using DocumentFormat.OpenXml.EMMA;
using FellowOakDicom;
using IRaCIS.Core.Application.Helper;
using MassTransit;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using static IRaCIS.Core.Domain.Share.StaticData;

namespace IRaCIS.Core.Application.Service
{

    /// <summary>
    /// 项目影像后台下载，不打包
    /// </summary>
    /// <param name="_trialRepository"></param>
    /// <param name="_oSSService"></param>
    [ApiExplorerSettings(GroupName = "Common")]
    public class BackDownloadService(IRepository<Trial> _trialRepository, IOSSService _oSSService, IWebHostEnvironment _hostEnvironment) : BaseService
    {


        public async Task<IResponseOutput> DownloadTrialImage(Guid trialId)
        {

            var downloadInfo = _trialRepository.Where(t => t.Id == trialId).Select(t => new
            {
                t.ResearchProgramNo,

                VisitList = t.SubjectVisitList.Select(sv => new
                {
                    TrialSiteCode = sv.TrialSite.TrialSiteCode,
                    SubjectCode = sv.Subject.Code,
                    VisitName = sv.VisitName,
                    StudyList = sv.StudyList.Select(u => new
                    {
                        u.PatientId,
                        u.StudyTime,
                        u.StudyCode,

                        SeriesList = u.SeriesList.Select(z => new
                        {
                            z.Modality,

                            InstancePathList = z.DicomInstanceList.Select(k => new
                            {
                                k.Path
                            })
                        })

                    }),

                    NoneDicomStudyList = sv.NoneDicomStudyList.Select(nd => new
                    {
                        nd.Modality,
                        nd.StudyCode,
                        nd.ImageDate,

                        FileList = nd.NoneDicomFileList.Select(file => new
                        {
                            file.FileName,
                            file.Path,
                            file.FileType
                        })
                    })
                }).ToList()

            }).FirstOrDefault();


            if (downloadInfo != null)
            {

                var rootFolder = FileStoreHelper.GetDonwnloadImageFolder(_hostEnvironment);

                // 创建一个临时文件夹来存放文件
                string trialFolderPath = Path.Combine(rootFolder, $"{downloadInfo.ResearchProgramNo}_{NewId.NextGuid()}");
                Directory.CreateDirectory(trialFolderPath);

                foreach (var visitItem in downloadInfo.VisitList)
                {
                    if (visitItem.StudyList.Count() == 0 && visitItem.NoneDicomStudyList.Count() == 0)
                    {
                        continue;
                    }

                    #region 处理 中心，受试者dicom non-dicom 文件夹层级

                    var siteFolderPath = Path.Combine(trialFolderPath, visitItem.TrialSiteCode);
                    if (!Directory.Exists(siteFolderPath))
                    {
                        Directory.CreateDirectory(siteFolderPath);
                    }

                    //var subjectDicomFolderPath = Path.Combine(siteFolderPath, $"{visitItem.SubjectCode}_{visitItem.VisitName}_DICOM");
                    //var subjectNoneDicomFolderPath = Path.Combine(siteFolderPath, $"{visitItem.SubjectCode}_{visitItem.VisitName}_Non-DICOM");

                    //if (visitItem.NoneDicomStudyList.Count() > 0)
                    //{
                    //    Directory.CreateDirectory(subjectNoneDicomFolderPath);
                    //}
                    //if (visitItem.StudyList.Count() > 0)
                    //{
                    //    Directory.CreateDirectory(subjectDicomFolderPath);
                    //}

                    #endregion


                    foreach (var studyInfo in visitItem.StudyList)
                    {
                        // 遍历 Series
                        foreach (var seriesInfo in studyInfo.SeriesList)
                        {
                            string studyDicomFolderPath = Path.Combine(siteFolderPath, $"{visitItem.SubjectCode}_{visitItem.VisitName}_DICOM", $"{studyInfo.StudyCode}_{studyInfo.StudyTime?.ToString("yyyy-MM-dd")}_{seriesInfo.Modality}");

                            // 创建 影像 文件夹
                            Directory.CreateDirectory(studyDicomFolderPath);

                            // 遍历 InstancePathList
                            foreach (var instanceInfo in seriesInfo.InstancePathList)
                            {
                                // 复制文件到相应的文件夹
                                string destinationPath = Path.Combine(studyDicomFolderPath, Path.GetFileName(instanceInfo.Path));

                                //下载到当前目录
                                await _oSSService.DownLoadFromOSSAsync(instanceInfo.Path, destinationPath);
                            }
                        }

                        foreach (var noneDicomStudy in visitItem.NoneDicomStudyList)
                        {
                            string studyNoneDicomFolderPath = Path.Combine(siteFolderPath, $"{visitItem.SubjectCode}_{visitItem.VisitName}_Non-DICOM", $"{noneDicomStudy.StudyCode}_{noneDicomStudy.ImageDate.ToString("yyyy-MM-dd")}_{noneDicomStudy.Modality}");

                            Directory.CreateDirectory(studyNoneDicomFolderPath);

                            foreach (var file in noneDicomStudy.FileList)
                            {
                                string destinationPath = Path.Combine(studyNoneDicomFolderPath, Path.GetFileName(file.FileName));

                                //下载到当前目录
                                await _oSSService.DownLoadFromOSSAsync(HttpUtility.UrlDecode(file.Path), destinationPath);
                            }
                        }
                    }


                }



            }

            return ResponseOutput.Ok();


        }

    }

}