 1
) {
  const pixelSpacing = getPixelSpacing(image)
  const { rowPixelSpacing, colPixelSpacing } = pixelSpacing
  const {
    start,
    end,
    perpendicularStart,
    perpendicularEnd
  } = measurementData.handles

  // Calculate the long axis length
  const dx = (start.x - end.x) * (colPixelSpacing || 1)
  const dy = (start.y - end.y) * (rowPixelSpacing || 1)
  let length = Math.sqrt(dx * dx + dy * dy)

  // Calculate the short axis length
  const wx =
    (perpendicularStart.x - perpendicularEnd.x) * (colPixelSpacing || 1)
  const wy =
    (perpendicularStart.y - perpendicularEnd.y) * (rowPixelSpacing || 1)
  let width = Math.sqrt(wx * wx + wy * wy)

  if (!width) {
    width = 0
  }

  // Length is always longer than width
  if (width > length) {
    const tempW = width
    const tempL = length

    length = tempW
    width = tempL
  }

  return {
    longestDiameter: length.toFixed(digits),
    shortestDiameter: width.toFixed(digits)
  }
}