/**
 * The MIT License (MIT)
 * 
 * Copyright (c) 2014 Petka Antonov
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:</p>
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * 
 */
"use strict";
module.exports = function(Promise, INTERNAL, tryConvertToPromise) {
var apiRejection = require("./errors_api_rejection.js")(Promise);
var isArray = require("./util.js").isArray;

var raceLater = function (promise) {
    return promise.then(function(array) {
        return race(array, promise);
    });
};

var hasOwn = {}.hasOwnProperty;
function race(promises, parent) {
    var maybePromise = tryConvertToPromise(promises, undefined);

    if (maybePromise instanceof Promise) {
        return raceLater(maybePromise);
    } else if (!isArray(promises)) {
        return apiRejection("expecting an array, a promise or a thenable\u000a\u000a    See http://goo.gl/s8MMhc\u000a");
    }

    var ret = new Promise(INTERNAL);
    if (parent !== undefined) {
        ret._propagateFrom(parent, 7);
    } else {
        ret._setTrace(undefined);
    }
    var fulfill = ret._fulfill;
    var reject = ret._reject;
    for (var i = 0, len = promises.length; i < len; ++i) {
        var val = promises[i];

        if (val === undefined && !(hasOwn.call(promises, i))) {
            continue;
        }

        Promise.cast(val)._then(fulfill, reject, undefined, ret, null);
    }
    return ret;
}

Promise.race = function (promises) {
    return race(promises, undefined);
};

Promise.prototype.race = function () {
    return race(this, undefined);
};

};
