/*
 *
 * (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 ASC.Notify.Engine;
using ASC.Notify.Patterns;
using ASC.Notify.Recipients;
using Microsoft.Extensions.DependencyInjection;

namespace ASC.Notify.Model
{
    class NotifyClientImpl : INotifyClient
    {
        private readonly Context ctx;
        private readonly InterceptorStorage interceptors = new InterceptorStorage();
        private readonly INotifySource notifySource;
        public IServiceScope ServiceScope { get; }

        public NotifyClientImpl(Context context, INotifySource notifySource, IServiceScope serviceScope)
        {
            this.notifySource = notifySource ?? throw new ArgumentNullException("notifySource");
            ServiceScope = serviceScope;
            ctx = context ?? throw new ArgumentNullException("context");
        }

        public void SendNoticeToAsync(INotifyAction action, IRecipient[] recipients, string[] senderNames, params ITagValue[] args)
        {
            SendNoticeToAsync(action, null, recipients, senderNames, false, args);
        }

        public void SendNoticeToAsync(INotifyAction action, string objectID, IRecipient[] recipients, string[] senderNames, params ITagValue[] args)
        {
            SendNoticeToAsync(action, objectID, recipients, senderNames, false, args);
        }

        public void SendNoticeToAsync(INotifyAction action, string objectID, IRecipient[] recipients, params ITagValue[] args)
        {
            SendNoticeToAsync(action, objectID, recipients, null, false, args);
        }

        public void SendNoticeToAsync(INotifyAction action, string objectID, IRecipient[] recipients, bool checkSubscription, params ITagValue[] args)
        {
            SendNoticeToAsync(action, objectID, recipients, null, checkSubscription, args);
        }

        public void SendNoticeAsync(INotifyAction action, string objectID, IRecipient recipient, params ITagValue[] args)
        {
            SendNoticeToAsync(action, objectID, new[] { recipient }, null, false, args);
        }

        public void SendNoticeAsync(int tenantId, INotifyAction action, string objectID, params ITagValue[] args)
        {
            var subscriptionSource = notifySource.GetSubscriptionProvider();
            var recipients = subscriptionSource.GetRecipients(action, objectID);
            SendNoticeToAsync(action, objectID, recipients, null, false, args);
        }

        public void SendNoticeAsync(INotifyAction action, string objectID, IRecipient recipient, bool checkSubscription, params ITagValue[] args)
        {
            SendNoticeToAsync(action, objectID, new[] { recipient }, null, checkSubscription, args);
        }



        public INotifyClient RegisterSendMethod(Action<DateTime> method, string cron)
        {
            ctx.NotifyEngine.RegisterSendMethod(method, cron);
            return this;
        }

        public INotifyClient UnregisterSendMethod(Action<DateTime> method)
        {
            ctx.NotifyEngine.UnregisterSendMethod(method);
            return this;

        }

        public void BeginSingleRecipientEvent(string name)
        {
            interceptors.Add(new SingleRecipientInterceptor(name));
        }

        public void EndSingleRecipientEvent(string name)
        {
            interceptors.Remove(name);
        }

        public void AddInterceptor(ISendInterceptor interceptor)
        {
            interceptors.Add(interceptor);
        }

        public void RemoveInterceptor(string name)
        {
            interceptors.Remove(name);
        }


        public void SendNoticeToAsync(INotifyAction action, string objectID, IRecipient[] recipients, string[] senderNames, bool checkSubsciption, params ITagValue[] args)
        {
            if (recipients == null) throw new ArgumentNullException("recipients");

            BeginSingleRecipientEvent("__syspreventduplicateinterceptor");

            foreach (var recipient in recipients)
            {
                var r = CreateRequest(action, objectID, recipient, args, senderNames, checkSubsciption);
                SendAsync(r);
            }
        }

        private void SendAsync(NotifyRequest request)
        {
            request.Interceptors = interceptors.GetAll();
            ctx.NotifyEngine.QueueRequest(request, ServiceScope);
        }

        private NotifyRequest CreateRequest(INotifyAction action, string objectID, IRecipient recipient, ITagValue[] args, string[] senders, bool checkSubsciption)
        {
            if (action == null) throw new ArgumentNullException("action");
            if (recipient == null) throw new ArgumentNullException("recipient");

            var request = new NotifyRequest(notifySource, action, objectID, recipient)
            {
                SenderNames = senders,
                IsNeedCheckSubscriptions = checkSubsciption
            };
            if (args != null) request.Arguments.AddRange(args);
            return request;
        }
    }
}