using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.ServiceModel;
using Aitex.Core.Account;
using Aitex.Core.RT.DataCenter;
using Aitex.Core.RT.Log;
using Aitex.Core.RT.OperationCenter;
using Aitex.Core.Util;
using Aitex.Core.WCF;
using MECF.Framework.Common.Equipment;
using MECF.Framework.Common.Event;
using MECF.Framework.Common.FAServices;

namespace Aitex.Core.RT.Event
{
	public class EventManager : ICommonEvent
	{
        #region Variable

        private const string INFORMATION_EVENT = "INFORMATION_EVENT";

        private const string WARNING_EVENT = "WARNING_EVENT";

        private const string ALARM_EVENT = "ALARM_EVENT";

        public event Action<EventItem> FireEvent;

        public event Action<EventItem> OnAlarmEvent;

        public event Action<EventItem> OnEvent;

        private FixSizeQueue<EventItem> _eventQueue;

		private FixSizeQueue<EventItem> _alarmQueue;

		private PeriodicJob _eventJob;

		private EventDBWriter _eventDb;

		private EventLogWriter _writerToLog;

		private EventMailWriter _writerToMail;

		private EventService _eventService;

		private ServiceHost _eventServiceHost;

		/// <summary>
		/// 系统支持的事件类型。
		/// </summary>
		private readonly Dictionary<string, EventItem> _dictEvTypeSource = new();

		private List<AlarmEventItem> _alarms;

		#endregion

        #region Properties

		public EventService Service => _eventService;

		public List<VIDItem> VidEventList
		{
			get
			{
				var list = new List<VIDItem>();
				foreach (var item in _dictEvTypeSource)
				{
					list.Add(new VIDItem
					{
						DataType = "",
						Description = item.Value.Description,
						Index = 0,
						Name = item.Key,
						Unit = ""
					});
				}
				return list;
			}
		}

		public List<VIDItem> VidAlarmList
		{
			get
			{
				var list = new List<VIDItem>();
				foreach (var alarm in _alarms)
				{
					list.Add(new VIDItem
					{
						DataType = "",
						Description = alarm.Description,
						Index = 0,
						Name = alarm.EventEnum,
						Unit = ""
					});
				}
				return list;
			}
		}

		#endregion

        #region Methods

		public void Initialize(string commonEventListXmlFile, bool needCreateService = true, bool needSaveDb = true, bool needMailOut = false, string localEventListXmlFile = null)
		{
			InitData();
            InitOp();

			if (needSaveDb)
			{
				_eventDb = new EventDBWriter();
				try
				{
					_eventDb.Initialize();
				}
				catch (Exception ex)
				{
					LOG.Write(ex);
				}
			}
			_writerToLog = new EventLogWriter();
			if (needMailOut)
			{
				_writerToMail = new EventMailWriter();
			}
			_eventService = new EventService();
			if (needCreateService)
			{
				try
				{
					_eventServiceHost = new ServiceHost(_eventService);
					_eventServiceHost.Open();
				}
				catch (Exception ex2)
				{
					throw new ApplicationException("创建Event服务失败，" + ex2.Message);
				}
			}
			_eventQueue = new FixSizeQueue<EventItem>(1000);
			_alarmQueue = new FixSizeQueue<EventItem>(1000);
			_alarms = new List<AlarmEventItem>(1000);
			_eventJob = new PeriodicJob(100, PeriodicRun, "EventPeriodicJob", isStartNow: true);
			try
			{
				var eventDefine = CustomXmlSerializer.Deserialize<EventDefine>(new FileInfo(commonEventListXmlFile));
				foreach (var item in eventDefine.Types)
				{
					_dictEvTypeSource[item.EventEnum] = item;
				}
			}
			catch (ArgumentNullException)
			{
				throw new ApplicationException("初始化EventManager没有设置Event列表文件");
			}
			catch (FileNotFoundException ex4)
			{
				throw new ApplicationException("没有找到Event列表文件，" + ex4.Message);
			}
			catch (Exception ex5)
			{
				throw new ApplicationException("EventDefine文件格式不对，" + commonEventListXmlFile + ",\r\n" + ex5.Message);
			}
			try
			{
				if (!string.IsNullOrEmpty(localEventListXmlFile))
				{
					var eventDefine2 = CustomXmlSerializer.Deserialize<EventDefine>(new FileInfo(localEventListXmlFile));
					foreach (var item2 in eventDefine2.Types)
					{
						_dictEvTypeSource[item2.EventEnum] = item2;
					}
				}
			}
			catch (ArgumentNullException)
			{
				throw new ApplicationException("初始化EventManager没有设置Event列表文件");
			}
			catch (FileNotFoundException ex)
			{
				throw new ApplicationException("没有找到Event列表文件，" + ex.Message);
			}
			catch (Exception ex)
			{
				throw new ApplicationException("EventDefine文件格式不对，" + localEventListXmlFile + ",\r\n" + ex.Message);
			}

			Subscribe(new EventItem(INFORMATION_EVENT, EventType.EventUI_Notify, EventLevel.Information));
			Subscribe(new EventItem(WARNING_EVENT, EventType.EventUI_Notify, EventLevel.Warning));
			Subscribe(new EventItem(ALARM_EVENT, EventType.EventUI_Notify, EventLevel.Alarm));
			EV.InnerEventManager = this;
		}

		private void InitData()
		{
            DATA.Subscribe("System.LiveAlarmEvent", GetAlarmEvent);

            DATA.Subscribe("System.ActiveAlarm", () => _alarmQueue.ToList().FindAll(x => !x.IsAcknowledged));
			DATA.Subscribe("System.HasActiveAlarm", () => _alarmQueue.ToList().Any(x => !x.IsAcknowledged));
			
            DATA.Subscribe("System.HasActiveAlarmEvent", () => _alarmQueue.ToList().Any(x => x.Level == EventLevel.Alarm && !x.IsAcknowledged));
            DATA.Subscribe("System.HasAckedAlarmEvent", () => _alarmQueue.ToList().Any(x => x.Level == EventLevel.Alarm && x.IsAcknowledged));
            DATA.Subscribe("System.HasActiveWarningEvent", () => _alarmQueue.ToList().Any(x => x.Level == EventLevel.Warning && !x.IsAcknowledged));
            DATA.Subscribe("System.HasAckedWarningEvent", () => _alarmQueue.ToList().Any(x => x.Level == EventLevel.Warning && x.IsAcknowledged));
        }

        private void InitOp()
        {
            OP.Subscribe("System.AckAllAlarms", InvokeAckAllAlarms);
            OP.Subscribe("System.ResetAlarm", InvokeResetAlarm);

            #region 以下为用于测试Event的操作

            OP.Subscribe("System.Diagnosis.GenWarningEvent", (s, args) =>
            {
				PostWarningLog(ModuleName.System.ToString(), args[0].ToString());
                return true;
            });

            OP.Subscribe("System.Diagnosis.GenAlarmEvent", (s, args) =>
            {
                PostAlarmLog(ModuleName.System.ToString(), args[0].ToString());
                return true;
            });

            OP.Subscribe("System.Diagnosis.GenPjDoneEvent", (s, args) =>
            {
                //WriteEvent(ModuleName.System.ToString(), "PJ_DONE", "LoadLock", "0");
                //EV.PostMessage(ModuleName.System.ToString(), EventEnum.PJ_DONE, "LoadLock", "0");
				OP.DoOperation("System.AlertJobDone", ModuleName.LoadLock, 0);
                return true;
            });
            
            #endregion
        }

		/// <summary>
		/// 响应所有报警事件。
		/// </summary>
		/// <returns></returns>
        private bool InvokeAckAllAlarms(string arg1, object[] arg2)
        {
            AckAlarmEvents();
            return true;
        }

		/// <summary>
		/// 复位指定的Alarm。
		/// <remarks>
		/// 请参考UI.Client库中的ModuleAlarmViewModel对象。
		/// <br/>
		/// 在此视图中，可以复位单条Alarm.
		/// </remarks>
		/// </summary>
		/// <param name="arg1"></param>
		/// <param name="arg2"></param>
		/// <returns></returns>
		private bool InvokeResetAlarm(string arg1, object[] arg2)
		{
			ClearAlarmEvent();
			if (arg2 != null && arg2.Length >= 2)
			{
				_alarms.FirstOrDefault(x => x.Source == (string)arg2[0] && x.EventEnum == (string)arg2[1])?.Reset();
			}
			return true;
		}

		/// <summary>
		/// 终止事件管理器。
		/// </summary>
		public void Terminate()
		{
			if (_eventJob != null)
			{
				_eventJob.Stop();
				_eventJob = null;
			}
			if (_eventServiceHost != null)
			{
				_eventServiceHost.Close();
				_eventServiceHost = null;
			}
		}

        /// <summary>
        /// 创建指定的事件并将其写入列队。
        /// </summary>
        /// <param name="eventName">事件名称。</param>
        public void WriteEvent(string eventName)
		{
			if (!_dictEvTypeSource.ContainsKey(eventName))
			{
				LOG.Write("Event name not registered, " + eventName);
			}
			else
			{
				WriteEvent(_dictEvTypeSource[eventName].Source, eventName);
			}
		}

        /// <summary>
        /// 创建指定的事件并将其写入列队。
        /// </summary>
        /// <param name="module">事件所属模组名称。</param>
        /// <param name="eventName">事件名称。</param>
        /// <param name="message">事件消息。</param>
        public void WriteEvent(string module, string eventName, string message)
		{
			if (!_dictEvTypeSource.ContainsKey(eventName))
			{
				LOG.Write("Event name not registered, " + eventName);
				return;
			}
			var eventItem = _dictEvTypeSource[eventName].Clone();
			eventItem.Source = module;
			eventItem.Description = message;
			eventItem.OccuringTime = DateTime.Now;
			_eventQueue.Enqueue(eventItem);
			if (eventItem.Level == EventLevel.Alarm || eventItem.Level == EventLevel.Warning)
			{
				_alarmQueue.Enqueue(eventItem);
                OnAlarmEvent?.Invoke(eventItem);

            }

            OnEvent?.Invoke(eventItem);
            _writerToLog.WriteEvent(eventItem);
		}

        /// <summary>
        /// 创建指定的事件并将其写入列队。
        /// </summary>
        /// <param name="eventName">事件名称。</param>
        /// <param name="dvid"></param>
        public void WriteEvent(string eventName, SerializableDictionary<string, string> dvid)
		{
			if (!_dictEvTypeSource.ContainsKey(eventName))
			{
				LOG.Write("Event name not registered, " + eventName);
			}
			else
			{
				WriteEvent(_dictEvTypeSource[eventName].Source, eventName, dvid);
			}
		}

		public void WriteEvent(string eventName, SerializableDictionary<string, object> dvid)
		{
			if (!_dictEvTypeSource.ContainsKey(eventName))
			{
				LOG.Error("Event name not registered, " + eventName);
				return;
			}
			var eventItem = _dictEvTypeSource[eventName].Clone(dvid);
			eventItem.OccuringTime = DateTime.Now;
			ProceedReceivedEvent(eventItem);
		}

		public void WriteEvent(string module, string eventName, params object[] args)
		{
			var eventItem = _dictEvTypeSource[eventName].Clone();
			eventItem.Source = module;
			if (_dictEvTypeSource[eventName].Description == null)
			{
				return;
			}
			eventItem.Description = string.Format(_dictEvTypeSource[eventName].Description, args);
			if (!string.IsNullOrEmpty(_dictEvTypeSource[eventName].GlobalDescription_en))
			{
				eventItem.GlobalDescription_en = string.Format(_dictEvTypeSource[eventName].GlobalDescription_en, args);
			}
			if (!string.IsNullOrEmpty(_dictEvTypeSource[eventName].GlobalDescription_zh))
			{
				eventItem.GlobalDescription_zh = string.Format(_dictEvTypeSource[eventName].GlobalDescription_zh, args);
			}
			eventItem.OccuringTime = DateTime.Now;
			_eventQueue.Enqueue(eventItem);
			if (eventItem.Level == EventLevel.Alarm || eventItem.Level == EventLevel.Warning)
			{
				_alarmQueue.Enqueue(eventItem);
                OnAlarmEvent?.Invoke(eventItem);
            }

            OnEvent?.Invoke(eventItem);
            _writerToLog.WriteEvent(eventItem);
		}

		public void WriteEvent(string module, string eventName, SerializableDictionary<string, string> dvid, params object[] args)
		{
			var eventItem = _dictEvTypeSource[eventName].Clone();
			eventItem.Source = module;
			eventItem.Description = string.Format(_dictEvTypeSource[eventName].Description, args);
			if (!string.IsNullOrEmpty(_dictEvTypeSource[eventName].GlobalDescription_en))
			{
				eventItem.GlobalDescription_en = string.Format(_dictEvTypeSource[eventName].GlobalDescription_en, args);
			}
			if (!string.IsNullOrEmpty(_dictEvTypeSource[eventName].GlobalDescription_zh))
			{
				eventItem.GlobalDescription_zh = string.Format(_dictEvTypeSource[eventName].GlobalDescription_zh, args);
			}
			eventItem.OccuringTime = DateTime.Now;
			eventItem.DVID = dvid;
			_eventQueue.Enqueue(eventItem);
			if (eventItem.Level == EventLevel.Alarm || eventItem.Level == EventLevel.Warning)
			{
				_alarmQueue.Enqueue(eventItem);
                OnAlarmEvent?.Invoke(eventItem);
            }

            OnEvent?.Invoke(eventItem);
            _writerToLog.WriteEvent(eventItem);
		}

		private void ProceedReceivedEvent(EventItem item)
		{
			_eventQueue.Enqueue(item);
			if (item.Level == EventLevel.Alarm || item.Level == EventLevel.Warning)
			{
				_alarmQueue.Enqueue(item);
                OnAlarmEvent?.Invoke(item);
            }

            OnEvent?.Invoke(item);
            _writerToLog.WriteEvent(item);
		}

		public void PostNotificationMessage(string message)
		{
			var eventItem = new EventItem
			{
				Type = EventType.UIMessage_Notify,
				Description = message,
				OccuringTime = DateTime.Now
			};
			_eventQueue.Enqueue(eventItem);
			_writerToLog.WriteEvent(eventItem);
		}

		public void PostPopDialogMessage(EventLevel level, string title, string message)
		{
			var eventItem = new EventItem
			{
				Type = EventType.Dialog_Nofity,
				Description = title,
				Explaination = message,
				OccuringTime = DateTime.Now,
				Level = level
			};
			_eventQueue.Enqueue(eventItem);
			_writerToLog.WriteEvent(eventItem);
		}

		public void PostKickoutMessage(string message)
		{
			var eventItem = new EventItem
			{
				Type = EventType.KickOut_Notify,
				Description = message,
				OccuringTime = DateTime.Now
			};
			_eventQueue.Enqueue(eventItem);
			_writerToLog.WriteEvent(eventItem);
		}

		public void PostSoundMessage(string message)
		{
			var eventItem = new EventItem
			{
				Type = EventType.Sound_Notify,
				Description = message,
				OccuringTime = DateTime.Now
			};
			_eventQueue.Enqueue(eventItem);
			_writerToLog.WriteEvent(eventItem);
		}

		private bool PeriodicRun()
		{
            while (_eventQueue.TryDequeue(out var ev))
			{
				try
				{
                    _eventDb?.WriteEvent(ev);
                    _writerToMail?.WriteEvent(ev);
                    _eventService?.FireEvent(ev);
                    FireEvent?.Invoke(ev);
                }
				catch (Exception ex)
				{
					LOG.Error("Failed to post event", ex);
				}
			}
			return true;
		}

		/// <summary>
		/// 返回当前报警事件列表。
		/// </summary>
		/// <returns></returns>
		public List<EventItem> GetAlarmEvent()
		{
			return _alarmQueue.ToList();
		}

        /// <summary>
        /// 将当前事件管理器中的所有报警事件设置为已响应。
        /// </summary>
        public void AckAlarmEvents()
        {
			_alarmQueue.ToList().ForEach(x=>
            {
                x.IsAcknowledged = true;
				x.AcknowledgedTime = DateTime.Now;
            });
        }

		/// <summary>
		/// 清楚当前报警事件列表。
		/// </summary>
		public void ClearAlarmEvent()
		{
			_alarmQueue.Clear();
		}

		public List<EventItem> QueryDBEvent(string sql)
		{
			return _eventDb.QueryDBEvent(sql);
		}

		public void Subscribe(EventItem item)
		{
			if (!_dictEvTypeSource.ContainsKey(item.EventEnum))
			{
				_dictEvTypeSource[item.EventEnum] = item;
				if (item is AlarmEventItem eventItem)
				{
					_alarms.Add(eventItem);
				}
			}
		}

		public void PostInfoLog(string module, string message)
		{
			WriteEvent(module, INFORMATION_EVENT, message);
		}

		public void PostWarningLog(string module, string message)
		{
			WriteEvent(module, WARNING_EVENT, message);
		}

		public void PostAlarmLog(string module, string message)
		{
			WriteEvent(module, ALARM_EVENT, message);
		}

        #endregion
    }
}