'use strict';

var forEach = require('foreach');
var availableTypedArrays = require('available-typed-arrays');
var callBound = require('es-abstract/helpers/callBound');

var $toString = callBound('Object.prototype.toString');
var hasSymbols = require('has-symbols')();
var hasToStringTag = hasSymbols && typeof Symbol.toStringTag === 'symbol';

var typedArrays = availableTypedArrays();

var $indexOf = callBound('Array.prototype.indexOf', true) || function indexOf(array, value) {
	for (var i = 0; i < array.length; i += 1) {
		if (array[i] === value) {
			return i;
		}
	}
	return -1;
};
var $slice = callBound('String.prototype.slice');
var toStrTags = {};
var gOPD = require('es-abstract/helpers/getOwnPropertyDescriptor');
var getPrototypeOf = Object.getPrototypeOf; // require('getprototypeof');
if (hasToStringTag && gOPD && getPrototypeOf) {
	forEach(typedArrays, function (typedArray) {
		var arr = new global[typedArray]();
		if (!(Symbol.toStringTag in arr)) {
			throw new EvalError('this engine has support for Symbol.toStringTag, but ' + typedArray + ' does not have the property! Please report this.');
		}
		var proto = getPrototypeOf(arr);
		var descriptor = gOPD(proto, Symbol.toStringTag);
		if (!descriptor) {
			var superProto = getPrototypeOf(proto);
			descriptor = gOPD(superProto, Symbol.toStringTag);
		}
		toStrTags[typedArray] = descriptor.get;
	});
}

var tryTypedArrays = function tryAllTypedArrays(value) {
	var anyTrue = false;
	forEach(toStrTags, function (getter, typedArray) {
		if (!anyTrue) {
			try {
				anyTrue = getter.call(value) === typedArray;
			} catch (e) { /**/ }
		}
	});
	return anyTrue;
};

module.exports = function isTypedArray(value) {
	if (!value || typeof value !== 'object') { return false; }
	if (!hasToStringTag) {
		var tag = $slice($toString(value), 8, -1);
		return $indexOf(typedArrays, tag) > -1;
	}
	if (!gOPD) { return false; }
	return tryTypedArrays(value);
};