'use strict';

var hasSymbols = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol';

var isPrimitive = require('./helpers/isPrimitive'); var isCallable = require('is-callable'); var isDate = require('is-date-object'); var isSymbol = require('is-symbol');

var ordinaryToPrimitive = function OrdinaryToPrimitive(O, hint) {

if (typeof O === 'undefined' || O === null) {
        throw new TypeError('Cannot call method on ' + O);
}
if (typeof hint !== 'string' || (hint !== 'number' && hint !== 'string')) {
        throw new TypeError('hint must be "string" or "number"');
}
var methodNames = hint === 'string' ? ['toString', 'valueOf'] : ['valueOf', 'toString'];
var method, result, i;
for (i = 0; i < methodNames.length; ++i) {
        method = O[methodNames[i]];
        if (isCallable(method)) {
                result = method.call(O);
                if (isPrimitive(result)) {
                        return result;
                }
        }
}
throw new TypeError('No default value');

};

var GetMethod = function GetMethod(O, P) {

var func = O[P];
if (func !== null && typeof func !== 'undefined') {
        if (!isCallable(func)) {
                throw new TypeError(func + ' returned for property ' + P + ' of object ' + O + ' is not a function');
        }
        return func;
}
return void 0;

};

// www.ecma-international.org/ecma-262/6.0/#sec-toprimitive module.exports = function ToPrimitive(input) {

if (isPrimitive(input)) {
        return input;
}
var hint = 'default';
if (arguments.length > 1) {
        if (arguments[1] === String) {
                hint = 'string';
        } else if (arguments[1] === Number) {
                hint = 'number';
        }
}

var exoticToPrim;
if (hasSymbols) {
        if (Symbol.toPrimitive) {
                exoticToPrim = GetMethod(input, Symbol.toPrimitive);
        } else if (isSymbol(input)) {
                exoticToPrim = Symbol.prototype.valueOf;
        }
}
if (typeof exoticToPrim !== 'undefined') {
        var result = exoticToPrim.call(input, hint);
        if (isPrimitive(result)) {
                return result;
        }
        throw new TypeError('unable to convert exotic object to primitive');
}
if (hint === 'default' && (isDate(input) || isSymbol(input))) {
        hint = 'string';
}
return ordinaryToPrimitive(input, hint === 'default' ? 'number' : hint);

};