// Segments are an array [ [start, end], … ]
module.exports.sortSegments = (segments) => {
  segments.sort((segment1, segment2) =>
    segment1[0] === segment2[0]
      ? segment1[1] - segment2[1]
      : segment1[0] - segment2[0],
  );

  const compiledSegments = [];
  let currentSegment;

  for (const segment of segments) {
    if (!currentSegment) {
      currentSegment = segment;
      continue;
    }

    if (currentSegment[1] < segment[0]) {
      compiledSegments.push(currentSegment);
      currentSegment = segment;
      continue;
    }

    currentSegment[1] = Math.max(currentSegment[1], segment[1]);
  }

  compiledSegments.push(currentSegment);

  return compiledSegments;
};