using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using Emgu.CV;
using Emgu.CV.Structure;

namespace DemoUI
{
	public class CommonMethod
	{

		//  前端
		[DllImport("FaceApi.dll", SetLastError = true, CharSet = CharSet.Ansi)]
		//public extern static int initGetFace(int imgWidht, int imgHeight, float resolutionF, double clarityF, double poseExF, double brigthF, double integF, double poseF);
		public extern static int initGetFace(int imgWidht, int imgHeight, int maxFace);
		[DllImport("FaceApi.dll", SetLastError = true, CharSet = CharSet.Ansi)]
		public extern static IntPtr getFace(IntPtr src);

		[DllImport("FaceApi.dll", SetLastError = true, CharSet = CharSet.Ansi)]
		private extern static IntPtr getProperty(IntPtr src, int x, int y, int widht, int height);

		[DllImport("FaceApi.dll", SetLastError = true, CharSet = CharSet.Ansi)]
		public extern static void delPtr(IntPtr src);

		[StructLayoutAttribute(LayoutKind.Sequential)]

		//前端结构体
		public struct faceInfo
		{
			public int faceSize;
			[MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)]
			faceObj[] faceobj;
			public int FaceSize { get => faceSize; set => faceSize = value; }
			public faceObj[] Faceobj { get => faceobj; set => faceobj = value; }
		}
		public static bool pulse = false;

		//前端结构体
		public struct faceObj
		{
			int pid;
			int x;
			int y;
			int width;
			int height;
			float resolution_score;
			float clarity_score;
			float poseEx_score;
			float brigth_score;
			float integ_score;
			float pose_score;
			public int Pid { get => pid; set => pid = value; }
			public int X { get => x; set => x = value; }
			public int Y { get => y; set => y = value; }
			public int Width { get => width; set => width = value; }
			public int Height { get => height; set => height = value; }
			public float Resolution_score { get => resolution_score; set => resolution_score = value; }
			public float Clarity_score { get => clarity_score; set => clarity_score = value; }
			public float PoseEx_score { get => poseEx_score; set => poseEx_score = value; }
			public float Brigth_score { get => brigth_score; set => brigth_score = value; }
			public float Integ_score { get => integ_score; set => integ_score = value; }
			public float Pose_score { get => pose_score; set => pose_score = value; }
		}

		public struct faceProperty
		{
			int sex;
			int old;
			public int Sex { get => sex; set => sex = value; }
			public int Old { get => old; set => old = value; }
		}
		public static faceProperty getProperty(IntPtr facePtr, faceObj obj)
		{
			IntPtr faceProperty = getProperty(facePtr, obj.X, obj.Y, obj.Width, obj.Height);
			return (faceProperty)Marshal.PtrToStructure(faceProperty, typeof(faceProperty));
		}
		public struct faceQuality
		{

			int sex;

			int old;

			int left_eye_status;

			int right_eye_status;

			public int Sex { get => sex; set => sex = value; }
			public int Old { get => old; set => old = value; }
			public int Left_eye_status { get => left_eye_status; set => left_eye_status = value; }
			public int Right_eye_status { get => right_eye_status; set => right_eye_status = value; }
		}
		public static faceQuality getQuality(IntPtr ptr)
		{
			var facequality = (faceQuality)Marshal.PtrToStructure(ptr, typeof(faceQuality));
			return facequality;
		}
		public static faceInfo getFaceInfo(IntPtr ptr, Mat mat)
		{
			var faceinfo = (faceInfo)Marshal.PtrToStructure(ptr, typeof(faceInfo));
			if (faceinfo.faceSize == 0)
			{
				delPtr(ptr);
			}
			return faceinfo;
		}


		//阈值结构体(可重写)
		public struct thresholdFp
		{
			float resolutionF;
			double clarityF;
			double poseExF;
			double brigthF;
			double integF;
			double poseF;

			public float ResolutionF { get => resolutionF; set => resolutionF = value; }
			public double ClarityF { get => clarityF; set => clarityF = value; }
			public double PoseExF { get => poseExF; set => poseExF = value; }
			public double BrigthF { get => brigthF; set => brigthF = value; }
			public double IntegF { get => integF; set => integF = value; }
			public double PoseF { get => poseF; set => poseF = value; }
		}
		//图片转为base64编码的字符串
		public static string ImgToBase64String(Bitmap bmp)
		{
			try
			{
				MemoryStream ms = new MemoryStream();
				bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
				byte[] arr = new byte[ms.Length];
				ms.Position = 0;
				ms.Read(arr, 0, (int)ms.Length);
				ms.Close();
				return Convert.ToBase64String(arr);
			}
			catch (Exception ex)
			{
				return null;
			}
		}
		public static Bitmap Base64StringToImage(string strbase64)
		{
			try
			{
				byte[] arr = Convert.FromBase64String(strbase64);
				MemoryStream ms = new MemoryStream(arr);
				Bitmap bmp = new Bitmap(ms);
				ms.Close();
				return bmp;
			}
			catch (Exception ex)
			{
				return null;
			}
		}
		public static IntPtr BitPtr(Bitmap image)
		{

			int width = image.Width;

			int height = image.Height;

			int length = height * 3 * width;

			var RGB = new byte[length];

			BitmapData data = image.LockBits(new System.Drawing.Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format24bppRgb);

			System.IntPtr Scan0 = data.Scan0;

			System.Runtime.InteropServices.Marshal.Copy(Scan0, RGB, 0, length);

			double gray = 0;

			for (int i = 0; i < RGB.Length; i = i + 3)
			{

				gray = RGB[i + 2] * 0.3 + RGB[i + 1] * 0.59 + RGB[i] * 0.11;

				RGB[i + 2] = RGB[i + 1] = RGB[i] = (byte)gray;
			}
			System.Runtime.InteropServices.Marshal.Copy(RGB, 0, Scan0, length);
			image.UnlockBits(data);
			return Scan0;
		}
		public Mat Bitmap2Mat(Bitmap bitmap)
		{
			Emgu.CV.Image<Bgr, Byte> currentFrame = new Emgu.CV.Image<Bgr, Byte>(bitmap);  //只能这么转
			Mat invert = new Mat();
			CvInvoke.BitwiseAnd(currentFrame, currentFrame, invert);
			return invert;
		}
	}
}