/*
  * Copyright (c) 2025 LG Electronics Inc.
   * SPDX-License-Identifier: LicenseRef-LGE-Proprietary
   */
using System;
using System.Collections.Generic;
using Hermes;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace VisionLight {
    /// <summary>
    /// !!! 반드시 UDP로 통신할 해야 함 !!!
    /// [상시 조명 컨트롤러 - 4CH / 소켓 통신]
    /// Range : (0,255)
    /// SocketProtocol : TCP or UDP
    /// IpAddress : XXX.XXX.XXX.XXX
    /// PortNumber : XXX
    /// </summary>
    internal class Light_LVS_EN04_Socket : LightBase_Socket {
        public const byte CMD_START_CODE = 0x01;
        public const byte CMD_END_CODE = 0x04;

        public const byte CMD_OP_CODE_WRITE = 0x00;

        public const byte LENGTH_DATA_MSG = 0x01;

        public const byte ADDR_SET_LIGHT_ONOFF = 0x34;
        public const byte ADDR_CHANNEL_SELECT = 0x20;
        public const byte ADDR_STEP_VALUE = 0x28;

        public const byte LENGTH_LIGHT_ONOFF_REQUEST_MSG = 6;
        public const byte LENGTH_SET_CHANNEL_REQUEST_MSG = 6;
        public const byte LENGTH_SET_LEVEL_REQUEST_MSG = 6;

        public Light_LVS_EN04_Socket(string deviceId) : base(deviceId) { }

        protected override eLightResult SetLevelImpl(int level, int channel) {
            lock (LockThis) {
                if (ChannelSelect(channel) == E1.OK) {
                    if (SendData_SetLevel(level) == E1.OK) {
                        return eLightResult.OK;
                    }
                    else {
                        return eLightResult.NG;
                    }
                }
                else {
                    return eLightResult.NG;
                }
            }
        }

        private int ChannelSelect(int channel) {
            try {
                byte[] sendData = CreateChannelSelectReqMsg(channel);
                //SerialConn.Write(sendData, sendData.Length);
                //SocketConn.Send(sendData);
                SocketConn.SendAndRecieve(sendData, out byte[] receiveData);

                if (IsRecevieDataACK(receiveData)) {
                    return E1.OK;
                }
            }
            catch (Exception e) {
                LOG.FuncE(e.Message);
            }
            return E1.GENERIC;
        }

        private byte[] CreateChannelSelectReqMsg(int channel) {
            byte[] requestMsg = new byte[LENGTH_SET_CHANNEL_REQUEST_MSG];
            requestMsg[0] = CMD_START_CODE;
            requestMsg[1] = CMD_OP_CODE_WRITE;
            requestMsg[2] = LENGTH_DATA_MSG;
            requestMsg[3] = ADDR_CHANNEL_SELECT;
            requestMsg[4] = (byte)channel;
            requestMsg[5] = CMD_END_CODE;

            return requestMsg;
        }

        private int SendData_SetLevel(int level) {
            try {
                byte[] sendData = CreateSetLevelReqMsg(level);
                //SerialConn.Write(sendData, sendData.Length);
                //SocketConn.Send(sendData);
                SocketConn.SendAndRecieve(sendData, out byte[] receiveData);

                if (IsRecevieDataACK(receiveData)) {
                    return E1.OK;
                }
            }
            catch (Exception e) {
                LOG.FuncE(e.Message);
            }

            return E1.GENERIC;
        }

        private byte[] CreateSetLevelReqMsg(int level) {
            byte[] requestMsg = new byte[LENGTH_SET_LEVEL_REQUEST_MSG];
            requestMsg[0] = CMD_START_CODE;
            requestMsg[1] = CMD_OP_CODE_WRITE;
            requestMsg[2] = LENGTH_DATA_MSG;
            requestMsg[3] = ADDR_STEP_VALUE;
            requestMsg[4] = (byte)level;
            requestMsg[5] = CMD_END_CODE;

            return requestMsg;
        }

        protected override eLightResult SetOffImpl(int channel) {
            lock (LockThis) {
                if (SendData_SetOnOff(channel) == E1.OK) {
                    return eLightResult.OK;
                }
                else {
                    return eLightResult.NG;
                }
            }
        }

        protected override eLightResult SetOnImpl(int channel) {
            lock (LockThis) {
                if (SendData_SetOnOff(channel) == E1.OK) {
                    return eLightResult.OK;
                }
                else {
                    return eLightResult.NG;
                }
            }
        }

        private int SendData_SetOnOff(int channel) {
            try {
                byte ChOnOffs = ConvertChOnOffs(channel, LastChOnOffs);
                byte[] sendData = CreateSetOnOffReqMsg(ChOnOffs);
                //SerialConn.Write(sendData, sendData.Length);
                //SocketConn.Send(sendData);
                SocketConn.SendAndRecieve(sendData, out byte[] receiveData);

                if (IsRecevieDataACK(receiveData)) {
                    return E1.OK;
                }
            }
            catch (Exception e) {
                LOG.FuncE(e.Message);
            }
            return E1.GENERIC;
        }

        private static byte ConvertChOnOffs(int channel, Dictionary<int, bool> lastChOnOffs) {
            string onOffs = "";
            for (int i = 3; i >= 0; i--) {
                if (i == channel) {
                    lastChOnOffs[i] = !lastChOnOffs[i];
                }
                if (lastChOnOffs.ContainsKey(i)) {
                    if (lastChOnOffs[i].Equals(true)) {
                        onOffs += "1";
                    }
                    else {
                        onOffs += "0";
                    }
                }
            }
            return (byte)Convert.ToInt32(onOffs, 2);
        }

        private static byte[] CreateSetOnOffReqMsg(byte data) {
            byte[] requestMsg = new byte[LENGTH_LIGHT_ONOFF_REQUEST_MSG];
            requestMsg[0] = CMD_START_CODE;
            requestMsg[1] = CMD_OP_CODE_WRITE;
            requestMsg[2] = LENGTH_DATA_MSG;
            requestMsg[3] = ADDR_SET_LIGHT_ONOFF;
            requestMsg[4] = data;
            requestMsg[5] = CMD_END_CODE;

            return requestMsg;
        }

        private bool IsRecevieDataACK(byte[] receiveData) {
            if (receiveData == null) {
                LOG.FuncE("ReceiveData is null.");
                return false;
            }
            else if (receiveData.Length == 0) {
                LOG.FuncE("ReceiveData Length Zero.");
                return false;
            }
            else if (receiveData[0] == 0x15) {
                LOG.FuncE("ReceiveData NAK Error.");
                return false;
            }
            else {
                return true;    // 0x06 : ACK
            }
        }
    }
}