using MvCodeReaderSDKNet;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Runtime.InteropServices;
using System.Text;

namespace Aucma.Core.Scanner
{
    public  class MvCodeHelper
    {
        static  MvCodeReader.MV_CODEREADER_DEVICE_INFO_LIST m_stDeviceList = new MvCodeReader.MV_CODEREADER_DEVICE_INFO_LIST();
        static  MvCodeReader.MV_CODEREADER_DEVICE_INFO stDevInfo;// 通用设备信息
        private static MvCodeReader m_cMyDevice = new MvCodeReader();
        bool m_bGrabbing = true;

        // ch:用于从驱动获取图像的缓存 | en:Buffer for getting image from driver
        byte[] m_BufForDriver = new byte[1024 * 1024 * 20];
         
        // 显示
        Bitmap bmp = null;
        Graphics gra = null;
        Pen pen = new Pen(Color.Blue, 3);                   // 画笔颜色
        Point[] stPointList = new Point[4];                 // 条码位置的4个点坐标
        GraphicsPath WayShapePath = new GraphicsPath();     // 图形路径，内部变量 
        GraphicsPath OcrShapePath = new GraphicsPath();     // 图形路径，内部变量
        Matrix stRotateWay = new Matrix();
        Matrix stRotateM = new Matrix();
        Pen penOcr = new Pen(Color.Yellow, 3);
        Pen penWay = new Pen(Color.Red, 3);

        #region 获取设备列表
        /// <summary>
        /// 获取设备列表
        /// </summary>
        public static void DeviceListAcq()
        {
            // ch:创建设备列表 | en:Create Device List
            System.GC.Collect();
            m_stDeviceList.nDeviceNum = 0;
            int nRet = MvCodeReader.MV_CODEREADER_EnumDevices_NET(ref m_stDeviceList, MvCodeReader.MV_CODEREADER_GIGE_DEVICE);
            if (0 != nRet)
            {
                ShowErrorMsg("Enumerate devices fail!", nRet);
                return;
            }

            if (0 == m_stDeviceList.nDeviceNum)
            {
                ShowErrorMsg("None Device!", 0);
                return;
            }
            string strUserDefinedName = "";
            //获取设备列表
            for (int i = 0; i < m_stDeviceList.nDeviceNum; i++)
            {
                MvCodeReader.MV_CODEREADER_DEVICE_INFO stDevInfo = (MvCodeReader.MV_CODEREADER_DEVICE_INFO)Marshal.PtrToStructure(m_stDeviceList.pDeviceInfo[i], typeof(MvCodeReader.MV_CODEREADER_DEVICE_INFO));
                if (stDevInfo.nTLayerType == MvCodeReader.MV_CODEREADER_GIGE_DEVICE)
                {
                    IntPtr buffer = Marshal.UnsafeAddrOfPinnedArrayElement(stDevInfo.SpecialInfo.stGigEInfo, 0);
                    MvCodeReader.MV_CODEREADER_GIGE_DEVICE_INFO stGigEDeviceInfo = (MvCodeReader.MV_CODEREADER_GIGE_DEVICE_INFO)Marshal.PtrToStructure(buffer, typeof(MvCodeReader.MV_CODEREADER_GIGE_DEVICE_INFO));

                    if (stGigEDeviceInfo.chUserDefinedName != "")
                    {
                        byte[] byteUserDefinedName = Encoding.GetEncoding("GB2312").GetBytes(stGigEDeviceInfo.chUserDefinedName);
                        bool bIsValidUTF8 = IsTextUTF8(byteUserDefinedName);
                        if (bIsValidUTF8)
                        {
                            strUserDefinedName = Encoding.UTF8.GetString(byteUserDefinedName);
                        }
                        else
                        {
                            strUserDefinedName = Encoding.GetEncoding("GB2312").GetString(byteUserDefinedName);
                        }
                        Console.WriteLine("GEV: " + strUserDefinedName + " (" + stGigEDeviceInfo.chSerialNumber + ")");
                    }
                    else
                    {
                        Console.WriteLine("GEV: " + stGigEDeviceInfo.chManufacturerName + " " + stGigEDeviceInfo.chModelName + " (" + stGigEDeviceInfo.chSerialNumber + ")");
                    }
                }
            }
        }

        #endregion

        #region 扫描信息
        public static void StartGrab()
        {
            Thread m_hReceiveThread = new Thread(ReceiveThreadProcess);
            m_hReceiveThread.Start();
        }
        public static void ReceiveThreadProcess()
        {
            int nRet = MvCodeReader.MV_CODEREADER_OK;

            IntPtr pData = IntPtr.Zero;
            MvCodeReader.MV_CODEREADER_IMAGE_OUT_INFO_EX2 stFrameInfoEx2 = new MvCodeReader.MV_CODEREADER_IMAGE_OUT_INFO_EX2();
            IntPtr pstFrameInfoEx2 = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(MvCodeReader.MV_CODEREADER_IMAGE_OUT_INFO_EX2)));
            Marshal.StructureToPtr(stFrameInfoEx2, pstFrameInfoEx2, false);
            int ik = 0;
            while (true)
            {
                nRet = m_cMyDevice.MV_CODEREADER_GetOneFrameTimeoutEx2_NET(ref pData, pstFrameInfoEx2, 1000);
                // ch:获取一帧图像 | en:Get one image
                if (MvCodeReader.MV_CODEREADER_OK == nRet)
                {
                    stFrameInfoEx2 = (MvCodeReader.MV_CODEREADER_IMAGE_OUT_INFO_EX2)Marshal.PtrToStructure(pstFrameInfoEx2, typeof(MvCodeReader.MV_CODEREADER_IMAGE_OUT_INFO_EX2));
                    // 分配条码内存空间
                    MvCodeReader.MV_CODEREADER_RESULT_BCR_EX2 stBcrResult = (MvCodeReader.MV_CODEREADER_RESULT_BCR_EX2)Marshal.PtrToStructure(stFrameInfoEx2.UnparsedBcrList.pstCodeListEx2, typeof(MvCodeReader.MV_CODEREADER_RESULT_BCR_EX2));
                   
                    for (int i = 0; i < stBcrResult.nCodeNum; ++i)
                    {
                        bool bIsValidUTF8 = IsTextUTF8(stBcrResult.stBcrInfoEx2[i].chCode);
                        if (bIsValidUTF8)
                        {
                            string strCode = System.Text.Encoding.Default.GetString(stBcrResult.stBcrInfoEx2[i].chCode);
                            //Console.WriteLine($"【{ik}】1条码信息[{strCode.Trim().TrimEnd('\0')}]");
                            //定义自己的业务处理方式
                            ik++;
                        }
                        else
                        {
                            string strCode = System.Text.Encoding.Default.GetString(stBcrResult.stBcrInfoEx2[i].chCode);
                            //Console.WriteLine($"【{ik}】2条码信息[{strCode.Trim().TrimEnd('\0')}]");
                            //定义自己的业务处理方式
                     
                        }
                    }

                    //MvCodeReader.MV_CODEREADER_OCR_INFO_LIST stOcrInfo = (MvCodeReader.MV_CODEREADER_OCR_INFO_LIST)Marshal.PtrToStructure(stFrameInfoEx2.UnparsedOcrList.pstOcrList, typeof(MvCodeReader.MV_CODEREADER_OCR_INFO_LIST));

                    //for (int i = 0; i < stOcrInfo.nOCRAllNum; i++)
                    //{
                    //    string strOcrCharCode = System.Text.Encoding.Default.GetString(stOcrInfo.stOcrRowInfo[i].chOcr);
                    //    Console.WriteLine("Get OcrInfo:" + "ocrNum[" + i.ToString() + "], ocrLen[" + Convert.ToString(stOcrInfo.stOcrRowInfo[i].nOcrLen) + "], ocrChar[" + strOcrCharCode.Trim().TrimEnd('\0') + "]");
                    //}
                }
                else
                {
                    Console.WriteLine("没有获取到数据:{0:x8}", nRet);
                    //重新获取数据
                    MvCodeHelper.DeviceListAcq();//获取设备
                    MvCodeHelper.OpenDevice();//打开设备
                }
            }
        } 
        #endregion

        #region 判断字符编码
        /// <summary>
        /// 判断字符编码
        /// </summary>
        /// <param name="inputStream"></param>
        /// <returns></returns>
        public static bool IsTextUTF8(byte[] inputStream)
        {
            int encodingBytesCount = 0;
            bool allTextsAreASCIIChars = true;

            for (int i = 0; i < inputStream.Length; i++)
            {
                byte current = inputStream[i];

                if ((current & 0x80) == 0x80)
                {
                    allTextsAreASCIIChars = false;
                }
                // First byte
                if (encodingBytesCount == 0)
                {
                    if ((current & 0x80) == 0)
                    {
                        // ASCII chars, from 0x00-0x7F
                        continue;
                    }

                    if ((current & 0xC0) == 0xC0)
                    {
                        encodingBytesCount = 1;
                        current <<= 2;

                        // More than two bytes used to encoding a unicode char.
                        // Calculate the real length.
                        while ((current & 0x80) == 0x80)
                        {
                            current <<= 1;
                            encodingBytesCount++;
                        }
                    }
                    else
                    {
                        // Invalid bits structure for UTF8 encoding rule.
                        return false;
                    }
                }
                else
                {
                    // Following bytes, must start with 10.
                    if ((current & 0xC0) == 0x80)
                    {
                        encodingBytesCount--;
                    }
                    else
                    {
                        // Invalid bits structure for UTF8 encoding rule.
                        return false;
                    }
                }
            }
            if (encodingBytesCount != 0)
            {
                // Invalid bits structure for UTF8 encoding rule.
                // Wrong following bytes count.
                return false;
            }
            // Although UTF8 supports encoding for ASCII chars, we regard as a input stream, whose contents are all ASCII as default encoding.
            return !allTextsAreASCIIChars;
        }

        #endregion

        #region 打开设备
        public static void OpenDevice()
        {
            if (m_stDeviceList.nDeviceNum == 0)
            {
                ShowErrorMsg("No stDevInfo, please select", 0);
                return ;
            }

            // ch:获取选择的设备信息 | en:Get selected stDevInfo information
            stDevInfo =(MvCodeReader.MV_CODEREADER_DEVICE_INFO)Marshal.PtrToStructure(m_stDeviceList.pDeviceInfo[0], typeof(MvCodeReader.MV_CODEREADER_DEVICE_INFO));

            // ch:打开设备 | en:Open stDevInfo
            if (null == m_cMyDevice)
            {
                m_cMyDevice = new MvCodeReader();
                if (null == m_cMyDevice)
                {
                    return;
                }
            }
        
            int nRet = m_cMyDevice.MV_CODEREADER_CreateHandle_NET(ref stDevInfo);//创建设备
            if (MvCodeReader.MV_CODEREADER_OK != nRet)
            {
                ShowErrorMsg("创建设备 fail!", nRet);
                return;
            }
            Console.WriteLine("创建设备成功！");
            nRet = m_cMyDevice.MV_CODEREADER_OpenDevice_NET();//打开设备
            if (MvCodeReader.MV_CODEREADER_OK != nRet)
            {
                m_cMyDevice.MV_CODEREADER_DestroyHandle_NET();
                ShowErrorMsg("Device open fail!", nRet);
                return;
            }
            Console.WriteLine("打开设备成功！");

            // ch:设置触发模式为off || en:set trigger mode as off
            if (MvCodeReader.MV_CODEREADER_OK != m_cMyDevice.MV_CODEREADER_SetEnumValue_NET("TriggerMode", 0))
            {
                Console.WriteLine("Set TriggerMode failed!");
                return;
            }
            Console.WriteLine("设置采集连续模式成功！");

            // ch:开启抓图 | en:start grab
            nRet = m_cMyDevice.MV_CODEREADER_StartGrabbing_NET();
            if (MvCodeReader.MV_CODEREADER_OK != nRet)
            {
                Console.WriteLine("Start grabbing failed:{0:x8}", nRet);
                return;
            }
            Console.WriteLine("开启抓图成功！");

            Console.WriteLine("设备已经开启");
        }

        #endregion

        #region 关闭设备
        public static void CloseDevice()
        {
            int nRet = MvCodeReader.MV_CODEREADER_OK;
            // ch:停止抓图 | en:Stop grab image
            nRet = m_cMyDevice.MV_CODEREADER_StopGrabbing_NET();
            if (MvCodeReader.MV_CODEREADER_OK != nRet)
            {
                Console.WriteLine("Stop grabbing failed{0:x8}", nRet);
            }
            // ch:关闭设备 | en:Close device
            nRet = m_cMyDevice.MV_CODEREADER_CloseDevice_NET();
            if (MvCodeReader.MV_CODEREADER_OK != nRet)
            {
                Console.WriteLine("Close device failed{0:x8}", nRet);
    
            }

            // ch:销毁设备 | en:Destroy device
            nRet = m_cMyDevice.MV_CODEREADER_DestroyHandle_NET();
            if (MvCodeReader.MV_CODEREADER_OK != nRet)
            {
                Console.WriteLine("Destroy device failed:{0:x8}", nRet);
            }


            //if (MvCodeReader.MV_CODEREADER_OK != nRet)
            //{
            //    // ch:销毁设备 | en:Destroy device
            //    nRet = m_cMyDevice.MV_CODEREADER_DestroyHandle_NET();
            //    if (MvCodeReader.MV_CODEREADER_OK != nRet)
            //    {
            //        Console.WriteLine("Destroy device failed:{0:x8}", nRet);
            //    }
            //}
            Console.WriteLine("设备已经关闭");
        } 
        #endregion

        #region 将Byte转换为结构体类型
        //将Byte转换为结构体类型
        public static object ByteToStruct(byte[] bytes, Type type)
        {
            int size = Marshal.SizeOf(type);
            if (size > bytes.Length)
            {
                return null;
            }
            //分配结构体内存空间
            IntPtr structPtr = Marshal.AllocHGlobal(size);
            //将byte数组拷贝到分配好的内存空间
            Marshal.Copy(bytes, 0, structPtr, size);
            //将内存空间转换为目标结构体
            object obj = Marshal.PtrToStructure(structPtr, type);
            //释放内存空间
            Marshal.FreeHGlobal(structPtr);
            return obj;
        }
        #endregion

        #region 异常信息展示
        /// <summary>
        /// 异常信息展示
        /// </summary>
        /// <param name="csMessage"></param>
        /// <param name="nErrorNum"></param>
        private static void ShowErrorMsg(string csMessage, int nErrorNum)
        {
            string errorMsg;
            if (nErrorNum == 0)
            {
                errorMsg = csMessage;
            }
            else
            {
                errorMsg = csMessage + ": Error =" + String.Format("{0:X}", nErrorNum);
            }

            switch (nErrorNum)
            {
                case MvCodeReader.MV_CODEREADER_E_HANDLE: errorMsg += " Error or invalid handle "; break;
                case MvCodeReader.MV_CODEREADER_E_SUPPORT: errorMsg += " Not supported function "; break;
                case MvCodeReader.MV_CODEREADER_E_BUFOVER: errorMsg += " Cache is full "; break;
                case MvCodeReader.MV_CODEREADER_E_CALLORDER: errorMsg += " Function calling order error "; break;
                case MvCodeReader.MV_CODEREADER_E_PARAMETER: errorMsg += " Incorrect parameter "; break;
                case MvCodeReader.MV_CODEREADER_E_RESOURCE: errorMsg += " Applying resource failed "; break;
                case MvCodeReader.MV_CODEREADER_E_NODATA: errorMsg += " No data "; break;
                case MvCodeReader.MV_CODEREADER_E_PRECONDITION: errorMsg += " Precondition error, or running environment changed "; break;
                case MvCodeReader.MV_CODEREADER_E_VERSION: errorMsg += " Version mismatches "; break;
                case MvCodeReader.MV_CODEREADER_E_NOENOUGH_BUF: errorMsg += " Insufficient memory "; break;
                case MvCodeReader.MV_CODEREADER_E_UNKNOW: errorMsg += " Unknown error "; break;
                case MvCodeReader.MV_CODEREADER_E_GC_GENERIC: errorMsg += " General error "; break;
                case MvCodeReader.MV_CODEREADER_E_GC_ACCESS: errorMsg += " Node accessing condition error "; break;
                case MvCodeReader.MV_CODEREADER_E_ACCESS_DENIED: errorMsg += " No permission "; break;
                case MvCodeReader.MV_CODEREADER_E_BUSY: errorMsg += " Device is busy, or network disconnected "; break;
                case MvCodeReader.MV_CODEREADER_E_NETER: errorMsg += " Network error "; break;
            }

            Console.WriteLine(errorMsg, "PROMPT");
        }

        #endregion

    }
}