using AI.Common;
using AI.Common.Log;
using AI.Common.Tools;
using UsHepatoRenalRatioDetectLib.OrganSegProcessModule;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using UsHepatoRenalRatioDetectLib.EchoROIAnalyserModule;
using System.ComponentModel;
using UsHepatoRenalRatioDetectLib.UsHRRCalculaterModule;

namespace UsHepatoRenalRatioDetectLib
{
    public class UsHepatoRenalRatioDetect : IUsHepatoRenalRatioDetect
    {
        #region private

        private readonly object _netNameLocker = new object();

        private IOrganSegProcess _organSegProcess;
        private bool _isCropped = false;
        private volatile bool _initialized = false;
        private volatile bool _enable = false;

        private ConcurrentQueue<RawImage> _inputImages = new ConcurrentQueue<RawImage>();
        private const int _queueMaxSize = 1;
        private readonly ManualResetEvent _waitImageEvent = new ManualResetEvent(true);
        private readonly ManualResetEvent _processFinishEvent = new ManualResetEvent(true);
        private Thread _imageProcessThread;
        private volatile bool _disposing = false;

        private IUsHRRAnalyser _echoAnalyser = new UsHRRAnalyser();

        private IUsHRRCalculater _echoCalculater = new UsHRRCalculater();

        private InferenceCore _inferenceCore = new InferenceCore();

        #endregion


        #region 实现接口

        /// <summary>
        /// 通知订阅者，有log要记
        /// </summary>
        public event EventHandler<LogEventArgs> NotifyLog;

        /// <summary>
        /// 通知订阅者，有错误发生
        /// </summary>
        public event EventHandler<ErrorEventArgs> NotifyError;

        /// <summary>
        /// 通知订阅者，肝肾比计算结果有更新
        /// </summary>
        public event EventHandler<UsHRRDetectUpdateEvent> NotifyProcessFinish;

        /// <summary>
        /// 初始化分割模型
        /// </summary>
        /// <param name="netDir">模型地址</param>
        /// <param name="isCropped">是否裁剪</param>
        public void Init(string netDir, bool isCropped)
        {
            if (!_initialized)
            {
                if (_organSegProcess == null)
                {
                    _organSegProcess = new OrganSegProcess();
                    _organSegProcess.NotifyLog += OnLogWrite;

                    int modelCpu = 1;

                    // 设置inferCore的参数
                    _inferenceCore.SetConfig(EnumInferCoreConfigKey.CPU_THREADS_NUM, modelCpu.ToString(), EnumDeviceType.CPU);
                    _organSegProcess.Init(_inferenceCore, EnumDeviceType.CPU, netDir);
                }
                _isCropped = isCropped;
                _initialized = true;
            }
        }

        /// <summary>
        /// 加载网络
        /// </summary>
        public void LoadInferNet()
        {
            if (!_initialized)
            {
                NotifyError?.Invoke(this, new ErrorEventArgs(new Exception("HepatoRenalEchoContrastDetect should be initialized before use.")));
            }
            _organSegProcess.LoadGuideInferNet();
        }

        /// <summary>
        /// 开始处理
        /// </summary>
        public void StartProcess()
        {
            _enable = true;
        }

        /// <summary>
        /// 停止处理
        /// </summary>
        public void StopProcess()
        {
            _enable = false;
            // 是否需要清空待处理队列里的数据？
        }

        /// <summary>
        /// 更新超声图像
        /// </summary>
        /// <param name="image"></param>
        public void UpdateUsImage(RawImage image)
        {
            if (!_initialized)
            {
                NotifyError?.Invoke(this, new ErrorEventArgs(new Exception("HepatoRenalEchoContrastDetect should be initialized before use.")));
            }
            if (_enable)
            {
                _inputImages.Enqueue(image.Clone());
                _waitImageEvent.Set();
                if (_imageProcessThread == null || !_imageProcessThread.IsAlive)
                {
                    _imageProcessThread = new Thread(() => DoImageProcess())
                    {
                        IsBackground = true,
                        Name = "ImageProcess"
                    };
                    _imageProcessThread.Start();
                }
            }
        }

        /// <summary>
        /// 计算两个Roi区域内回声比值
        /// </summary>
        /// <param name="image"></param>
        /// <param name="rcLiver"></param>
        /// <param name="rcKidney"></param>
        /// <param name="echoContrastValue"></param>
        public double GetHepatoRenalRatio(RawImage image, Rect rcLiver, Rect rcKidney)
        {
            EnumHRRStatus status = EnumHRRStatus.HRR_SUCCESSED;
            double hrrRatio = 0;
            try
            {
                status = _echoCalculater.GetHepatoRenalRatio(image, rcLiver, rcKidney, out hrrRatio);
                if (status!= EnumHRRStatus.HRR_SUCCESSED)
                {
                    // 通知订阅者，预处理的结果有更新
                    NotifyProcessFinish?.Invoke(this, new UsHRRDetectUpdateEvent(status,
                        new HRRDetectResultPerImg(), new Dictionary<EnumProcessTime, int> (), new RawImage()));
                }
            }
            catch (Exception excep)
            {
                NotifyError?.Invoke(this, new ErrorEventArgs(excep));
            }
            return hrrRatio;
        }

        /// <summary>
        /// 主动销毁
        /// </summary>
        public void Dispose()
        {
            DoDispose();
            GC.SuppressFinalize(this);
            LogHelper.InfoLog("HepatoRenalEchoContrastDetect.Disposed manually.", string.Empty);
        }

        /// <summary>
        /// 析构
        /// </summary>
        ~UsHepatoRenalRatioDetect()
        {
            DoDispose();
            LogHelper.InfoLog("HepatoRenalEchoContrastDetect.Disposed by destructor.", string.Empty);
        }

        #endregion


        #region private funcs

        /// <summary>
        /// 对图像进行处理
        /// </summary>
        private void DoImageProcess()
        {
            while (!_disposing)
            {
                if (_inputImages.Count > 0)
                {
                    _inputImages.TryDequeue(out RawImage image);

                    // 如果队列里待处理的数据过多，则对该图不做处理，直接跳到下一幅图
                    if (_inputImages.Count >= _queueMaxSize)
                    {
                        image.Dispose();
                        continue;
                    }

                    try
                    {
                        // 让dispose的线程等待执行完毕后再销毁
                        _processFinishEvent.Reset();

                        var totalStartTime = Environment.TickCount;

                        var OraganSegStartTime = Environment.TickCount;
                        // 对当前图像进行推理
                        var result = _organSegProcess.EvaluateOneImage(image, _isCropped);
                        var OrganSegTime = Environment.TickCount - OraganSegStartTime;

                        // 可能会存在检测出其他脏器的情况，先判断是否肝脏和肾脏都被检测出，如有未检测到的情况，后续不作处理
                        List<DetectedOrgan> detectOrgans = new List<DetectedOrgan>();
                        for (int ni = 0; ni < result.Count; ni++)
                        {
                            var detectedOb = result[ni];
                            if (detectedOb.Organ == EnumOrgans.Liver || detectedOb.Organ == EnumOrgans.Kidney)
                            {
                                detectOrgans.Add(detectedOb);
                            }
                        }
                        SegResultPerOrgan[] segResult = new SegResultPerOrgan[detectOrgans.Count];
                        for (int ni = 0; ni < detectOrgans.Count; ni++)
                        {
                            var detectedOb = detectOrgans[ni];
                            segResult[ni] = new SegResultPerOrgan(detectedOb.Organ, detectedOb.Confidence, detectedOb.BoundingBox, detectedOb.Contours);
                        }
                        Dictionary<EnumOrgans, Rect> rois = new Dictionary<EnumOrgans, Rect>();
                        RawImage mask = new RawImage();
                        double ratio = 0;
                        
                        // 只有当肝肾都被检测到的时候才进行处理
                        if (detectOrgans.Count == 2)
                        {
                            EnumHRRStatus status = new EnumHRRStatus();
                            _echoAnalyser.Init(image, segResult[0].Contours[0], segResult[1].Contours[0]);
                            status = _echoAnalyser.ImagePreProcess(/*out RawImage maskTmp*/);
                            if (status != EnumHRRStatus.HRR_SUCCESSED)
                            {
                                // 通知订阅者，预处理的结果有更新
                                NotifyProcessFinish?.Invoke(this, new UsHRRDetectUpdateEvent(status,
                                    new HRRDetectResultPerImg(), new Dictionary<EnumProcessTime, int>(), new RawImage()));
                                _echoAnalyser.Dispose();
                                // 用过后的图像销毁
                                image.Dispose();
                                // 执行完毕了，dispose的线程可以开始销毁了
                                _processFinishEvent.Set();
                                continue;
                            }

                            mask = _echoAnalyser.GetHRRMask();
                            status = _echoAnalyser.HRRROIDetect(out Rect[] roisDec);
                            if (status != EnumHRRStatus.HRR_SUCCESSED)
                            {
                                // 通知订阅者，预处理的结果有更新
                                NotifyProcessFinish?.Invoke(this, new UsHRRDetectUpdateEvent(status,
                                    new HRRDetectResultPerImg(), new Dictionary<EnumProcessTime, int>(), new RawImage()));
                                _echoAnalyser.Dispose();
                                // 用过后的图像销毁
                                image.Dispose();
                                mask.Dispose();
                                // 执行完毕了，dispose的线程可以开始销毁了
                                _processFinishEvent.Set();
                                continue;
                            }

                            status = _echoCalculater.GetHepatoRenalRatio(image, roisDec[0], roisDec[1], out ratio);
                            if (status != EnumHRRStatus.HRR_SUCCESSED)
                            {
                                // 通知订阅者，预处理的结果有更新
                                NotifyProcessFinish?.Invoke(this, new UsHRRDetectUpdateEvent(status,
                                    new HRRDetectResultPerImg(), new Dictionary<EnumProcessTime, int>(), new RawImage()));
                                _echoAnalyser.Dispose();
                                // 用过后的图像销毁
                                image.Dispose();
                                mask.Dispose();
                                // 执行完毕了，dispose的线程可以开始销毁了
                                _processFinishEvent.Set();
                                continue;
                            }

                            _echoAnalyser.Dispose();
                            rois.Add(EnumOrgans.Liver, roisDec[0]);
                            rois.Add(EnumOrgans.Kidney, roisDec[1]);
                        }

                        // 用过后的图像销毁
                        image.Dispose();
                        // 执行完毕了，dispose的线程可以开始销毁了
                        _processFinishEvent.Set();

                        var totalProcessTime = Environment.TickCount - totalStartTime;
                        Dictionary<EnumProcessTime, int> timeElapsed = new Dictionary<EnumProcessTime, int>();
                        timeElapsed.Add(EnumProcessTime.OrganSegProcessTime, OrganSegTime);
                        timeElapsed.Add(EnumProcessTime.TotalTime, totalProcessTime);

                        // 通知订阅者，预处理的结果有更新
                        NotifyProcessFinish?.Invoke(this, new UsHRRDetectUpdateEvent(EnumHRRStatus.HRR_SUCCESSED, new HRRDetectResultPerImg(segResult, rois, ratio), timeElapsed, mask));
                        mask.Dispose();
                    }
                    catch (Exception excep)
                    {
                        _processFinishEvent.Set();
                        NotifyError?.Invoke(this, new ErrorEventArgs(excep));
                    }
                }
                else
                {
                    // 如果已经没有要处理的数据了，就等有新数据输入的时候再继续while循环
                    _waitImageEvent.Reset();
                    _waitImageEvent.WaitOne();
                }
            }
        }

        /// <summary>
        /// 销毁
        /// </summary>
        private void DoDispose()
        {
            if (!_disposing)
            {
                _disposing = true;
                _waitImageEvent.Set();
                _processFinishEvent.WaitOne();
                if (_organSegProcess != null)
                {
                    _organSegProcess.Dispose();
                    _organSegProcess.NotifyLog -= OnLogWrite;
                    _organSegProcess = null;
                }
                while (_inputImages.Count > 0)
                {
                    if (_inputImages.TryDequeue(out var input))
                    {
                        input?.Dispose();
                    }
                }
            }
        }

        /// <summary>
        /// 有log要记
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnLogWrite(object sender, LogEventArgs e)
        {
            NotifyLog?.Invoke(sender, e);
        }

        #endregion

    }
}