using System.Collections;
using DotNext;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Formats.Jpeg;
using SixLabors.ImageSharp.PixelFormats;
using System.Text;

namespace Common
{
    /// <summary>
    /// 数字处理工具
    /// </summary>
    public class Number
    {
        private static readonly byte[] BitReverseTable = new byte[] {
            0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
            0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
            0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
            0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
            0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
            0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
            0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
            0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
            0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
            0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
            0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
            0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
            0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
            0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
            0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
            0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
            0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
            0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
            0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
            0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
            0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
            0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
            0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
            0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
            0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
            0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
            0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
            0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
            0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
            0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
            0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
            0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
        };

        /// <summary>
        /// 整数转成二进制字节数组
        /// </summary>
        /// <param name="num">整数</param>
        /// <param name="length">整数长度</param>
        /// <param name="isLowNumHigh">是否高位在数组索引低</param>
        /// <returns>二进制字节数组</returns>
        public static Result<byte[]> NumberToBytes(ulong num, uint length, bool isLowNumHigh = false)
        {
            if (length > 8)
            {
                return new(new ArgumentException(
                    "Unsigned long number can't over 8 bytes(64 bits).",
                    nameof(length)
                ));
            }

            var arr = new byte[length];

            if (isLowNumHigh)
            {
                for (var i = 0; i < length; i++)
                {
                    arr[length - 1 - i] = Convert.ToByte((num >> (i << 3)) & (0xFF));
                }
            }
            else
            {
                for (var i = 0; i < length; i++)
                {
                    arr[i] = Convert.ToByte((num >> ((int)(length - 1 - i) << 3)) & (0xFF));
                }
            }
            return arr;
        }

        /// <summary>
        /// 二进制字节数组转成64bits整数
        /// </summary>
        /// <param name="bytes">二进制字节数组</param>
        /// <param name="isLowNumHigh">是否高位在数组索引低</param>
        /// <returns>整数</returns>
        public static Result<UInt64> BytesToUInt64(byte[] bytes, bool isLowNumHigh = false)
        {
            if (bytes.Length > 8)
            {
                return new(new ArgumentException(
                    "Unsigned long number can't over 8 bytes(64 bits).",
                    nameof(bytes)
                ));
            }

            UInt64 num = 0;
            int len = bytes.Length;

            try
            {
                if (isLowNumHigh)
                {
                    for (var i = 0; i < len; i++)
                    {
                        num += Convert.ToUInt64((UInt64)bytes[len - 1 - i] << (i << 3));
                    }
                }
                else
                {
                    for (var i = 0; i < len; i++)
                    {
                        num += Convert.ToUInt64((UInt64)bytes[i] << ((int)(len - 1 - i) << 3));
                    }
                }

                return num;
            }
            catch (Exception error)
            {
                return new(error);
            }
        }

        /// <summary>
        /// 二进制字节数组转成32bits整数
        /// </summary>
        /// <param name="bytes">二进制字节数组</param>
        /// <param name="isLowNumHigh">是否高位在数组索引低</param>
        /// <returns>整数</returns>
        public static Result<UInt32> BytesToUInt32(byte[] bytes, bool isLowNumHigh = false)
        {
            if (bytes.Length > 4)
            {
                return new(new ArgumentException(
                    "Unsigned long number can't over 4 bytes(32 bits).",
                    nameof(bytes)
                ));
            }

            UInt32 num = 0;
            int len = bytes.Length;

            try
            {
                if (isLowNumHigh)
                {
                    for (var i = 0; i < len; i++)
                    {
                        num += Convert.ToUInt32((UInt32)bytes[len - 1 - i] << (i << 3));
                    }
                }
                else
                {
                    for (var i = 0; i < len; i++)
                    {
                        num += Convert.ToUInt32((UInt32)bytes[i] << ((int)(len - 1 - i) << 3));
                    }
                }

                return num;
            }
            catch (Exception error)
            {
                return new(error);
            }

        }

        /// <summary>
        /// [TODO:description]
        /// </summary>
        /// <param name="uintArray">[TODO:parameter]</param>
        /// <returns>[TODO:return]</returns>
        public static Result<byte[]> UInt32ArrayToBytes(UInt32[] uintArray)
        {
            byte[] byteArray = new byte[uintArray.Length * 4];
            try
            {
                Buffer.BlockCopy(uintArray, 0, byteArray, 0, uintArray.Length * 4);
                return byteArray;
            }
            catch (Exception error)
            {
                return new(error);
            }
        }



        /// <summary>
        /// 比特合并成二进制字节
        /// </summary>
        /// <param name="bits1">第一个比特值</param>
        /// <param name="bits1Len">第一个比特值的长度（位数）</param>
        /// <param name="bits2">第二个比特值</param>
        /// <param name="bits2Len">第二个比特值的长度（位数）</param>
        /// <returns>合并后的二进制字节数组</returns>
        public static Result<byte[]> MultiBitsToBytes(ulong bits1, uint bits1Len, ulong bits2, uint bits2Len)
        {
            return NumberToBytes(MultiBitsToNumber(bits1, bits1Len, bits2, bits2Len).Value,
                        (bits1Len + bits2Len) % 8 != 0 ? (bits1Len + bits2Len) / 8 + 1 : (bits1Len + bits2Len) / 8);
        }

        /// <summary>
        /// 比特合并成整型
        /// </summary>
        /// <param name="bits1">第一个比特值</param>
        /// <param name="bits1Len">第一个比特值的长度（位数）</param>
        /// <param name="bits2">第二个比特值</param>
        /// <param name="bits2Len">第二个比特值的长度（位数）</param>
        /// <returns>合并后的整型值</returns>
        public static Result<ulong> MultiBitsToNumber(ulong bits1, uint bits1Len, ulong bits2, uint bits2Len)
        {
            if (bits1Len + bits2Len > 64) return new(new ArgumentException("Two Bits is more than 64 bits"));

            ulong num = (bits1 << Convert.ToInt32(bits2Len)) | bits2;
            return num;
        }

        /// <summary>
        /// 比特合并成整型
        /// </summary>
        /// <param name="bits1">第一个比特值</param>
        /// <param name="bits1Len">第一个比特值的长度（位数）</param>
        /// <param name="bits2">第二个比特值</param>
        /// <param name="bits2Len">第二个比特值的长度（位数）</param>
        /// <returns>合并后的整型值</returns>
        public static Result<uint> MultiBitsToNumber(uint bits1, uint bits1Len, uint bits2, uint bits2Len)
        {
            if (bits1Len + bits2Len > 64) return new(new ArgumentException("Two Bits is more than 64 bits"));

            uint num = (bits1 << Convert.ToInt32(bits2Len)) | bits2;
            return num;
        }

        /// <summary>
        /// 比特位检查
        /// </summary>
        /// <param name="srcBits">源比特值</param>
        /// <param name="dstBits">目标比特值</param>
        /// <param name="mask">掩码（默认为全1）</param>
        /// <returns>检查结果（是否匹配）</returns>
        public static bool BitsCheck(ulong srcBits, ulong dstBits, ulong mask = 0xFFFF_FFFF_FFFF_FFFF)
        {
            return (srcBits & mask) == dstBits;
        }

        /// <summary>
        /// 比特位检查
        /// </summary>
        /// <param name="srcBits">源比特值</param>
        /// <param name="dstBits">目标比特值</param>
        /// <param name="mask">掩码（默认为全1）</param>
        /// <returns>检查结果（是否匹配）</returns>
        public static bool BitsCheck(uint srcBits, uint dstBits, uint mask = 0xFFFF_FFFF)
        {
            return (srcBits & mask) == dstBits;
        }

        /// <summary>
        /// 获取整型对应位置的比特
        /// </summary>
        /// <param name="srcBits">整型数字</param>
        /// <param name="location">位置</param>
        /// <returns>比特</returns>
        public static Result<bool> ToBit(UInt32 srcBits, int location)
        {
            if (location < 0)
                return new(new ArgumentException(
                    "Location can't be negetive", nameof(location)));

            return ((srcBits >> location) & ((UInt32)0b1)) == 1;
        }

        /// <summary>
        /// 将BitArray转化为32bits无符号整型
        /// </summary>
        /// <param name="bits">BitArray比特数组</param>
        /// <returns>32bits无符号整型</returns>
        public static Result<UInt32> BitsToNumber(BitArray bits)
        {
            if (bits.Length > 32)
                throw new ArgumentException("Argument length shall be at most 32 bits.");

            var array = new UInt32[1];
            bits.CopyTo(array, 0);
            return array[0];
        }


        /// <summary>
        /// 字符串转二进制字节数组
        /// </summary>
        /// <param name="str">输入的字符串</param>
        /// <param name="numBase">进制（默认为16进制）</param>
        /// <returns>转换后的二进制字节数组</returns>
        public static byte[] StringToBytes(string str, int numBase = 16)
        {
            var len = str.Length;
            var bytesLen = len / 2;
            var bytes = new byte[bytesLen];

            for (var i = 0; i < bytesLen; i++)
            {
                bytes[i] = Convert.ToByte(str.Substring(i * 2, 2), 16);
            }

            return bytes;
        }

        /// <summary>
        /// 反转字节数组中的子数组
        /// </summary>
        /// <param name="srcBytes">源字节数组</param>
        /// <param name="distance">子数组的长度（反转的步长）</param>
        /// <returns>反转后的字节数组</returns>
        public static Result<byte[]> ReverseBytes(byte[] srcBytes, int distance)
        {
            if (distance <= 0)
                return new(new ArgumentException("Distance can't be negetive", nameof(distance)));

            var srcBytesLen = srcBytes.Length;
            if (distance > srcBytesLen)
                return new(new ArgumentException(
                    "Distance is larger than bytesArray", nameof(distance)));
            if (srcBytesLen % distance != 0)
                return new(new ArgumentException(
                    "The length of bytes can't be divided by distance without reminder", nameof(distance)));

            var dstBytes = new byte[srcBytesLen];
            var buffer = new byte[distance];

            for (int i = 0; i < srcBytesLen; i += distance)
            {
                var end = i + distance;
                buffer = srcBytes[i..end];
                Array.Reverse(buffer);
                Array.Copy(buffer, 0, dstBytes, i, distance);
            }

            return dstBytes;
        }

        /// <summary>
        /// 反转字节内比特顺序（使用查找表的方法）
        /// </summary>
        /// <param name="srcByte">字节</param>
        /// <returns>反转后的字节</returns>
        public static byte ReverseBits(byte srcByte)
        {
            return BitReverseTable[srcByte];
        }

        /// <summary>
        /// 反转字节数组的字节内比特顺序（使用查找表的方法）
        /// </summary>
        /// <param name="srcBytes">字节数组</param>
        /// <returns>反转后的字节字节数组</returns>
        public static byte[] ReverseBits(byte[] srcBytes)
        {
            var bytesLen = srcBytes.Length;
            var dstBytes = new byte[bytesLen];
            for (int i = 0; i < bytesLen; i++)
            {
                dstBytes[i] = BitReverseTable[srcBytes[i]];
            }
            return dstBytes;
        }
    }

    /// <summary>
    /// 字符串处理工具
    /// </summary>
    public class String
    {
        /// <summary>
        /// 反转字符串
        /// </summary>
        /// <param name="s">输入的字符串</param>
        /// <returns>反转后的字符串</returns>
        public static string Reverse(string s)
        {
            char[] charArray = s.ToCharArray();
            Array.Reverse(charArray);
            return new string(charArray);
        }

    }

    /// <summary>
    /// 图像处理工具
    /// </summary>
    public class Image
    {
        /// <summary>
        /// 将 RGB565 格式转换为 RGB24 格式
        /// RGB565: 5位红色 + 6位绿色 + 5位蓝色 = 16位 (2字节)
        /// RGB24: 8位红色 + 8位绿色 + 8位蓝色 = 24位 (3字节)
        /// </summary>
        /// <param name="rgb565Data">RGB565格式的原始数据</param>
        /// <param name="width">图像宽度</param>
        /// <param name="height">图像高度</param>
        /// <param name="isLittleEndian">是否为小端序（默认为true）</param>
        /// <returns>RGB24格式的转换后数据</returns>
        public static Result<byte[]> ConvertRGB565ToRGB24(byte[] rgb565Data, int width, int height, bool isLittleEndian = true)
        {
            if (rgb565Data == null)
                return new(new ArgumentNullException(nameof(rgb565Data)));

            if (width <= 0 || height <= 0)
                return new(new ArgumentException("Width and height must be positive"));

            // 计算像素数量
            var expectedPixelCount = width * height;
            var actualPixelCount = rgb565Data.Length / 2;

            if (actualPixelCount < expectedPixelCount)
            {
                return new(new ArgumentException(
                    $"RGB565 data length insufficient. Expected: {expectedPixelCount * 2} bytes, Actual: {rgb565Data.Length} bytes"));
            }

            try
            {
                var pixelCount = Math.Min(actualPixelCount, expectedPixelCount);
                var rgb24Data = new byte[pixelCount * 3];

                for (int i = 0; i < pixelCount; i++)
                {
                    // 读取 RGB565 数据
                    var rgb565Index = i * 2;
                    if (rgb565Index + 1 >= rgb565Data.Length) break;

                    // 组合成16位值
                    UInt16 rgb565;
                    if (isLittleEndian)
                    {
                        rgb565 = (UInt16)(rgb565Data[rgb565Index] | (rgb565Data[rgb565Index + 1] << 8));
                    }
                    else
                    {
                        rgb565 = (UInt16)((rgb565Data[rgb565Index] << 8) | rgb565Data[rgb565Index + 1]);
                    }

                    // 提取各颜色分量
                    var r5 = (rgb565 >> 11) & 0x1F;  // 高5位为红色
                    var g6 = (rgb565 >> 5) & 0x3F;   // 中间6位为绿色
                    var b5 = rgb565 & 0x1F;          // 低5位为蓝色

                    // 转换为8位颜色值
                    var r8 = (byte)((r5 * 255) / 31);  // 5位扩展到8位
                    var g8 = (byte)((g6 * 255) / 63);  // 6位扩展到8位
                    var b8 = (byte)((b5 * 255) / 31);  // 5位扩展到8位

                    // 存储到 RGB24 数组
                    var rgb24Index = i * 3;
                    rgb24Data[rgb24Index] = r8;     // R
                    rgb24Data[rgb24Index + 1] = g8; // G
                    rgb24Data[rgb24Index + 2] = b8; // B
                }

                return rgb24Data;
            }
            catch (Exception ex)
            {
                return new(ex);
            }
        }

        /// <summary>
        /// 将 RGB24 格式转换为 RGB565 格式
        /// RGB24: 8位红色 + 8位绿色 + 8位蓝色 = 24位 (3字节)
        /// RGB565: 5位红色 + 6位绿色 + 5位蓝色 = 16位 (2字节)
        /// </summary>
        /// <param name="rgb24Data">RGB24格式的原始数据</param>
        /// <param name="width">图像宽度</param>
        /// <param name="height">图像高度</param>
        /// <param name="isLittleEndian">是否为小端序（默认为true）</param>
        /// <returns>RGB565格式的转换后数据</returns>
        public static Result<byte[]> ConvertRGB24ToRGB565(byte[] rgb24Data, int width, int height, bool isLittleEndian = true)
        {
            if (rgb24Data == null)
                return new(new ArgumentNullException(nameof(rgb24Data)));

            if (width <= 0 || height <= 0)
                return new(new ArgumentException("Width and height must be positive"));

            var expectedPixelCount = width * height;
            var actualPixelCount = rgb24Data.Length / 3;

            if (actualPixelCount < expectedPixelCount)
            {
                return new(new ArgumentException(
                    $"RGB24 data length insufficient. Expected: {expectedPixelCount * 3} bytes, Actual: {rgb24Data.Length} bytes"));
            }

            try
            {
                var pixelCount = Math.Min(actualPixelCount, expectedPixelCount);
                var rgb565Data = new byte[pixelCount * 2];

                for (int i = 0; i < pixelCount; i++)
                {
                    var rgb24Index = i * 3;
                    if (rgb24Index + 2 >= rgb24Data.Length) break;

                    // 读取 RGB24 数据
                    var r8 = rgb24Data[rgb24Index];
                    var g8 = rgb24Data[rgb24Index + 1];
                    var b8 = rgb24Data[rgb24Index + 2];

                    // 转换为5位、6位、5位
                    var r5 = (UInt16)((r8 * 31) / 255);
                    var g6 = (UInt16)((g8 * 63) / 255);
                    var b5 = (UInt16)((b8 * 31) / 255);

                    // 组合成16位值
                    var rgb565 = (UInt16)((r5 << 11) | (g6 << 5) | b5);

                    // 存储到 RGB565 数组
                    var rgb565Index = i * 2;
                    if (isLittleEndian)
                    {
                        rgb565Data[rgb565Index] = (byte)(rgb565 & 0xFF);
                        rgb565Data[rgb565Index + 1] = (byte)(rgb565 >> 8);
                    }
                    else
                    {
                        rgb565Data[rgb565Index] = (byte)(rgb565 >> 8);
                        rgb565Data[rgb565Index + 1] = (byte)(rgb565 & 0xFF);
                    }
                }

                return rgb565Data;
            }
            catch (Exception ex)
            {
                return new(ex);
            }
        }

        /// <summary>
        /// 将 RGB24 数据转换为 JPEG 格式
        /// </summary>
        /// <param name="rgb24Data">RGB24格式的图像数据</param>
        /// <param name="width">图像宽度</param>
        /// <param name="height">图像高度</param>
        /// <param name="quality">JPEG质量（1-100，默认80）</param>
        /// <returns>JPEG格式的字节数组</returns>
        public static Result<byte[]> ConvertRGB24ToJpeg(byte[] rgb24Data, int width, int height, int quality = 80)
        {
            if (rgb24Data == null)
                return new(new ArgumentNullException(nameof(rgb24Data)));

            if (width <= 0 || height <= 0)
                return new(new ArgumentException("Width and height must be positive"));

            if (quality < 1 || quality > 100)
                return new(new ArgumentException("Quality must be between 1 and 100"));

            var expectedDataLength = width * height * 3;
            if (rgb24Data.Length < expectedDataLength)
            {
                return new(new ArgumentException(
                    $"RGB24 data length insufficient. Expected: {expectedDataLength} bytes, Actual: {rgb24Data.Length} bytes"));
            }

            try
            {
                using var image = new SixLabors.ImageSharp.Image<Rgb24>(width, height);

                // 将 RGB 数据复制到 ImageSharp 图像
                for (int y = 0; y < height; y++)
                {
                    for (int x = 0; x < width; x++)
                    {
                        int index = (y * width + x) * 3;
                        if (index + 2 < rgb24Data.Length)
                        {
                            var pixel = new Rgb24(rgb24Data[index], rgb24Data[index + 1], rgb24Data[index + 2]);
                            image[x, y] = pixel;
                        }
                    }
                }

                using var stream = new MemoryStream();
                image.SaveAsJpeg(stream, new JpegEncoder { Quality = quality });
                return stream.ToArray();
            }
            catch (Exception ex)
            {
                return new(ex);
            }
        }

        /// <summary>
        /// 将 RGB565 数据直接转换为 JPEG 格式
        /// </summary>
        /// <param name="rgb565Data">RGB565格式的图像数据</param>
        /// <param name="width">图像宽度</param>
        /// <param name="height">图像高度</param>
        /// <param name="quality">JPEG质量（1-100，默认80）</param>
        /// <param name="isLittleEndian">是否为小端序（默认为true）</param>
        /// <returns>JPEG格式的字节数组</returns>
        public static Result<byte[]> ConvertRGB565ToJpeg(byte[] rgb565Data, int width, int height, int quality = 80, bool isLittleEndian = true)
        {
            // 先转换为RGB24
            var rgb24Result = ConvertRGB565ToRGB24(rgb565Data, width, height, isLittleEndian);
            if (!rgb24Result.IsSuccessful)
            {
                return new(rgb24Result.Error);
            }

            // 再转换为JPEG
            return ConvertRGB24ToJpeg(rgb24Result.Value, width, height, quality);
        }

        /// <summary>
        /// 创建 MJPEG 帧头部
        /// </summary>
        /// <param name="frameDataLength">帧数据长度</param>
        /// <param name="boundary">边界字符串（默认为"--boundary"）</param>
        /// <returns>MJPEG帧头部字节数组</returns>
        public static byte[] CreateMjpegFrameHeader(int frameDataLength, string boundary = "--boundary")
        {
            var header = $"{boundary}\r\nContent-Type: image/jpeg\r\nContent-Length: {frameDataLength}\r\n\r\n";
            return Encoding.ASCII.GetBytes(header);
        }

        /// <summary>
        /// 创建 MJPEG 帧尾部
        /// </summary>
        /// <returns>MJPEG帧尾部字节数组</returns>
        public static byte[] CreateMjpegFrameFooter()
        {
            return Encoding.ASCII.GetBytes("\r\n");
        }

        /// <summary>
        /// 创建完整的 MJPEG 帧数据
        /// </summary>
        /// <param name="jpegData">JPEG数据</param>
        /// <param name="boundary">边界字符串（默认为"--boundary"）</param>
        /// <returns>完整的MJPEG帧数据</returns>
        public static Result<byte[]> CreateMjpegFrame(byte[] jpegData, string boundary = "--boundary")
        {
            if (jpegData == null)
                return new(new ArgumentNullException(nameof(jpegData)));

            try
            {
                var header = CreateMjpegFrameHeader(jpegData.Length, boundary);
                var footer = CreateMjpegFrameFooter();

                var totalLength = header.Length + jpegData.Length + footer.Length;
                var frameData = new byte[totalLength];

                var offset = 0;
                Array.Copy(header, 0, frameData, offset, header.Length);
                offset += header.Length;

                Array.Copy(jpegData, 0, frameData, offset, jpegData.Length);
                offset += jpegData.Length;

                Array.Copy(footer, 0, frameData, offset, footer.Length);

                return frameData;
            }
            catch (Exception ex)
            {
                return new(ex);
            }
        }

        /// <summary>
        /// 验证图像数据长度是否正确
        /// </summary>
        /// <param name="data">图像数据</param>
        /// <param name="width">图像宽度</param>
        /// <param name="height">图像高度</param>
        /// <param name="bytesPerPixel">每像素字节数</param>
        /// <returns>验证结果</returns>
        public static bool ValidateImageDataLength(byte[] data, int width, int height, int bytesPerPixel)
        {
            if (data == null || width <= 0 || height <= 0 || bytesPerPixel <= 0)
                return false;

            var expectedLength = width * height * bytesPerPixel;
            return data.Length >= expectedLength;
        }

        /// <summary>
        /// 获取图像格式信息
        /// </summary>
        /// <param name="format">图像格式枚举</param>
        /// <returns>格式信息</returns>
        public static ImageFormatInfo GetImageFormatInfo(ImageFormat format)
        {
            return format switch
            {
                ImageFormat.RGB565 => new ImageFormatInfo("RGB565", 2, "16-bit RGB format (5R+6G+5B)"),
                ImageFormat.RGB24 => new ImageFormatInfo("RGB24", 3, "24-bit RGB format (8R+8G+8B)"),
                ImageFormat.RGBA32 => new ImageFormatInfo("RGBA32", 4, "32-bit RGBA format (8R+8G+8B+8A)"),
                ImageFormat.Grayscale8 => new ImageFormatInfo("Grayscale8", 1, "8-bit grayscale format"),
                _ => new ImageFormatInfo("Unknown", 0, "Unknown image format")
            };
        }
    }

    /// <summary>
    /// 图像格式枚举
    /// </summary>
    public enum ImageFormat
    {
        RGB565,
        RGB24,
        RGBA32,
        Grayscale8
    }

    /// <summary>
    /// 图像格式信息
    /// </summary>
    public record ImageFormatInfo(string Name, int BytesPerPixel, string Description);
}