using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using NLog;
using Prism.Events;
using Prism.Regions;
using RIZO_Application.Core;
using RIZO_Application.Core.Mvvm;

namespace RIZO_Application.Modules.Base.ViewModels
{
    public class SystemLogViewModel : RegionViewModelBase
    {
        private readonly IEventAggregator _eventAggregator;
        private SubscriptionToken _token;
        private string _logMessage = "";
        private Logger _logger = LogManager.GetCurrentClassLogger();
        public string LogMessage
        {
            get { return _logMessage; }
            set { SetProperty(ref _logMessage, value); }
        }
        public SystemLogViewModel(
            IRegionManager regionManager,
            IEventAggregator eventAggregator) 
            : base(regionManager)
        {
            OnLogReceived("初始化日志系统");
            _eventAggregator = eventAggregator;
            // 订阅事件，使用UI线程处理，保持强引用
            _token = _eventAggregator.GetEvent<SystemLogEvent>().Subscribe(OnLogReceived, ThreadOption.UIThread, true);
       
        }

        private void OnLogReceived(string message)
        {
            Debug.WriteLine(message);
            LogMessage += $"\n{DateTime.Now}: {message}";
            _logger.Info($"\n{DateTime.Now}: {message}");
        }

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

        public void AddTestLogMessage()
        {
        }
        public override void OnNavigatedTo(NavigationContext navigationContext)
        {
            //do something
        }
    }
}