using SWRIS.Enums;
using System;
using System.Text;

namespace SWRIS.Extensions
{
    public class ByteTransform
    {
        #region Constructor

        /// <summary>
        /// 实例化一个默认的对象<br />
        /// Instantiate a default object
        /// </summary>
        public ByteTransform()
        {
            DataFormat = DataFormat.ABCD;
        }

        /// <summary>
        /// 使用指定的数据解析来实例化对象<br />
        /// Instantiate the object using the specified data parsing
        /// </summary>
        /// <param name="dataFormat">数据规则</param>
        public ByteTransform(DataFormat dataFormat)
        {
            this.DataFormat = dataFormat;
        }

        #endregion

        #region Get Value From Bytes

        /// <inheritdoc cref="IByteTransform.TransBool(byte[], int)"/>
        public virtual bool TransBool(byte[] buffer, int index) => GetBoolByIndex(buffer, index);

        /// <inheritdoc cref="IByteTransform.TransBool(byte[], int, int)"/>
        public virtual bool[] TransBool(byte[] buffer, int index, int length)
        {
            bool[] result = new bool[length];
            for (int i = 0; i < length; i++)
            {
                result[i] = GetBoolByIndex(buffer, i + index);
            }
            return result;
        }
        /// <summary>
        /// 获取Byte数组的第 boolIndex 偏移的bool值，这个偏移值可以为 10，就是第 1 个字节的 第3位 <br />
        /// Get the bool value of the boolIndex offset of the Byte array. The offset value can be 10, which is the third bit of the first byte
        /// </summary>
        /// <param name="bytes">字节数组信息</param>
        /// <param name="boolIndex">指定字节的位偏移</param>
        /// <returns>bool值</returns>
        public static bool GetBoolByIndex(byte[] bytes, int boolIndex)
        {
            return SoftBasic.BoolOnByteIndex(bytes[boolIndex / 8], boolIndex % 8);
        }
        /// <inheritdoc cref="IByteTransform.TransByte(byte[], int)"/>
        public virtual byte TransByte(byte[] buffer, int index) => buffer[index];

        /// <inheritdoc cref="IByteTransform.TransByte(byte[], int, int)"/>
        public virtual byte[] TransByte(byte[] buffer, int index, int length)
        {
            byte[] tmp = new byte[length];
            Array.Copy(buffer, index, tmp, 0, length);
            return tmp;
        }

        /// <inheritdoc cref="IByteTransform.TransInt16(byte[], int)"/>
        public virtual short TransInt16(byte[] buffer, int index) => BitConverter.ToInt16(ByteTransDataFormat2(buffer, index), 0);

        /// <inheritdoc cref="IByteTransform.TransInt16(byte[], int, int)"/>
        public virtual short[] TransInt16(byte[] buffer, int index, int length)
        {
            short[] tmp = new short[length];
            for (int i = 0; i < length; i++)
            {
                tmp[i] = TransInt16(buffer, index + 2 * i);
            }
            return tmp;
        }

        /// <inheritdoc cref="IByteTransform.TransInt16(byte[], int, int, int)"/>
        public short[,] TransInt16(byte[] buffer, int index, int row, int col)
        {
            return CreateTwoArrayFromOneArray(TransInt16(buffer, index, row * col), row, col);
        }

        /// <inheritdoc cref="IByteTransform.TransUInt16(byte[], int)"/>
        public virtual ushort TransUInt16(byte[] buffer, int index) => BitConverter.ToUInt16(ByteTransDataFormat2(buffer, index), 0);

        /// <inheritdoc cref="IByteTransform.TransUInt16(byte[], int, int)"/>
        public virtual ushort[] TransUInt16(byte[] buffer, int index, int length)
        {
            ushort[] tmp = new ushort[length];
            for (int i = 0; i < length; i++)
            {
                tmp[i] = TransUInt16(buffer, index + 2 * i);
            }
            return tmp;
        }

        /// <inheritdoc cref="IByteTransform.TransUInt16(byte[], int, int, int)"/>
        public ushort[,] TransUInt16(byte[] buffer, int index, int row, int col)
        {
            return CreateTwoArrayFromOneArray(TransUInt16(buffer, index, row * col), row, col);
        }

        /// <inheritdoc cref="IByteTransform.TransInt32(byte[], int)"/>
        public virtual int TransInt32(byte[] buffer, int index) => BitConverter.ToInt32(ByteTransDataFormat4(buffer, index), 0);

        /// <inheritdoc cref="IByteTransform.TransInt32(byte[], int, int)"/>
        public virtual int[] TransInt32(byte[] buffer, int index, int length)
        {
            int[] tmp = new int[length];
            for (int i = 0; i < length; i++)
            {
                tmp[i] = TransInt32(buffer, index + 4 * i);
            }
            return tmp;
        }

        /// <inheritdoc cref="IByteTransform.TransInt32(byte[], int, int, int)"/>
        public int[,] TransInt32(byte[] buffer, int index, int row, int col)
        {
            return CreateTwoArrayFromOneArray(TransInt32(buffer, index, row * col), row, col);
        }

        /// <inheritdoc cref="IByteTransform.TransUInt32(byte[], int)"/>
        public virtual uint TransUInt32(byte[] buffer, int index) => BitConverter.ToUInt32(ByteTransDataFormat4(buffer, index), 0);

        /// <inheritdoc cref="IByteTransform.TransUInt32(byte[], int, int)"/>
        public virtual uint[] TransUInt32(byte[] buffer, int index, int length)
        {
            uint[] tmp = new uint[length];
            for (int i = 0; i < length; i++)
            {
                tmp[i] = TransUInt32(buffer, index + 4 * i);
            }
            return tmp;
        }

        /// <inheritdoc cref="IByteTransform.TransUInt32(byte[], int, int, int)"/>
        public uint[,] TransUInt32(byte[] buffer, int index, int row, int col)
        {
            return CreateTwoArrayFromOneArray(TransUInt32(buffer, index, row * col), row, col);
        }


        /// <inheritdoc cref="IByteTransform.TransInt64(byte[], int)"/>
        public virtual long TransInt64(byte[] buffer, int index) => BitConverter.ToInt64(ByteTransDataFormat8(buffer, index), 0);

        /// <inheritdoc cref="IByteTransform.TransInt64(byte[], int, int)"/>
        public virtual long[] TransInt64(byte[] buffer, int index, int length)
        {
            long[] tmp = new long[length];
            for (int i = 0; i < length; i++)
            {
                tmp[i] = TransInt64(buffer, index + 8 * i);
            }
            return tmp;
        }

        /// <inheritdoc cref="IByteTransform.TransInt64(byte[], int, int, int)"/>
        public long[,] TransInt64(byte[] buffer, int index, int row, int col)
        {
            return CreateTwoArrayFromOneArray(TransInt64(buffer, index, row * col), row, col);
        }

        /// <inheritdoc cref="IByteTransform.TransUInt64(byte[], int)"/>
        public virtual ulong TransUInt64(byte[] buffer, int index) => BitConverter.ToUInt64(ByteTransDataFormat8(buffer, index), 0);

        /// <inheritdoc cref="IByteTransform.TransUInt64(byte[], int, int)"/>
        public virtual ulong[] TransUInt64(byte[] buffer, int index, int length)
        {
            ulong[] tmp = new ulong[length];
            for (int i = 0; i < length; i++)
            {
                tmp[i] = TransUInt64(buffer, index + 8 * i);
            }
            return tmp;
        }

        /// <inheritdoc cref="IByteTransform.TransUInt64(byte[], int, int, int)"/>
        public ulong[,] TransUInt64(byte[] buffer, int index, int row, int col)
        {
            return CreateTwoArrayFromOneArray(TransUInt64(buffer, index, row * col), row, col);
        }

        /// <inheritdoc cref="IByteTransform.TransSingle(byte[], int)"/>
        public virtual float TransSingle(byte[] buffer, int index) => BitConverter.ToSingle(ByteTransDataFormat4(buffer, index), 0);

        /// <inheritdoc cref="IByteTransform.TransSingle(byte[], int, int)"/>
        public virtual float[] TransSingle(byte[] buffer, int index, int length)
        {
            float[] tmp = new float[length];
            for (int i = 0; i < length; i++)
            {
                tmp[i] = TransSingle(buffer, index + 4 * i);
            }
            return tmp;
        }

        /// <inheritdoc cref="IByteTransform.TransSingle(byte[], int, int, int)"/>
        public float[,] TransSingle(byte[] buffer, int index, int row, int col)
        {
            return CreateTwoArrayFromOneArray(TransSingle(buffer, index, row * col), row, col);
        }

        /// <inheritdoc cref="IByteTransform.TransDouble(byte[], int)"/>
        public virtual double TransDouble(byte[] buffer, int index) => BitConverter.ToDouble(ByteTransDataFormat8(buffer, index), 0);

        /// <inheritdoc cref="IByteTransform.TransDouble(byte[], int, int)"/>
        public virtual double[] TransDouble(byte[] buffer, int index, int length)
        {
            double[] tmp = new double[length];
            for (int i = 0; i < length; i++)
            {
                tmp[i] = TransDouble(buffer, index + 8 * i);
            }
            return tmp;
        }

        /// <inheritdoc cref="IByteTransform.TransDouble(byte[], int, int, int)"/>
        public double[,] TransDouble(byte[] buffer, int index, int row, int col)
        {
            return CreateTwoArrayFromOneArray(TransDouble(buffer, index, row * col), row, col);
        }

        /// <inheritdoc cref="IByteTransform.TransString(byte[], int, int, Encoding)"/>
        public virtual string TransString(byte[] buffer, int index, int length, Encoding encoding)
        {
            byte[] tmp = TransByte(buffer, index, length);
            if (IsStringReverseByteWord)
                return encoding.GetString(SoftBasic.BytesReverseByWord(tmp));
            else
                return encoding.GetString(tmp);
        }

        /// <summary>
        /// 将一个一维数组中的所有数据按照行列信息拷贝到二维数组里，返回当前的二维数组
        /// </summary>
        /// <typeparam name="T">数组的类型对象</typeparam>
        /// <param name="array">一维数组信息</param>
        /// <param name="row">行</param>
        /// <param name="col">列</param>
        public static T[,] CreateTwoArrayFromOneArray<T>(T[] array, int row, int col)
        {
            T[,] twoArray = new T[row, col];
            int count = 0;
            for (int i = 0; i < row; i++)
            {
                for (int j = 0; j < col; j++)
                {
                    twoArray[i, j] = array[count];
                    count++;
                }
            }
            return twoArray;
        }
        /// <inheritdoc cref="IByteTransform.TransString(byte[], Encoding)"/>
        public virtual string TransString(byte[] buffer, Encoding encoding) => encoding.GetString(buffer);

        #endregion

        #region Get Bytes From Value

        /// <inheritdoc cref="IByteTransform.TransByte(bool)"/>
        public virtual byte[] TransByte(bool value) => TransByte(new bool[] { value });

        /// <inheritdoc cref="IByteTransform.TransByte(bool[])"/>
        public virtual byte[] TransByte(bool[] values) => values == null ? null : SoftBasic.BoolArrayToByte(values);

        /// <inheritdoc cref="IByteTransform.TransByte(byte)"/>
        public virtual byte[] TransByte(byte value) => new byte[] { value };

        /// <inheritdoc cref="IByteTransform.TransByte(short)"/>
        public virtual byte[] TransByte(short value) => TransByte(new short[] { value });

        /// <inheritdoc cref="IByteTransform.TransByte(short[])"/>
        public virtual byte[] TransByte(short[] values)
        {
            if (values == null) return null;
            byte[] buffer = new byte[values.Length * 2];
            for (int i = 0; i < values.Length; i++)
            {
                ByteTransDataFormat2(BitConverter.GetBytes(values[i])).CopyTo(buffer, 2 * i);
            }
            return buffer;
        }

        /// <inheritdoc cref="IByteTransform.TransByte(ushort)"/>
        public virtual byte[] TransByte(ushort value) => TransByte(new ushort[] { value });

        /// <inheritdoc cref="IByteTransform.TransByte(ushort[])"/>
        public virtual byte[] TransByte(ushort[] values)
        {
            if (values == null) return null;

            byte[] buffer = new byte[values.Length * 2];
            for (int i = 0; i < values.Length; i++)
            {
                ByteTransDataFormat2(BitConverter.GetBytes(values[i])).CopyTo(buffer, 2 * i);
            }

            return buffer;
        }

        /// <inheritdoc cref="IByteTransform.TransByte(int)"/>
        public virtual byte[] TransByte(int value) => TransByte(new int[] { value });

        /// <inheritdoc cref="IByteTransform.TransByte(int[])"/>
        public virtual byte[] TransByte(int[] values)
        {
            if (values == null) return null;

            byte[] buffer = new byte[values.Length * 4];
            for (int i = 0; i < values.Length; i++)
            {
                ByteTransDataFormat4(BitConverter.GetBytes(values[i])).CopyTo(buffer, 4 * i);
            }

            return buffer;
        }

        /// <inheritdoc cref="IByteTransform.TransByte(uint)"/>
        public virtual byte[] TransByte(uint value) => TransByte(new uint[] { value });

        /// <inheritdoc cref="IByteTransform.TransByte(uint[])"/>
        public virtual byte[] TransByte(uint[] values)
        {
            if (values == null) return null;

            byte[] buffer = new byte[values.Length * 4];
            for (int i = 0; i < values.Length; i++)
            {
                ByteTransDataFormat4(BitConverter.GetBytes(values[i])).CopyTo(buffer, 4 * i);
            }

            return buffer;
        }

        /// <inheritdoc cref="IByteTransform.TransByte(long)"/>
        public virtual byte[] TransByte(long value) => TransByte(new long[] { value });

        /// <inheritdoc cref="IByteTransform.TransByte(long[])"/>
        public virtual byte[] TransByte(long[] values)
        {
            if (values == null) return null;

            byte[] buffer = new byte[values.Length * 8];
            for (int i = 0; i < values.Length; i++)
            {
                ByteTransDataFormat8(BitConverter.GetBytes(values[i])).CopyTo(buffer, 8 * i);
            }

            return buffer;
        }

        /// <inheritdoc cref="IByteTransform.TransByte(ulong)"/>
        public virtual byte[] TransByte(ulong value) => TransByte(new ulong[] { value });

        /// <inheritdoc cref="IByteTransform.TransByte(ulong[])"/>
        public virtual byte[] TransByte(ulong[] values)
        {
            if (values == null) return null;

            byte[] buffer = new byte[values.Length * 8];
            for (int i = 0; i < values.Length; i++)
            {
                ByteTransDataFormat8(BitConverter.GetBytes(values[i])).CopyTo(buffer, 8 * i);
            }

            return buffer;
        }

        /// <inheritdoc cref="IByteTransform.TransByte(float)"/>
        public virtual byte[] TransByte(float value) => TransByte(new float[] { value });

        /// <inheritdoc cref="IByteTransform.TransByte(float[])"/>
        public virtual byte[] TransByte(float[] values)
        {
            if (values == null) return null;

            byte[] buffer = new byte[values.Length * 4];
            for (int i = 0; i < values.Length; i++)
            {
                ByteTransDataFormat4(BitConverter.GetBytes(values[i])).CopyTo(buffer, 4 * i);
            }

            return buffer;
        }

        /// <inheritdoc cref="IByteTransform.TransByte(double)"/>
        public virtual byte[] TransByte(double value) => TransByte(new double[] { value });

        /// <inheritdoc cref="IByteTransform.TransByte(double[])"/>
        public virtual byte[] TransByte(double[] values)
        {
            if (values == null) return null;

            byte[] buffer = new byte[values.Length * 8];
            for (int i = 0; i < values.Length; i++)
            {
                ByteTransDataFormat8(BitConverter.GetBytes(values[i])).CopyTo(buffer, 8 * i);
            }

            return buffer;
        }

        /// <inheritdoc cref="IByteTransform.TransByte(string, Encoding)"/>
        public virtual byte[] TransByte(string value, Encoding encoding)
        {
            if (value == null) return null;
            byte[] buffer = encoding.GetBytes(value);
            return IsStringReverseByteWord ? SoftBasic.BytesReverseByWord(buffer) : buffer;
        }

        /// <inheritdoc cref="IByteTransform.TransByte(string, int, Encoding)"/>
        public virtual byte[] TransByte(string value, int length, Encoding encoding)
        {
            if (value == null) return null;
            byte[] buffer = encoding.GetBytes(value);
            return IsStringReverseByteWord ? SoftBasic.ArrayExpandToLength(SoftBasic.BytesReverseByWord(buffer), length) : SoftBasic.ArrayExpandToLength(buffer, length);
        }

        #endregion

        #region DataFormat Support

        /// <summary>
        /// 反转两个字节的数据信息
        /// </summary>
        /// <param name="value">原始字节数据</param>
        /// <param name="index">起始的索引</param>
        /// <returns>反转后的字节</returns>
        protected virtual byte[] ByteTransDataFormat2(byte[] value, int index = 0)
        {
            byte[] buffer = new byte[2];
            switch (DataFormat)
            {
                case DataFormat.ABCD:
                case DataFormat.CDAB:
                    {
                        buffer[0] = value[index + 1];
                        buffer[1] = value[index + 0];
                        break;
                    }
                case DataFormat.BADC:
                case DataFormat.DCBA:
                    {
                        buffer[0] = value[index + 0];
                        buffer[1] = value[index + 1];
                        break;
                    }
            }
            return buffer;
        }

        /// <summary>
        /// 反转多字节的数据信息
        /// </summary>
        /// <param name="value">数据字节</param>
        /// <param name="index">起始索引，默认值为0</param>
        /// <returns>实际字节信息</returns>
        protected virtual byte[] ByteTransDataFormat4(byte[] value, int index = 0)
        {
            byte[] buffer = new byte[4];
            switch (DataFormat)
            {
                case DataFormat.ABCD:
                    {
                        buffer[0] = value[index + 3];
                        buffer[1] = value[index + 2];
                        buffer[2] = value[index + 1];
                        buffer[3] = value[index + 0];
                        break;
                    }
                case DataFormat.BADC:
                    {
                        buffer[0] = value[index + 2];
                        buffer[1] = value[index + 3];
                        buffer[2] = value[index + 0];
                        buffer[3] = value[index + 1];
                        break;
                    }

                case DataFormat.CDAB:
                    {
                        buffer[0] = value[index + 1];
                        buffer[1] = value[index + 0];
                        buffer[2] = value[index + 3];
                        buffer[3] = value[index + 2];
                        break;
                    }
                case DataFormat.DCBA:
                    {
                        buffer[0] = value[index + 0];
                        buffer[1] = value[index + 1];
                        buffer[2] = value[index + 2];
                        buffer[3] = value[index + 3];
                        break;
                    }
            }
            return buffer;
        }


        /// <summary>
        /// 反转多字节的数据信息
        /// </summary>
        /// <param name="value">数据字节</param>
        /// <param name="index">起始索引，默认值为0</param>
        /// <returns>实际字节信息</returns>
        protected virtual byte[] ByteTransDataFormat8(byte[] value, int index = 0)
        {
            byte[] buffer = new byte[8];
            switch (DataFormat)
            {
                case DataFormat.ABCD:
                    {
                        buffer[0] = value[index + 7];
                        buffer[1] = value[index + 6];
                        buffer[2] = value[index + 5];
                        buffer[3] = value[index + 4];
                        buffer[4] = value[index + 3];
                        buffer[5] = value[index + 2];
                        buffer[6] = value[index + 1];
                        buffer[7] = value[index + 0];
                        break;
                    }
                case DataFormat.BADC:
                    {
                        buffer[0] = value[index + 6];
                        buffer[1] = value[index + 7];
                        buffer[2] = value[index + 4];
                        buffer[3] = value[index + 5];
                        buffer[4] = value[index + 2];
                        buffer[5] = value[index + 3];
                        buffer[6] = value[index + 0];
                        buffer[7] = value[index + 1];
                        break;
                    }

                case DataFormat.CDAB:
                    {
                        buffer[0] = value[index + 1];
                        buffer[1] = value[index + 0];
                        buffer[2] = value[index + 3];
                        buffer[3] = value[index + 2];
                        buffer[4] = value[index + 5];
                        buffer[5] = value[index + 4];
                        buffer[6] = value[index + 7];
                        buffer[7] = value[index + 6];
                        break;
                    }
                case DataFormat.DCBA:
                    {
                        buffer[0] = value[index + 0];
                        buffer[1] = value[index + 1];
                        buffer[2] = value[index + 2];
                        buffer[3] = value[index + 3];
                        buffer[4] = value[index + 4];
                        buffer[5] = value[index + 5];
                        buffer[6] = value[index + 6];
                        buffer[7] = value[index + 7];
                        break;
                    }
            }
            return buffer;
        }
        #endregion

        #region Public Properties

        /// <inheritdoc cref="IByteTransform.DataFormat"/>
        public DataFormat DataFormat { get; set; }

        /// <inheritdoc cref="IByteTransform.IsStringReverseByteWord"/>
        public bool IsStringReverseByteWord { get; set; }

        #endregion

        #region Object Override

        /// <inheritdoc/>
        public override string ToString() => $"RegularByteTransform[{DataFormat}]";

        #endregion
    }
}