'use strict';

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

var $Object = GetIntrinsic('%Object%');
var $EvalError = GetIntrinsic('%EvalError%');
var $TypeError = GetIntrinsic('%TypeError%');
var $String = GetIntrinsic('%String%');
var $Date = GetIntrinsic('%Date%');
var $Number = GetIntrinsic('%Number%');
var $floor = GetIntrinsic('%Math.floor%');
var $DateUTC = GetIntrinsic('%Date.UTC%');
var $abs = GetIntrinsic('%Math.abs%');

var assertRecord = require('./helpers/assertRecord');
var isPropertyDescriptor = require('./helpers/isPropertyDescriptor');
var $isNaN = require('./helpers/isNaN');
var $isFinite = require('./helpers/isFinite');
var sign = require('./helpers/sign');
var mod = require('./helpers/mod');
var isPrefixOf = require('./helpers/isPrefixOf');
var callBound = require('./helpers/callBound');

var IsCallable = require('is-callable');
var toPrimitive = require('es-to-primitive/es5');

var has = require('has');

var $getUTCFullYear = callBound('Date.prototype.getUTCFullYear');

var HoursPerDay = 24;
var MinutesPerHour = 60;
var SecondsPerMinute = 60;
var msPerSecond = 1e3;
var msPerMinute = msPerSecond * SecondsPerMinute;
var msPerHour = msPerMinute * MinutesPerHour;
var msPerDay = 86400000;

// https://es5.github.io/#x9
var ES5 = {
	ToPrimitive: toPrimitive,

	ToBoolean: function ToBoolean(value) {
		return !!value;
	},
	ToNumber: function ToNumber(value) {
		return +value; // eslint-disable-line no-implicit-coercion
	},
	ToInteger: function ToInteger(value) {
		var number = this.ToNumber(value);
		if ($isNaN(number)) { return 0; }
		if (number === 0 || !$isFinite(number)) { return number; }
		return sign(number) * Math.floor(Math.abs(number));
	},
	ToInt32: function ToInt32(x) {
		return this.ToNumber(x) >> 0;
	},
	ToUint32: function ToUint32(x) {
		return this.ToNumber(x) >>> 0;
	},
	ToUint16: function ToUint16(value) {
		var number = this.ToNumber(value);
		if ($isNaN(number) || number === 0 || !$isFinite(number)) { return 0; }
		var posInt = sign(number) * Math.floor(Math.abs(number));
		return mod(posInt, 0x10000);
	},
	ToString: function ToString(value) {
		return $String(value);
	},
	ToObject: function ToObject(value) {
		this.CheckObjectCoercible(value);
		return $Object(value);
	},
	CheckObjectCoercible: function CheckObjectCoercible(value, optMessage) {
		/* jshint eqnull:true */
		if (value == null) {
			throw new $TypeError(optMessage || 'Cannot call method on ' + value);
		}
		return value;
	},
	IsCallable: IsCallable,
	SameValue: function SameValue(x, y) {
		if (x === y) { // 0 === -0, but they are not identical.
			if (x === 0) { return 1 / x === 1 / y; }
			return true;
		}
		return $isNaN(x) && $isNaN(y);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-8
	Type: function Type(x) {
		if (x === null) {
			return 'Null';
		}
		if (typeof x === 'undefined') {
			return 'Undefined';
		}
		if (typeof x === 'function' || typeof x === 'object') {
			return 'Object';
		}
		if (typeof x === 'number') {
			return 'Number';
		}
		if (typeof x === 'boolean') {
			return 'Boolean';
		}
		if (typeof x === 'string') {
			return 'String';
		}
	},

	// https://ecma-international.org/ecma-262/6.0/#sec-property-descriptor-specification-type
	IsPropertyDescriptor: function IsPropertyDescriptor(Desc) {
		return isPropertyDescriptor(this, Desc);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-8.10.1
	IsAccessorDescriptor: function IsAccessorDescriptor(Desc) {
		if (typeof Desc === 'undefined') {
			return false;
		}

		assertRecord(this, 'Property Descriptor', 'Desc', Desc);

		if (!has(Desc, '[[Get]]') && !has(Desc, '[[Set]]')) {
			return false;
		}

		return true;
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-8.10.2
	IsDataDescriptor: function IsDataDescriptor(Desc) {
		if (typeof Desc === 'undefined') {
			return false;
		}

		assertRecord(this, 'Property Descriptor', 'Desc', Desc);

		if (!has(Desc, '[[Value]]') && !has(Desc, '[[Writable]]')) {
			return false;
		}

		return true;
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-8.10.3
	IsGenericDescriptor: function IsGenericDescriptor(Desc) {
		if (typeof Desc === 'undefined') {
			return false;
		}

		assertRecord(this, 'Property Descriptor', 'Desc', Desc);

		if (!this.IsAccessorDescriptor(Desc) && !this.IsDataDescriptor(Desc)) {
			return true;
		}

		return false;
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-8.10.4
	FromPropertyDescriptor: function FromPropertyDescriptor(Desc) {
		if (typeof Desc === 'undefined') {
			return Desc;
		}

		assertRecord(this, 'Property Descriptor', 'Desc', Desc);

		if (this.IsDataDescriptor(Desc)) {
			return {
				value: Desc['[[Value]]'],
				writable: !!Desc['[[Writable]]'],
				enumerable: !!Desc['[[Enumerable]]'],
				configurable: !!Desc['[[Configurable]]']
			};
		} else if (this.IsAccessorDescriptor(Desc)) {
			return {
				get: Desc['[[Get]]'],
				set: Desc['[[Set]]'],
				enumerable: !!Desc['[[Enumerable]]'],
				configurable: !!Desc['[[Configurable]]']
			};
		} else {
			throw new $TypeError('FromPropertyDescriptor must be called with a fully populated Property Descriptor');
		}
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-8.10.5
	ToPropertyDescriptor: function ToPropertyDescriptor(Obj) {
		if (this.Type(Obj) !== 'Object') {
			throw new $TypeError('ToPropertyDescriptor requires an object');
		}

		var desc = {};
		if (has(Obj, 'enumerable')) {
			desc['[[Enumerable]]'] = this.ToBoolean(Obj.enumerable);
		}
		if (has(Obj, 'configurable')) {
			desc['[[Configurable]]'] = this.ToBoolean(Obj.configurable);
		}
		if (has(Obj, 'value')) {
			desc['[[Value]]'] = Obj.value;
		}
		if (has(Obj, 'writable')) {
			desc['[[Writable]]'] = this.ToBoolean(Obj.writable);
		}
		if (has(Obj, 'get')) {
			var getter = Obj.get;
			if (typeof getter !== 'undefined' && !this.IsCallable(getter)) {
				throw new TypeError('getter must be a function');
			}
			desc['[[Get]]'] = getter;
		}
		if (has(Obj, 'set')) {
			var setter = Obj.set;
			if (typeof setter !== 'undefined' && !this.IsCallable(setter)) {
				throw new $TypeError('setter must be a function');
			}
			desc['[[Set]]'] = setter;
		}

		if ((has(desc, '[[Get]]') || has(desc, '[[Set]]')) && (has(desc, '[[Value]]') || has(desc, '[[Writable]]'))) {
			throw new $TypeError('Invalid property descriptor. Cannot both specify accessors and a value or writable attribute');
		}
		return desc;
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-11.9.3
	'Abstract Equality Comparison': function AbstractEqualityComparison(x, y) {
		var xType = this.Type(x);
		var yType = this.Type(y);
		if (xType === yType) {
			return x === y; // ES6+ specified this shortcut anyways.
		}
		if (x == null && y == null) {
			return true;
		}
		if (xType === 'Number' && yType === 'String') {
			return this['Abstract Equality Comparison'](x, this.ToNumber(y));
		}
		if (xType === 'String' && yType === 'Number') {
			return this['Abstract Equality Comparison'](this.ToNumber(x), y);
		}
		if (xType === 'Boolean') {
			return this['Abstract Equality Comparison'](this.ToNumber(x), y);
		}
		if (yType === 'Boolean') {
			return this['Abstract Equality Comparison'](x, this.ToNumber(y));
		}
		if ((xType === 'String' || xType === 'Number') && yType === 'Object') {
			return this['Abstract Equality Comparison'](x, this.ToPrimitive(y));
		}
		if (xType === 'Object' && (yType === 'String' || yType === 'Number')) {
			return this['Abstract Equality Comparison'](this.ToPrimitive(x), y);
		}
		return false;
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-11.9.6
	'Strict Equality Comparison': function StrictEqualityComparison(x, y) {
		var xType = this.Type(x);
		var yType = this.Type(y);
		if (xType !== yType) {
			return false;
		}
		if (xType === 'Undefined' || xType === 'Null') {
			return true;
		}
		return x === y; // shortcut for steps 4-7
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-11.8.5
	// eslint-disable-next-line max-statements
	'Abstract Relational Comparison': function AbstractRelationalComparison(x, y, LeftFirst) {
		if (this.Type(LeftFirst) !== 'Boolean') {
			throw new $TypeError('Assertion failed: LeftFirst argument must be a Boolean');
		}
		var px;
		var py;
		if (LeftFirst) {
			px = this.ToPrimitive(x, $Number);
			py = this.ToPrimitive(y, $Number);
		} else {
			py = this.ToPrimitive(y, $Number);
			px = this.ToPrimitive(x, $Number);
		}
		var bothStrings = this.Type(px) === 'String' && this.Type(py) === 'String';
		if (!bothStrings) {
			var nx = this.ToNumber(px);
			var ny = this.ToNumber(py);
			if ($isNaN(nx) || $isNaN(ny)) {
				return undefined;
			}
			if ($isFinite(nx) && $isFinite(ny) && nx === ny) {
				return false;
			}
			if (nx === 0 && ny === 0) {
				return false;
			}
			if (nx === Infinity) {
				return false;
			}
			if (ny === Infinity) {
				return true;
			}
			if (ny === -Infinity) {
				return false;
			}
			if (nx === -Infinity) {
				return true;
			}
			return nx < ny; // by now, these are both nonzero, finite, and not equal
		}
		if (isPrefixOf(py, px)) {
			return false;
		}
		if (isPrefixOf(px, py)) {
			return true;
		}
		return px < py; // both strings, neither a prefix of the other. shortcut for steps c-f
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.10
	msFromTime: function msFromTime(t) {
		return mod(t, msPerSecond);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.10
	SecFromTime: function SecFromTime(t) {
		return mod($floor(t / msPerSecond), SecondsPerMinute);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.10
	MinFromTime: function MinFromTime(t) {
		return mod($floor(t / msPerMinute), MinutesPerHour);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.10
	HourFromTime: function HourFromTime(t) {
		return mod($floor(t / msPerHour), HoursPerDay);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.2
	Day: function Day(t) {
		return $floor(t / msPerDay);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.2
	TimeWithinDay: function TimeWithinDay(t) {
		return mod(t, msPerDay);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.3
	DayFromYear: function DayFromYear(y) {
		return (365 * (y - 1970)) + $floor((y - 1969) / 4) - $floor((y - 1901) / 100) + $floor((y - 1601) / 400);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.3
	TimeFromYear: function TimeFromYear(y) {
		return msPerDay * this.DayFromYear(y);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.3
	YearFromTime: function YearFromTime(t) {
		// largest y such that this.TimeFromYear(y) <= t
		return $getUTCFullYear(new $Date(t));
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.6
	WeekDay: function WeekDay(t) {
		return mod(this.Day(t) + 4, 7);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.3
	DaysInYear: function DaysInYear(y) {
		if (mod(y, 4) !== 0) {
			return 365;
		}
		if (mod(y, 100) !== 0) {
			return 366;
		}
		if (mod(y, 400) !== 0) {
			return 365;
		}
		return 366;
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.3
	InLeapYear: function InLeapYear(t) {
		var days = this.DaysInYear(this.YearFromTime(t));
		if (days === 365) {
			return 0;
		}
		if (days === 366) {
			return 1;
		}
		throw new $EvalError('Assertion failed: there are not 365 or 366 days in a year, got: ' + days);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.4
	DayWithinYear: function DayWithinYear(t) {
		return this.Day(t) - this.DayFromYear(this.YearFromTime(t));
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.4
	MonthFromTime: function MonthFromTime(t) {
		var day = this.DayWithinYear(t);
		if (0 <= day && day < 31) {
			return 0;
		}
		var leap = this.InLeapYear(t);
		if (31 <= day && day < (59 + leap)) {
			return 1;
		}
		if ((59 + leap) <= day && day < (90 + leap)) {
			return 2;
		}
		if ((90 + leap) <= day && day < (120 + leap)) {
			return 3;
		}
		if ((120 + leap) <= day && day < (151 + leap)) {
			return 4;
		}
		if ((151 + leap) <= day && day < (181 + leap)) {
			return 5;
		}
		if ((181 + leap) <= day && day < (212 + leap)) {
			return 6;
		}
		if ((212 + leap) <= day && day < (243 + leap)) {
			return 7;
		}
		if ((243 + leap) <= day && day < (273 + leap)) {
			return 8;
		}
		if ((273 + leap) <= day && day < (304 + leap)) {
			return 9;
		}
		if ((304 + leap) <= day && day < (334 + leap)) {
			return 10;
		}
		if ((334 + leap) <= day && day < (365 + leap)) {
			return 11;
		}
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.5
	DateFromTime: function DateFromTime(t) {
		var m = this.MonthFromTime(t);
		var d = this.DayWithinYear(t);
		if (m === 0) {
			return d + 1;
		}
		if (m === 1) {
			return d - 30;
		}
		var leap = this.InLeapYear(t);
		if (m === 2) {
			return d - 58 - leap;
		}
		if (m === 3) {
			return d - 89 - leap;
		}
		if (m === 4) {
			return d - 119 - leap;
		}
		if (m === 5) {
			return d - 150 - leap;
		}
		if (m === 6) {
			return d - 180 - leap;
		}
		if (m === 7) {
			return d - 211 - leap;
		}
		if (m === 8) {
			return d - 242 - leap;
		}
		if (m === 9) {
			return d - 272 - leap;
		}
		if (m === 10) {
			return d - 303 - leap;
		}
		if (m === 11) {
			return d - 333 - leap;
		}
		throw new $EvalError('Assertion failed: MonthFromTime returned an impossible value: ' + m);
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.12
	MakeDay: function MakeDay(year, month, date) {
		if (!$isFinite(year) || !$isFinite(month) || !$isFinite(date)) {
			return NaN;
		}
		var y = this.ToInteger(year);
		var m = this.ToInteger(month);
		var dt = this.ToInteger(date);
		var ym = y + $floor(m / 12);
		var mn = mod(m, 12);
		var t = $DateUTC(ym, mn, 1);
		if (this.YearFromTime(t) !== ym || this.MonthFromTime(t) !== mn || this.DateFromTime(t) !== 1) {
			return NaN;
		}
		return this.Day(t) + dt - 1;
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.13
	MakeDate: function MakeDate(day, time) {
		if (!$isFinite(day) || !$isFinite(time)) {
			return NaN;
		}
		return (day * msPerDay) + time;
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.11
	MakeTime: function MakeTime(hour, min, sec, ms) {
		if (!$isFinite(hour) || !$isFinite(min) || !$isFinite(sec) || !$isFinite(ms)) {
			return NaN;
		}
		var h = this.ToInteger(hour);
		var m = this.ToInteger(min);
		var s = this.ToInteger(sec);
		var milli = this.ToInteger(ms);
		var t = (h * msPerHour) + (m * msPerMinute) + (s * msPerSecond) + milli;
		return t;
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.14
	TimeClip: function TimeClip(time) {
		if (!$isFinite(time) || $abs(time) > 8.64e15) {
			return NaN;
		}
		return $Number(new $Date(this.ToNumber(time)));
	},

	// https://ecma-international.org/ecma-262/5.1/#sec-5.2
	modulo: function modulo(x, y) {
		return mod(x, y);
	}
};

module.exports = ES5;