using IRaCIS.Core.Domain.Share;
using IRaCIS.Core.Infrastructure;
using Microsoft.AspNetCore.Hosting;
using Newtonsoft.Json.Linq;
using System.Globalization;
using System.Text.RegularExpressions;

namespace IRaCIS.Core.Application.Helper;

public static class FileStoreHelper
{

    //处理文件名  压缩包，或者目录类的  会带上相对路径
    public static (string TrustedFileNameForFileStorage, string RealName) GetStoreFileName(string fileName, bool isChangeToPdfFormat = false)
    {

        //带目录层级，需要后端处理前端的路径
        if (fileName.Contains("\\"))
        {
            fileName = fileName.Split("\\").Last();
        }

        if (fileName.Contains("/"))
        {
            fileName = fileName.Split("/").Last();
        }

        var matchResult = Regex.Match(fileName, @"[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}");

        //如果有guid 
        if (matchResult.Success)
        {
            fileName = fileName.Replace($"{matchResult.Value}", "");
        }


        var trustedFileNameForFileStorage = string.Empty;

        if (isChangeToPdfFormat == false)
        {
            trustedFileNameForFileStorage = Guid.NewGuid().ToString() + fileName;

        }
        else
        {
            trustedFileNameForFileStorage = Guid.NewGuid().ToString() + Path.GetFileNameWithoutExtension(fileName) + ".pdf";
        }

        return (trustedFileNameForFileStorage, fileName);
    }

    //API  vue  部署目录
    public static string GetIRaCISRootPath(IWebHostEnvironment _hostEnvironment)
    {
        string parentDirectory = Path.GetFullPath(Path.Combine(_hostEnvironment.ContentRootPath, ".."));

        return parentDirectory;

    }


    //获取环境存储根目录
    public static string GetIRaCISRootDataFolder(IWebHostEnvironment _hostEnvironment)
    {
        var rootPath = GetIRaCISRootPath(_hostEnvironment);

        var rootFolder = Path.Combine(rootPath, StaticData.Folder.IRaCISDataFolder);

        return rootFolder;
    }

    //根据相对路径  获取具体文件物理地址
    public static string GetPhysicalFilePath(IWebHostEnvironment _hostEnvironment, string relativePath)
    {
        var rootPath = GetIRaCISRootPath(_hostEnvironment);

        var physicalFilePath = Path.Combine(rootPath, relativePath.TrimStart('/'));

        return physicalFilePath;
    }


    #region 修改后留存


    public static (string PhysicalPath, string RelativePath) GetSystemFileUploadPath(IWebHostEnvironment _hostEnvironment, string templateFolderName, string fileName)
    {
        var rootPath = FileStoreHelper.GetIRaCISRootDataFolder(_hostEnvironment);

        //文件类型路径处理
        var uploadFolderPath = Path.Combine(rootPath, StaticData.Folder.SystemDataFolder, templateFolderName);
        if (!Directory.Exists(uploadFolderPath)) Directory.CreateDirectory(uploadFolderPath);


        var (trustedFileNameForFileStorage, fileRealName) = FileStoreHelper.GetStoreFileName(fileName);


        var relativePath = $"/{StaticData.Folder.IRaCISDataFolder}/{StaticData.Folder.SystemDataFolder}/{templateFolderName}/{trustedFileNameForFileStorage}";

        var serverFilePath = Path.Combine(uploadFolderPath, trustedFileNameForFileStorage);

        return (serverFilePath, relativePath);
    }

    public static (string PhysicalPath, string RelativePath) GetOtherFileUploadPath(IWebHostEnvironment _hostEnvironment, string templateFolderName, string fileName)
    {
        var rootPath = FileStoreHelper.GetIRaCISRootDataFolder(_hostEnvironment);

        //文件类型路径处理
        var uploadFolderPath = Path.Combine(rootPath, StaticData.Folder.OtherDataFolder, templateFolderName);
        if (!Directory.Exists(uploadFolderPath)) Directory.CreateDirectory(uploadFolderPath);


        var (trustedFileNameForFileStorage, fileRealName) = FileStoreHelper.GetStoreFileName(fileName);


        var relativePath = $"/{StaticData.Folder.IRaCISDataFolder}/{StaticData.Folder.OtherDataFolder}/{templateFolderName}/{trustedFileNameForFileStorage}";

        var serverFilePath = Path.Combine(uploadFolderPath, trustedFileNameForFileStorage);

        return (serverFilePath, relativePath);
    }


    #endregion


    //通过编码获取通用文档具体物理路径  

    public static async Task<(string PhysicalPath, string FileName)> GetCommonDocPhysicalFilePathAsync(IWebHostEnvironment _hostEnvironment, IRepository<CommonDocument> _commonDocumentRepository, string code)
    {
        var doc = await _commonDocumentRepository.FirstOrDefaultAsync(t => t.Code == code);

        var isEn_US = CultureInfo.CurrentCulture.Name != StaticData.CultureInfo.zh_CN;
        if (doc == null)
        {
            //---数据库没有找到对应的数据模板文件,请联系系统运维人员。
            throw new BusinessValidationFailedException(I18n.T("FileStore_TemplateFileNotFound"));
        }

        var filePath = FileStoreHelper.GetPhysicalFilePath(_hostEnvironment, doc.Path);

        if (!System.IO.File.Exists(filePath))
        {
            //---数据模板文件存储路径上未找对应文件,请联系系统运维人员。
            throw new BusinessValidationFailedException(I18n.T("FileStore_TemplateFileStoragePathInvalid"));
        }

        return (filePath, isEn_US ? doc.Name.Trim('/') : doc.NameCN.Trim('/'));
    }


    /// <summary>
    /// 写文件导到磁盘
    /// </summary>
    /// <param name="stream">流</param>
    /// <param name="path">文件保存路径</param>
    /// <returns></returns>
    public static async Task<int> WriteFileAsync(System.IO.Stream stream, string path)
    {
        const int FILE_WRITE_SIZE = 84975;//写出缓冲区大小
        int writeCount = 0;
        using (FileStream fileStream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.Write, FILE_WRITE_SIZE, true))
        {
            byte[] byteArr = new byte[FILE_WRITE_SIZE];
            int readCount = 0;
            while ((readCount = await stream.ReadAsync(byteArr, 0, byteArr.Length)) > 0)
            {
                await fileStream.WriteAsync(byteArr, 0, readCount);
                writeCount += readCount;
            }
        }
        return writeCount;
    }


    // 获取通用文档存放路径（excel模板 ）

    public static (string PhysicalPath, string RelativePath) GetCommonDocPath(IWebHostEnvironment _hostEnvironment, string fileName)
    {
        var rootPath = FileStoreHelper.GetIRaCISRootDataFolder(_hostEnvironment);

        //文件类型路径处理
        var uploadFolderPath = Path.Combine(rootPath, StaticData.Folder.SystemDataFolder, StaticData.Folder.DataTemplate);
        if (!Directory.Exists(uploadFolderPath)) Directory.CreateDirectory(uploadFolderPath);


        var (trustedFileNameForFileStorage, fileRealName) = FileStoreHelper.GetStoreFileName(fileName);


        var relativePath = $"/{StaticData.Folder.IRaCISDataFolder}/{StaticData.Folder.SystemDataFolder}/{StaticData.Folder.DataTemplate}/{trustedFileNameForFileStorage}";

        var serverFilePath = Path.Combine(uploadFolderPath, trustedFileNameForFileStorage);

        return (serverFilePath, relativePath);
    }

    // 获取 入组确认 PD 进展发送邮件Word|PDF 存放路径

    public static (string PhysicalPath, string RelativePath, string FileRealName) GetSubjectEnrollConfirmOrPDEmailPath(IWebHostEnvironment _hostEnvironment, string fileName, Guid trialId, Guid trialSiteId, Guid subjectId, bool isChangeToPdfFormat = false)
    {
        var rootPath = FileStoreHelper.GetIRaCISRootDataFolder(_hostEnvironment);

        string uploadFolderPath = Path.Combine(rootPath, StaticData.Folder.TrialDataFolder, trialId.ToString(), trialSiteId.ToString(), subjectId.ToString());

        if (!Directory.Exists(uploadFolderPath)) Directory.CreateDirectory(uploadFolderPath);

        var (trustedFileNameForFileStorage, fileRealName) = FileStoreHelper.GetStoreFileName(fileName, isChangeToPdfFormat);


        var relativePath = $"/{StaticData.Folder.IRaCISDataFolder}/{StaticData.Folder.TrialDataFolder}/{trialId}/{trialSiteId}/{subjectId}/{trustedFileNameForFileStorage}";

        var serverFilePath = Path.Combine(uploadFolderPath, trustedFileNameForFileStorage);

        return (serverFilePath, relativePath, fileRealName);
    }


    public static string GetSubjectVisitDicomFolderPhysicalPath(IWebHostEnvironment _hostEnvironment, Guid trialId, Guid siteId, Guid subjectId, Guid subjectVisitId)
    {
        var rootPath = FileStoreHelper.GetIRaCISRootDataFolder(_hostEnvironment);

        return Path.Combine(rootPath, StaticData.Folder.TrialDataFolder, trialId.ToString(), siteId.ToString(), subjectId.ToString(), subjectVisitId.ToString(), StaticData.Folder.DicomFolder);
    }

    public static (string PhysicalPath, string RelativePath) GetDicomInstanceFilePath(IWebHostEnvironment _hostEnvironment, Guid trialId, Guid subjectId, Guid subjectVisitId, Guid studyId, Guid instanceId)
    {
        #region 切换存储前
        //var rootPath = FileStoreHelper.GetIRaCISRootDataFolder(_hostEnvironment);
        #endregion
        var rootPath = Path.Combine(FileStoreHelper.GetBestStoreDisk(_hostEnvironment), StaticData.Folder.IRaCISDataFolder);



        //加入访视层级  和Data
        var path = Path.Combine(rootPath, StaticData.Folder.TrialDataFolder, trialId.ToString(),
             subjectId.ToString(), subjectVisitId.ToString(), StaticData.Folder.DicomFolder, studyId.ToString());

        if (!Directory.Exists(path))
        {
            Directory.CreateDirectory(path);
        }

        var physicalPath = Path.Combine(path, instanceId.ToString());

        var relativePath = $"/{StaticData.Folder.IRaCISDataFolder}/{StaticData.Folder.TrialDataFolder}/{trialId}/{subjectId}/{subjectVisitId}/{StaticData.Folder.DicomFolder}/{studyId}/{instanceId}";

        //var physicalPath = Path.Combine(path, instanceId.ToString() + ".dcm");

        //var relativePath = $"/{StaticData.Folder.IRaCISDataFolder}/{StaticData.Folder.TrialDataFolder}/{trialId}/{siteId}/{subjectId}/{subjectVisitId}/{StaticData.Folder.DicomFolder}/{studyId}/{instanceId}.dcm";

        return (physicalPath, relativePath);
    }

    public static string GetBestStoreDisk(IWebHostEnvironment _hostEnvironment)
    {

        var json = File.ReadAllText(Path.Combine(_hostEnvironment.ContentRootPath, "appsettings.json"));

        JObject jsonObject = (JObject.Parse(json, new JsonLoadSettings() { CommentHandling = CommentHandling.Load })).IfNullThrowException();

        int switchingRatio = 80;

        try
        {
            switchingRatio = (int)jsonObject["IRaCISImageStore"]["SwitchingRatio"];
        }
        catch (Exception e)
        {

            //---解析Json文件配置出现问题
            throw new BusinessValidationFailedException(I18n.T("SysMon_JsonConfig") + e.Message);
        }

        //默认存储的路径
        var defaultStoreRootFolder = FileStoreHelper.GetIRaCISRootPath(_hostEnvironment);


        DriveInfo defaultDrive = new DriveInfo(Path.GetPathRoot(defaultStoreRootFolder));

        var drives = DriveInfo.GetDrives().Where(t => !t.Name.Contains("C") && !t.Name.Contains("c"))
                        .Where(d => d.DriveType == DriveType.Fixed && d.IsReady)
                        //剩余空间最多的
                        .OrderByDescending(d => d.AvailableFreeSpace)

                        //存储空间相同，则按照按照总空间从大到小排序
                        .ThenByDescending(d => d.TotalSize - d.TotalFreeSpace);

        var bestDrive = drives.FirstOrDefault();
        var bestStoreRootFolder = string.Empty;

        //仅仅只有C 盘
        if (bestDrive == null || ((double)(defaultDrive.TotalSize - defaultDrive.TotalFreeSpace) / defaultDrive.TotalSize) * 100 < switchingRatio)
        {
            bestStoreRootFolder = defaultStoreRootFolder;
        }
        else
        {
            bestStoreRootFolder = Path.Combine(bestDrive?.RootDirectory.FullName, _hostEnvironment.EnvironmentName);
        }

        if (!Directory.Exists(bestStoreRootFolder))
        {
            Directory.CreateDirectory(bestStoreRootFolder);
        }

        return bestStoreRootFolder;

    }








}