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

namespace Venus_Simulator.Devices
{

    class ESCHVMockPMC : SerialPortDeviceSimulator
    {
        public enum EscHvStatus
        {
            Unknown,
            OFF,
            ON,
            ERROR
        }

        private const string EOF = "\r";
        private const char MSG_DELIMITER = '_';
        private const string MOCKUP_PORT = "COM18";
        private int _voltage = 120;
        private int _current_limit = 20;
        private int _up_ramp_time = 0;
        private int _down_ramp_time = 0;
        private Random _rd = new Random();

        EscHvStatus _simEscHvStatus;
        public ESCHVMockPMC() : base(MOCKUP_PORT, -1, EOF, MSG_DELIMITER)
        {
            _simEscHvStatus = EscHvStatus.ON;
        }

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

            string sRes = "\r\n>";
            string str = message.Trim();
            string operation = message.Substring(0, 2);
            int data = 0;
            bool bHasValidateData = false;
            if(message.Length > 2)
            {
                if (int.TryParse(message.Substring(2), out data))
                {
                    bHasValidateData = true;
                }
            }
            switch (operation)
            {
                case "SV":
                    if (bHasValidateData) _voltage = data;
                    break;
                case "SI:":
                    if (bHasValidateData) _current_limit = data;
                    break;
                case "P+":
                    if (bHasValidateData) _up_ramp_time = data;
                    break;
                case "P-":
                    if (bHasValidateData) _down_ramp_time = data;
                    break;
                case "RV":
                    int out_valtage = _simEscHvStatus == EscHvStatus.ON ? _voltage + _rd.Next(-3, 5) : 0;
                    sRes = string.Format("RV\r\n\r{0:D4}\n\r>", out_valtage);//$"{out_valtage}\n\r>";
                    break;
                case "R+":
                    //sRes = $"{_rd.Next(0, _current_limit)}\n\r>"
                    sRes = string.Format("R+\r\n\r{0:D4}\n\r>", 2);

                    break;
                case "R-":
                    sRes = string.Format("R-\r\n\r{0:D4}\n\r>", 1);
                    break;
                case "SB":
                    sRes = string.Format("SB\r{0:D4}\n\r>", _simEscHvStatus == EscHvStatus.ON ? 4 : 0); //$"{(_simEscHvStatus == EscHvStatus.ON ? 4 : 0)}\r\n>";
                    break;
                case "EV":
                    _simEscHvStatus = EscHvStatus.ON;
                    break;
                case "DV":
                    _simEscHvStatus = EscHvStatus.OFF;
                    break;
            }
            OnWriteMessage(sRes);
        }
    }
}