using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Structure;
using System.Drawing;
using System;
using System.IO;
using System.Reflection;
using System.Collections.Generic;
using WingAIDiagnosisService.Manage;

namespace WingAIDiagnosisService.Carotid.Utilities
{
    /// <summary>
    /// 识别颈动脉类型，左颈还是右颈
    /// </summary>
    public class RecognizeCarotidType : IDisposable
    {
        private const string MFDllName = "mf.dll";
        private string[] _fileNameLeft;
        private string[] _fileNameRight;
        private Image<Bgr, byte>[] _imagesLeft;
        private Image<Bgr, byte>[] _imagesRight;

        static RecognizeCarotidType()
        {
            var x64Folder = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Emgu.CV", "win-x64");
            if (Environment.OSVersion.Platform == PlatformID.Win32NT)
            {
                var mfDll = Path.Combine(x64Folder, MFDllName);
                if (!File.Exists(mfDll))
                {
                    var systemMfDll = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.System), MFDllName);
                    //If system32 don't exist mf environment.
                    if (!File.Exists(systemMfDll))
                    {
                        var folderName = GetDirectoryFolderName(Environment.OSVersion.Version);
                        if (!string.IsNullOrWhiteSpace(folderName))
                        {
                            var directoryInfo = new DirectoryInfo(Path.Combine(x64Folder, folderName));
                            var fileInfos = directoryInfo.GetFiles();
                            for (int i = 0; i < fileInfos.Length; ++i)
                            {
                                File.Copy(fileInfos[i].FullName, Path.Combine(x64Folder, fileInfos[i].Name), true);
                            }
                        }
                    }
                }
            }

            if (Environment.Is64BitProcess)
            {
                Emgu.Util.Toolbox.SetDllDirectory(x64Folder);
            }
            else
            {
                Emgu.Util.Toolbox.SetDllDirectory(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Emgu.CV", "win-x86"));
            }
        }

        private static string GetDirectoryFolderName(Version version)
        {
            if (version.Major == 6)
            {
                if (version.Minor == 1)
                {
                    return "6.1";
                }

                if (version.Minor == 2)
                {
                    return "6.2";
                }
            }

            return string.Empty;
        }

        public bool Initialization()
        {
            try
            {
                var classType = GetType();
                var resourceNamespace = classType.Namespace?.Replace("Utilities", "Images");
                var assembly = classType.Assembly;
                if (assembly == null || string.IsNullOrWhiteSpace(resourceNamespace))
                {
                    return false;
                }
                //所有资源
                var allResourceName = assembly.GetManifestResourceNames();

                _fileNameLeft = GetLeftSamplePath(allResourceName, resourceNamespace);
                _imagesLeft = new Image<Bgr, byte>[_fileNameLeft.Length];
                for (var i = 0; i < _fileNameLeft.Length; ++i)
                {
                    _imagesLeft[i] = GetImageFromResource(_fileNameLeft[i], assembly);
                }

                _fileNameRight = GetRightSamplePath(allResourceName, resourceNamespace);
                _imagesRight = new Image<Bgr, byte>[_fileNameRight.Length];

                for (var i = 0; i < _fileNameRight.Length; ++i)
                {
                    _imagesRight[i] = GetImageFromResource(_fileNameRight[i], assembly);
                }
                return true;
            }
            catch (Exception e)
            {
                return false;
            }
        }

        private string[] GetLeftSamplePath(string[] allFilePath, string rootPath)
        {
            string leftFloder = rootPath + ".left";
            string leftFloder1 = rootPath + ".left1";
            var nameList = new List<string>();
            for (var i = 0; i < allFilePath.Length; ++i)
            {
                if (allFilePath[i].Contains(leftFloder) || allFilePath[i].Contains(leftFloder1))
                {
                    nameList.Add(allFilePath[i]);
                }
            }

            return nameList.ToArray();
        }

        private string[] GetRightSamplePath(string[] allFilePath, string rootPath)
        {
            string leftFloder = rootPath + ".right";
            string leftFloder1 = rootPath + ".right1";
            var nameList = new List<string>();
            for (var i = 0; i < allFilePath.Length; ++i)
            {
                if (allFilePath[i].Contains(leftFloder) || allFilePath[i].Contains(leftFloder1))
                {
                    nameList.Add(allFilePath[i]);
                }
            }
            return nameList.ToArray();
        }

        private Image<Bgr, byte> GetImageFromResource(string fileName, Assembly assembly)
        {
            using Stream stream = assembly.GetManifestResourceStream(fileName);
            byte[] imageBuffer = new byte[stream.Length];
            stream.Read(imageBuffer, 0, imageBuffer.Length);
            //转成彩色图像
            using var img = new Mat();
            CvInvoke.Imdecode(imageBuffer, ImreadModes.Color, img);
            return img.ToImage<Bgr, byte>();
        }

        public CarotidScanType RecognizeType(Image<Bgr, byte> imageBgr)
        {
            using Image<Bgr, byte> image = imageBgr.Copy(new Rectangle(0, 0, imageBgr.Width / 2, imageBgr.Height / 2));
            double maxLeft = 0;
            for (var i = 0; i < _imagesLeft.Length; ++i)
            {
                var confidence = MatchImage(_imagesLeft[i], image);
                if (confidence > maxLeft)
                {
                    maxLeft = confidence;
                }
            }

            double maxRight = 0;
            for (var i = 0; i < _imagesRight.Length; ++i)
            {
                var confidence = MatchImage(_imagesRight[i], image);
                if (confidence > maxRight)
                {
                    maxRight = confidence;
                }
            }
            if (maxRight > 0.7 || maxLeft > 0.7)
            {
                if (maxRight > maxLeft)
                {
                    return CarotidScanType.CarotidRight;
                }
            }
            return CarotidScanType.CarotidLeft;
        }

        private double MatchImage(Image<Bgr, byte> imageSmall, Image<Bgr, byte> imageLarge)
        {
            using Mat MatchResult = new Mat();//匹配结果
            //判断子图是否在原图中
            CvInvoke.MatchTemplate(imageLarge, imageSmall, MatchResult, TemplateMatchingType.CcorrNormed);

            Point max_loc = new Point();
            Point min_loc = new Point();
            double max = 0, min = 0;
            CvInvoke.MinMaxLoc(MatchResult, ref min, ref max, ref min_loc, ref max_loc);//获得极值信息
            return max;
        }

        public void Dispose()
        {
            if (_fileNameLeft != null && _imagesLeft != null)
            {
                for (var i = 0; i < _fileNameLeft.Length; ++i)
                {
                    _fileNameLeft[i] = null;
                    _imagesLeft[i]?.Dispose();
                }
            }

            if (_fileNameRight != null && _imagesRight != null)
            {
                for (var i = 0; i < _fileNameRight.Length; ++i)
                {
                    _fileNameRight[i] = null;
                    _imagesRight[i]?.Dispose();
                }
            }

            _fileNameLeft = null;
            _fileNameRight = null;
            _imagesLeft = null;
            _imagesRight = null;
        }
    }
}