import { format, plugins } from '@vitest/pretty-format';
import c from 'tinyrainbow';
import { s as stringify } from './chunk-display.js';
import { deepClone, getOwnProperties, getType as getType$1 } from './helpers.js';
import 'loupe';

function getType(value) {
  if (value === void 0) {
    return "undefined";
  } else if (value === null) {
    return "null";
  } else if (Array.isArray(value)) {
    return "array";
  } else if (typeof value === "boolean") {
    return "boolean";
  } else if (typeof value === "function") {
    return "function";
  } else if (typeof value === "number") {
    return "number";
  } else if (typeof value === "string") {
    return "string";
  } else if (typeof value === "bigint") {
    return "bigint";
  } else if (typeof value === "object") {
    if (value != null) {
      if (value.constructor === RegExp) {
        return "regexp";
      } else if (value.constructor === Map) {
        return "map";
      } else if (value.constructor === Set) {
        return "set";
      } else if (value.constructor === Date) {
        return "date";
      }
    }
    return "object";
  } else if (typeof value === "symbol") {
    return "symbol";
  }
  throw new Error(`value of unknown type: ${value}`);
}

const DIFF_DELETE = -1;
const DIFF_INSERT = 1;
const DIFF_EQUAL = 0;
class Diff {
  0;
  1;
  constructor(op, text) {
    this[0] = op;
    this[1] = text;
  }
}
const diff_commonPrefix = function(text1, text2) {
  if (!text1 || !text2 || text1.charAt(0) !== text2.charAt(0)) {
    return 0;
  }
  let pointermin = 0;
  let pointermax = Math.min(text1.length, text2.length);
  let pointermid = pointermax;
  let pointerstart = 0;
  while (pointermin < pointermid) {
    if (text1.substring(pointerstart, pointermid) === text2.substring(pointerstart, pointermid)) {
      pointermin = pointermid;
      pointerstart = pointermin;
    } else {
      pointermax = pointermid;
    }
    pointermid = Math.floor((pointermax - pointermin) / 2 + pointermin);
  }
  return pointermid;
};
const diff_commonSuffix = function(text1, text2) {
  if (!text1 || !text2 || text1.charAt(text1.length - 1) !== text2.charAt(text2.length - 1)) {
    return 0;
  }
  let pointermin = 0;
  let pointermax = Math.min(text1.length, text2.length);
  let pointermid = pointermax;
  let pointerend = 0;
  while (pointermin < pointermid) {
    if (text1.substring(text1.length - pointermid, text1.length - pointerend) === text2.substring(text2.length - pointermid, text2.length - pointerend)) {
      pointermin = pointermid;
      pointerend = pointermin;
    } else {
      pointermax = pointermid;
    }
    pointermid = Math.floor((pointermax - pointermin) / 2 + pointermin);
  }
  return pointermid;
};
const diff_commonOverlap_ = function(text1, text2) {
  const text1_length = text1.length;
  const text2_length = text2.length;
  if (text1_length === 0 || text2_length === 0) {
    return 0;
  }
  if (text1_length > text2_length) {
    text1 = text1.substring(text1_length - text2_length);
  } else if (text1_length < text2_length) {
    text2 = text2.substring(0, text1_length);
  }
  const text_length = Math.min(text1_length, text2_length);
  if (text1 === text2) {
    return text_length;
  }
  let best = 0;
  let length = 1;
  while (true) {
    const pattern = text1.substring(text_length - length);
    const found = text2.indexOf(pattern);
    if (found === -1) {
      return best;
    }
    length += found;
    if (found === 0 || text1.substring(text_length - length) === text2.substring(0, length)) {
      best = length;
      length++;
    }
  }
};
const diff_cleanupSemantic = function(diffs) {
  let changes = false;
  const equalities = [];
  let equalitiesLength = 0;
  let lastEquality = null;
  let pointer = 0;
  let length_insertions1 = 0;
  let length_deletions1 = 0;
  let length_insertions2 = 0;
  let length_deletions2 = 0;
  while (pointer < diffs.length) {
    if (diffs[pointer][0] === DIFF_EQUAL) {
      equalities[equalitiesLength++] = pointer;
      length_insertions1 = length_insertions2;
      length_deletions1 = length_deletions2;
      length_insertions2 = 0;
      length_deletions2 = 0;
      lastEquality = diffs[pointer][1];
    } else {
      if (diffs[pointer][0] === DIFF_INSERT) {
        length_insertions2 += diffs[pointer][1].length;
      } else {
        length_deletions2 += diffs[pointer][1].length;
      }
      if (lastEquality && lastEquality.length <= Math.max(length_insertions1, length_deletions1) && lastEquality.length <= Math.max(length_insertions2, length_deletions2)) {
        diffs.splice(
          equalities[equalitiesLength - 1],
          0,
          new Diff(DIFF_DELETE, lastEquality)
        );
        diffs[equalities[equalitiesLength - 1] + 1][0] = DIFF_INSERT;
        equalitiesLength--;
        equalitiesLength--;
        pointer = equalitiesLength > 0 ? equalities[equalitiesLength - 1] : -1;
        length_insertions1 = 0;
        length_deletions1 = 0;
        length_insertions2 = 0;
        length_deletions2 = 0;
        lastEquality = null;
        changes = true;
      }
    }
    pointer++;
  }
  if (changes) {
    diff_cleanupMerge(diffs);
  }
  diff_cleanupSemanticLossless(diffs);
  pointer = 1;
  while (pointer < diffs.length) {
    if (diffs[pointer - 1][0] === DIFF_DELETE && diffs[pointer][0] === DIFF_INSERT) {
      const deletion = diffs[pointer - 1][1];
      const insertion = diffs[pointer][1];
      const overlap_length1 = diff_commonOverlap_(deletion, insertion);
      const overlap_length2 = diff_commonOverlap_(insertion, deletion);
      if (overlap_length1 >= overlap_length2) {
        if (overlap_length1 >= deletion.length / 2 || overlap_length1 >= insertion.length / 2) {
          diffs.splice(
            pointer,
            0,
            new Diff(DIFF_EQUAL, insertion.substring(0, overlap_length1))
          );
          diffs[pointer - 1][1] = deletion.substring(
            0,
            deletion.length - overlap_length1
          );
          diffs[pointer + 1][1] = insertion.substring(overlap_length1);
          pointer++;
        }
      } else {
        if (overlap_length2 >= deletion.length / 2 || overlap_length2 >= insertion.length / 2) {
          diffs.splice(
            pointer,
            0,
            new Diff(DIFF_EQUAL, deletion.substring(0, overlap_length2))
          );
          diffs[pointer - 1][0] = DIFF_INSERT;
          diffs[pointer - 1][1] = insertion.substring(
            0,
            insertion.length - overlap_length2
          );
          diffs[pointer + 1][0] = DIFF_DELETE;
          diffs[pointer + 1][1] = deletion.substring(overlap_length2);
          pointer++;
        }
      }
      pointer++;
    }
    pointer++;
  }
};
const nonAlphaNumericRegex_ = /[^a-z0-9]/i;
const whitespaceRegex_ = /\s/;
const linebreakRegex_ = /[\r\n]/;
const blanklineEndRegex_ = /\n\r?\n$/;
const blanklineStartRegex_ = /^\r?\n\r?\n/;
function diff_cleanupSemanticLossless(diffs) {
  function diff_cleanupSemanticScore_(one, two) {
    if (!one || !two) {
      return 6;
    }
    const char1 = one.charAt(one.length - 1);
    const char2 = two.charAt(0);
    const nonAlphaNumeric1 = char1.match(nonAlphaNumericRegex_);
    const nonAlphaNumeric2 = char2.match(nonAlphaNumericRegex_);
    const whitespace1 = nonAlphaNumeric1 && char1.match(whitespaceRegex_);
    const whitespace2 = nonAlphaNumeric2 && char2.match(whitespaceRegex_);
    const lineBreak1 = whitespace1 && char1.match(linebreakRegex_);
    const lineBreak2 = whitespace2 && char2.match(linebreakRegex_);
    const blankLine1 = lineBreak1 && one.match(blanklineEndRegex_);
    const blankLine2 = lineBreak2 && two.match(blanklineStartRegex_);
    if (blankLine1 || blankLine2) {
      return 5;
    } else if (lineBreak1 || lineBreak2) {
      return 4;
    } else if (nonAlphaNumeric1 && !whitespace1 && whitespace2) {
      return 3;
    } else if (whitespace1 || whitespace2) {
      return 2;
    } else if (nonAlphaNumeric1 || nonAlphaNumeric2) {
      return 1;
    }
    return 0;
  }
  let pointer = 1;
  while (pointer < diffs.length - 1) {
    if (diffs[pointer - 1][0] === DIFF_EQUAL && diffs[pointer + 1][0] === DIFF_EQUAL) {
      let equality1 = diffs[pointer - 1][1];
      let edit = diffs[pointer][1];
      let equality2 = diffs[pointer + 1][1];
      const commonOffset = diff_commonSuffix(equality1, edit);
      if (commonOffset) {
        const commonString = edit.substring(edit.length - commonOffset);
        equality1 = equality1.substring(0, equality1.length - commonOffset);
        edit = commonString + edit.substring(0, edit.length - commonOffset);
        equality2 = commonString + equality2;
      }
      let bestEquality1 = equality1;
      let bestEdit = edit;
      let bestEquality2 = equality2;
      let bestScore = diff_cleanupSemanticScore_(equality1, edit) + diff_cleanupSemanticScore_(edit, equality2);
      while (edit.charAt(0) === equality2.charAt(0)) {
        equality1 += edit.charAt(0);
        edit = edit.substring(1) + equality2.charAt(0);
        equality2 = equality2.substring(1);
        const score = diff_cleanupSemanticScore_(equality1, edit) + diff_cleanupSemanticScore_(edit, equality2);
        if (score >= bestScore) {
          bestScore = score;
          bestEquality1 = equality1;
          bestEdit = edit;
          bestEquality2 = equality2;
        }
      }
      if (diffs[pointer - 1][1] !== bestEquality1) {
        if (bestEquality1) {
          diffs[pointer - 1][1] = bestEquality1;
        } else {
          diffs.splice(pointer - 1, 1);
          pointer--;
        }
        diffs[pointer][1] = bestEdit;
        if (bestEquality2) {
          diffs[pointer + 1][1] = bestEquality2;
        } else {
          diffs.splice(pointer + 1, 1);
          pointer--;
        }
      }
    }
    pointer++;
  }
}
function diff_cleanupMerge(diffs) {
  diffs.push(new Diff(DIFF_EQUAL, ""));
  let pointer = 0;
  let count_delete = 0;
  let count_insert = 0;
  let text_delete = "";
  let text_insert = "";
  let commonlength;
  while (pointer < diffs.length) {
    switch (diffs[pointer][0]) {
      case DIFF_INSERT:
        count_insert++;
        text_insert += diffs[pointer][1];
        pointer++;
        break;
      case DIFF_DELETE:
        count_delete++;
        text_delete += diffs[pointer][1];
        pointer++;
        break;
      case DIFF_EQUAL:
        if (count_delete + count_insert > 1) {
          if (count_delete !== 0 && count_insert !== 0) {
            commonlength = diff_commonPrefix(text_insert, text_delete);
            if (commonlength !== 0) {
              if (pointer - count_delete - count_insert > 0 && diffs[pointer - count_delete - count_insert - 1][0] === DIFF_EQUAL) {
                diffs[pointer - count_delete - count_insert - 1][1] += text_insert.substring(0, commonlength);
              } else {
                diffs.splice(
                  0,
                  0,
                  new Diff(DIFF_EQUAL, text_insert.substring(0, commonlength))
                );
                pointer++;
              }
              text_insert = text_insert.substring(commonlength);
              text_delete = text_delete.substring(commonlength);
            }
            commonlength = diff_commonSuffix(text_insert, text_delete);
            if (commonlength !== 0) {
              diffs[pointer][1] = text_insert.substring(text_insert.length - commonlength) + diffs[pointer][1];
              text_insert = text_insert.substring(
                0,
                text_insert.length - commonlength
              );
              text_delete = text_delete.substring(
                0,
                text_delete.length - commonlength
              );
            }
          }
          pointer -= count_delete + count_insert;
          diffs.splice(pointer, count_delete + count_insert);
          if (text_delete.length) {
            diffs.splice(pointer, 0, new Diff(DIFF_DELETE, text_delete));
            pointer++;
          }
          if (text_insert.length) {
            diffs.splice(pointer, 0, new Diff(DIFF_INSERT, text_insert));
            pointer++;
          }
          pointer++;
        } else if (pointer !== 0 && diffs[pointer - 1][0] === DIFF_EQUAL) {
          diffs[pointer - 1][1] += diffs[pointer][1];
          diffs.splice(pointer, 1);
        } else {
          pointer++;
        }
        count_insert = 0;
        count_delete = 0;
        text_delete = "";
        text_insert = "";
        break;
    }
  }
  if (diffs[diffs.length - 1][1] === "") {
    diffs.pop();
  }
  let changes = false;
  pointer = 1;
  while (pointer < diffs.length - 1) {
    if (diffs[pointer - 1][0] === DIFF_EQUAL && diffs[pointer + 1][0] === DIFF_EQUAL) {
      if (diffs[pointer][1].substring(
        diffs[pointer][1].length - diffs[pointer - 1][1].length
      ) === diffs[pointer - 1][1]) {
        diffs[pointer][1] = diffs[pointer - 1][1] + diffs[pointer][1].substring(
          0,
          diffs[pointer][1].length - diffs[pointer - 1][1].length
        );
        diffs[pointer + 1][1] = diffs[pointer - 1][1] + diffs[pointer + 1][1];
        diffs.splice(pointer - 1, 1);
        changes = true;
      } else if (diffs[pointer][1].substring(0, diffs[pointer + 1][1].length) === diffs[pointer + 1][1]) {
        diffs[pointer - 1][1] += diffs[pointer + 1][1];
        diffs[pointer][1] = diffs[pointer][1].substring(diffs[pointer + 1][1].length) + diffs[pointer + 1][1];
        diffs.splice(pointer + 1, 1);
        changes = true;
      }
    }
    pointer++;
  }
  if (changes) {
    diff_cleanupMerge(diffs);
  }
}

const NO_DIFF_MESSAGE = "Compared values have no visual difference.";
const SIMILAR_MESSAGE = "Compared values serialize to the same structure.\nPrinting internal object structure without calling `toJSON` instead.";

var build = {};

Object.defineProperty(build, '__esModule', {
  value: true
});
var _default = build.default = diffSequence;
/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

// This diff-sequences package implements the linear space variation in
// An O(ND) Difference Algorithm and Its Variations by Eugene W. Myers

// Relationship in notation between Myers paper and this package:
// A is a
// N is aLength, aEnd - aStart, and so on
// x is aIndex, aFirst, aLast, and so on
// B is b
// M is bLength, bEnd - bStart, and so on
// y is bIndex, bFirst, bLast, and so on
// Δ = N - M is negative of baDeltaLength = bLength - aLength
// D is d
// k is kF
// k + Δ is kF = kR - baDeltaLength
// V is aIndexesF or aIndexesR (see comment below about Indexes type)
// index intervals [1, N] and [1, M] are [0, aLength) and [0, bLength)
// starting point in forward direction (0, 0) is (-1, -1)
// starting point in reverse direction (N + 1, M + 1) is (aLength, bLength)

// The “edit graph” for sequences a and b corresponds to items:
// in a on the horizontal axis
// in b on the vertical axis
//
// Given a-coordinate of a point in a diagonal, you can compute b-coordinate.
//
// Forward diagonals kF:
// zero diagonal intersects top left corner
// positive diagonals intersect top edge
// negative diagonals insersect left edge
//
// Reverse diagonals kR:
// zero diagonal intersects bottom right corner
// positive diagonals intersect right edge
// negative diagonals intersect bottom edge

// The graph contains a directed acyclic graph of edges:
// horizontal: delete an item from a
// vertical: insert an item from b
// diagonal: common item in a and b
//
// The algorithm solves dual problems in the graph analogy:
// Find longest common subsequence: path with maximum number of diagonal edges
// Find shortest edit script: path with minimum number of non-diagonal edges

// Input callback function compares items at indexes in the sequences.

// Output callback function receives the number of adjacent items
// and starting indexes of each common subsequence.
// Either original functions or wrapped to swap indexes if graph is transposed.
// Indexes in sequence a of last point of forward or reverse paths in graph.
// Myers algorithm indexes by diagonal k which for negative is bad deopt in V8.
// This package indexes by iF and iR which are greater than or equal to zero.
// and also updates the index arrays in place to cut memory in half.
// kF = 2 * iF - d
// kR = d - 2 * iR
// Division of index intervals in sequences a and b at the middle change.
// Invariant: intervals do not have common items at the start or end.
const pkg = 'diff-sequences'; // for error messages
const NOT_YET_SET = 0; // small int instead of undefined to avoid deopt in V8

// Return the number of common items that follow in forward direction.
// The length of what Myers paper calls a “snake” in a forward path.
const countCommonItemsF = (aIndex, aEnd, bIndex, bEnd, isCommon) => {
  let nCommon = 0;
  while (aIndex < aEnd && bIndex < bEnd && isCommon(aIndex, bIndex)) {
    aIndex += 1;
    bIndex += 1;
    nCommon += 1;
  }
  return nCommon;
};

// Return the number of common items that precede in reverse direction.
// The length of what Myers paper calls a “snake” in a reverse path.
const countCommonItemsR = (aStart, aIndex, bStart, bIndex, isCommon) => {
  let nCommon = 0;
  while (aStart <= aIndex && bStart <= bIndex && isCommon(aIndex, bIndex)) {
    aIndex -= 1;
    bIndex -= 1;
    nCommon += 1;
  }
  return nCommon;
};

// A simple function to extend forward paths from (d - 1) to d changes
// when forward and reverse paths cannot yet overlap.
const extendPathsF = (
  d,
  aEnd,
  bEnd,
  bF,
  isCommon,
  aIndexesF,
  iMaxF // return the value because optimization might decrease it
) => {
  // Unroll the first iteration.
  let iF = 0;
  let kF = -d; // kF = 2 * iF - d
  let aFirst = aIndexesF[iF]; // in first iteration always insert
  let aIndexPrev1 = aFirst; // prev value of [iF - 1] in next iteration
  aIndexesF[iF] += countCommonItemsF(
    aFirst + 1,
    aEnd,
    bF + aFirst - kF + 1,
    bEnd,
    isCommon
  );

  // Optimization: skip diagonals in which paths cannot ever overlap.
  const nF = d < iMaxF ? d : iMaxF;

  // The diagonals kF are odd when d is odd and even when d is even.
  for (iF += 1, kF += 2; iF <= nF; iF += 1, kF += 2) {
    // To get first point of path segment, move one change in forward direction
    // from last point of previous path segment in an adjacent diagonal.
    // In last possible iteration when iF === d and kF === d always delete.
    if (iF !== d && aIndexPrev1 < aIndexesF[iF]) {
      aFirst = aIndexesF[iF]; // vertical to insert from b
    } else {
      aFirst = aIndexPrev1 + 1; // horizontal to delete from a

      if (aEnd <= aFirst) {
        // Optimization: delete moved past right of graph.
        return iF - 1;
      }
    }

    // To get last point of path segment, move along diagonal of common items.
    aIndexPrev1 = aIndexesF[iF];
    aIndexesF[iF] =
      aFirst +
      countCommonItemsF(aFirst + 1, aEnd, bF + aFirst - kF + 1, bEnd, isCommon);
  }
  return iMaxF;
};

// A simple function to extend reverse paths from (d - 1) to d changes
// when reverse and forward paths cannot yet overlap.
const extendPathsR = (
  d,
  aStart,
  bStart,
  bR,
  isCommon,
  aIndexesR,
  iMaxR // return the value because optimization might decrease it
) => {
  // Unroll the first iteration.
  let iR = 0;
  let kR = d; // kR = d - 2 * iR
  let aFirst = aIndexesR[iR]; // in first iteration always insert
  let aIndexPrev1 = aFirst; // prev value of [iR - 1] in next iteration
  aIndexesR[iR] -= countCommonItemsR(
    aStart,
    aFirst - 1,
    bStart,
    bR + aFirst - kR - 1,
    isCommon
  );

  // Optimization: skip diagonals in which paths cannot ever overlap.
  const nR = d < iMaxR ? d : iMaxR;

  // The diagonals kR are odd when d is odd and even when d is even.
  for (iR += 1, kR -= 2; iR <= nR; iR += 1, kR -= 2) {
    // To get first point of path segment, move one change in reverse direction
    // from last point of previous path segment in an adjacent diagonal.
    // In last possible iteration when iR === d and kR === -d always delete.
    if (iR !== d && aIndexesR[iR] < aIndexPrev1) {
      aFirst = aIndexesR[iR]; // vertical to insert from b
    } else {
      aFirst = aIndexPrev1 - 1; // horizontal to delete from a

      if (aFirst < aStart) {
        // Optimization: delete moved past left of graph.
        return iR - 1;
      }
    }

    // To get last point of path segment, move along diagonal of common items.
    aIndexPrev1 = aIndexesR[iR];
    aIndexesR[iR] =
      aFirst -
      countCommonItemsR(
        aStart,
        aFirst - 1,
        bStart,
        bR + aFirst - kR - 1,
        isCommon
      );
  }
  return iMaxR;
};

// A complete function to extend forward paths from (d - 1) to d changes.
// Return true if a path overlaps reverse path of (d - 1) changes in its diagonal.
const extendOverlappablePathsF = (
  d,
  aStart,
  aEnd,
  bStart,
  bEnd,
  isCommon,
  aIndexesF,
  iMaxF,
  aIndexesR,
  iMaxR,
  division // update prop values if return true
) => {
  const bF = bStart - aStart; // bIndex = bF + aIndex - kF
  const aLength = aEnd - aStart;
  const bLength = bEnd - bStart;
  const baDeltaLength = bLength - aLength; // kF = kR - baDeltaLength

  // Range of diagonals in which forward and reverse paths might overlap.
  const kMinOverlapF = -baDeltaLength - (d - 1); // -(d - 1) <= kR
  const kMaxOverlapF = -baDeltaLength + (d - 1); // kR <= (d - 1)

  let aIndexPrev1 = NOT_YET_SET; // prev value of [iF - 1] in next iteration

  // Optimization: skip diagonals in which paths cannot ever overlap.
  const nF = d < iMaxF ? d : iMaxF;

  // The diagonals kF = 2 * iF - d are odd when d is odd and even when d is even.
  for (let iF = 0, kF = -d; iF <= nF; iF += 1, kF += 2) {
    // To get first point of path segment, move one change in forward direction
    // from last point of previous path segment in an adjacent diagonal.
    // In first iteration when iF === 0 and kF === -d always insert.
    // In last possible iteration when iF === d and kF === d always delete.
    const insert = iF === 0 || (iF !== d && aIndexPrev1 < aIndexesF[iF]);
    const aLastPrev = insert ? aIndexesF[iF] : aIndexPrev1;
    const aFirst = insert
      ? aLastPrev // vertical to insert from b
      : aLastPrev + 1; // horizontal to delete from a

    // To get last point of path segment, move along diagonal of common items.
    const bFirst = bF + aFirst - kF;
    const nCommonF = countCommonItemsF(
      aFirst + 1,
      aEnd,
      bFirst + 1,
      bEnd,
      isCommon
    );
    const aLast = aFirst + nCommonF;
    aIndexPrev1 = aIndexesF[iF];
    aIndexesF[iF] = aLast;
    if (kMinOverlapF <= kF && kF <= kMaxOverlapF) {
      // Solve for iR of reverse path with (d - 1) changes in diagonal kF:
      // kR = kF + baDeltaLength
      // kR = (d - 1) - 2 * iR
      const iR = (d - 1 - (kF + baDeltaLength)) / 2;

      // If this forward path overlaps the reverse path in this diagonal,
      // then this is the middle change of the index intervals.
      if (iR <= iMaxR && aIndexesR[iR] - 1 <= aLast) {
        // Unlike the Myers algorithm which finds only the middle “snake”
        // this package can find two common subsequences per division.
        // Last point of previous path segment is on an adjacent diagonal.
        const bLastPrev = bF + aLastPrev - (insert ? kF + 1 : kF - 1);

        // Because of invariant that intervals preceding the middle change
        // cannot have common items at the end,
        // move in reverse direction along a diagonal of common items.
        const nCommonR = countCommonItemsR(
          aStart,
          aLastPrev,
          bStart,
          bLastPrev,
          isCommon
        );
        const aIndexPrevFirst = aLastPrev - nCommonR;
        const bIndexPrevFirst = bLastPrev - nCommonR;
        const aEndPreceding = aIndexPrevFirst + 1;
        const bEndPreceding = bIndexPrevFirst + 1;
        division.nChangePreceding = d - 1;
        if (d - 1 === aEndPreceding + bEndPreceding - aStart - bStart) {
          // Optimization: number of preceding changes in forward direction
          // is equal to number of items in preceding interval,
          // therefore it cannot contain any common items.
          division.aEndPreceding = aStart;
          division.bEndPreceding = bStart;
        } else {
          division.aEndPreceding = aEndPreceding;
          division.bEndPreceding = bEndPreceding;
        }
        division.nCommonPreceding = nCommonR;
        if (nCommonR !== 0) {
          division.aCommonPreceding = aEndPreceding;
          division.bCommonPreceding = bEndPreceding;
        }
        division.nCommonFollowing = nCommonF;
        if (nCommonF !== 0) {
          division.aCommonFollowing = aFirst + 1;
          division.bCommonFollowing = bFirst + 1;
        }
        const aStartFollowing = aLast + 1;
        const bStartFollowing = bFirst + nCommonF + 1;
        division.nChangeFollowing = d - 1;
        if (d - 1 === aEnd + bEnd - aStartFollowing - bStartFollowing) {
          // Optimization: number of changes in reverse direction
          // is equal to number of items in following interval,
          // therefore it cannot contain any common items.
          division.aStartFollowing = aEnd;
          division.bStartFollowing = bEnd;
        } else {
          division.aStartFollowing = aStartFollowing;
          division.bStartFollowing = bStartFollowing;
        }
        return true;
      }
    }
  }
  return false;
};

// A complete function to extend reverse paths from (d - 1) to d changes.
// Return true if a path overlaps forward path of d changes in its diagonal.
const extendOverlappablePathsR = (
  d,
  aStart,
  aEnd,
  bStart,
  bEnd,
  isCommon,
  aIndexesF,
  iMaxF,
  aIndexesR,
  iMaxR,
  division // update prop values if return true
) => {
  const bR = bEnd - aEnd; // bIndex = bR + aIndex - kR
  const aLength = aEnd - aStart;
  const bLength = bEnd - bStart;
  const baDeltaLength = bLength - aLength; // kR = kF + baDeltaLength

  // Range of diagonals in which forward and reverse paths might overlap.
  const kMinOverlapR = baDeltaLength - d; // -d <= kF
  const kMaxOverlapR = baDeltaLength + d; // kF <= d

  let aIndexPrev1 = NOT_YET_SET; // prev value of [iR - 1] in next iteration

  // Optimization: skip diagonals in which paths cannot ever overlap.
  const nR = d < iMaxR ? d : iMaxR;

  // The diagonals kR = d - 2 * iR are odd when d is odd and even when d is even.
  for (let iR = 0, kR = d; iR <= nR; iR += 1, kR -= 2) {
    // To get first point of path segment, move one change in reverse direction
    // from last point of previous path segment in an adjacent diagonal.
    // In first iteration when iR === 0 and kR === d always insert.
    // In last possible iteration when iR === d and kR === -d always delete.
    const insert = iR === 0 || (iR !== d && aIndexesR[iR] < aIndexPrev1);
    const aLastPrev = insert ? aIndexesR[iR] : aIndexPrev1;
    const aFirst = insert
      ? aLastPrev // vertical to insert from b
      : aLastPrev - 1; // horizontal to delete from a

    // To get last point of path segment, move along diagonal of common items.
    const bFirst = bR + aFirst - kR;
    const nCommonR = countCommonItemsR(
      aStart,
      aFirst - 1,
      bStart,
      bFirst - 1,
      isCommon
    );
    const aLast = aFirst - nCommonR;
    aIndexPrev1 = aIndexesR[iR];
    aIndexesR[iR] = aLast;
    if (kMinOverlapR <= kR && kR <= kMaxOverlapR) {
      // Solve for iF of forward path with d changes in diagonal kR:
      // kF = kR - baDeltaLength
      // kF = 2 * iF - d
      const iF = (d + (kR - baDeltaLength)) / 2;

      // If this reverse path overlaps the forward path in this diagonal,
      // then this is a middle change of the index intervals.
      if (iF <= iMaxF && aLast - 1 <= aIndexesF[iF]) {
        const bLast = bFirst - nCommonR;
        division.nChangePreceding = d;
        if (d === aLast + bLast - aStart - bStart) {
          // Optimization: number of changes in reverse direction
          // is equal to number of items in preceding interval,
          // therefore it cannot contain any common items.
          division.aEndPreceding = aStart;
          division.bEndPreceding = bStart;
        } else {
          division.aEndPreceding = aLast;
          division.bEndPreceding = bLast;
        }
        division.nCommonPreceding = nCommonR;
        if (nCommonR !== 0) {
          // The last point of reverse path segment is start of common subsequence.
          division.aCommonPreceding = aLast;
          division.bCommonPreceding = bLast;
        }
        division.nChangeFollowing = d - 1;
        if (d === 1) {
          // There is no previous path segment.
          division.nCommonFollowing = 0;
          division.aStartFollowing = aEnd;
          division.bStartFollowing = bEnd;
        } else {
          // Unlike the Myers algorithm which finds only the middle “snake”
          // this package can find two common subsequences per division.
          // Last point of previous path segment is on an adjacent diagonal.
          const bLastPrev = bR + aLastPrev - (insert ? kR - 1 : kR + 1);

          // Because of invariant that intervals following the middle change
          // cannot have common items at the start,
          // move in forward direction along a diagonal of common items.
          const nCommonF = countCommonItemsF(
            aLastPrev,
            aEnd,
            bLastPrev,
            bEnd,
            isCommon
          );
          division.nCommonFollowing = nCommonF;
          if (nCommonF !== 0) {
            // The last point of reverse path segment is start of common subsequence.
            division.aCommonFollowing = aLastPrev;
            division.bCommonFollowing = bLastPrev;
          }
          const aStartFollowing = aLastPrev + nCommonF; // aFirstPrev
          const bStartFollowing = bLastPrev + nCommonF; // bFirstPrev

          if (d - 1 === aEnd + bEnd - aStartFollowing - bStartFollowing) {
            // Optimization: number of changes in forward direction
            // is equal to number of items in following interval,
            // therefore it cannot contain any common items.
            division.aStartFollowing = aEnd;
            division.bStartFollowing = bEnd;
          } else {
            division.aStartFollowing = aStartFollowing;
            division.bStartFollowing = bStartFollowing;
          }
        }
        return true;
      }
    }
  }
  return false;
};

// Given index intervals and input function to compare items at indexes,
// divide at the middle change.
//
// DO NOT CALL if start === end, because interval cannot contain common items
// and because this function will throw the “no overlap” error.
const divide = (
  nChange,
  aStart,
  aEnd,
  bStart,
  bEnd,
  isCommon,
  aIndexesF,
  aIndexesR,
  division // output
) => {
  const bF = bStart - aStart; // bIndex = bF + aIndex - kF
  const bR = bEnd - aEnd; // bIndex = bR + aIndex - kR
  const aLength = aEnd - aStart;
  const bLength = bEnd - bStart;

  // Because graph has square or portrait orientation,
  // length difference is minimum number of items to insert from b.
  // Corresponding forward and reverse diagonals in graph
  // depend on length difference of the sequences:
  // kF = kR - baDeltaLength
  // kR = kF + baDeltaLength
  const baDeltaLength = bLength - aLength;

  // Optimization: max diagonal in graph intersects corner of shorter side.
  let iMaxF = aLength;
  let iMaxR = aLength;

  // Initialize no changes yet in forward or reverse direction:
  aIndexesF[0] = aStart - 1; // at open start of interval, outside closed start
  aIndexesR[0] = aEnd; // at open end of interval

  if (baDeltaLength % 2 === 0) {
    // The number of changes in paths is 2 * d if length difference is even.
    const dMin = (nChange || baDeltaLength) / 2;
    const dMax = (aLength + bLength) / 2;
    for (let d = 1; d <= dMax; d += 1) {
      iMaxF = extendPathsF(d, aEnd, bEnd, bF, isCommon, aIndexesF, iMaxF);
      if (d < dMin) {
        iMaxR = extendPathsR(d, aStart, bStart, bR, isCommon, aIndexesR, iMaxR);
      } else if (
        // If a reverse path overlaps a forward path in the same diagonal,
        // return a division of the index intervals at the middle change.
        extendOverlappablePathsR(
          d,
          aStart,
          aEnd,
          bStart,
          bEnd,
          isCommon,
          aIndexesF,
          iMaxF,
          aIndexesR,
          iMaxR,
          division
        )
      ) {
        return;
      }
    }
  } else {
    // The number of changes in paths is 2 * d - 1 if length difference is odd.
    const dMin = ((nChange || baDeltaLength) + 1) / 2;
    const dMax = (aLength + bLength + 1) / 2;

    // Unroll first half iteration so loop extends the relevant pairs of paths.
    // Because of invariant that intervals have no common items at start or end,
    // and limitation not to call divide with empty intervals,
    // therefore it cannot be called if a forward path with one change
    // would overlap a reverse path with no changes, even if dMin === 1.
    let d = 1;
    iMaxF = extendPathsF(d, aEnd, bEnd, bF, isCommon, aIndexesF, iMaxF);
    for (d += 1; d <= dMax; d += 1) {
      iMaxR = extendPathsR(
        d - 1,
        aStart,
        bStart,
        bR,
        isCommon,
        aIndexesR,
        iMaxR
      );
      if (d < dMin) {
        iMaxF = extendPathsF(d, aEnd, bEnd, bF, isCommon, aIndexesF, iMaxF);
      } else if (
        // If a forward path overlaps a reverse path in the same diagonal,
        // return a division of the index intervals at the middle change.
        extendOverlappablePathsF(
          d,
          aStart,
          aEnd,
          bStart,
          bEnd,
          isCommon,
          aIndexesF,
          iMaxF,
          aIndexesR,
          iMaxR,
          division
        )
      ) {
        return;
      }
    }
  }

  /* istanbul ignore next */
  throw new Error(
    `${pkg}: no overlap aStart=${aStart} aEnd=${aEnd} bStart=${bStart} bEnd=${bEnd}`
  );
};

// Given index intervals and input function to compare items at indexes,
// return by output function the number of adjacent items and starting indexes
// of each common subsequence. Divide and conquer with only linear space.
//
// The index intervals are half open [start, end) like array slice method.
// DO NOT CALL if start === end, because interval cannot contain common items
// and because divide function will throw the “no overlap” error.
const findSubsequences = (
  nChange,
  aStart,
  aEnd,
  bStart,
  bEnd,
  transposed,
  callbacks,
  aIndexesF,
  aIndexesR,
  division // temporary memory, not input nor output
) => {
  if (bEnd - bStart < aEnd - aStart) {
    // Transpose graph so it has portrait instead of landscape orientation.
    // Always compare shorter to longer sequence for consistency and optimization.
    transposed = !transposed;
    if (transposed && callbacks.length === 1) {
      // Lazily wrap callback functions to swap args if graph is transposed.
      const {foundSubsequence, isCommon} = callbacks[0];
      callbacks[1] = {
        foundSubsequence: (nCommon, bCommon, aCommon) => {
          foundSubsequence(nCommon, aCommon, bCommon);
        },
        isCommon: (bIndex, aIndex) => isCommon(aIndex, bIndex)
      };
    }
    const tStart = aStart;
    const tEnd = aEnd;
    aStart = bStart;
    aEnd = bEnd;
    bStart = tStart;
    bEnd = tEnd;
  }
  const {foundSubsequence, isCommon} = callbacks[transposed ? 1 : 0];

  // Divide the index intervals at the middle change.
  divide(
    nChange,
    aStart,
    aEnd,
    bStart,
    bEnd,
    isCommon,
    aIndexesF,
    aIndexesR,
    division
  );
  const {
    nChangePreceding,
    aEndPreceding,
    bEndPreceding,
    nCommonPreceding,
    aCommonPreceding,
    bCommonPreceding,
    nCommonFollowing,
    aCommonFollowing,
    bCommonFollowing,
    nChangeFollowing,
    aStartFollowing,
    bStartFollowing
  } = division;

  // Unless either index interval is empty, they might contain common items.
  if (aStart < aEndPreceding && bStart < bEndPreceding) {
    // Recursely find and return common subsequences preceding the division.
    findSubsequences(
      nChangePreceding,
      aStart,
      aEndPreceding,
      bStart,
      bEndPreceding,
      transposed,
      callbacks,
      aIndexesF,
      aIndexesR,
      division
    );
  }

  // Return common subsequences that are adjacent to the middle change.
  if (nCommonPreceding !== 0) {
    foundSubsequence(nCommonPreceding, aCommonPreceding, bCommonPreceding);
  }
  if (nCommonFollowing !== 0) {
    foundSubsequence(nCommonFollowing, aCommonFollowing, bCommonFollowing);
  }

  // Unless either index interval is empty, they might contain common items.
  if (aStartFollowing < aEnd && bStartFollowing < bEnd) {
    // Recursely find and return common subsequences following the division.
    findSubsequences(
      nChangeFollowing,
      aStartFollowing,
      aEnd,
      bStartFollowing,
      bEnd,
      transposed,
      callbacks,
      aIndexesF,
      aIndexesR,
      division
    );
  }
};
const validateLength = (name, arg) => {
  if (typeof arg !== 'number') {
    throw new TypeError(`${pkg}: ${name} typeof ${typeof arg} is not a number`);
  }
  if (!Number.isSafeInteger(arg)) {
    throw new RangeError(`${pkg}: ${name} value ${arg} is not a safe integer`);
  }
  if (arg < 0) {
    throw new RangeError(`${pkg}: ${name} value ${arg} is a negative integer`);
  }
};
const validateCallback = (name, arg) => {
  const type = typeof arg;
  if (type !== 'function') {
    throw new TypeError(`${pkg}: ${name} typeof ${type} is not a function`);
  }
};

// Compare items in two sequences to find a longest common subsequence.
// Given lengths of sequences and input function to compare items at indexes,
// return by output function the number of adjacent items and starting indexes
// of each common subsequence.
function diffSequence(aLength, bLength, isCommon, foundSubsequence) {
  validateLength('aLength', aLength);
  validateLength('bLength', bLength);
  validateCallback('isCommon', isCommon);
  validateCallback('foundSubsequence', foundSubsequence);

  // Count common items from the start in the forward direction.
  const nCommonF = countCommonItemsF(0, aLength, 0, bLength, isCommon);
  if (nCommonF !== 0) {
    foundSubsequence(nCommonF, 0, 0);
  }

  // Unless both sequences consist of common items only,
  // find common items in the half-trimmed index intervals.
  if (aLength !== nCommonF || bLength !== nCommonF) {
    // Invariant: intervals do not have common items at the start.
    // The start of an index interval is closed like array slice method.
    const aStart = nCommonF;
    const bStart = nCommonF;

    // Count common items from the end in the reverse direction.
    const nCommonR = countCommonItemsR(
      aStart,
      aLength - 1,
      bStart,
      bLength - 1,
      isCommon
    );

    // Invariant: intervals do not have common items at the end.
    // The end of an index interval is open like array slice method.
    const aEnd = aLength - nCommonR;
    const bEnd = bLength - nCommonR;

    // Unless one sequence consists of common items only,
    // therefore the other trimmed index interval consists of changes only,
    // find common items in the trimmed index intervals.
    const nCommonFR = nCommonF + nCommonR;
    if (aLength !== nCommonFR && bLength !== nCommonFR) {
      const nChange = 0; // number of change items is not yet known
      const transposed = false; // call the original unwrapped functions
      const callbacks = [
        {
          foundSubsequence,
          isCommon
        }
      ];

      // Indexes in sequence a of last points in furthest reaching paths
      // from outside the start at top left in the forward direction:
      const aIndexesF = [NOT_YET_SET];
      // from the end at bottom right in the reverse direction:
      const aIndexesR = [NOT_YET_SET];

      // Initialize one object as output of all calls to divide function.
      const division = {
        aCommonFollowing: NOT_YET_SET,
        aCommonPreceding: NOT_YET_SET,
        aEndPreceding: NOT_YET_SET,
        aStartFollowing: NOT_YET_SET,
        bCommonFollowing: NOT_YET_SET,
        bCommonPreceding: NOT_YET_SET,
        bEndPreceding: NOT_YET_SET,
        bStartFollowing: NOT_YET_SET,
        nChangeFollowing: NOT_YET_SET,
        nChangePreceding: NOT_YET_SET,
        nCommonFollowing: NOT_YET_SET,
        nCommonPreceding: NOT_YET_SET
      };

      // Find and return common subsequences in the trimmed index intervals.
      findSubsequences(
        nChange,
        aStart,
        aEnd,
        bStart,
        bEnd,
        transposed,
        callbacks,
        aIndexesF,
        aIndexesR,
        division
      );
    }
    if (nCommonR !== 0) {
      foundSubsequence(nCommonR, aEnd, bEnd);
    }
  }
}

function formatTrailingSpaces(line, trailingSpaceFormatter) {
  return line.replace(/\s+$/, (match) => trailingSpaceFormatter(match));
}
function printDiffLine(line, isFirstOrLast, color, indicator, trailingSpaceFormatter, emptyFirstOrLastLinePlaceholder) {
  return line.length !== 0 ? color(
    `${indicator} ${formatTrailingSpaces(line, trailingSpaceFormatter)}`
  ) : indicator !== " " ? color(indicator) : isFirstOrLast && emptyFirstOrLastLinePlaceholder.length !== 0 ? color(`${indicator} ${emptyFirstOrLastLinePlaceholder}`) : "";
}
function printDeleteLine(line, isFirstOrLast, {
  aColor,
  aIndicator,
  changeLineTrailingSpaceColor,
  emptyFirstOrLastLinePlaceholder
}) {
  return printDiffLine(
    line,
    isFirstOrLast,
    aColor,
    aIndicator,
    changeLineTrailingSpaceColor,
    emptyFirstOrLastLinePlaceholder
  );
}
function printInsertLine(line, isFirstOrLast, {
  bColor,
  bIndicator,
  changeLineTrailingSpaceColor,
  emptyFirstOrLastLinePlaceholder
}) {
  return printDiffLine(
    line,
    isFirstOrLast,
    bColor,
    bIndicator,
    changeLineTrailingSpaceColor,
    emptyFirstOrLastLinePlaceholder
  );
}
function printCommonLine(line, isFirstOrLast, {
  commonColor,
  commonIndicator,
  commonLineTrailingSpaceColor,
  emptyFirstOrLastLinePlaceholder
}) {
  return printDiffLine(
    line,
    isFirstOrLast,
    commonColor,
    commonIndicator,
    commonLineTrailingSpaceColor,
    emptyFirstOrLastLinePlaceholder
  );
}
function createPatchMark(aStart, aEnd, bStart, bEnd, { patchColor }) {
  return patchColor(
    `@@ -${aStart + 1},${aEnd - aStart} +${bStart + 1},${bEnd - bStart} @@`
  );
}
function joinAlignedDiffsNoExpand(diffs, options) {
  const iLength = diffs.length;
  const nContextLines = options.contextLines;
  const nContextLines2 = nContextLines + nContextLines;
  let jLength = iLength;
  let hasExcessAtStartOrEnd = false;
  let nExcessesBetweenChanges = 0;
  let i = 0;
  while (i !== iLength) {
    const iStart = i;
    while (i !== iLength && diffs[i][0] === DIFF_EQUAL) {
      i += 1;
    }
    if (iStart !== i) {
      if (iStart === 0) {
        if (i > nContextLines) {
          jLength -= i - nContextLines;
          hasExcessAtStartOrEnd = true;
        }
      } else if (i === iLength) {
        const n = i - iStart;
        if (n > nContextLines) {
          jLength -= n - nContextLines;
          hasExcessAtStartOrEnd = true;
        }
      } else {
        const n = i - iStart;
        if (n > nContextLines2) {
          jLength -= n - nContextLines2;
          nExcessesBetweenChanges += 1;
        }
      }
    }
    while (i !== iLength && diffs[i][0] !== DIFF_EQUAL) {
      i += 1;
    }
  }
  const hasPatch = nExcessesBetweenChanges !== 0 || hasExcessAtStartOrEnd;
  if (nExcessesBetweenChanges !== 0) {
    jLength += nExcessesBetweenChanges + 1;
  } else if (hasExcessAtStartOrEnd) {
    jLength += 1;
  }
  const jLast = jLength - 1;
  const lines = [];
  let jPatchMark = 0;
  if (hasPatch) {
    lines.push("");
  }
  let aStart = 0;
  let bStart = 0;
  let aEnd = 0;
  let bEnd = 0;
  const pushCommonLine = (line) => {
    const j = lines.length;
    lines.push(printCommonLine(line, j === 0 || j === jLast, options));
    aEnd += 1;
    bEnd += 1;
  };
  const pushDeleteLine = (line) => {
    const j = lines.length;
    lines.push(printDeleteLine(line, j === 0 || j === jLast, options));
    aEnd += 1;
  };
  const pushInsertLine = (line) => {
    const j = lines.length;
    lines.push(printInsertLine(line, j === 0 || j === jLast, options));
    bEnd += 1;
  };
  i = 0;
  while (i !== iLength) {
    let iStart = i;
    while (i !== iLength && diffs[i][0] === DIFF_EQUAL) {
      i += 1;
    }
    if (iStart !== i) {
      if (iStart === 0) {
        if (i > nContextLines) {
          iStart = i - nContextLines;
          aStart = iStart;
          bStart = iStart;
          aEnd = aStart;
          bEnd = bStart;
        }
        for (let iCommon = iStart; iCommon !== i; iCommon += 1) {
          pushCommonLine(diffs[iCommon][1]);
        }
      } else if (i === iLength) {
        const iEnd = i - iStart > nContextLines ? iStart + nContextLines : i;
        for (let iCommon = iStart; iCommon !== iEnd; iCommon += 1) {
          pushCommonLine(diffs[iCommon][1]);
        }
      } else {
        const nCommon = i - iStart;
        if (nCommon > nContextLines2) {
          const iEnd = iStart + nContextLines;
          for (let iCommon = iStart; iCommon !== iEnd; iCommon += 1) {
            pushCommonLine(diffs[iCommon][1]);
          }
          lines[jPatchMark] = createPatchMark(
            aStart,
            aEnd,
            bStart,
            bEnd,
            options
          );
          jPatchMark = lines.length;
          lines.push("");
          const nOmit = nCommon - nContextLines2;
          aStart = aEnd + nOmit;
          bStart = bEnd + nOmit;
          aEnd = aStart;
          bEnd = bStart;
          for (let iCommon = i - nContextLines; iCommon !== i; iCommon += 1) {
            pushCommonLine(diffs[iCommon][1]);
          }
        } else {
          for (let iCommon = iStart; iCommon !== i; iCommon += 1) {
            pushCommonLine(diffs[iCommon][1]);
          }
        }
      }
    }
    while (i !== iLength && diffs[i][0] === DIFF_DELETE) {
      pushDeleteLine(diffs[i][1]);
      i += 1;
    }
    while (i !== iLength && diffs[i][0] === DIFF_INSERT) {
      pushInsertLine(diffs[i][1]);
      i += 1;
    }
  }
  if (hasPatch) {
    lines[jPatchMark] = createPatchMark(aStart, aEnd, bStart, bEnd, options);
  }
  return lines.join("\n");
}
function joinAlignedDiffsExpand(diffs, options) {
  return diffs.map((diff, i, diffs2) => {
    const line = diff[1];
    const isFirstOrLast = i === 0 || i === diffs2.length - 1;
    switch (diff[0]) {
      case DIFF_DELETE:
        return printDeleteLine(line, isFirstOrLast, options);
      case DIFF_INSERT:
        return printInsertLine(line, isFirstOrLast, options);
      default:
        return printCommonLine(line, isFirstOrLast, options);
    }
  }).join("\n");
}

const noColor = (string) => string;
const DIFF_CONTEXT_DEFAULT = 5;
const DIFF_TRUNCATE_THRESHOLD_DEFAULT = 0;
function getDefaultOptions() {
  return {
    aAnnotation: "Expected",
    aColor: c.green,
    aIndicator: "-",
    bAnnotation: "Received",
    bColor: c.red,
    bIndicator: "+",
    changeColor: c.inverse,
    changeLineTrailingSpaceColor: noColor,
    commonColor: c.dim,
    commonIndicator: " ",
    commonLineTrailingSpaceColor: noColor,
    compareKeys: void 0,
    contextLines: DIFF_CONTEXT_DEFAULT,
    emptyFirstOrLastLinePlaceholder: "",
    expand: true,
    includeChangeCounts: false,
    omitAnnotationLines: false,
    patchColor: c.yellow,
    truncateThreshold: DIFF_TRUNCATE_THRESHOLD_DEFAULT,
    truncateAnnotation: "... Diff result is truncated",
    truncateAnnotationColor: noColor
  };
}
function getCompareKeys(compareKeys) {
  return compareKeys && typeof compareKeys === "function" ? compareKeys : void 0;
}
function getContextLines(contextLines) {
  return typeof contextLines === "number" && Number.isSafeInteger(contextLines) && contextLines >= 0 ? contextLines : DIFF_CONTEXT_DEFAULT;
}
function normalizeDiffOptions(options = {}) {
  return {
    ...getDefaultOptions(),
    ...options,
    compareKeys: getCompareKeys(options.compareKeys),
    contextLines: getContextLines(options.contextLines)
  };
}

function isEmptyString(lines) {
  return lines.length === 1 && lines[0].length === 0;
}
function countChanges(diffs) {
  let a = 0;
  let b = 0;
  diffs.forEach((diff) => {
    switch (diff[0]) {
      case DIFF_DELETE:
        a += 1;
        break;
      case DIFF_INSERT:
        b += 1;
        break;
    }
  });
  return { a, b };
}
function printAnnotation({
  aAnnotation,
  aColor,
  aIndicator,
  bAnnotation,
  bColor,
  bIndicator,
  includeChangeCounts,
  omitAnnotationLines
}, changeCounts) {
  if (omitAnnotationLines) {
    return "";
  }
  let aRest = "";
  let bRest = "";
  if (includeChangeCounts) {
    const aCount = String(changeCounts.a);
    const bCount = String(changeCounts.b);
    const baAnnotationLengthDiff = bAnnotation.length - aAnnotation.length;
    const aAnnotationPadding = " ".repeat(Math.max(0, baAnnotationLengthDiff));
    const bAnnotationPadding = " ".repeat(Math.max(0, -baAnnotationLengthDiff));
    const baCountLengthDiff = bCount.length - aCount.length;
    const aCountPadding = " ".repeat(Math.max(0, baCountLengthDiff));
    const bCountPadding = " ".repeat(Math.max(0, -baCountLengthDiff));
    aRest = `${aAnnotationPadding}  ${aIndicator} ${aCountPadding}${aCount}`;
    bRest = `${bAnnotationPadding}  ${bIndicator} ${bCountPadding}${bCount}`;
  }
  const a = `${aIndicator} ${aAnnotation}${aRest}`;
  const b = `${bIndicator} ${bAnnotation}${bRest}`;
  return `${aColor(a)}
${bColor(b)}

`;
}
function printDiffLines(diffs, truncated, options) {
  return printAnnotation(options, countChanges(diffs)) + (options.expand ? joinAlignedDiffsExpand(diffs, options) : joinAlignedDiffsNoExpand(diffs, options)) + (truncated ? options.truncateAnnotationColor(`
${options.truncateAnnotation}`) : "");
}
function diffLinesUnified(aLines, bLines, options) {
  const normalizedOptions = normalizeDiffOptions(options);
  const [diffs, truncated] = diffLinesRaw(
    isEmptyString(aLines) ? [] : aLines,
    isEmptyString(bLines) ? [] : bLines,
    normalizedOptions
  );
  return printDiffLines(diffs, truncated, normalizedOptions);
}
function diffLinesUnified2(aLinesDisplay, bLinesDisplay, aLinesCompare, bLinesCompare, options) {
  if (isEmptyString(aLinesDisplay) && isEmptyString(aLinesCompare)) {
    aLinesDisplay = [];
    aLinesCompare = [];
  }
  if (isEmptyString(bLinesDisplay) && isEmptyString(bLinesCompare)) {
    bLinesDisplay = [];
    bLinesCompare = [];
  }
  if (aLinesDisplay.length !== aLinesCompare.length || bLinesDisplay.length !== bLinesCompare.length) {
    return diffLinesUnified(aLinesDisplay, bLinesDisplay, options);
  }
  const [diffs, truncated] = diffLinesRaw(
    aLinesCompare,
    bLinesCompare,
    options
  );
  let aIndex = 0;
  let bIndex = 0;
  diffs.forEach((diff) => {
    switch (diff[0]) {
      case DIFF_DELETE:
        diff[1] = aLinesDisplay[aIndex];
        aIndex += 1;
        break;
      case DIFF_INSERT:
        diff[1] = bLinesDisplay[bIndex];
        bIndex += 1;
        break;
      default:
        diff[1] = bLinesDisplay[bIndex];
        aIndex += 1;
        bIndex += 1;
    }
  });
  return printDiffLines(diffs, truncated, normalizeDiffOptions(options));
}
function diffLinesRaw(aLines, bLines, options) {
  const truncate = (options == null ? void 0 : options.truncateThreshold) ?? false;
  const truncateThreshold = Math.max(
    Math.floor((options == null ? void 0 : options.truncateThreshold) ?? 0),
    0
  );
  const aLength = truncate ? Math.min(aLines.length, truncateThreshold) : aLines.length;
  const bLength = truncate ? Math.min(bLines.length, truncateThreshold) : bLines.length;
  const truncated = aLength !== aLines.length || bLength !== bLines.length;
  const isCommon = (aIndex2, bIndex2) => aLines[aIndex2] === bLines[bIndex2];
  const diffs = [];
  let aIndex = 0;
  let bIndex = 0;
  const foundSubsequence = (nCommon, aCommon, bCommon) => {
    for (; aIndex !== aCommon; aIndex += 1) {
      diffs.push(new Diff(DIFF_DELETE, aLines[aIndex]));
    }
    for (; bIndex !== bCommon; bIndex += 1) {
      diffs.push(new Diff(DIFF_INSERT, bLines[bIndex]));
    }
    for (; nCommon !== 0; nCommon -= 1, aIndex += 1, bIndex += 1) {
      diffs.push(new Diff(DIFF_EQUAL, bLines[bIndex]));
    }
  };
  _default(aLength, bLength, isCommon, foundSubsequence);
  for (; aIndex !== aLength; aIndex += 1) {
    diffs.push(new Diff(DIFF_DELETE, aLines[aIndex]));
  }
  for (; bIndex !== bLength; bIndex += 1) {
    diffs.push(new Diff(DIFF_INSERT, bLines[bIndex]));
  }
  return [diffs, truncated];
}

function getNewLineSymbol(string) {
  return string.includes("\r\n") ? "\r\n" : "\n";
}
function diffStrings(a, b, options) {
  const truncate = (options == null ? void 0 : options.truncateThreshold) ?? false;
  const truncateThreshold = Math.max(
    Math.floor((options == null ? void 0 : options.truncateThreshold) ?? 0),
    0
  );
  let aLength = a.length;
  let bLength = b.length;
  if (truncate) {
    const aMultipleLines = a.includes("\n");
    const bMultipleLines = b.includes("\n");
    const aNewLineSymbol = getNewLineSymbol(a);
    const bNewLineSymbol = getNewLineSymbol(b);
    const _a = aMultipleLines ? `${a.split(aNewLineSymbol, truncateThreshold).join(aNewLineSymbol)}
` : a;
    const _b = bMultipleLines ? `${b.split(bNewLineSymbol, truncateThreshold).join(bNewLineSymbol)}
` : b;
    aLength = _a.length;
    bLength = _b.length;
  }
  const truncated = aLength !== a.length || bLength !== b.length;
  const isCommon = (aIndex2, bIndex2) => a[aIndex2] === b[bIndex2];
  let aIndex = 0;
  let bIndex = 0;
  const diffs = [];
  const foundSubsequence = (nCommon, aCommon, bCommon) => {
    if (aIndex !== aCommon) {
      diffs.push(new Diff(DIFF_DELETE, a.slice(aIndex, aCommon)));
    }
    if (bIndex !== bCommon) {
      diffs.push(new Diff(DIFF_INSERT, b.slice(bIndex, bCommon)));
    }
    aIndex = aCommon + nCommon;
    bIndex = bCommon + nCommon;
    diffs.push(new Diff(DIFF_EQUAL, b.slice(bCommon, bIndex)));
  };
  _default(aLength, bLength, isCommon, foundSubsequence);
  if (aIndex !== aLength) {
    diffs.push(new Diff(DIFF_DELETE, a.slice(aIndex)));
  }
  if (bIndex !== bLength) {
    diffs.push(new Diff(DIFF_INSERT, b.slice(bIndex)));
  }
  return [diffs, truncated];
}

function concatenateRelevantDiffs(op, diffs, changeColor) {
  return diffs.reduce(
    (reduced, diff) => reduced + (diff[0] === DIFF_EQUAL ? diff[1] : diff[0] === op && diff[1].length !== 0 ? changeColor(diff[1]) : ""),
    ""
  );
}
class ChangeBuffer {
  op;
  line;
  // incomplete line
  lines;
  // complete lines
  changeColor;
  constructor(op, changeColor) {
    this.op = op;
    this.line = [];
    this.lines = [];
    this.changeColor = changeColor;
  }
  pushSubstring(substring) {
    this.pushDiff(new Diff(this.op, substring));
  }
  pushLine() {
    this.lines.push(
      this.line.length !== 1 ? new Diff(
        this.op,
        concatenateRelevantDiffs(this.op, this.line, this.changeColor)
      ) : this.line[0][0] === this.op ? this.line[0] : new Diff(this.op, this.line[0][1])
      // was common diff
    );
    this.line.length = 0;
  }
  isLineEmpty() {
    return this.line.length === 0;
  }
  // Minor input to buffer.
  pushDiff(diff) {
    this.line.push(diff);
  }
  // Main input to buffer.
  align(diff) {
    const string = diff[1];
    if (string.includes("\n")) {
      const substrings = string.split("\n");
      const iLast = substrings.length - 1;
      substrings.forEach((substring, i) => {
        if (i < iLast) {
          this.pushSubstring(substring);
          this.pushLine();
        } else if (substring.length !== 0) {
          this.pushSubstring(substring);
        }
      });
    } else {
      this.pushDiff(diff);
    }
  }
  // Output from buffer.
  moveLinesTo(lines) {
    if (!this.isLineEmpty()) {
      this.pushLine();
    }
    lines.push(...this.lines);
    this.lines.length = 0;
  }
}
class CommonBuffer {
  deleteBuffer;
  insertBuffer;
  lines;
  constructor(deleteBuffer, insertBuffer) {
    this.deleteBuffer = deleteBuffer;
    this.insertBuffer = insertBuffer;
    this.lines = [];
  }
  pushDiffCommonLine(diff) {
    this.lines.push(diff);
  }
  pushDiffChangeLines(diff) {
    const isDiffEmpty = diff[1].length === 0;
    if (!isDiffEmpty || this.deleteBuffer.isLineEmpty()) {
      this.deleteBuffer.pushDiff(diff);
    }
    if (!isDiffEmpty || this.insertBuffer.isLineEmpty()) {
      this.insertBuffer.pushDiff(diff);
    }
  }
  flushChangeLines() {
    this.deleteBuffer.moveLinesTo(this.lines);
    this.insertBuffer.moveLinesTo(this.lines);
  }
  // Input to buffer.
  align(diff) {
    const op = diff[0];
    const string = diff[1];
    if (string.includes("\n")) {
      const substrings = string.split("\n");
      const iLast = substrings.length - 1;
      substrings.forEach((substring, i) => {
        if (i === 0) {
          const subdiff = new Diff(op, substring);
          if (this.deleteBuffer.isLineEmpty() && this.insertBuffer.isLineEmpty()) {
            this.flushChangeLines();
            this.pushDiffCommonLine(subdiff);
          } else {
            this.pushDiffChangeLines(subdiff);
            this.flushChangeLines();
          }
        } else if (i < iLast) {
          this.pushDiffCommonLine(new Diff(op, substring));
        } else if (substring.length !== 0) {
          this.pushDiffChangeLines(new Diff(op, substring));
        }
      });
    } else {
      this.pushDiffChangeLines(diff);
    }
  }
  // Output from buffer.
  getLines() {
    this.flushChangeLines();
    return this.lines;
  }
}
function getAlignedDiffs(diffs, changeColor) {
  const deleteBuffer = new ChangeBuffer(DIFF_DELETE, changeColor);
  const insertBuffer = new ChangeBuffer(DIFF_INSERT, changeColor);
  const commonBuffer = new CommonBuffer(deleteBuffer, insertBuffer);
  diffs.forEach((diff) => {
    switch (diff[0]) {
      case DIFF_DELETE:
        deleteBuffer.align(diff);
        break;
      case DIFF_INSERT:
        insertBuffer.align(diff);
        break;
      default:
        commonBuffer.align(diff);
    }
  });
  return commonBuffer.getLines();
}

function hasCommonDiff(diffs, isMultiline) {
  if (isMultiline) {
    const iLast = diffs.length - 1;
    return diffs.some(
      (diff, i) => diff[0] === DIFF_EQUAL && (i !== iLast || diff[1] !== "\n")
    );
  }
  return diffs.some((diff) => diff[0] === DIFF_EQUAL);
}
function diffStringsUnified(a, b, options) {
  if (a !== b && a.length !== 0 && b.length !== 0) {
    const isMultiline = a.includes("\n") || b.includes("\n");
    const [diffs, truncated] = diffStringsRaw(
      isMultiline ? `${a}
` : a,
      isMultiline ? `${b}
` : b,
      true,
      // cleanupSemantic
      options
    );
    if (hasCommonDiff(diffs, isMultiline)) {
      const optionsNormalized = normalizeDiffOptions(options);
      const lines = getAlignedDiffs(diffs, optionsNormalized.changeColor);
      return printDiffLines(lines, truncated, optionsNormalized);
    }
  }
  return diffLinesUnified(a.split("\n"), b.split("\n"), options);
}
function diffStringsRaw(a, b, cleanup, options) {
  const [diffs, truncated] = diffStrings(a, b, options);
  if (cleanup) {
    diff_cleanupSemantic(diffs);
  }
  return [diffs, truncated];
}

function getCommonMessage(message, options) {
  const { commonColor } = normalizeDiffOptions(options);
  return commonColor(message);
}
const {
  AsymmetricMatcher,
  DOMCollection,
  DOMElement,
  Immutable,
  ReactElement,
  ReactTestComponent
} = plugins;
const PLUGINS = [
  ReactTestComponent,
  ReactElement,
  DOMElement,
  DOMCollection,
  Immutable,
  AsymmetricMatcher
];
const FORMAT_OPTIONS = {
  plugins: PLUGINS
};
const FALLBACK_FORMAT_OPTIONS = {
  callToJSON: false,
  maxDepth: 10,
  plugins: PLUGINS
};
function diff(a, b, options) {
  if (Object.is(a, b)) {
    return "";
  }
  const aType = getType(a);
  let expectedType = aType;
  let omitDifference = false;
  if (aType === "object" && typeof a.asymmetricMatch === "function") {
    if (a.$$typeof !== Symbol.for("jest.asymmetricMatcher")) {
      return void 0;
    }
    if (typeof a.getExpectedType !== "function") {
      return void 0;
    }
    expectedType = a.getExpectedType();
    omitDifference = expectedType === "string";
  }
  if (expectedType !== getType(b)) {
    const { aAnnotation, aColor, aIndicator, bAnnotation, bColor, bIndicator } = normalizeDiffOptions(options);
    const formatOptions = getFormatOptions(FALLBACK_FORMAT_OPTIONS, options);
    const aDisplay = format(a, formatOptions);
    const bDisplay = format(b, formatOptions);
    const aDiff = `${aColor(`${aIndicator} ${aAnnotation}:`)} 
${aDisplay}`;
    const bDiff = `${bColor(`${bIndicator} ${bAnnotation}:`)} 
${bDisplay}`;
    return `${aDiff}

${bDiff}`;
  }
  if (omitDifference) {
    return void 0;
  }
  switch (aType) {
    case "string":
      return diffLinesUnified(a.split("\n"), b.split("\n"), options);
    case "boolean":
    case "number":
      return comparePrimitive(a, b, options);
    case "map":
      return compareObjects(sortMap(a), sortMap(b), options);
    case "set":
      return compareObjects(sortSet(a), sortSet(b), options);
    default:
      return compareObjects(a, b, options);
  }
}
function comparePrimitive(a, b, options) {
  const aFormat = format(a, FORMAT_OPTIONS);
  const bFormat = format(b, FORMAT_OPTIONS);
  return aFormat === bFormat ? "" : diffLinesUnified(aFormat.split("\n"), bFormat.split("\n"), options);
}
function sortMap(map) {
  return new Map(Array.from(map.entries()).sort());
}
function sortSet(set) {
  return new Set(Array.from(set.values()).sort());
}
function compareObjects(a, b, options) {
  let difference;
  let hasThrown = false;
  try {
    const formatOptions = getFormatOptions(FORMAT_OPTIONS, options);
    difference = getObjectsDifference(a, b, formatOptions, options);
  } catch {
    hasThrown = true;
  }
  const noDiffMessage = getCommonMessage(NO_DIFF_MESSAGE, options);
  if (difference === void 0 || difference === noDiffMessage) {
    const formatOptions = getFormatOptions(FALLBACK_FORMAT_OPTIONS, options);
    difference = getObjectsDifference(a, b, formatOptions, options);
    if (difference !== noDiffMessage && !hasThrown) {
      difference = `${getCommonMessage(
        SIMILAR_MESSAGE,
        options
      )}

${difference}`;
    }
  }
  return difference;
}
function getFormatOptions(formatOptions, options) {
  const { compareKeys } = normalizeDiffOptions(options);
  return {
    ...formatOptions,
    compareKeys
  };
}
function getObjectsDifference(a, b, formatOptions, options) {
  const formatOptionsZeroIndent = { ...formatOptions, indent: 0 };
  const aCompare = format(a, formatOptionsZeroIndent);
  const bCompare = format(b, formatOptionsZeroIndent);
  if (aCompare === bCompare) {
    return getCommonMessage(NO_DIFF_MESSAGE, options);
  } else {
    const aDisplay = format(a, formatOptions);
    const bDisplay = format(b, formatOptions);
    return diffLinesUnified2(
      aDisplay.split("\n"),
      bDisplay.split("\n"),
      aCompare.split("\n"),
      bCompare.split("\n"),
      options
    );
  }
}
const MAX_DIFF_STRING_LENGTH = 2e4;
function isAsymmetricMatcher(data) {
  const type = getType$1(data);
  return type === "Object" && typeof data.asymmetricMatch === "function";
}
function isReplaceable(obj1, obj2) {
  const obj1Type = getType$1(obj1);
  const obj2Type = getType$1(obj2);
  return obj1Type === obj2Type && (obj1Type === "Object" || obj1Type === "Array");
}
function printDiffOrStringify(expected, received, options) {
  const { aAnnotation, bAnnotation } = normalizeDiffOptions(options);
  if (typeof expected === "string" && typeof received === "string" && expected.length > 0 && received.length > 0 && expected.length <= MAX_DIFF_STRING_LENGTH && received.length <= MAX_DIFF_STRING_LENGTH && expected !== received) {
    if (expected.includes("\n") || received.includes("\n")) {
      return diffStringsUnified(received, expected, options);
    }
    const [diffs] = diffStringsRaw(received, expected, true);
    const hasCommonDiff = diffs.some((diff2) => diff2[0] === DIFF_EQUAL);
    const printLabel = getLabelPrinter(aAnnotation, bAnnotation);
    const expectedLine = printLabel(aAnnotation) + printExpected(
      getCommonAndChangedSubstrings(diffs, DIFF_DELETE, hasCommonDiff)
    );
    const receivedLine = printLabel(bAnnotation) + printReceived(
      getCommonAndChangedSubstrings(diffs, DIFF_INSERT, hasCommonDiff)
    );
    return `${expectedLine}
${receivedLine}`;
  }
  const clonedExpected = deepClone(expected, { forceWritable: true });
  const clonedReceived = deepClone(received, { forceWritable: true });
  const { replacedExpected, replacedActual } = replaceAsymmetricMatcher(clonedExpected, clonedReceived);
  const difference = diff(replacedExpected, replacedActual, options);
  return difference;
}
function replaceAsymmetricMatcher(actual, expected, actualReplaced = /* @__PURE__ */ new WeakSet(), expectedReplaced = /* @__PURE__ */ new WeakSet()) {
  if (!isReplaceable(actual, expected)) {
    return { replacedActual: actual, replacedExpected: expected };
  }
  if (actualReplaced.has(actual) || expectedReplaced.has(expected)) {
    return { replacedActual: actual, replacedExpected: expected };
  }
  actualReplaced.add(actual);
  expectedReplaced.add(expected);
  getOwnProperties(expected).forEach((key) => {
    const expectedValue = expected[key];
    const actualValue = actual[key];
    if (isAsymmetricMatcher(expectedValue)) {
      if (expectedValue.asymmetricMatch(actualValue)) {
        actual[key] = expectedValue;
      }
    } else if (isAsymmetricMatcher(actualValue)) {
      if (actualValue.asymmetricMatch(expectedValue)) {
        expected[key] = actualValue;
      }
    } else if (isReplaceable(actualValue, expectedValue)) {
      const replaced = replaceAsymmetricMatcher(
        actualValue,
        expectedValue,
        actualReplaced,
        expectedReplaced
      );
      actual[key] = replaced.replacedActual;
      expected[key] = replaced.replacedExpected;
    }
  });
  return {
    replacedActual: actual,
    replacedExpected: expected
  };
}
function getLabelPrinter(...strings) {
  const maxLength = strings.reduce(
    (max, string) => string.length > max ? string.length : max,
    0
  );
  return (string) => `${string}: ${" ".repeat(maxLength - string.length)}`;
}
const SPACE_SYMBOL = "\xB7";
function replaceTrailingSpaces(text) {
  return text.replace(/\s+$/gm, (spaces) => SPACE_SYMBOL.repeat(spaces.length));
}
function printReceived(object) {
  return c.red(replaceTrailingSpaces(stringify(object)));
}
function printExpected(value) {
  return c.green(replaceTrailingSpaces(stringify(value)));
}
function getCommonAndChangedSubstrings(diffs, op, hasCommonDiff) {
  return diffs.reduce(
    (reduced, diff2) => reduced + (diff2[0] === DIFF_EQUAL ? diff2[1] : diff2[0] === op ? hasCommonDiff ? c.inverse(diff2[1]) : diff2[1] : ""),
    ""
  );
}

export { DIFF_DELETE, DIFF_EQUAL, DIFF_INSERT, Diff, diff, diffLinesRaw, diffLinesUnified, diffLinesUnified2, diffStringsRaw, diffStringsUnified, getLabelPrinter, printDiffOrStringify, replaceAsymmetricMatcher };
