/**
 * Copyright © 2016 Magento. All rights reserved.
 * See COPYING.txt for license details.
 */
/*jshint eqnull:true browser:true jquery:true*/
/*global jQuery*/
(function (factory) {
    'use strict';

    if (typeof define === 'function' && define.amd) {
        define([
            'jquery',
            'mage/mage',
            'jquery/jquery.cookie'
        ], factory);
    } else {
        factory(jQuery);
    }
}(function ($) {
    'use strict';

    /**
     * Helper for cookies manipulation
     * @returns {CookieHelper}
     * @constructor
     */
    var CookieHelper = function () {

        /**
         * Cookie default values.
         * @type {Object}
         */
        this.defaults = {
            expires: null,
            path: '/',
            domain: null,
            secure: false,
            lifetime: null
        };

        /**
         * Calculate cookie expiration date based on its lifetime.
         * @param {Object} options - Cookie option values
         * @return {Date|null} Calculated cookie expiration date or null if no lifetime provided.
         * @private
         */
        function lifetimeToExpires(options, defaults) {
            var expires,
                lifetime;

            lifetime = options.lifetime || defaults.lifetime;

            if (lifetime && lifetime > 0) {
                expires = options.expires || new Date();
                
                return new Date(expires.getTime() + lifetime * 1000);
            }

            return null;
        }

        /**
         * Set a cookie's value by cookie name based on optional cookie options.
         * @param {String} name - The name of the cookie.
         * @param {String} value - The cookie's value.
         * @param {Object} options - Optional options (e.g. lifetime, expires, path, etc.)
         */
        this.set = function (name, value, options) {
            var expires,
                path,
                domain,
                secure;

            options = $.extend({}, this.defaults, options || {});
            expires = lifetimeToExpires(options, this.defaults) || options.expires;
            path = options.path;
            domain = options.domain;
            secure = options.secure;

            document.cookie = name + '=' + encodeURIComponent(value) +
                (expires ? '; expires=' + expires.toGMTString() :  '') +
                (path ? '; path=' + path : '') +
                (domain ? '; domain=' + domain : '') +
                (secure ? '; secure' : '');
        };

        /**
         * Get a cookie's value by cookie name.
         * @param {String} name  - The name of the cookie.
         * @return {(null|String)}
         */
        this.get = function (name) {
            var arg = name + '=',
                aLength = arg.length,
                cLength = document.cookie.length,
                i = 0,
                j = 0;

            while (i < cLength) {
                j = i + aLength;

                if (document.cookie.substring(i, j) === arg) {
                    return this.getCookieVal(j);
                }
                i = document.cookie.indexOf(' ', i) + 1;

                if (i === 0) {
                    break;
                }
            }

            return null;
        };

        /**
         * Clear a cookie's value by name.
         * @param {String} name - The name of the cookie being cleared.
         */
        this.clear = function (name) {
            if (this.get(name)) {
                this.set(name, '', {
                    expires: new Date('Jan 01 1970 00:00:01 GMT')
                });
            }
        };

        /**
         * Return URI decoded cookie component value (e.g. expires, path, etc.) based on a
         * numeric offset in the document's cookie value.
         * @param {Number} offset - Offset into the document's cookie value.
         * @return {String}
         */
        this.getCookieVal = function (offset) {
            var endstr = document.cookie.indexOf(';', offset);

            if (endstr === -1) {
                endstr = document.cookie.length;
            }

            return decodeURIComponent(document.cookie.substring(offset, endstr));
        };

        return this;
    };

    $.extend(true, $, {
        mage: {
            cookies: new CookieHelper()
        }
    });

    return function (pageOptions) {
        $.extend($.mage.cookies.defaults, pageOptions);
        $.extend($.cookie.defaults, $.mage.cookies.defaults);
    };
}));
