/*
 *
 * (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.Collections.Generic;
using System.Linq;

using ASC.Common;
using ASC.Common.Logging;
using ASC.MessagingSystem.DbSender;

using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Options;

namespace ASC.MessagingSystem
{
    public class MessageService
    {
        private readonly ILog log;
        private readonly IMessageSender sender;
        private readonly HttpRequest request;

        private MessageFactory MessageFactory { get; }
        private MessagePolicy MessagePolicy { get; }

        public MessageService(
            IConfiguration configuration,
            IHttpContextAccessor httpContextAccessor,
            MessageFactory messageFactory,
            DbMessageSender sender,
            MessagePolicy messagePolicy,
            IOptionsMonitor<ILog> options)
        {
            if (configuration["messaging:enabled"] != "true")
            {
                return;
            }

            this.sender = sender;
            MessagePolicy = messagePolicy;
            request = httpContextAccessor?.HttpContext?.Request;
            MessageFactory = messageFactory;
            log = options.CurrentValue;
        }

        #region HttpRequest

        public void Send(MessageAction action)
        {
            SendRequestMessage(null, action, null);
        }

        public void Send(MessageAction action, string d1)
        {
            SendRequestMessage(null, action, null, d1);
        }

        public void Send(MessageAction action, string d1, string d2)
        {
            SendRequestMessage(null, action, null, d1, d2);
        }

        public void Send(MessageAction action, string d1, string d2, string d3)
        {
            SendRequestMessage(null, action, null, d1, d2, d3);
        }

        public void Send(MessageAction action, string d1, string d2, string d3, string d4)
        {
            SendRequestMessage(null, action, null, d1, d2, d3, d4);
        }

        public void Send(MessageAction action, IEnumerable<string> d1, string d2)
        {
            SendRequestMessage(null, action, null, string.Join(", ", d1), d2);
        }

        public void Send(MessageAction action, string d1, IEnumerable<string> d2)
        {
            SendRequestMessage(null, action, null, d1, string.Join(", ", d2));
        }

        public void Send(MessageAction action, string d1, string d2, IEnumerable<string> d3)
        {
            SendRequestMessage(null, action, null, d1, d2, string.Join(", ", d3));
        }

        public void Send(MessageAction action, IEnumerable<string> d1)
        {
            SendRequestMessage(null, action, null, string.Join(", ", d1));
        }

        public void Send(string loginName, MessageAction action)
        {
            SendRequestMessage(loginName, action, null);
        }

        public void Send(string loginName, MessageAction action, string d1)
        {
            SendRequestMessage(loginName, action, null, d1);
        }

        #endregion

        #region HttpRequest & Target

        public void Send(MessageAction action, MessageTarget target)
        {
            SendRequestMessage(null, action, target);
        }

        public void Send(MessageAction action, MessageTarget target, string d1)
        {
            SendRequestMessage(null, action, target, d1);
        }

        public void Send(MessageAction action, MessageTarget target, string d1, string d2)
        {
            SendRequestMessage(null, action, target, d1, d2);
        }

        public void Send(MessageAction action, MessageTarget target, string d1, string d2, string d3)
        {
            SendRequestMessage(null, action, target, d1, d2, d3);
        }

        public void Send(MessageAction action, MessageTarget target, string d1, string d2, string d3, string d4)
        {
            SendRequestMessage(null, action, target, d1, d2, d3, d4);
        }

        public void Send(MessageAction action, MessageTarget target, IEnumerable<string> d1, string d2)
        {
            SendRequestMessage(null, action, target, string.Join(", ", d1), d2);
        }

        public void Send(MessageAction action, MessageTarget target, string d1, IEnumerable<string> d2)
        {
            SendRequestMessage(null, action, target, d1, string.Join(", ", d2));
        }

        public void Send(MessageAction action, MessageTarget target, string d1, string d2, IEnumerable<string> d3)
        {
            SendRequestMessage(null, action, target, d1, d2, string.Join(", ", d3));
        }

        public void Send(MessageAction action, MessageTarget target, IEnumerable<string> d1)
        {
            SendRequestMessage(null, action, target, string.Join(", ", d1));
        }

        public void Send(string loginName, MessageAction action, MessageTarget target)
        {
            SendRequestMessage(loginName, action, target);
        }

        public void Send(string loginName, MessageAction action, MessageTarget target, string d1)
        {
            SendRequestMessage(loginName, action, target, d1);
        }

        #endregion

        private void SendRequestMessage(string loginName, MessageAction action, MessageTarget target, params string[] description)
        {
            if (sender == null) return;

            if (request == null)
            {
                log.Debug(string.Format("Empty Http Request for \"{0}\" type of event", action));
                return;
            }

            var message = MessageFactory.Create(request, loginName, action, target, description);
            if (!MessagePolicy.Check(message)) return;

            sender.Send(message);
        }

        #region HttpHeaders

        public void Send(MessageUserData userData, Dictionary<string, string> httpHeaders, MessageAction action)
        {
            SendHeadersMessage(userData, httpHeaders, action, null);
        }

        public void Send(Dictionary<string, string> httpHeaders, MessageAction action)
        {
            SendHeadersMessage(null, httpHeaders, action, null);
        }

        public void Send(Dictionary<string, string> httpHeaders, MessageAction action, string d1)
        {
            SendHeadersMessage(null, httpHeaders, action, null, d1);
        }

        public void Send(Dictionary<string, string> httpHeaders, MessageAction action, IEnumerable<string> d1)
        {
            SendHeadersMessage(null, httpHeaders, action, null, d1?.ToArray());
        }

        public void Send(MessageUserData userData, Dictionary<string, string> httpHeaders, MessageAction action, MessageTarget target)
        {
            SendHeadersMessage(userData, httpHeaders, action, target);
        }

        #endregion

        #region HttpHeaders & Target

        public void Send(Dictionary<string, string> httpHeaders, MessageAction action, MessageTarget target)
        {
            SendHeadersMessage(null, httpHeaders, action, target);
        }

        public void Send(Dictionary<string, string> httpHeaders, MessageAction action, MessageTarget target, string d1)
        {
            SendHeadersMessage(null, httpHeaders, action, target, d1);
        }

        public void Send(Dictionary<string, string> httpHeaders, MessageAction action, MessageTarget target, IEnumerable<string> d1)
        {
            SendHeadersMessage(null, httpHeaders, action, target, d1?.ToArray());
        }

        #endregion

        private void SendHeadersMessage(MessageUserData userData, Dictionary<string, string> httpHeaders, MessageAction action, MessageTarget target, params string[] description)
        {
            if (sender == null) return;

            var message = MessageFactory.Create(userData, httpHeaders, action, target, description);
            if (!MessagePolicy.Check(message)) return;

            sender.Send(message);
        }

        #region Initiator

        public void Send(MessageInitiator initiator, MessageAction action, params string[] description)
        {
            SendInitiatorMessage(initiator.ToString(), action, null, description);
        }

        #endregion

        #region Initiator & Target

        public void Send(MessageInitiator initiator, MessageAction action, MessageTarget target, params string[] description)
        {
            SendInitiatorMessage(initiator.ToString(), action, target, description);
        }

        #endregion

        private void SendInitiatorMessage(string initiator, MessageAction action, MessageTarget target, params string[] description)
        {
            if (sender == null) return;

            var message = MessageFactory.Create(request, initiator, action, target, description);
            if (!MessagePolicy.Check(message)) return;

            sender.Send(message);
        }
    }

    public static class MessageServiceExtension
    {
        public static DIHelper AddMessageServiceService(this DIHelper services)
        {
            services.TryAddScoped<MessageService>();

            return services
                .AddMessagePolicyService()
                .AddDbMessageSenderService()
                .AddMessageFactoryService();
        }
    }
}