using MQTTnet.Client;
using Prism.Events;
using Prism.Regions;
using RIZO_Application.Core;
using RIZO_Application.Core.Mvvm;
using RIZO_Application.Infrastructure.Model;
using RIZO_Helper.Tools;

namespace RIZO_Application.Modules.Base.ViewModels
{
    public class MqttControlViewModel : RegionViewModelBase
    {
        private readonly IEventAggregator _eventAggregator;
        private MqttHelper? _mqttHepler;
        private SubscriptionToken _token;
        public MqttControlViewModel(
            IRegionManager regionManager,
            IEventAggregator eventAggregator) 
            : base(regionManager)
        {
            _eventAggregator = eventAggregator;
            _token = _eventAggregator.GetEvent<ScanEvent>().Subscribe(OnScanEventReceived, ThreadOption.UIThread, true);
            Task.Run(Mqtt);
        }

        public async Task Mqtt()
        {
            string serverUrl = "noConfig";
            string clientId = "noConfig";
            if (MqttConfigs.Current != null)
            {
                serverUrl = MqttConfigs.Current.ServerUrl ?? string.Empty;
                clientId = MqttConfigs.Current.ClientId ?? string.Empty;
            }
            _eventAggregator.GetEvent<SystemLogEvent>().Publish($"Mqtt初始化……");
            _mqttHepler = new MqttHelper(serverUrl, 1883, clientId);
            _mqttHepler.MessageReceived += HandleMqttMessage;
            await _mqttHepler.ConnectAsync();
            await _mqttHepler.SubscribeAsync($"shgg_mes/print/{clientId}");
            await _mqttHepler.PublishAsync($"shgg_mes/connect/{clientId}","已连接");
            // await _mqttHepler.SubscribeAsync("shgg_mes/backEnd/SiteComLabelCode");
            _eventAggregator.GetEvent<SystemLogEvent>().Publish($"Mqtt初始化完成");
        }
        // 定义事件处理方法
        public void HandleMqttMessage(object sender, MqttApplicationMessageReceivedEventArgs e)
        {
            // 获取消息的主题
            string topic = e.ApplicationMessage.Topic;
            // 获取消息的负载并转换为字符串
            string payload = System.Text.Encoding.UTF8.GetString(e.ApplicationMessage.Payload);
            // 打印接收到的消息信息
            _eventAggregator.GetEvent<SystemLogEvent>().Publish($"收到信息'{topic}': {payload}");
            // 控制打印
            PrintDto printMessage = new()
            {
                Path = "/",
                Name = "需要测试打印",
                Description = "123"
            };
            _eventAggregator.GetEvent<PrintEvent>().Publish(printMessage);
        }
         private async void OnScanEventReceived(string message)
        {
            if(_mqttHepler != null)
            {
                //TODO JSON重新构造发送信息

                await _mqttHepler.PublishAsync($"shgg_mes/backEnd/SiteComLabelCode", message);
            }
        }

        public void Destroy()
        {
            _token?.Dispose();
        }
    }
}