using BPA.Message;
using BPA.Helper;

using BPA.Communication;
using Microsoft.Extensions.Configuration;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BPASmartClient.Business
{
    /// <summary>
    /// 消息处理接口
    /// </summary>
    public delegate void RecivedHandle(IMessage message);
    /// <summary>
    /// MQTT 管理类
    /// </summary>
    public class MQTTMgr : IPlugin
    {
        //客户端ID
        private int clientId;
        //运行标识
        private bool running = false;
        //消息缓存
        private ConcurrentQueue<string> msg = new ConcurrentQueue<string>();
        //MQTT 代理
        private MqttHelper mqttProxy = new MqttHelper();

        //消息处理者
        private List<RecivedHandle> messageRecives = new List<RecivedHandle>();

        public void Initialize()
        {

        }

        public void Start()
        {
            running = true;
            //主题初始化
            TopicDefine.GetInstance().Initialize(Plugin.GetInstance().GetPlugin<DeviceMgr>().GetDevices());

            mqttProxy.ConnectOk = () =>
            {
                mqttProxy.Subscrib(TopicDefine.GetInstance().SubscribTopics.ToArray());
            };

            //MQTT 数据接收
            mqttProxy.MessageRecive = s => { msg.Enqueue(s); };

            var MqttServerConfig = Plugin.GetInstance().GetPlugin<ConfigMgr>().MQTT_Config;
            var MqttServerAccount = Plugin.GetInstance().GetPlugin<ConfigMgr>().Mqtt_Account;
            var deviceConfig = Plugin.GetInstance().GetPlugin<ConfigMgr>().deviceConfigModelJsons;
            string deviceId = deviceConfig[0].deviceModels[0].DeviceId;
            clientId = Plugin.GetInstance().GetPlugin<ConfigMgr>().ClientId;
            //MQTT 初始化
            mqttProxy.Connect(new BPA.Communication.Base.ConfigurationOptions()
            {
                UserName = MqttServerAccount.UserName,
                Password = MqttServerAccount.Password,
                IpAddress = MqttServerConfig.Host,
                Port = MqttServerConfig.Port,
                ClientId = $"ClientId-[{clientId}]-DeviceId-[{deviceId}]-{Guid.NewGuid()}"
            });

            ThreadManage.GetInstance().Start(() =>
            {
                while (running)
                {
                    while (msg.Count > 0 && msg.TryDequeue(out string temp))
                    {
                        if (0 == clientId)
                            clientId = Plugin.GetInstance().GetPlugin<ConfigMgr>().ClientId;
                        var package = BPAPackage.Deserialize(temp);
                        if (package?.ClientId == clientId)
                        {
                            if (package.Message != null)
                            {
                                for (int i = messageRecives.Count - 1; i >= 0; i--)
                                {
                                    messageRecives[i]?.Invoke(package.Message);
                                }
                            }
                        }
                    }
                    Thread.Sleep(50);
                }
            }, "MQTT 消息处理", isRestart: true);
        }

        /// <summary>
        /// MQTT消息推送
        /// </summary>
        /// <param name="topic">主题</param>
        /// <param name="message">消息体</param>
        public void Publish(string topic, string message)
        {
            mqttProxy.Publish(topic, message);
        }

        /// <summary>
        /// 设置消息处理者
        /// </summary>
        /// <param name="messageRecive">消息处理者</param>
        public void SetMessageReciveHandler(RecivedHandle messageRecive)
        {
            if (messageRecives.Contains(messageRecive))
                return;
            messageRecives.Add(messageRecive);
        }

        public void Dispose()
        {
            running = false;
            mqttProxy.Dispose();
            messageRecives.Clear();
        }


    }
}