/** Used to map aliases to their real names. */
exports.aliasToReal = {

  // Lodash aliases.
  'each': 'forEach',
  'eachRight': 'forEachRight',
  'entries': 'toPairs',
  'entriesIn': 'toPairsIn',
  'extend': 'assignIn',
  'extendAll': 'assignInAll',
  'extendAllWith': 'assignInAllWith',
  'extendWith': 'assignInWith',
  'first': 'head',

  // Methods that are curried variants of others.
  'conforms': 'conformsTo',
  'matches': 'isMatch',
  'property': 'get',

  // Ramda aliases.
  '__': 'placeholder',
  'F': 'stubFalse',
  'T': 'stubTrue',
  'all': 'every',
  'allPass': 'overEvery',
  'always': 'constant',
  'any': 'some',
  'anyPass': 'overSome',
  'apply': 'spread',
  'assoc': 'set',
  'assocPath': 'set',
  'complement': 'negate',
  'compose': 'flowRight',
  'contains': 'includes',
  'dissoc': 'unset',
  'dissocPath': 'unset',
  'dropLast': 'dropRight',
  'dropLastWhile': 'dropRightWhile',
  'equals': 'isEqual',
  'identical': 'eq',
  'indexBy': 'keyBy',
  'init': 'initial',
  'invertObj': 'invert',
  'juxt': 'over',
  'omitAll': 'omit',
  'nAry': 'ary',
  'path': 'get',
  'pathEq': 'matchesProperty',
  'pathOr': 'getOr',
  'paths': 'at',
  'pickAll': 'pick',
  'pipe': 'flow',
  'pluck': 'map',
  'prop': 'get',
  'propEq': 'matchesProperty',
  'propOr': 'getOr',
  'props': 'at',
  'symmetricDifference': 'xor',
  'symmetricDifferenceBy': 'xorBy',
  'symmetricDifferenceWith': 'xorWith',
  'takeLast': 'takeRight',
  'takeLastWhile': 'takeRightWhile',
  'unapply': 'rest',
  'unnest': 'flatten',
  'useWith': 'overArgs',
  'where': 'conformsTo',
  'whereEq': 'isMatch',
  'zipObj': 'zipObject'
};

/** Used to map ary to method names. */
exports.aryMethod = {
  '1': [
    'assignAll', 'assignInAll', 'attempt', 'castArray', 'ceil', 'create',
    'curry', 'curryRight', 'defaultsAll', 'defaultsDeepAll', 'floor', 'flow',
    'flowRight', 'fromPairs', 'invert', 'iteratee', 'memoize', 'method', 'mergeAll',
    'methodOf', 'mixin', 'nthArg', 'over', 'overEvery', 'overSome','rest', 'reverse',
    'round', 'runInContext', 'spread', 'template', 'trim', 'trimEnd', 'trimStart',
    'uniqueId', 'words', 'zipAll'
  ],
  '2': [
    'add', 'after', 'ary', 'assign', 'assignAllWith', 'assignIn', 'assignInAllWith',
    'at', 'before', 'bind', 'bindAll', 'bindKey', 'chunk', 'cloneDeepWith',
    'cloneWith', 'concat', 'conformsTo', 'countBy', 'curryN', 'curryRightN',
    'debounce', 'defaults', 'defaultsDeep', 'defaultTo', 'delay', 'difference',
    'divide', 'drop', 'dropRight', 'dropRightWhile', 'dropWhile', 'endsWith', 'eq',
    'every', 'filter', 'find', 'findIndex', 'findKey', 'findLast', 'findLastIndex',
    'findLastKey', 'flatMap', 'flatMapDeep', 'flattenDepth', 'forEach',
    'forEachRight', 'forIn', 'forInRight', 'forOwn', 'forOwnRight', 'get',
    'groupBy', 'gt', 'gte', 'has', 'hasIn', 'includes', 'indexOf', 'intersection',
    'invertBy', 'invoke', 'invokeMap', 'isEqual', 'isMatch', 'join', 'keyBy',
    'lastIndexOf', 'lt', 'lte', 'map', 'mapKeys', 'mapValues', 'matchesProperty',
    'maxBy', 'meanBy', 'merge', 'mergeAllWith', 'minBy', 'multiply', 'nth', 'omit',
    'omitBy', 'overArgs', 'pad', 'padEnd', 'padStart', 'parseInt', 'partial',
    'partialRight', 'partition', 'pick', 'pickBy', 'propertyOf', 'pull', 'pullAll',
    'pullAt', 'random', 'range', 'rangeRight', 'rearg', 'reject', 'remove',
    'repeat', 'restFrom', 'result', 'sampleSize', 'some', 'sortBy', 'sortedIndex',
    'sortedIndexOf', 'sortedLastIndex', 'sortedLastIndexOf', 'sortedUniqBy',
    'split', 'spreadFrom', 'startsWith', 'subtract', 'sumBy', 'take', 'takeRight',
    'takeRightWhile', 'takeWhile', 'tap', 'throttle', 'thru', 'times', 'trimChars',
    'trimCharsEnd', 'trimCharsStart', 'truncate', 'union', 'uniqBy', 'uniqWith',
    'unset', 'unzipWith', 'without', 'wrap', 'xor', 'zip', 'zipObject',
    'zipObjectDeep'
  ],
  '3': [
    'assignInWith', 'assignWith', 'clamp', 'differenceBy', 'differenceWith',
    'findFrom', 'findIndexFrom', 'findLastFrom', 'findLastIndexFrom', 'getOr',
    'includesFrom', 'indexOfFrom', 'inRange', 'intersectionBy', 'intersectionWith',
    'invokeArgs', 'invokeArgsMap', 'isEqualWith', 'isMatchWith', 'flatMapDepth',
    'lastIndexOfFrom', 'mergeWith', 'orderBy', 'padChars', 'padCharsEnd',
    'padCharsStart', 'pullAllBy', 'pullAllWith', 'rangeStep', 'rangeStepRight',
    'reduce', 'reduceRight', 'replace', 'set', 'slice', 'sortedIndexBy',
    'sortedLastIndexBy', 'transform', 'unionBy', 'unionWith', 'update', 'xorBy',
    'xorWith', 'zipWith'
  ],
  '4': [
    'fill', 'setWith', 'updateWith'
  ]
};

/** Used to map ary to rearg configs. */
exports.aryRearg = {
  '2': [1, 0],
  '3': [2, 0, 1],
  '4': [3, 2, 0, 1]
};

/** Used to map method names to their iteratee ary. */
exports.iterateeAry = {
  'dropRightWhile': 1,
  'dropWhile': 1,
  'every': 1,
  'filter': 1,
  'find': 1,
  'findFrom': 1,
  'findIndex': 1,
  'findIndexFrom': 1,
  'findKey': 1,
  'findLast': 1,
  'findLastFrom': 1,
  'findLastIndex': 1,
  'findLastIndexFrom': 1,
  'findLastKey': 1,
  'flatMap': 1,
  'flatMapDeep': 1,
  'flatMapDepth': 1,
  'forEach': 1,
  'forEachRight': 1,
  'forIn': 1,
  'forInRight': 1,
  'forOwn': 1,
  'forOwnRight': 1,
  'map': 1,
  'mapKeys': 1,
  'mapValues': 1,
  'partition': 1,
  'reduce': 2,
  'reduceRight': 2,
  'reject': 1,
  'remove': 1,
  'some': 1,
  'takeRightWhile': 1,
  'takeWhile': 1,
  'times': 1,
  'transform': 2
};

/** Used to map method names to iteratee rearg configs. */
exports.iterateeRearg = {
  'mapKeys': [1],
  'reduceRight': [1, 0]
};

/** Used to map method names to rearg configs. */
exports.methodRearg = {
  'assignInAllWith': [1, 0],
  'assignInWith': [1, 2, 0],
  'assignAllWith': [1, 0],
  'assignWith': [1, 2, 0],
  'differenceBy': [1, 2, 0],
  'differenceWith': [1, 2, 0],
  'getOr': [2, 1, 0],
  'intersectionBy': [1, 2, 0],
  'intersectionWith': [1, 2, 0],
  'isEqualWith': [1, 2, 0],
  'isMatchWith': [2, 1, 0],
  'mergeAllWith': [1, 0],
  'mergeWith': [1, 2, 0],
  'padChars': [2, 1, 0],
  'padCharsEnd': [2, 1, 0],
  'padCharsStart': [2, 1, 0],
  'pullAllBy': [2, 1, 0],
  'pullAllWith': [2, 1, 0],
  'rangeStep': [1, 2, 0],
  'rangeStepRight': [1, 2, 0],
  'setWith': [3, 1, 2, 0],
  'sortedIndexBy': [2, 1, 0],
  'sortedLastIndexBy': [2, 1, 0],
  'unionBy': [1, 2, 0],
  'unionWith': [1, 2, 0],
  'updateWith': [3, 1, 2, 0],
  'xorBy': [1, 2, 0],
  'xorWith': [1, 2, 0],
  'zipWith': [1, 2, 0]
};

/** Used to map method names to spread configs. */
exports.methodSpread = {
  'assignAll': { 'start': 0 },
  'assignAllWith': { 'start': 0 },
  'assignInAll': { 'start': 0 },
  'assignInAllWith': { 'start': 0 },
  'defaultsAll': { 'start': 0 },
  'defaultsDeepAll': { 'start': 0 },
  'invokeArgs': { 'start': 2 },
  'invokeArgsMap': { 'start': 2 },
  'mergeAll': { 'start': 0 },
  'mergeAllWith': { 'start': 0 },
  'partial': { 'start': 1 },
  'partialRight': { 'start': 1 },
  'without': { 'start': 1 },
  'zipAll': { 'start': 0 }
};

/** Used to identify methods which mutate arrays or objects. */
exports.mutate = {
  'array': {
    'fill': true,
    'pull': true,
    'pullAll': true,
    'pullAllBy': true,
    'pullAllWith': true,
    'pullAt': true,
    'remove': true,
    'reverse': true
  },
  'object': {
    'assign': true,
    'assignAll': true,
    'assignAllWith': true,
    'assignIn': true,
    'assignInAll': true,
    'assignInAllWith': true,
    'assignInWith': true,
    'assignWith': true,
    'defaults': true,
    'defaultsAll': true,
    'defaultsDeep': true,
    'defaultsDeepAll': true,
    'merge': true,
    'mergeAll': true,
    'mergeAllWith': true,
    'mergeWith': true,
  },
  'set': {
    'set': true,
    'setWith': true,
    'unset': true,
    'update': true,
    'updateWith': true
  }
};

/** Used to map real names to their aliases. */
exports.realToAlias = (function() {
  var hasOwnProperty = Object.prototype.hasOwnProperty,
      object = exports.aliasToReal,
      result = {};

  for (var key in object) {
    var value = object[key];
    if (hasOwnProperty.call(result, value)) {
      result[value].push(key);
    } else {
      result[value] = [key];
    }
  }
  return result;
}());

/** Used to map method names to other names. */
exports.remap = {
  'assignAll': 'assign',
  'assignAllWith': 'assignWith',
  'assignInAll': 'assignIn',
  'assignInAllWith': 'assignInWith',
  'curryN': 'curry',
  'curryRightN': 'curryRight',
  'defaultsAll': 'defaults',
  'defaultsDeepAll': 'defaultsDeep',
  'findFrom': 'find',
  'findIndexFrom': 'findIndex',
  'findLastFrom': 'findLast',
  'findLastIndexFrom': 'findLastIndex',
  'getOr': 'get',
  'includesFrom': 'includes',
  'indexOfFrom': 'indexOf',
  'invokeArgs': 'invoke',
  'invokeArgsMap': 'invokeMap',
  'lastIndexOfFrom': 'lastIndexOf',
  'mergeAll': 'merge',
  'mergeAllWith': 'mergeWith',
  'padChars': 'pad',
  'padCharsEnd': 'padEnd',
  'padCharsStart': 'padStart',
  'propertyOf': 'get',
  'rangeStep': 'range',
  'rangeStepRight': 'rangeRight',
  'restFrom': 'rest',
  'spreadFrom': 'spread',
  'trimChars': 'trim',
  'trimCharsEnd': 'trimEnd',
  'trimCharsStart': 'trimStart',
  'zipAll': 'zip'
};

/** Used to track methods that skip fixing their arity. */
exports.skipFixed = {
  'castArray': true,
  'flow': true,
  'flowRight': true,
  'iteratee': true,
  'mixin': true,
  'rearg': true,
  'runInContext': true
};

/** Used to track methods that skip rearranging arguments. */
exports.skipRearg = {
  'add': true,
  'assign': true,
  'assignIn': true,
  'bind': true,
  'bindKey': true,
  'concat': true,
  'difference': true,
  'divide': true,
  'eq': true,
  'gt': true,
  'gte': true,
  'isEqual': true,
  'lt': true,
  'lte': true,
  'matchesProperty': true,
  'merge': true,
  'multiply': true,
  'overArgs': true,
  'partial': true,
  'partialRight': true,
  'propertyOf': true,
  'random': true,
  'range': true,
  'rangeRight': true,
  'subtract': true,
  'zip': true,
  'zipObject': true,
  'zipObjectDeep': true
};