using Microsoft.Extensions.Options;
using MQTTnet.Protocol;
using MQTTnet.Server;
using System.Text;

namespace HTEX.Complex.Services.MQTT
{
    public class MQTTEvents
    {
        
        public MQTTEvents()
        {
            

        }

        /// <summary>
        /// 客户端订阅主题事件
        /// </summary>
        /// <param name="arg"></param>
        /// <returns></returns>
        public Task _mqttServer_ClientSubscribedTopicAsync(ClientSubscribedTopicEventArgs arg)
        {
            Console.WriteLine($"ClientSubscribedTopicAsync：客户端ID=【{arg.ClientId}】订阅的主题=【{arg.TopicFilter}】 ");
            return Task.CompletedTask;
        }

        /// <summary>
        /// 关闭后事件
        /// </summary>
        /// <param name="arg"></param>
        /// <returns></returns>
        public Task _mqttServer_StoppedAsync(EventArgs arg)
        {
            Console.WriteLine($"StoppedAsync：MQTT服务已关闭……");
            return Task.CompletedTask;
        }

        /// <summary>
        /// 用户名和密码验证有关
        /// </summary>
        /// <param name="arg"></param>
        /// <returns></returns>
        public Task _mqttServer_ValidatingConnectionAsync(ValidatingConnectionEventArgs arg)
        {
            arg.ReasonCode = MqttConnectReasonCode.Success;
            //if ((arg.UserName ?? string.Empty) != _mqttOption.UserName || (arg.Password ?? String.Empty) != _mqttOption.Password)
            //{
            //    arg.ReasonCode = MqttConnectReasonCode.Banned;
            //    Console.WriteLine($"ValidatingConnectionAsync：客户端ID=【{arg.ClientId}】用户名或密码验证错误 ");

            //}
            return Task.CompletedTask;
        }

        /// <summary>
        /// 消息接收事件
        /// </summary>
        /// <param name="arg"></param>
        /// <returns></returns>
        public Task _mqttServer_InterceptingPublishAsync(InterceptingPublishEventArgs arg)
        {
            //if (string.Equals(arg.ClientId,_mqttOption. ServerClientId))
            //{
            //    return Task.CompletedTask;
            //}

            Console.WriteLine($"InterceptingPublishAsync：客户端ID=【{arg.ClientId}】 Topic主题=【{arg.ApplicationMessage.Topic}】 消息=【{Encoding.UTF8.GetString(arg.ApplicationMessage.PayloadSegment)}】 qos等级=【{arg.ApplicationMessage.QualityOfServiceLevel}】");
            return Task.CompletedTask;

        }

        /// <summary>
        /// 启动后事件
        /// </summary>
        /// <param name="arg"></param>
        /// <returns></returns>
        public Task _mqttServer_StartedAsync(EventArgs arg)
        {
            Console.WriteLine($"StartedAsync：MQTT服务已启动……");
            return Task.CompletedTask;
        }

        /// <summary>
        /// 客户端取消订阅事件
        /// </summary>
        /// <param name="arg"></param>
        /// <returns></returns>
        public Task _mqttServer_ClientUnsubscribedTopicAsync(ClientUnsubscribedTopicEventArgs arg)
        {
            Console.WriteLine($"ClientUnsubscribedTopicAsync：客户端ID=【{arg.ClientId}】已取消订阅的主题=【{arg.TopicFilter}】  ");
            return Task.CompletedTask;
        }

        public Task _mqttServer_ApplicationMessageNotConsumedAsync(ApplicationMessageNotConsumedEventArgs arg)
        {
            Console.WriteLine($"ApplicationMessageNotConsumedAsync：发送端ID=【{arg.SenderId}】 Topic主题=【{arg.ApplicationMessage.Topic}】 消息=【{Encoding.UTF8.GetString(arg.ApplicationMessage.PayloadSegment)}】 qos等级=【{arg.ApplicationMessage.QualityOfServiceLevel}】");
            return Task.CompletedTask;

        }

        /// <summary>
        /// 客户端断开时候触发
        /// </summary>
        /// <param name="arg"></param>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>
        public Task _mqttServer_ClientDisconnectedAsync(ClientDisconnectedEventArgs arg)
        {
            Console.WriteLine($"ClientDisconnectedAsync：客户端ID=【{arg.ClientId}】已断开, 地址=【{arg.Endpoint}】  ");
            return Task.CompletedTask;

        }

        /// <summary>
        /// 客户端连接时候触发
        /// </summary>
        /// <param name="arg"></param>
        /// <returns></returns>
        public Task _mqttServer_ClientConnectedAsync(ClientConnectedEventArgs arg)
        {
            Console.WriteLine($"ClientConnectedAsync：客户端ID=【{arg.ClientId}】已连接, 用户名=【{arg.UserName}】地址=【{arg.Endpoint}】  ");
            return Task.CompletedTask;
        }

        //public async Task _mqttServer_InterceptingClientEnqueueAsync(InterceptingClientApplicationMessageEnqueueEventArgs args)
        //{
        //    throw new NotImplementedException();
        //}

        //public async Task _mqttServer_ClientAcknowledgedPublishPacketAsync(ClientAcknowledgedPublishPacketEventArgs args)
        //{
        //    throw new NotImplementedException();
        //}
    }
}