using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TFT_MelsecMcNet
{
    /// <summary>
    /// 所有三菱通讯类的通用辅助工具类，包含了一些通用的静态方法，可以使用本类来获取一些原始的报文信息。详细的操作参见例子
    /// </summary>
    public class MelsecHelper
    {
        #region Melsec Mc

        /// <summary>
        /// 解析A1E协议数据地址
        /// </summary>
        /// <param name="address">数据地址</param>
        /// <returns></returns>
        public static OperateResult<MelsecA1EDataType, ushort> McA1EAnalysisAddress(string address)
        {
            var result = new OperateResult<MelsecA1EDataType, ushort>();
            try
            {
                switch (address[0])
                {
                    case 'X':
                    case 'x':
                        {
                            result.Content1 = MelsecA1EDataType.X;
                            result.Content2 = Convert.ToUInt16(address.Substring(1), MelsecA1EDataType.X.FromBase);
                            break;
                        }
                    case 'Y':
                    case 'y':
                        {
                            result.Content1 = MelsecA1EDataType.Y;
                            result.Content2 = Convert.ToUInt16(address.Substring(1), MelsecA1EDataType.Y.FromBase);
                            break;
                        }
                    case 'M':
                    case 'm':
                        {
                            result.Content1 = MelsecA1EDataType.M;
                            result.Content2 = Convert.ToUInt16(address.Substring(1), MelsecA1EDataType.M.FromBase);
                            break;
                        }
                    case 'S':
                    case 's':
                        {
                            result.Content1 = MelsecA1EDataType.S;
                            result.Content2 = Convert.ToUInt16(address.Substring(1), MelsecA1EDataType.S.FromBase);
                            break;
                        }
                    case 'D':
                    case 'd':
                        {
                            result.Content1 = MelsecA1EDataType.D;
                            result.Content2 = Convert.ToUInt16(address.Substring(1), MelsecA1EDataType.D.FromBase);
                            break;
                        }
                    case 'R':
                    case 'r':
                        {
                            result.Content1 = MelsecA1EDataType.R;
                            result.Content2 = Convert.ToUInt16(address.Substring(1), MelsecA1EDataType.R.FromBase);
                            break;
                        }
                    default: throw new Exception(StringResources.Language.NotSupportedDataType);
                }
            }
            catch (Exception ex)
            {
                result.Message = ex.Message;
                return result;
            }

            result.IsSuccess = true;
            return result;
        }

        /// <summary>
        /// 从三菱地址，是否位读取进行创建读取的MC的核心报文
        /// </summary>
        /// <param name="isBit">是否进行了位读取操作</param>
        /// <param name="addressData">三菱Mc协议的数据地址</param>
        /// <returns>带有成功标识的报文对象</returns>
        public static byte[] BuildReadMcCoreCommand(McAddressData addressData, bool isBit)
        {
            byte[] command = new byte[10];
            command[0] = 0x01;                                                      // 批量读取数据命令
            command[1] = 0x04;
            command[2] = isBit ? (byte)0x01 : (byte)0x00;                           // 以点为单位还是字为单位成批读取
            command[3] = 0x00;
            command[4] = BitConverter.GetBytes(addressData.AddressStart)[0];      // 起始地址的地位
            command[5] = BitConverter.GetBytes(addressData.AddressStart)[1];
            command[6] = BitConverter.GetBytes(addressData.AddressStart)[2];
            command[7] = addressData.McDataType.DataCode;                           // 指明读取的数据
            command[8] = (byte)(addressData.Length % 256);                          // 软元件的长度
            command[9] = (byte)(addressData.Length / 256);

            return command;
        }

        /// <summary>
        /// 从三菱地址，是否位读取进行创建读取Ascii格式的MC的核心报文
        /// </summary>
        /// <param name="addressData">三菱Mc协议的数据地址</param>
        /// <param name="isBit">是否进行了位读取操作</param>
        /// <returns>带有成功标识的报文对象</returns>
        public static byte[] BuildAsciiReadMcCoreCommand(McAddressData addressData, bool isBit)
        {
            byte[] command = new byte[20];
            command[0] = 0x30;                                                               // 批量读取数据命令
            command[1] = 0x34;
            command[2] = 0x30;
            command[3] = 0x31;
            command[4] = 0x30;                                                               // 以点为单位还是字为单位成批读取
            command[5] = 0x30;
            command[6] = 0x30;
            command[7] = isBit ? (byte)0x31 : (byte)0x30;
            command[8] = Encoding.ASCII.GetBytes(addressData.McDataType.AsciiCode)[0];          // 软元件类型
            command[9] = Encoding.ASCII.GetBytes(addressData.McDataType.AsciiCode)[1];
            command[10] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[0];            // 起始地址的地位
            command[11] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[1];
            command[12] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[2];
            command[13] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[3];
            command[14] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[4];
            command[15] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[5];
            command[16] = SoftBasic.BuildAsciiBytesFrom(addressData.Length)[0];                                             // 软元件点数
            command[17] = SoftBasic.BuildAsciiBytesFrom(addressData.Length)[1];
            command[18] = SoftBasic.BuildAsciiBytesFrom(addressData.Length)[2];
            command[19] = SoftBasic.BuildAsciiBytesFrom(addressData.Length)[3];

            return command;
        }

        /// <summary>
        /// 以字为单位，创建数据写入的核心报文
        /// </summary>
        /// <param name="addressData">三菱Mc协议的数据地址</param>
        /// <param name="value">实际的原始数据信息</param>
        /// <returns>带有成功标识的报文对象</returns>
        public static byte[] BuildWriteWordCoreCommand(McAddressData addressData, byte[] value)
        {
            if (value == null) value = new byte[0];
            byte[] command = new byte[10 + value.Length];
            command[0] = 0x01;                                                        // 批量写入数据命令
            command[1] = 0x14;
            command[2] = 0x00;                                                        // 以字为单位成批读取
            command[3] = 0x00;
            command[4] = BitConverter.GetBytes(addressData.AddressStart)[0];        // 起始地址的地位
            command[5] = BitConverter.GetBytes(addressData.AddressStart)[1];
            command[6] = BitConverter.GetBytes(addressData.AddressStart)[2];
            command[7] = addressData.McDataType.DataCode;                             // 指明写入的数据
            command[8] = (byte)(value.Length / 2 % 256);                              // 软元件长度的地位
            command[9] = (byte)(value.Length / 2 / 256);
            value.CopyTo(command, 10);

            return command;
        }

        /// <summary>
        /// 以字为单位，创建ASCII数据写入的核心报文
        /// </summary>
        /// <param name="addressData">三菱Mc协议的数据地址</param>
        /// <param name="value">实际的原始数据信息</param>
        /// <returns>带有成功标识的报文对象</returns>
        public static byte[] BuildAsciiWriteWordCoreCommand(McAddressData addressData, byte[] value)
        {
            if (value == null) value = new byte[0];
            byte[] buffer = new byte[value.Length * 2];
            for (int i = 0; i < value.Length / 2; i++)
            {
                SoftBasic.BuildAsciiBytesFrom(BitConverter.ToUInt16(value, i * 2)).CopyTo(buffer, 4 * i);
            }
            value = buffer;

            byte[] command = new byte[20 + value.Length];
            command[0] = 0x31;                                                                                          // 批量写入的命令
            command[1] = 0x34;
            command[2] = 0x30;
            command[3] = 0x31;
            command[4] = 0x30;                                                                                          // 子命令
            command[5] = 0x30;
            command[6] = 0x30;
            command[7] = 0x30;
            command[8] = Encoding.ASCII.GetBytes(addressData.McDataType.AsciiCode)[0];                                // 软元件类型
            command[9] = Encoding.ASCII.GetBytes(addressData.McDataType.AsciiCode)[1];
            command[10] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[0];     // 起始地址的地位
            command[11] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[1];
            command[12] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[2];
            command[13] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[3];
            command[14] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[4];
            command[15] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[5];
            command[16] = SoftBasic.BuildAsciiBytesFrom((ushort)(value.Length / 4))[0];                              // 软元件点数
            command[17] = SoftBasic.BuildAsciiBytesFrom((ushort)(value.Length / 4))[1];
            command[18] = SoftBasic.BuildAsciiBytesFrom((ushort)(value.Length / 4))[2];
            command[19] = SoftBasic.BuildAsciiBytesFrom((ushort)(value.Length / 4))[3];
            value.CopyTo(command, 20);

            return command;
        }

        /// <summary>
        /// 以位为单位，创建数据写入的核心报文
        /// </summary>
        /// <param name="addressData">三菱Mc协议的数据地址</param>
        /// <param name="value">原始的bool数组数据</param>
        /// <returns>带有成功标识的报文对象</returns>
        public static byte[] BuildWriteBitCoreCommand(McAddressData addressData, bool[] value)
        {
            if (value == null) value = new bool[0];
            byte[] buffer = TransBoolArrayToByteData(value);
            byte[] command = new byte[10 + buffer.Length];
            command[0] = 0x01;                                                        // 批量写入数据命令
            command[1] = 0x14;
            command[2] = 0x01;                                                        // 以位为单位成批写入
            command[3] = 0x00;
            command[4] = BitConverter.GetBytes(addressData.AddressStart)[0];        // 起始地址的地位
            command[5] = BitConverter.GetBytes(addressData.AddressStart)[1];
            command[6] = BitConverter.GetBytes(addressData.AddressStart)[2];
            command[7] = addressData.McDataType.DataCode;                             // 指明写入的数据
            command[8] = (byte)(value.Length % 256);                                  // 软元件长度的地位
            command[9] = (byte)(value.Length / 256);
            buffer.CopyTo(command, 10);

            return command;
        }

        /// <summary>
        /// 以位为单位，创建ASCII数据写入的核心报文
        /// </summary>
        /// <param name="addressData">三菱Mc协议的数据地址</param>
        /// <param name="value">原始的bool数组数据</param>
        /// <returns>带有成功标识的报文对象</returns>
        public static byte[] BuildAsciiWriteBitCoreCommand(McAddressData addressData, bool[] value)
        {
            if (value == null) value = new bool[0];
            byte[] buffer = value.Select(m => m ? (byte)0x31 : (byte)0x30).ToArray();

            byte[] command = new byte[20 + buffer.Length];
            command[0] = 0x31;                                                                              // 批量写入的命令
            command[1] = 0x34;
            command[2] = 0x30;
            command[3] = 0x31;
            command[4] = 0x30;                                                                              // 子命令
            command[5] = 0x30;
            command[6] = 0x30;
            command[7] = 0x31;
            command[8] = Encoding.ASCII.GetBytes(addressData.McDataType.AsciiCode)[0];                         // 软元件类型
            command[9] = Encoding.ASCII.GetBytes(addressData.McDataType.AsciiCode)[1];
            command[10] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[0];     // 起始地址的地位
            command[11] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[1];
            command[12] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[2];
            command[13] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[3];
            command[14] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[4];
            command[15] = BuildBytesFromAddress(addressData.AddressStart, addressData.McDataType)[5];
            command[16] = SoftBasic.BuildAsciiBytesFrom((ushort)(value.Length))[0];              // 软元件点数
            command[17] = SoftBasic.BuildAsciiBytesFrom((ushort)(value.Length))[1];
            command[18] = SoftBasic.BuildAsciiBytesFrom((ushort)(value.Length))[2];
            command[19] = SoftBasic.BuildAsciiBytesFrom((ushort)(value.Length))[3];
            buffer.CopyTo(command, 20);

            return command;
        }

        #endregion

        #region Common Logic

        /// <summary>
        /// 从三菱的地址中构建MC协议的6字节的ASCII格式的地址
        /// </summary>
        /// <param name="address">三菱地址</param>
        /// <param name="type">三菱的数据类型</param>
        /// <returns>6字节的ASCII格式的地址</returns>
        internal static byte[] BuildBytesFromAddress(int address, MelsecMcDataType type)
        {
            return Encoding.ASCII.GetBytes(address.ToString(type.FromBase == 10 ? "D6" : "X6"));
        }

        /// <summary>
        /// 将0，1，0，1的字节数组压缩成三菱格式的字节数组来表示开关量的
        /// </summary>
        /// <param name="value">原始的数据字节</param>
        /// <returns>压缩过后的数据字节</returns>
        internal static byte[] TransBoolArrayToByteData(byte[] value)
        {
            int length = (value.Length + 1) / 2;
            byte[] buffer = new byte[length];

            for (int i = 0; i < length; i++)
            {
                if (value[i * 2 + 0] != 0x00) buffer[i] += 0x10;
                if ((i * 2 + 1) < value.Length)
                {
                    if (value[i * 2 + 1] != 0x00) buffer[i] += 0x01;
                }
            }

            return buffer;
        }

        /// <summary>
        /// 将bool的组压缩成三菱格式的字节数组来表示开关量的
        /// </summary>
        /// <param name="value">原始的数据字节</param>
        /// <returns>压缩过后的数据字节</returns>
        internal static byte[] TransBoolArrayToByteData(bool[] value)
        {
            int length = (value.Length + 1) / 2;
            byte[] buffer = new byte[length];

            for (int i = 0; i < length; i++)
            {
                if (value[i * 2 + 0]) buffer[i] += 0x10;
                if ((i * 2 + 1) < value.Length)
                {
                    if (value[i * 2 + 1]) buffer[i] += 0x01;
                }
            }

            return buffer;
        }

        #endregion

        #region CRC Check

        /// <summary>
        /// 计算Fx协议指令的和校验信息
        /// </summary>
        /// <param name="data">字节数据</param>
        /// <returns>校验之后的数据</returns>
        internal static byte[] FxCalculateCRC(byte[] data)
        {
            int sum = 0;
            for (int i = 1; i < data.Length - 2; i++)
            {
                sum += data[i];
            }
            return SoftBasic.BuildAsciiBytesFrom((byte)sum);
        }

        /// <summary>
        /// 检查指定的和校验是否是正确的
        /// </summary>
        /// <param name="data">字节数据</param>
        /// <returns>是否成功</returns>
        internal static bool CheckCRC(byte[] data)
        {
            byte[] crc = FxCalculateCRC(data);
            if (crc[0] != data[data.Length - 2]) return false;
            if (crc[1] != data[^1]) return false;
            return true;
        }

        #endregion
    }
}
