/*
 *
 * (c) Copyright Ascensio System Limited 2010-2018
 *
 * This program is freeware. You can redistribute it and/or modify it under the terms of the GNU 
 * General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html). 
 * In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that 
 * Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
 *
 * THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
 *
 * You can contact Ascensio System SIA by email at sales@onlyoffice.com
 *
 * The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display 
 * Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
 *
 * Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains 
 * relevant author attributions when distributing the software. If the display of the logo in its graphic 
 * form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE" 
 * in every copy of the program you distribute. 
 * Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
 *
*/


using System;
using System.Web;

using Microsoft.AspNetCore.Http;

namespace ASC.Web.Core.Utility
{
    public static class UrlSwitcher
    {
        public static string SelectCurrentUriScheme(this HttpContext httpContext, string uri)
        {
            return httpContext != null ? SelectUriScheme(uri, httpContext.Request.GetUrlRewriter().Scheme) : uri;
        }

        public static string SelectUriScheme(string uri, string scheme)
        {
            return Uri.IsWellFormedUriString(uri, UriKind.Absolute) ? SelectUriScheme(new Uri(uri, UriKind.Absolute), scheme).ToString() : uri;
        }

        public static Uri SelectCurrentUriScheme(this HttpContext httpContext, Uri uri)
        {
            if (httpContext != null)
            {
                return SelectUriScheme(uri, httpContext.Request.GetUrlRewriter().Scheme);
            }
            return uri;
        }

        public static Uri SelectUriScheme(Uri uri, string scheme)
        {
            if (!string.IsNullOrEmpty(scheme) && !scheme.Equals(uri.Scheme, StringComparison.OrdinalIgnoreCase))
            {
                //Switch
                var builder = new UriBuilder(uri) { Scheme = scheme.ToLowerInvariant(), Port = scheme.Equals("https", StringComparison.OrdinalIgnoreCase) ? 443 : 80 };//Set proper port!
                return builder.Uri;
            }
            return uri;
        }

        public static Uri ToCurrentScheme(this Uri uri, HttpContext httpContext)
        {
            return SelectCurrentUriScheme(httpContext, uri);
        }

        public static Uri ToScheme(this Uri uri, string scheme)
        {
            return SelectUriScheme(uri, scheme);
        }
    }
}