using System;
using MECF.Framework.Simulator.Core.Driver;
using System.Linq;

namespace Venus_Simulator.Devices
{

    class TurboPumpMockPMA : SerialPortDeviceSimulator
    {
        public enum TurboPumpStatus
        {
            Unknown,
            OFF,
            ON,
            ERROR
        }


        private readonly byte PUMP_ON_FLAG = 0x02;
        private readonly byte RESERVE_FLAG = 0x80;
        private readonly byte ISO_VALVE_OPEN_FLAG = 0x01;
        private readonly byte WATER_VALVE_OEPN_FLAG = 0x08;
        private readonly byte VALVE_AT_SPEED_FLAG = 0x40;

        private byte pumpStatus
        {
            get
            {
                return (byte)((_simTurboPumpStatus == TurboPumpStatus.ON ? PUMP_ON_FLAG : 0) + RESERVE_FLAG);
            }
        }

        private byte valveStatus
        {
            get
            {
                return (byte)(ISO_VALVE_OPEN_FLAG + WATER_VALVE_OEPN_FLAG + VALVE_AT_SPEED_FLAG + RESERVE_FLAG);
            }
        }

        private const string EOF = "\r";
        private const char MSG_DELIMITER = '_';
        private const string MOCKUP_PORT = "COM61";

        private int _speed = 200;
        private int _temperature = 80;
        private Random _rd = new Random();

        TurboPumpStatus _simTurboPumpStatus;
        public TurboPumpMockPMA() : base(MOCKUP_PORT, -1, EOF, MSG_DELIMITER)
        {
            _simTurboPumpStatus = TurboPumpStatus.Unknown;
        }

        protected override void ProcessUnsplitMessage(string message)
        {
            if (string.IsNullOrEmpty(message))
                throw new ArgumentException("Hardware command message is invalid");

            string[] strs = message.Trim().Split('\r');
            foreach(string msg in strs)
            {
                string sRes = string.Empty;
                string str = msg.Trim();
                if (str.Length == 0)
                    continue;

                if (str.Contains("STA"))
                {
                    if (_simTurboPumpStatus == TurboPumpStatus.ON)
                    {
                        _speed = 200;
                    }
                    else
                    {
                        _speed = 0;
                    }
                    string strData = string.Format("#000,000,{0:D5},000,000,000,000,000,00,00000,{1:D3},099,0123456789012345678901234\r", _speed + _rd.Next(0, 5), _temperature + _rd.Next(-5, 5));
                    byte[] byteArray = System.Text.Encoding.Default.GetBytes(strData);
                    byteArray[6] = pumpStatus;
                    byteArray[7] = valveStatus;

                    OnWriteMessage(byteArray);
                    continue;
                }
                else if (str.Contains("TMPON"))
                {
                    sRes = "#000,OK\r";
                    _simTurboPumpStatus = TurboPumpStatus.ON;
                }
                else if (str.Contains("TMPOFF"))
                {
                    sRes = "#000,OK\r";
                    _simTurboPumpStatus = TurboPumpStatus.OFF;
                }
                else
                    continue;

                OnWriteMessage(sRes);
            }
        }
    }
}