using JiShe.CollectBus.Common;
using JiShe.CollectBus.Common.Enums;
using JiShe.CollectBus.IotSystems.Ammeters;
using JiShe.CollectBus.IotSystems.Devices;
using JiShe.CollectBus.Protocol.Interfaces;
using JiShe.CollectBus.Protocol3761;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using TouchSocket.Core;
using TouchSocket.Sockets;
using Volo.Abp.Caching;
using Volo.Abp.DependencyInjection;
using Volo.Abp.Domain.Repositories;

namespace JiShe.CollectBus.Plugins
{
    public partial class TcpMonitor : PluginBase, ITransientDependency, ITcpReceivedPlugin, ITcpConnectingPlugin, ITcpConnectedPlugin, ITcpClosedPlugin, ITcpClosingPlugin
    {
        private readonly IProducerService _producerService;
        private readonly ILogger<TcpMonitor> _logger;
        private readonly IDistributedCache<AmmeterInfo> _ammeterInfoCache;
        private readonly IServiceProvider _serviceProvider;
        private readonly IProtocolService _protocolService;
        private readonly ServerApplicationOptions _serverApplicationOptions;
        private readonly IFreeRedisProvider _freeRedisProvider;

        /// <summary>
        /// 
        /// </summary>
        /// <param name="producerService"></param>
        /// <param name="logger"></param>
        /// <param name="ammeterInfoCache"></param>
        /// <param name="serviceProvider"></param>
        /// <param name="serverApplicationOptions"></param>
        /// <param name="protocolService"></param>
        /// <param name="freeRedisProvider"></param>
        public TcpMonitor(IProducerService producerService,
            ILogger<TcpMonitor> logger,
            IDistributedCache<AmmeterInfo> ammeterInfoCache,
            IServiceProvider serviceProvider,
            IOptions<ServerApplicationOptions> serverApplicationOptions,
            IProtocolService protocolService,
            IFreeRedisProvider freeRedisProvider)
        {
            _producerService = producerService;
            _logger = logger;
            _ammeterInfoCache = ammeterInfoCache;
            _serviceProvider= serviceProvider;
            _protocolService = protocolService;
            _serverApplicationOptions = serverApplicationOptions.Value;
            _freeRedisProvider = freeRedisProvider;
        }

        public async Task OnTcpReceived(ITcpSession client, ReceivedDataEventArgs e)
        {
            if (string.IsNullOrWhiteSpace(_serverApplicationOptions.DefaultProtocolPlugin))
            {
                _logger.LogError($"请配置默认的端到云协议插件！");
            }
            var messageHexString = Convert.ToHexString(e.ByteBlock.Span);
            var protocolPlugin = await _protocolService.GetProtocolServiceAsync(_serverApplicationOptions.DefaultProtocolPlugin);
            if (protocolPlugin == null)
            {
                _logger.LogError($"默认的端到云协议插件{_serverApplicationOptions.DefaultProtocolPlugin}不存在！");
            }
            var tcpSessionClient = (ITcpSessionClient)client;
            
            TB3761? tB3761 = await protocolPlugin!.AnalyzeAsync<TB3761>(tcpSessionClient, messageHexString);
            if (tB3761 == null)
            {
                // TODO: 暂时不处理，后续再处理
                _logger.LogError($"指令初步解析失败，指令内容：{messageHexString}");
            }

            //登录和心跳的时候，需要过滤TCP连接
            if (tB3761.DT?.Fn == (int)FN.登录 || tB3761.DT?.Fn == (int)FN.心跳)
            {
                string focusAddress = tB3761.A.Code;
                if (string.IsNullOrWhiteSpace(focusAddress))//集中器地址为空，主动关闭连接
                {
                    await tcpSessionClient.CloseAsync();
                    _logger.LogError($"指令解析失败,没有找到集中器地址，指令内容：{messageHexString}");
                    return;
                }

                //查找Redis缓存的集中器信息
                var focusCacheInfos = _freeRedisProvider.Instance.HGet<FocusCacheInfos>(RedisConst.CacheAllFocusInfoHashKey, focusAddress);
                if (focusCacheInfos == null)
                {
                    await tcpSessionClient.CloseAsync();
                    _logger.LogError($"TCP连接关闭，没有找到集中器地址{focusAddress}的缓存信息");
                    return;
                }

                //检查集中器的信息的服务器标记是否为空，如果不为空，需要检查是否与当前服务器的标记一致
                if (!string.IsNullOrWhiteSpace(focusCacheInfos.ServerTagName) && focusCacheInfos.ServerTagName != _serverApplicationOptions.ServerTagName)
                {
                    await tcpSessionClient.CloseAsync();
                    _logger.LogError($"TCP连接关闭，集中器地址{focusAddress}的服务器标记为：{focusCacheInfos.ServerTagName}，当前服务器的标记为：{_serverApplicationOptions.ServerTagName}，不一致拒绝连接。");
                    return;
                }

                int currentTCPConnectionCount = tcpSessionClient.Service.Count;
                int configTCPConnectionCount = _serverApplicationOptions.TCPConnectionCount;//配置TCP连接数量

                _logger.LogWarning($"当前配置连接数量为：{configTCPConnectionCount}，当前连接数量为：{currentTCPConnectionCount}");

                if (currentTCPConnectionCount >= configTCPConnectionCount)
                {
                    _logger.LogError($"当前连接数量为：{currentTCPConnectionCount}，大于配置连接数量{configTCPConnectionCount}，将拒绝集中{focusAddress}连接");
                    await tcpSessionClient.CloseAsync();
                    return;
                }

                //缓存更新状态
                focusCacheInfos.LastSurvivalTime = DateTime.Now;
                focusCacheInfos.ServerTagName = _serverApplicationOptions.ServerTagName;
                focusCacheInfos.OnLineStatus = true;

                _freeRedisProvider.Instance.HSet<FocusCacheInfos>(RedisConst.CacheAllFocusInfoHashKey, focusAddress, focusCacheInfos);

                //连接成功以后，通知信息到后台
                Dictionary<ServiceCommunicationTypeEnum, string> channelMessage = new Dictionary<ServiceCommunicationTypeEnum, string>();
                channelMessage.Add(ServiceCommunicationTypeEnum.FocusStatusReceived, focusCacheInfos.Serialize());
                _= _producerService.ProduceAsync(KafkaTopicConsts.ServiceCommunicationChannelTopic, channelMessage);
            }

            //todo 后续可以考虑Redis的bitmap做日活签到。

            // TODO：要注意保存树模型的时时标字段，如果没有时标,则取接受时间做兼容
            await e.InvokeNext();
        }

       
        public async Task OnTcpConnecting(ITcpSession client, ConnectingEventArgs e)
        {
            var tcpSessionClient = (ITcpSessionClient)client;
            
            _logger.LogInformation($"[TCP] ID:{tcpSessionClient.Id} IP:{client.GetIPPort()}正在连接中...");
            await e.InvokeNext();
        }

        public async Task OnTcpConnected(ITcpSession client, ConnectedEventArgs e)
        {
            var tcpSessionClient = (ITcpSessionClient)client;


            _logger.LogInformation($"[TCP] ID:{tcpSessionClient.Id} IP:{client.GetIPPort()}已连接");
            await e.InvokeNext();
        }

        public async Task OnTcpClosed(ITcpSession client, ClosedEventArgs e)
        { 
            var tcpSessionClient = (ITcpSessionClient)client; 
            _logger.LogWarning($"[TCP] ID:{tcpSessionClient.Id} IP:{client.GetIPPort()}已关闭连接");

            //查找Redis缓存的集中器信息
            var focusCacheInfos = _freeRedisProvider.Instance.HGet<FocusCacheInfos>(RedisConst.CacheAllFocusInfoHashKey, tcpSessionClient.Id);
            if (focusCacheInfos != null)
            {

                //缓存更新状态
                focusCacheInfos.LastSurvivalTime = DateTime.Now;
                focusCacheInfos.ServerTagName = _serverApplicationOptions.ServerTagName;
                focusCacheInfos.OnLineStatus = false;

                _freeRedisProvider.Instance.HSet<FocusCacheInfos>(RedisConst.CacheAllFocusInfoHashKey, tcpSessionClient.Id, focusCacheInfos);
            }

            await e.InvokeNext();
        }

        public Task OnTcpClosing(ITcpSession client, ClosingEventArgs e)
        {
            var tcpSessionClient = (ITcpSessionClient)client;
            _logger.LogWarning($"[TCP] ID:{tcpSessionClient.Id} IP:{client.GetIPPort()}终端主动关闭");
           return Task.CompletedTask;
        }
    }
}