using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Aitex.Core.Util;
using System.IO;
using System.ServiceModel;
using Aitex.Core.WCF;
using Aitex.Core.RT.Log;

namespace Aitex.Core.RT.Event
{
    public class EventManager : ICommonEvent
    {
        public event Action<EventItem> FireEvent;
        public event Action<EventItem> OnAlarmEvent;

        FixSizeQueue<EventItem> _eventQueue;
        FixSizeQueue<EventItem> _alarmQueue;
        PeriodicJob _eventJob;

        EventDBWriter _eventDB;
        EventLogWriter _writerToLog;
        EventMailWriter _writerToMail;
        EventService _eventService;
        ServiceHost _eventServiceHost;


        Dictionary<string, EventItem> _eventDic = new Dictionary<string, EventItem>();

        private const string INFORMATION_EVENT = "INFORMATION_EVENT";
        private const string WARNING_EVENT = "WARNING_EVENT";
        private const string ALARM_EVENT = "ALARM_EVENT";

        public EventManager()
        {

        }

        public void Initialize(string commonEventListXmlFile, bool needCreateService = true, bool needSaveDB = true, bool needMailOut = false, string localEventListXmlFile=null)
        {
            if (needSaveDB)
            {
                _eventDB = new EventDBWriter();
                try
                {
                    _eventDB.Initialize();
                }
                catch (Exception ex)
                {
                    LOG.Write(ex);
                }
            }
            _writerToLog = new EventLogWriter();

            if (needMailOut)
            {
                _writerToMail = new EventMailWriter();
            }

            if (needCreateService)
            {
                try
                {
                    _eventService = new EventService();
                    _eventServiceHost = new ServiceHost(_eventService);
                    _eventServiceHost.Open();
                }
                catch (Exception ex)
                {
                    throw new ApplicationException("创建Event服务失败，" + ex.Message);
                }
            }

            _eventQueue = new FixSizeQueue<EventItem>(1000);
            _alarmQueue = new FixSizeQueue<EventItem>(1000);
            _eventJob = new PeriodicJob(100, this.PeriodicRun, "EventPeriodicJob", true);

            try
            {
                EventDefine eventList = CustomXmlSerializer.Deserialize<EventDefine>(new FileInfo(commonEventListXmlFile));

                foreach (var item in eventList.Items)
                    _eventDic[item.EventEnum] = item;
            }
            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，" + commonEventListXmlFile + ",\r\n" + ex.Message);
            }

            try
            {
                if (!string.IsNullOrEmpty(localEventListXmlFile))
                {
                    EventDefine evList = CustomXmlSerializer.Deserialize<EventDefine>(new FileInfo(localEventListXmlFile));

                    foreach (var item in evList.Items)
                        _eventDic[item.EventEnum] = item;
                }
            }
            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;
        }

        public void Terminate()
        {
            if (_eventJob != null)
            {
                _eventJob.Stop();
                _eventJob = null;
            }

            if (_eventServiceHost != null)
            {
                _eventServiceHost.Close();
                _eventServiceHost = null;
            }
        }

        public void WriteEvent(string eventName)
        {
            if (!_eventDic.ContainsKey(eventName))
            {
                LOG.Write("Event name not registered, " + eventName);
                return;
            }

            WriteEvent(_eventDic[eventName].Source, eventName);
        }

        public void WriteEvent(string module, string eventName, string message)
        {
            if (!_eventDic.ContainsKey(eventName))
            {
                LOG.Write("Event name not registered, " + eventName);
                return;
            }

            EventItem item = _eventDic[eventName].Clone();
            item.Source = module;
            item.Description = message;
            item.OccuringTime = DateTime.Now;

            _eventQueue.Enqueue(item);

            if (item.Level == EventLevel.Alarm || item.Level == EventLevel.Warning)
            {
                _alarmQueue.Enqueue(item);

                if (OnAlarmEvent != null)
                    OnAlarmEvent(item);
            }

            _writerToLog.WriteEvent(item);

            //WriteEvent(eventName);
        }

        public void WriteEvent(string eventName, SerializableDictionary<string, string> dvid)
        {
            if (!_eventDic.ContainsKey(eventName))
            {
                LOG.Write("Event name not registered, " + eventName);
                return;
            }
            WriteEvent(_eventDic[eventName].Source, eventName, dvid);
        }

        public void WriteEvent(string module, string eventName, params object[] args)
        {
            EventItem item = _eventDic[eventName].Clone();
            item.Source = module;
            if(_eventDic[eventName].Description == null)
            {
                LOG.Error($"{module}.{eventName}, found empty description event.");
                return;
            }
            item.Description = string.Format(_eventDic[eventName].Description, args);
            if (!string.IsNullOrEmpty(_eventDic[eventName].GlobalDescription_en))
            item.GlobalDescription_en = string.Format(_eventDic[eventName].GlobalDescription_en, args);
            if (!string.IsNullOrEmpty(_eventDic[eventName].GlobalDescription_zh))
            item.GlobalDescription_zh = string.Format(_eventDic[eventName].GlobalDescription_zh, args);
            item.OccuringTime = DateTime.Now;

            _eventQueue.Enqueue(item);

            if (item.Level == EventLevel.Alarm || item.Level == EventLevel.Warning)
            {
                _alarmQueue.Enqueue(item);

                if (OnAlarmEvent != null)
                    OnAlarmEvent(item);
            }
            _writerToLog.WriteEvent(item);
        }

        public void WriteEvent(string module, string eventName, SerializableDictionary<string, string> dvid, params object[] args)
        {
            EventItem item = _eventDic[eventName].Clone();
            item.Source = module;
            item.Description = string.Format(_eventDic[eventName].Description, args);
            if (!string.IsNullOrEmpty(_eventDic[eventName].GlobalDescription_en))
            item.GlobalDescription_en = string.Format(_eventDic[eventName].GlobalDescription_en, args);
            if (!string.IsNullOrEmpty(_eventDic[eventName].GlobalDescription_zh))
            item.GlobalDescription_zh = string.Format(_eventDic[eventName].GlobalDescription_zh, args);
            item.OccuringTime = DateTime.Now;
            item.dvid = dvid;

            _eventQueue.Enqueue(item);

            if (item.Level == EventLevel.Alarm || item.Level == EventLevel.Warning)
            {
                _alarmQueue.Enqueue(item);

                if (OnAlarmEvent != null)
                    OnAlarmEvent(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);
        }


        bool PeriodicRun()
        {
            EventItem ev;

            while (_eventQueue.TryDequeue(out ev))
            {
                try
                {
                    if (_eventDB!= null)
                        _eventDB.WriteEvent(ev);

                    //_writerToLog.WriteEvent(ev);

                    if (_writerToMail != null)
                        _writerToMail.WriteEvent(ev);

                    if (_eventService != null)
                        _eventService.FireEvent(ev);

                    if (FireEvent != null)
                        FireEvent(ev);
                }
                catch (Exception ex)
                {
                    LOG.Error("事件输出失败", ex);
                }
            }

            return true;
        }


        public List<EventItem> GetAlarmEvent()
        {
            return _alarmQueue.ToList();
        }

        public void ClearAlarmEvent()
        {
            _alarmQueue.Clear();
        }


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

        }

        public void Subscribe(EventItem item)
        {
            if (_eventDic.ContainsKey(item.EventEnum))
            {
                return;
            }

            _eventDic[item.EventEnum] = item;
        }

        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);
        }

    }
}