namespace SHARP_CLAS_UI
{
    public class Aligner
    {
        #region Enum
        private enum ProcessSteps
        {
            Wait,

            ForwardSolOn,
            ForwardSolOnCheck,
            ForwardSensorCheck,

            ForwardSolOff,
            ForwardSolOffCheck,
            BackwardSensorCheck,
        }
        #endregion

        #region Property
        public bool ForwardSol
        {
            get
            {
                return _equipment.Board_Control.IO_manager.Get_Output(_forwardSol);
            }

            set
            {
                _equipment.Board_Control.IO_manager.Set_Output(_forwardSol, value);
            }
        }
        
        public bool IsForwardSensor1
        {
            get
            {
                return _equipment.Board_Control.IO_manager.Get_Input(_isForwardSensor1);
            }
        }

        public bool IsForwardSensor2
        {
            get
            {
                return _equipment.Board_Control.IO_manager.Get_Input(_isForwardSensor2);
            }
        }

        public bool IsBackwardSensor1
        {
            get
            {
                return _equipment.Board_Control.IO_manager.Get_Input(_isBackwardSensor1);
            }
        }

        public bool IsBackwardSensor2
        {
            get
            {
                return _equipment.Board_Control.IO_manager.Get_Input(_isBackwardSensor2);
            }
        }

        public bool IsForward
        {
            get
            {
                return ForwardSol && IsForwardSensor1 && IsForwardSensor2;
            }
        }

        public bool IsBackward
        {
            get
            {
                return ForwardSol == false && IsBackwardSensor1 && IsBackwardSensor2;
            }
        }

        public bool IsWorkEnd
        {
            get
            {
                if (_step == ProcessSteps.Wait)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
        }
        #endregion

        #region Field
        Equipment _equipment;

        private OutputData _forwardSol;

        private InputData _isForwardSensor1;
        private InputData _isForwardSensor2;

        private InputData _isBackwardSensor1;
        private InputData _isBackwardSensor2;

        private En_Alarm_List _forwardSensor1Alarm;
        private En_Alarm_List _forwardSensor2Alarm;
        private En_Alarm_List _backwardSensor1Alarm;
        private En_Alarm_List _backwardSensor2Alarm;
        private ProcessSteps _step;

        private SequenceTimer _sequenceTimer;

        private readonly int _retryLimitCount = 3;
        private int _retryCount;
        #endregion

        #region Construct
        public Aligner(Equipment equipment)
        {
            _equipment = equipment;
            _sequenceTimer = new SequenceTimer();
            _retryCount = 0;
            _step = ProcessSteps.Wait;
        }
        #endregion

        #region Function
        public void Initialize(OutputData forwardSol, InputData isForwardSensor1, InputData isForwardSensor2, InputData isBackwardSensor1, InputData isBackwardSensor2,
            En_Alarm_List forwardSensor1Alarm, En_Alarm_List forwardSensor2Alarm, En_Alarm_List backwardSensor1Alarm, En_Alarm_List backwardSensor2Alarm)
        {
            _forwardSol = forwardSol;
            _isForwardSensor1 = isForwardSensor1;
            _isForwardSensor2 = isForwardSensor2;
            _isBackwardSensor1 = isBackwardSensor1;
            _isBackwardSensor2 = isBackwardSensor2;

            _forwardSensor1Alarm = forwardSensor1Alarm;
            _forwardSensor2Alarm = forwardSensor2Alarm;
            _backwardSensor1Alarm = backwardSensor1Alarm;
            _backwardSensor2Alarm = backwardSensor2Alarm;
        }

        public void ExecuteProcess()
        {
            switch (_step)
            {
                case ProcessSteps.Wait:
                    {
                        break;
                    }
                case ProcessSteps.ForwardSolOn:
                    {
                        ForwardSol = true;
                        _sequenceTimer.Restart();
                        _step = ProcessSteps.ForwardSolOnCheck;
                        break;
                    }
                case ProcessSteps.ForwardSolOnCheck:
                    {
                        if(ForwardSol == true)
                        {
                            _retryCount = 0;
                            _sequenceTimer.Restart();
                            _step = ProcessSteps.ForwardSensorCheck;
                        }
                        else
                        {
                            if(_sequenceTimer.Seconds > 1)
                            {
                                if(_retryCount < _retryLimitCount)
                                {
                                    _retryCount++;
                                    _step = ProcessSteps.ForwardSolOn;
                                }
                                else
                                {
                                    _retryCount = 0;
                                    Interlock_Manager.Add_Interlock_Msg($"{_forwardSol} on fail.", $"{_forwardSol} on is fail (retry 3).");
                                    _step = ProcessSteps.Wait;
                                }
                            }
                        }
                        break;
                    }
                case ProcessSteps.ForwardSensorCheck:
                    {
                        if(IsForwardSensor1 && IsForwardSensor2)
                        {
                            _sequenceTimer.Reset();
                            _step = ProcessSteps.Wait;
                        }
                        else
                        {
                            if (_sequenceTimer.Seconds > _equipment.Setting.Cylinder_Timeout)
                            {
                                if(IsForwardSensor1 == false)
                                {
                                    Alarm_Manager.Instance.Occurred(_forwardSensor1Alarm);
                                }

                                if(IsForwardSensor2 == false)
                                {
                                    Alarm_Manager.Instance.Occurred(_forwardSensor2Alarm);
                                }

                                _step = ProcessSteps.Wait;
                            }
                        }
                        break;
                    }
                case ProcessSteps.ForwardSolOff:
                    {
                        ForwardSol = false;
                        _sequenceTimer.Restart();
                        _step = ProcessSteps.ForwardSolOffCheck;
                        break;
                    }

                case ProcessSteps.ForwardSolOffCheck:
                    {
                        if (ForwardSol == false)
                        {
                            _retryCount = 0;
                            _sequenceTimer.Restart();
                            _step = ProcessSteps.BackwardSensorCheck;
                        }
                        else
                        {
                            if (_sequenceTimer.Seconds > 1)
                            {
                                if (_retryCount < _retryLimitCount)
                                {
                                    _retryCount++;
                                    _step = ProcessSteps.ForwardSolOff;
                                }
                                else
                                {
                                    _retryCount = 0;
                                    Interlock_Manager.Add_Interlock_Msg($"{_forwardSol} off fail.", $"{_forwardSol} off is fail (retry 3).");
                                    _step = ProcessSteps.Wait;
                                }
                            }
                        }

                        break;
                    }
                case ProcessSteps.BackwardSensorCheck:
                    {
                        if (IsBackwardSensor1 && IsBackwardSensor2)
                        {
                            _sequenceTimer.Reset();
                            _step = ProcessSteps.Wait;
                        }
                        else
                        {
                            if (_sequenceTimer.Seconds > _equipment.Setting.Cylinder_Timeout)
                            {
                                if (IsBackwardSensor1 == false)
                                {
                                    Alarm_Manager.Instance.Occurred(_backwardSensor1Alarm);
                                }

                                if (IsBackwardSensor2 == false)
                                {
                                    Alarm_Manager.Instance.Occurred(_backwardSensor2Alarm);
                                }

                                _step = ProcessSteps.Wait;
                            }
                        }
                        break;
                    }
            }
        }

        public bool Forward()
        {
            if(IsWorkEnd)
            {
                if(ForwardSol && IsForwardSensor1 && IsForwardSensor2)
                {
                    return true;
                }
                else
                {
                    _step = ProcessSteps.ForwardSolOn;
                    return true;
                }
            }
            else
            {
                return false;
            }
        }

        public bool Backward()
        {
            if (IsWorkEnd)
            {
                if (ForwardSol == false && IsBackwardSensor1 && IsBackwardSensor2)
                {
                    return true;
                }
                else
                {
                    _step = ProcessSteps.ForwardSolOff;
                    return true;
                }
            }
            else
            {
                return false;
            }
        }
        #endregion
    }
}