'use strict';

var GetIntrinsic = require('./GetIntrinsic');

var keys = require('object-keys'); var inspect = require('object-inspect');

var ES2017 = require('./es2017'); var assign = require('./helpers/assign'); var forEach = require('./helpers/forEach'); var callBind = require('./helpers/callBind'); var every = require('./helpers/every'); var isPrefixOf = require('./helpers/isPrefixOf');

var $String = GetIntrinsic('%String%'); var $TypeError = GetIntrinsic('%TypeError%');

var callBound = require('./helpers/callBound'); var regexTester = require('./helpers/regexTester'); var $isNaN = require('./helpers/isNaN');

var $SymbolValueOf = callBound('Symbol.prototype.valueOf', true); // var $charAt = callBound('String.prototype.charAt'); var $strSlice = callBound('String.prototype.slice'); var $indexOf = callBound('String.prototype.indexOf'); var $parseInt = parseInt;

var isDigit = regexTester(/^$/);

var $PromiseResolve = callBound('Promise.resolve', true);

var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable'); var $pushApply = callBind.apply(GetIntrinsic('%Array.prototype.push%')); var $gOPS = $SymbolValueOf ? GetIntrinsic('%Object.getOwnPropertySymbols%') : null;

var padTimeComponent = function padTimeComponent(c, count) {

return $strSlice('00' + c, -(count || 2));

};

var weekdays = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']; var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];

var OwnPropertyKeys = function OwnPropertyKeys(ES, source) {

var ownKeys = keys(source);
if ($gOPS) {
        $pushApply(ownKeys, $gOPS(source));
}
return ownKeys;

};

var ES2018 = assign(assign({}, ES2017), {

EnumerableOwnPropertyNames: ES2017.EnumerableOwnProperties,

// https://ecma-international.org/ecma-262/9.0/#sec-thissymbolvalue
thisSymbolValue: function thisSymbolValue(value) {
        if (!$SymbolValueOf) {
                throw new SyntaxError('Symbols are not supported; thisSymbolValue requires that `value` be a Symbol or a Symbol object');
        }
        if (this.Type(value) === 'Symbol') {
                return value;
        }
        return $SymbolValueOf(value);
},

// https://www.ecma-international.org/ecma-262/9.0/#sec-isstringprefix
IsStringPrefix: function IsStringPrefix(p, q) {
        if (this.Type(p) !== 'String') {
                throw new TypeError('Assertion failed: "p" must be a String');
        }

        if (this.Type(q) !== 'String') {
                throw new TypeError('Assertion failed: "q" must be a String');
        }

        return isPrefixOf(p, q);
        /*
        if (p === q || p === '') {
                return true;
        }

        var pLength = p.length;
        var qLength = q.length;
        if (pLength >= qLength) {
                return false;
        }

        // assert: pLength < qLength

        for (var i = 0; i < pLength; i += 1) {
                if ($charAt(p, i) !== $charAt(q, i)) {
                        return false;
                }
        }
        return true;
        */
},

// https://www.ecma-international.org/ecma-262/9.0/#sec-tostring-applied-to-the-number-type
NumberToString: function NumberToString(m) {
        if (this.Type(m) !== 'Number') {
                throw new TypeError('Assertion failed: "m" must be a String');
        }

        return $String(m);
},

// https://www.ecma-international.org/ecma-262/9.0/#sec-copydataproperties
CopyDataProperties: function CopyDataProperties(target, source, excludedItems) {
        if (this.Type(target) !== 'Object') {
                throw new TypeError('Assertion failed: "target" must be an Object');
        }

        if (!this.IsArray(excludedItems)) {
                throw new TypeError('Assertion failed: "excludedItems" must be a List of Property Keys');
        }
        for (var i = 0; i < excludedItems.length; i += 1) {
                if (!this.IsPropertyKey(excludedItems[i])) {
                        throw new TypeError('Assertion failed: "excludedItems" must be a List of Property Keys');
                }
        }

        if (typeof source === 'undefined' || source === null) {
                return target;
        }

        var ES = this;

        var fromObj = ES.ToObject(source);

        var sourceKeys = OwnPropertyKeys(ES, fromObj);
        forEach(sourceKeys, function (nextKey) {
                var excluded = false;

                forEach(excludedItems, function (e) {
                        if (ES.SameValue(e, nextKey) === true) {
                                excluded = true;
                        }
                });

                var enumerable = $isEnumerable(fromObj, nextKey) || (
                        // this is to handle string keys being non-enumerable in older engines
                        typeof source === 'string'
                        && nextKey >= 0
                        && ES.IsInteger(ES.ToNumber(nextKey))
                );
                if (excluded === false && enumerable) {
                        var propValue = ES.Get(fromObj, nextKey);
                        ES.CreateDataProperty(target, nextKey, propValue);
                }
        });

        return target;
},

// https://ecma-international.org/ecma-262/9.0/#sec-promise-resolve
PromiseResolve: function PromiseResolve(C, x) {
        if (!$PromiseResolve) {
                throw new SyntaxError('This environment does not support Promises.');
        }
        return $PromiseResolve(C, x);
},

// http://www.ecma-international.org/ecma-262/9.0/#sec-getsubstitution
// eslint-disable-next-line max-statements, max-params, max-lines-per-function
GetSubstitution: function GetSubstitution(matched, str, position, captures, namedCaptures, replacement) {
        if (this.Type(matched) !== 'String') {
                throw new $TypeError('Assertion failed: `matched` must be a String');
        }
        var matchLength = matched.length;

        if (this.Type(str) !== 'String') {
                throw new $TypeError('Assertion failed: `str` must be a String');
        }
        var stringLength = str.length;

        if (!this.IsInteger(position) || position < 0 || position > stringLength) {
                throw new $TypeError('Assertion failed: `position` must be a nonnegative integer, and less than or equal to the length of `string`, got ' + inspect(position));
        }

        var ES = this;
        var isStringOrHole = function (capture, index, arr) { return ES.Type(capture) === 'String' || !(index in arr); };
        if (!this.IsArray(captures) || !every(captures, isStringOrHole)) {
                throw new $TypeError('Assertion failed: `captures` must be a List of Strings, got ' + inspect(captures));
        }

        if (this.Type(replacement) !== 'String') {
                throw new $TypeError('Assertion failed: `replacement` must be a String');
        }

        var tailPos = position + matchLength;
        var m = captures.length;
        if (this.Type(namedCaptures) !== 'Undefined') {
                namedCaptures = this.ToObject(namedCaptures); // eslint-disable-line no-param-reassign
        }

        var result = '';
        for (var i = 0; i < replacement.length; i += 1) {
                // if this is a $, and it's not the end of the replacement
                var current = replacement[i];
                var isLast = (i + 1) >= replacement.length;
                var nextIsLast = (i + 2) >= replacement.length;
                if (current === '$' && !isLast) {
                        var next = replacement[i + 1];
                        if (next === '$') {
                                result += '$';
                                i += 1;
                        } else if (next === '&') {
                                result += matched;
                                i += 1;
                        } else if (next === '`') {
                                result += position === 0 ? '' : $strSlice(str, 0, position - 1);
                                i += 1;
                        } else if (next === "'") {
                                result += tailPos >= stringLength ? '' : $strSlice(str, tailPos);
                                i += 1;
                        } else {
                                var nextNext = nextIsLast ? null : replacement[i + 2];
                                if (isDigit(next) && next !== '0' && (nextIsLast || !isDigit(nextNext))) {
                                        // $1 through $9, and not followed by a digit
                                        var n = $parseInt(next, 10);
                                        // if (n > m, impl-defined)
                                        result += (n <= m && this.Type(captures[n - 1]) === 'Undefined') ? '' : captures[n - 1];
                                        i += 1;
                                } else if (isDigit(next) && (nextIsLast || isDigit(nextNext))) {
                                        // $00 through $99
                                        var nn = next + nextNext;
                                        var nnI = $parseInt(nn, 10) - 1;
                                        // if nn === '00' or nn > m, impl-defined
                                        result += (nn <= m && this.Type(captures[nnI]) === 'Undefined') ? '' : captures[nnI];
                                        i += 2;
                                } else if (next === '<') {
                                        // eslint-disable-next-line max-depth
                                        if (this.Type(namedCaptures) === 'Undefined') {
                                                result += '$<';
                                                i += 2;
                                        } else {
                                                var endIndex = $indexOf(replacement, '>', i);
                                                // eslint-disable-next-line max-depth
                                                if (endIndex > -1) {
                                                        var groupName = $strSlice(replacement, i, endIndex);
                                                        var capture = this.Get(namedCaptures, groupName);
                                                        // eslint-disable-next-line max-depth
                                                        if (this.Type(capture) !== 'Undefined') {
                                                                result += this.ToString(capture);
                                                        }
                                                        i += '$<' + groupName + '>'.length;
                                                }
                                        }
                                } else {
                                        result += '$';
                                }
                        }
                } else {
                        // the final $, or else not a $
                        result += replacement[i];
                }
        }
        return result;
},

// https://www.ecma-international.org/ecma-262/9.0/#sec-datestring
DateString: function DateString(tv) {
        if (this.Type(tv) !== 'Number' || $isNaN(tv)) {
                throw new $TypeError('Assertion failed: `tv` must be a non-NaN Number');
        }
        var weekday = weekdays[this.WeekDay(tv)];
        var month = months[this.MonthFromTime(tv)];
        var day = padTimeComponent(this.DateFromTime(tv));
        var year = padTimeComponent(this.YearFromTime(tv), 4);
        return weekday + '\x20' + month + '\x20' + day + '\x20' + year;
},

// https://www.ecma-international.org/ecma-262/9.0/#sec-timestring
TimeString: function TimeString(tv) {
        if (this.Type(tv) !== 'Number' || $isNaN(tv)) {
                throw new $TypeError('Assertion failed: `tv` must be a non-NaN Number');
        }
        var hour = this.HourFromTime(tv);
        var minute = this.MinFromTime(tv);
        var second = this.SecFromTime(tv);
        return padTimeComponent(hour) + ':' + padTimeComponent(minute) + ':' + padTimeComponent(second) + '\x20GMT';
}

});

delete ES2018.EnumerableOwnProperties; // replaced with EnumerableOwnPropertyNames

delete ES2018.IsPropertyDescriptor; // not an actual abstract operation

module.exports = ES2018;