using Aurora.Api;
using MilCommon;
using VisionCommon;
using Hermes;
using Matrox.MatroxImagingLibrary;
using System;
using System.IO;
using System.Drawing;
using System.Threading.Tasks;

namespace MilPattern {
    public class LineFinder : PatternBase, IPatternFinder, IDisposable {
        public string FILE_EXT_PATTERN { get; set; } = ".mrk";
        private MrkParamExt _paramExt = null;

        private Logger _logger;
        private PatternInfo _patternInfo;
        private MIL_ID _contextId = MIL.M_NULL;

        public LineFinder(PatternInfo patternInfo) {
            _patternInfo = patternInfo;
            _logger = new Logger(
                $"LineFinder_{patternInfo.GetPatternIndex()}");
            InitContext();
        }

        private void InitContext() {
            if (E1.OK != Load()) {
                Create();
            }
        }

        public string GetPatternFilePath(string patternName = PatternConstants.FILE_NAME_PATTERN) {
            return Path.Combine(new string[] {
                PatternConstants.GetSubPatternDirPath(_patternInfo),
                patternName + FILE_EXT_PATTERN
            });
        }

        public int Load() {
            var patternFilePath = GetPatternFilePath();

            if (!File.Exists(patternFilePath)) {
                _logger.I($"Pattern File does NOT exist : {patternFilePath}");
                return E2.NOT_FOUND;
            }

            _contextId = MilMeasureCommon.LoadContext(_patternInfo.MilSystemId, patternFilePath);
            _paramExt = LoadParamExt();

            return E1.OK;
        }

        public int Save() {
            var patternFilePath = GetPatternFilePath();
            var patternDirPath = Path.GetDirectoryName(patternFilePath);
            if (!Directory.Exists(patternDirPath)) {
                Directory.CreateDirectory(patternDirPath);
            }

            SaveParamExt(_paramExt);
            return MilMeasureCommon.SaveContext(_contextId, patternFilePath);
        }

        public int Create() {
            FreeContexts();
            _paramExt = LoadParamExt();
            if (_paramExt.IsStripe) {
                _contextId = MilMeasureLine.CreateStripeContext(_patternInfo.MilSystemId);
            }
            else {
                _contextId = MilMeasureLine.CreateContext(_patternInfo.MilSystemId);
            }
            return E1.OK;
        }

        public int Remove() {
            FreeContexts();

            var patternFilePath = GetPatternFilePath();
            var patternDirPath = Path.GetDirectoryName(patternFilePath);
            if (Directory.Exists(patternDirPath)) {
                Directory.Delete(patternDirPath, recursive: true);
            }

            return E1.OK;
        }

        public ROI GetFindROI() {
            return MilMeasureCommon.GetFindROI(_contextId);
        }

        public int SetFindROI(ROI findRoi) {
            return MilMeasureCommon.SetFindROI(_contextId, findRoi);
        }

        public IRunParam GetRunParam() {
            var runParam = MilMeasureLine.GetRunParam(_contextId) as LineFinderRunParam;
            runParam.MrkParamExt = _paramExt.Clone() as MrkParamExt;
            return runParam;
        }

        public int SetRunParam(IRunParam runParam) {
            _paramExt = ((LineFinderRunParam)runParam).MrkParamExt.Clone() as MrkParamExt;
            return MilMeasureLine.SetRunParam(_contextId, runParam);
        }

        public PatternResult Find(object image) {
            return MilMeasureLine.Find(_contextId, (MIL_ID)image);
        }

        public PatternResult Find(object image, ROI findRoi) {
            return MilMeasureLine.Find(_contextId, (MIL_ID)image, findRoi);
        }

        public PatternResult GetNotFoundPatternResult() {
            return MilMeasureLine.GetNotFoundPatternResult();
        }

        public object GetTool() {
            return _contextId;
        }

        public void Draw(
            PatternResult patternResult, ICameraDisplay cameraDisplay, bool isFixturePattern = false) {

            if (patternResult.Results == null) {
                _logger.FuncE("patternResult.Results is null.");
                return;
            }

            Parallel.ForEach(patternResult.Results, baseResult => {
                var lineFinderResult = baseResult as LineFinderResult;
                if (lineFinderResult.Status == eFoundStatus.FoundOK) {
                    MilMeasureLine.Draw((MIL_ID)lineFinderResult.ContextId, cameraDisplay as IMilCameraDisplay);
                    MilMeasureLine.DrawTextForMulti(lineFinderResult, cameraDisplay as IMilCameraDisplay);
                }
            });
        }

        public Bitmap GetThumbnail() {
            MIL_ID thumnailImage = MIL.M_NULL;
            try {
                var imageSize = ThumbnailUtil.GetImageSize();
                thumnailImage = MilEnvironment.GetCompatibleImageBuffer(
                    imageSize, _patternInfo.MilSystemId);
                MilEnvironment.ClearImage(thumnailImage);

                var findRoi = GetFindROI();
                var center = MilEnvironment.GetImageCenter(thumnailImage);

                MIL.MgraRectAngle(
                    MIL.M_DEFAULT, thumnailImage,
                    center.X,
                    center.Y,
                    1,
                    imageSize.Height * 1.2,
                    0,
                    MIL.M_CENTER_AND_DIMENSION + MIL.M_FILLED);

                MIL.MimRotate(thumnailImage, thumnailImage, findRoi.Angle.Degree,
                    MIL.M_DEFAULT, MIL.M_DEFAULT, MIL.M_DEFAULT, MIL.M_DEFAULT, MIL.M_NEAREST_NEIGHBOR);

                return MilEnvironment.ConvertToBitmap(thumnailImage);
            }
            catch (Exception e) {
                _logger.FuncE(e.Message);
            }
            finally {
                MilEnvironment.FreeImage(thumnailImage);
            }

            return ThumbnailUtil.GetDefaultImage();
        }

        #region IDisposible
        public void Dispose() {
            FreeContexts();
        }

        private void FreeContexts() {
            MilMeasureCommon.FreeContext(_contextId);

            _contextId = MIL.M_NULL;
        }
        #endregion


        #region LineFinder Specific
        public bool IsParamExtExist() {
            return MrkParamExt.Exists(PatternConstants.GetSubPatternDirPath(_patternInfo));
        }

        internal MrkParamExt LoadParamExt() {
            return MrkParamExt.Load(PatternConstants.GetSubPatternDirPath(_patternInfo));
        }

        internal int SaveParamExt(MrkParamExt mrkParamExt) {
            return MrkParamExt.Save(
                PatternConstants.GetSubPatternDirPath(_patternInfo),
                mrkParamExt);
        }
        #endregion
    }
}