/**
 * @name ranges-merge
 * @fileoverview Merge and sort string index ranges
 * @version 7.1.0
 * @author Roy Revelt, Codsen Ltd
 * @license MIT
 * {@link https://codsen.com/os/ranges-merge/}
 */

import { rSort } from 'ranges-sort';

var version$1 = "7.1.0";

const version = version$1;
const defaults = {
  mergeType: 1,
  progressFn: null,
  joinRangesThatTouchEdges: true
};
function rMerge(arrOfRanges, originalOpts) {
  function isObj(something) {
    return something && typeof something === "object" && !Array.isArray(something);
  }
  if (!Array.isArray(arrOfRanges) || !arrOfRanges.length) {
    return null;
  }
  let opts;
  if (originalOpts) {
    if (isObj(originalOpts)) {
      opts = { ...defaults,
        ...originalOpts
      };
      if (opts.progressFn && isObj(opts.progressFn) && !Object.keys(opts.progressFn).length) {
        opts.progressFn = null;
      } else if (opts.progressFn && typeof opts.progressFn !== "function") {
        throw new Error(`ranges-merge: [THROW_ID_01] opts.progressFn must be a function! It was given of a type: "${typeof opts.progressFn}", equal to ${JSON.stringify(opts.progressFn, null, 4)}`);
      }
      if (opts.mergeType && +opts.mergeType !== 1 && +opts.mergeType !== 2) {
        throw new Error(`ranges-merge: [THROW_ID_02] opts.mergeType was customised to a wrong thing! It was given of a type: "${typeof opts.mergeType}", equal to ${JSON.stringify(opts.mergeType, null, 4)}`);
      }
      if (typeof opts.joinRangesThatTouchEdges !== "boolean") {
        throw new Error(`ranges-merge: [THROW_ID_04] opts.joinRangesThatTouchEdges was customised to a wrong thing! It was given of a type: "${typeof opts.joinRangesThatTouchEdges}", equal to ${JSON.stringify(opts.joinRangesThatTouchEdges, null, 4)}`);
      }
    } else {
      throw new Error(`emlint: [THROW_ID_03] the second input argument must be a plain object. It was given as:\n${JSON.stringify(originalOpts, null, 4)} (type ${typeof originalOpts})`);
    }
  } else {
    opts = { ...defaults
    };
  }
  const filtered = arrOfRanges
  .filter(range => range).map(subarr => [...subarr]).filter(
  rangeArr => rangeArr[2] !== undefined || rangeArr[0] !== rangeArr[1]);
  let sortedRanges;
  let lastPercentageDone;
  let percentageDone;
  if (opts.progressFn) {
    sortedRanges = rSort(filtered, {
      progressFn: percentage => {
        percentageDone = Math.floor(percentage / 5);
        if (percentageDone !== lastPercentageDone) {
          lastPercentageDone = percentageDone;
          opts.progressFn(percentageDone);
        }
      }
    });
  } else {
    sortedRanges = rSort(filtered);
  }
  if (!sortedRanges) {
    return null;
  }
  const len = sortedRanges.length - 1;
  for (let i = len; i > 0; i--) {
    if (opts.progressFn) {
      percentageDone = Math.floor((1 - i / len) * 78) + 21;
      if (percentageDone !== lastPercentageDone && percentageDone > lastPercentageDone) {
        lastPercentageDone = percentageDone;
        opts.progressFn(percentageDone);
      }
    }
    if (sortedRanges[i][0] <= sortedRanges[i - 1][0] || !opts.joinRangesThatTouchEdges && sortedRanges[i][0] < sortedRanges[i - 1][1] || opts.joinRangesThatTouchEdges && sortedRanges[i][0] <= sortedRanges[i - 1][1]) {
      sortedRanges[i - 1][0] = Math.min(sortedRanges[i][0], sortedRanges[i - 1][0]);
      sortedRanges[i - 1][1] = Math.max(sortedRanges[i][1], sortedRanges[i - 1][1]);
      if (sortedRanges[i][2] !== undefined && (sortedRanges[i - 1][0] >= sortedRanges[i][0] || sortedRanges[i - 1][1] <= sortedRanges[i][1])) {
        if (sortedRanges[i - 1][2] !== null) {
          if (sortedRanges[i][2] === null && sortedRanges[i - 1][2] !== null) {
            sortedRanges[i - 1][2] = null;
          } else if (sortedRanges[i - 1][2] != null) {
            if (+opts.mergeType === 2 && sortedRanges[i - 1][0] === sortedRanges[i][0]) {
              sortedRanges[i - 1][2] = sortedRanges[i][2];
            } else {
              sortedRanges[i - 1][2] += sortedRanges[i][2];
            }
          } else {
            sortedRanges[i - 1][2] = sortedRanges[i][2];
          }
        }
      }
      sortedRanges.splice(i, 1);
      i = sortedRanges.length;
    }
  }
  return sortedRanges.length ? sortedRanges : null;
}

export { defaults, rMerge, version };