using Aurora.Api.Devices;
using Hermes;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace AuroraLight.Fainstec
{
    internal class PNLight : SerialConn, IPNLight
    {
        private string _deviceId;
        private int _lightChannelCount;

        public bool _commError { get; set; } = false;
        private SerialConnConfig _connConfig;
        readonly int BYTE_MAX = 1024;
        public int[] LightValue { get; set; }

        const int LIGHT_MAX_VALUE = 255;
        protected int m_timeOut = 1;

        public PNLight(string deviceId, bool isSimul, int lightChannelCount) : base(deviceId, isSimul)
        {
            _deviceId = deviceId;
            _lightChannelCount = lightChannelCount;
            LightValue = new int[lightChannelCount];
        }

        public bool InitInternal(SerialConnConfig conn)
        {
            _connConfig = conn;
            LightValue = Enumerable.Repeat(0, (int)_lightChannelCount).ToArray<int>();

            bool bRet = false;
            try {
                // Legacy 에는 Buffer clear 를 위한 Reset 함수가 있으나, Aurora SerialConn 에서는 Write 할때 Buffer clear 를 자동으로 해준다.
                // Open 할때 자동으로 켜줄것인가? 켜는함수는 따로 호출할것인가. Legacy 에서는 자동으로 켜줬는데 다른 Device 는 자동으로 켜주지 않는다.
                bRet = Open(_connConfig) == E1.OK;
                if (bRet) {
                    bRet = OffLightInternal() == E1.OK;
                    if (bRet)
                        Log.D(string.Format("[ {0} CONNECTED ]", _deviceId));
                    _commError = !bRet;
                } else {
                    _commError = true;
                }
                return bRet;
            } catch (Exception e) {
                Log.W($"InitInternal Failed. ( {e.Message} )");
                return bRet;
            }

        }
        public bool IsPortErrorInternal()
        {
            return _commError;
        }

        public int OffLightInternal()
        {
            try {
                if (!IsConnected()) return E2.NOT_CONNECTED;
                SetAllLightPowerStatus(false);
                return E1.OK;
            } catch (Exception e) {
                Log.W($"OffLightInternal Failed. ( {e.Message} )");
                return E2.CANCELLED;
            }
        }
        public int OffLightInternal(int iChannel)
        {
            try {
                if (!IsConnected()) return E2.NOT_CONNECTED;
                SetLightPowerStatus(iChannel, false);
                return E1.OK;
            } catch (Exception e) {
                Log.W($"{iChannel}ch OffLightInternal Failed. ( {e.Message} )");
                return E2.CANCELLED;
            }
        }
        public int SetLightValueInternal(List<int> values)
        {
            try {
                bool bRet = true;
                for (int i = 0; i < values.Count; i++) {
                    if (SetLightBrightness(i, values[i]) != E1.OK)
                        bRet = false;
                }
                return bRet ? E1.OK : E2.CANCELLED;
            } catch (Exception e) {
                Log.W($"SetLightValueInternal Failed. ( {e.Message} )");
                return E2.CANCELLED;
            }
        }

        public int SetLightValueInternal(int iChannel, int iValue)
        {
            try {
                return SetLightBrightness(iChannel, iValue);
            } catch (Exception e) {
                Log.W($"{iChannel}ch SetLightValueInternal Failed. ( {e.Message} )");
                return E2.CANCELLED;
            }
        }
        public void SetAllLightPowerStatus(bool on)
        {
            for (int i = 0; i < _lightChannelCount; i++) {
                SetLightPowerStatus(i, on);
            }
        }

        /// <summary>
        /// 조명의 채널을 키고 끄는 함수(밝기 값은 유지됨)
        /// </summary>
        /// <param name="channel">설정할 조명 채널(0부터 시작)</param>
        /// <param name="on">ON/OFF</param>
        public void SetLightPowerStatus(int channel, bool bOn)
        {
            try {
                if (!IsConnected())
                    return;
                else if (channel < 0 || _lightChannelCount - 1 < channel)
                    return;

                if (bOn == false) {
                    // 조명 컨트롤러 OFF 설정
                    byte[] command = new byte[4];
                    command[0] = 0x45; //선두문자
                    command[1] = Encoding.ASCII.GetBytes(Convert.ToString(channel + 1))[0]; ; //Channel 번호
                    command[2] = 0x0D;// CR
                    command[3] = 0x0A;// LF

                    Write(command);
                } else {
                    //CAUTION: 조명 컨트롤러에서 별도로 ON하는 기능은 없고, 밝기값으로 설정해야 함. 
                    SetLightBrightness(channel, LightValue[channel]);
                }
            } catch (Exception e) {
                Log.W($"{channel}ch SetLightPowerStatus Failed. ( {e.Message} )");
            }
        }
        public int SetLightBrightness(int channel, int brightnessValue)
        {
            // <param> brightnessValue : (0~100)

            uint targetLightValue = (uint)(LIGHT_MAX_VALUE * (brightnessValue * 0.01));

            try {
                if (!IsConnected())
                    return E2.NOT_CONNECTED;

                if (!ChannelValidCheck(channel))
                    return E2.INVALID_ARGUMENT;

                if (!ValueValidCheck(brightnessValue))
                    return E2.INVALID_ARGUMENT;

                //ON/OFF 설정
                byte[] command = new byte[7];
                command[0] = 0x4C; //선두문자
                command[1] = Encoding.ASCII.GetBytes(Convert.ToString(channel + 1))[0]; ; //Channel 번호

                byte[] value = Encoding.ASCII.GetBytes(string.Format("{0:D3}", targetLightValue));
                Array.Copy(value, 0, command, 2, value.Length);

                command[5] = 0x0D;// CR
                command[6] = 0x0A;// LF

                if (Write(command)) {
                    LightValue[channel] = brightnessValue;
                    return E1.OK;
                } else {
                    return E2.CANCELLED;
                }
            } catch (Exception e) {
                Log.W($"{channel}ch SetLightBrightness Failed. ( {e.Message} )");
                return E2.CANCELLED;
            }

        }
        private bool ChannelValidCheck(int iChannel)
        {
            if (iChannel < _lightChannelCount && iChannel >= 0) {
                return true;
            } else {
                Log.W($"Channel is not exist. Range : 0~{(int)_lightChannelCount - 1} Input : {iChannel}");
                return false;
            }
        }

        private bool ValueValidCheck(int iValue)
        {
            if (iValue <= 100 && iValue >= 0) {
                return true;
            } else {
                Log.W($"LightValue Range Error. Range : 0~255, Input : {iValue}");
                return false;
            }
        }
    }
}