using System;
using System.Xml;
using Aitex.Core.RT.Device;
using Aitex.Core.RT.Event;
using Aitex.Core.RT.IOCore;
using Aitex.Core.RT.SCCore;
using Aitex.Core.RT.Tolerance;
using Aitex.Core.Util;
using MECF.Framework.Common.Event;

namespace MECF.Framework.Common.Aitex.Core.RT.Device
{
    /// <summary>
    /// 具有SetPoint、FeedBack误差实时检测功能的设备基类。
    /// <para>注意：在子类中注册FeedbackGetter、SetPointGetter、RampTimerGetter</para>
    /// </summary>
    public class ErrorDetectableBaseDevice : BaseDevice, IDevice
    {

        #region Variable
        
        private readonly R_TRIG _alarmTrigger;

        /// <summary>
        /// 是否启用误差检测
        /// </summary>
        private readonly bool _isEnableErrDetection;

        /// <summary>
        /// 误差报警超限阈值
        /// </summary>
        private readonly double _alarmRange;

        /// <summary>
        /// 误差报警超限持续时间
        /// </summary>
        private readonly double _alarmTime;

        /// <summary>
        /// 误差警告超限阈值
        /// </summary>
        private readonly double _warningRange;

        /// <summary>
        /// 误差警告超限持续时间
        /// </summary>
        private readonly double _warningTime;

        protected readonly DIAccessor DiAlarm;
        protected readonly string AlarmText;
        
        /// <summary>
        /// 误差超限警告检查器
        /// </summary>
        protected readonly ToleranceChecker ErrWarningChecker;
        
        /// <summary>
        /// 误差超限报警检查器
        /// </summary>
        protected readonly ToleranceChecker ErrAlarmChecker;
        
        private readonly AlarmEventItem _alarmEvent;
        private readonly AlarmEventItem _warningEvent;

        #endregion

        #region Constructors

        public ErrorDetectableBaseDevice(string module, XmlElement node, string ioModule = "")
        {
            var attrModule = node.GetAttribute("module");
            Module = string.IsNullOrEmpty(attrModule) ? module : attrModule;
            Unit = node.GetAttribute("unit");
            Name = node.GetAttribute("id");
            Display = node.GetAttribute("display");
            DeviceID = node.GetAttribute("schematicId");

            // 获取diAlarm
            DiAlarm = ParseDiNode("diAlarm", node, ioModule);
            
            // 获取Alarm Text
            AlarmText = node.GetAttribute("AlarmText");
            
       
            var scBasePath = node.GetAttribute("scBasePath");
            scBasePath = string.IsNullOrEmpty(scBasePath) ? $"{Module}.{Name}" : scBasePath.Replace("{module}", Module);
            ScBasePath = scBasePath;

            _isEnableErrDetection =
                ParseScNode("scEnableAlarm", node, ioModule, $"{scBasePath}.{Display}.EnableAlarm")?.BoolValue ?? false;
            _alarmRange =
                ParseScNode("scAlarmRange", node, ioModule, $"{scBasePath}.AlarmRange")?.DoubleValue ??
                double.NaN;
            _alarmTime = ParseScNode("scAlarmTime", node, ioModule, $"{scBasePath}.AlarmTime")?.IntValue ??
                         int.MinValue;

            _warningRange = SC.GetConfigItem($"{scBasePath}.WarningRange")?.DoubleValue ?? double.NaN;
            _warningTime = SC.GetConfigItem($"{scBasePath}.WarningTime")?.IntValue ?? int.MinValue;

            _alarmTrigger = new R_TRIG();
            ErrWarningChecker = new ToleranceChecker();
            ErrAlarmChecker = new ToleranceChecker();

            _warningEvent = SubscribeAlarm($"{Module}.{Display}.ToleranceWarning", "", ResetWarningChecker,
                EventLevel.Warning);
            _alarmEvent = SubscribeAlarm($"{Module}.{Display}.ToleranceAlarm", "", ResetAlarmChecker);

        }

        #endregion

        #region Properties

        protected string Unit
        {
            get; set;
        }

        #endregion

        #region Methods

        private bool ResetWarningChecker()
        {
            ErrWarningChecker.Reset(_warningTime);
            return true;
        }

        private bool ResetAlarmChecker()
        {
            ErrAlarmChecker.Reset(_alarmTime);
            return true;
        }

        /// <summary>
        /// 监测设置值和反馈值误差
        /// </summary>
        public virtual void MonitorSpFbError(bool allowErrorCheck, double setPoint, double feedback)
        {
            _alarmTrigger.CLK = DiAlarm != null && DiAlarm.Value;
            if (_alarmTrigger.Q)
            {
                EV.PostAlarmLog(Module, AlarmText);
            }

            if (!_isEnableErrDetection || !allowErrorCheck)
            {
                ErrWarningChecker.RST = true;
                ErrAlarmChecker.RST = true;
                return;
            }


            // Out-of-rang Alarm detection
            var alarmLow = (setPoint * Math.Abs(100 - _alarmRange) / 100);
            var alarmHigh = (setPoint * Math.Abs(100 + _alarmRange) / 100);
            ErrAlarmChecker.Monitor(feedback, alarmLow, alarmHigh, _alarmTime);
            if (ErrAlarmChecker.Trig)
            {
                _alarmEvent.Description = $"{Display} feedback ({feedback:F1}{Unit}) out of range {alarmLow} - {alarmHigh} {Unit}  in {_alarmTime:F0} seconds";
                _alarmEvent.Set();
            }
            
            // 如果报Alarm，不再检查Warning。
            if (_alarmEvent.IsTriggered)
                return;

            // Out-of-rang warning detection
            var warnLow = (setPoint * Math.Abs(100 - _warningRange) / 100);
            var warnHigh = (setPoint * Math.Abs(100 + _warningRange) / 100);

            ErrWarningChecker.Monitor(feedback, warnLow, warnHigh, _warningTime);
            if (ErrWarningChecker.Trig)
            {
                _warningEvent.Description = $"{Display} feedback ({feedback:F1}{Unit}) out of range {warnLow} - {warnHigh} {Unit} in {_warningTime:F0} seconds";
                _warningEvent.Set();
            }

        }

        public virtual bool Initialize()
        {
            return true;
        }

        public virtual void Monitor()
        {
            
        }

        public virtual void Terminate()
        {
            
        }

        public virtual void Reset()
        {
            _alarmTrigger.RST = true;
            ErrAlarmChecker.Reset(_alarmTime);
            ErrWarningChecker.Reset(_warningTime);
            _warningEvent.Reset();
            _alarmEvent.Reset();
        }

        #endregion
    }
}