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

namespace Venus_Simulator.Devices
{
    class PendulumValveMockPMB : SerialPortDeviceSimulator
    {
        public enum PendulumValveStatus
        {
            Unknown,
            OFF,
            ON,
            ERROR
        }

        private const string EOF = "\r";
        private const char MSG_DELIMITER = '_';
        private const string MOCKUP_PORT = "COM73";
        private int _pressure = 120;
        private int _position = 500;
        private bool _bHold = false;
        private Random _rd = new Random();

        PendulumValveStatus _simPendulumValveStatus;
        public PendulumValveMockPMB() : base(MOCKUP_PORT, -1, EOF, MSG_DELIMITER)
        {
            _simPendulumValveStatus = PendulumValveStatus.Unknown;
        }

        protected override void ProcessUnsplitMessage(string message)
        {
            if (string.IsNullOrEmpty(message))
                throw new ArgumentException("Hardware command message is invalid");
            var items = message.Split('\r');
            foreach (var item in message.Split('\r'))
            {

                if (item == "")
                {
                    continue;
                }
                string item2 = item + "\r";

                if (_bHold == false)
                {
                    //_pressure += _rd.Next(-10, 10);
                    //_position += _rd.Next(-50, 50);
                }

                if (_simPendulumValveStatus == PendulumValveStatus.OFF)
                {
                    _position = 0;
                }

                string sRes = string.Empty;
                string str = item2.Trim();
                switch (str)
                {
                    case "P:":
                        sRes = string.Format("P:{0:D8}\r\n", _pressure);
                        break;
                    case "A:":
                        sRes = string.Format("A:{0:D6}\r\n", _position);
                        break;
                    case "C:":
                        _bHold = false;
                        _simPendulumValveStatus = PendulumValveStatus.OFF;
                        sRes = "C:\r\n";
                        break;
                    case "O:":
                        _bHold = false;
                        _simPendulumValveStatus = PendulumValveStatus.ON;
                        sRes = "O:\r\n";
                        break;
                    case "H:":
                        _bHold = true;
                        sRes = "H:\r\n";
                        break;
                    case "i:30":
                        string data = _simPendulumValveStatus == PendulumValveStatus.OFF ? "3" : "4";
                        sRes = $"i:301{data}100000\r\n";
                        break;
                    case "i:02A04":

                        sRes = $"i:02B041000.1\r\n";
                        break;
                    case "i:02A05":

                        sRes = $"i:02B051001.2\r\n";
                        break;
                    default:
                        {
                            if (str.Contains("S:"))
                            {
                                int pressure;
                                if (int.TryParse(str.Substring(2, 8), out pressure))
                                {
                                    _pressure = pressure;
                                }

                                _bHold = false;
                                sRes = "S:\r\n";
                            }
                            else if (str.StartsWith("R:"))
                            {
                                int position;
                                if (int.TryParse(str.Substring(2, 6), out position))
                                {
                                    _position = position;
                                }

                                _bHold = false;
                                sRes = "R:\r\n";
                            }
                            else
                                return;
                        }
                        break;
                }
                OnWriteMessage(sRes);
            }

        }
    }
}