'use strict';

var toIndexedObject = require('../internals/to-indexed-object');

var addToUnscopables = require('../internals/add-to-unscopables');

var Iterators = require('../internals/iterators');

var InternalStateModule = require('../internals/internal-state');

var defineProperty = require('../internals/object-define-property').f;

var defineIterator = require('../internals/iterator-define');

var createIterResultObject = require('../internals/create-iter-result-object');

var IS_PURE = require('../internals/is-pure');

var DESCRIPTORS = require('../internals/descriptors');

var ARRAY_ITERATOR = 'Array Iterator';

var setInternalState = InternalStateModule.set;

var getInternalState = InternalStateModule.getterFor(ARRAY_ITERATOR);

// `Array.prototype.entries` method

// https://tc39.es/ecma262/#sec-array.prototype.entries

// `Array.prototype.keys` method

// https://tc39.es/ecma262/#sec-array.prototype.keys

// `Array.prototype.values` method

// https://tc39.es/ecma262/#sec-array.prototype.values

// `Array.prototype[@@iterator]` method

// https://tc39.es/ecma262/#sec-array.prototype-@@iterator

// `CreateArrayIterator` internal method

// https://tc39.es/ecma262/#sec-createarrayiterator

module.exports = defineIterator(Array, 'Array', function (iterated, kind) {

setInternalState(this, {

type: ARRAY_ITERATOR,

target: toIndexedObject(iterated), // target

index: 0, // next index

kind: kind // kind

});

// `%ArrayIteratorPrototype%.next` method

// https://tc39.es/ecma262/#sec-%arrayiteratorprototype%.next

}, function () {

var state = getInternalState(this);

var target = state.target;

var index = state.index++;

if (!target || index >= target.length) {

state.target = null;

return createIterResultObject(undefined, true);

}

switch (state.kind) {

case 'keys': return createIterResultObject(index, false);

case 'values': return createIterResultObject(target[index], false);

} return createIterResultObject([index, target[index]], false);

}, 'values');

// argumentsList[@@iterator] is %ArrayProto_values%

// https://tc39.es/ecma262/#sec-createunmappedargumentsobject

// https://tc39.es/ecma262/#sec-createmappedargumentsobject

var values = Iterators.Arguments = Iterators.Array;

// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables

addToUnscopables('keys');

addToUnscopables('values');

addToUnscopables('entries');

// V8 ~ Chrome 45- bug

if (!IS_PURE && DESCRIPTORS && values.name !== 'values') try {

defineProperty(values, 'name', { value: 'values' });

} catch (error) { /* empty */ }