using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using IStation.Untity;

namespace IStation.Application
{
    /// <summary>
    /// 处理文件辅助类
    /// </summary>
    public partial class FileHelper
    {

        #region Upload

        /// <summary>
        ///  上传文件 文件流形式
        /// </summary>
        /// <param name="suffix"></param>
        /// <param name="stream"></param>
        /// <returns></returns>
        public static string UploadFile(Stream stream, string suffix)
        {
            var root = ConfigHelper.DataPath;
            if (!Directory.Exists(root))
                Directory.CreateDirectory(root);
            var guid = GuidCreater.CreateN();
            var fileName = guid + suffix;
            var filePath = Path.Combine(root, fileName);
            StreamTransfer.ToFile(stream, filePath);
            return fileName;
        }

        /// <summary>
        /// 上传到子文件夹文件 文件流形式
        /// </summary>
        /// <param name="sub">子文件夹</param>
        /// <param name="suffix">文件拓展名</param>
        /// <param name="stream">文件流</param>
        /// <returns></returns>
        public static string UploadSubFile(string sub, Stream stream, string suffix)
        {
            string root;
            if (string.IsNullOrEmpty(sub))
            {
                root = ConfigHelper.DataPath;
            }
            else
            {
                root = Path.Combine(ConfigHelper.DataPath, sub);
            }
            if (!Directory.Exists(root))
                Directory.CreateDirectory(root);
            var guid = GuidCreater.CreateN();
            var fileName = guid + suffix;
            var filePath = Path.Combine(root, fileName);
            StreamTransfer.ToFile(stream, filePath);
            return fileName;
        }


        /// <summary>
        /// 上传文件 字节形式
        /// </summary>
        /// <param name="bytes">字节流</param>
        /// <param name="suffix">文件拓展名</param>
        /// <returns></returns>
        public static string UploadFile(byte[] bytes, string suffix)
        {
            string root = ConfigHelper.DataPath;
            if (!Directory.Exists(root))
                Directory.CreateDirectory(root);
            var guid = GuidCreater.CreateN();
            var fileName = guid + suffix;
            var filePath = Path.Combine(root, fileName);
            System.IO.File.WriteAllBytes(filePath, bytes);
            return fileName;
        }

        /// <summary>
        /// 上传到子文件夹文件 字节形式
        /// </summary>
        /// <param name="sub">子文件夹名</param>
        /// <param name="suffix">文件拓展名</param>
        /// <param name="bytes">字节数组</param>
        /// <returns></returns>
        public static string UploadSubFile(string sub, byte[] bytes, string suffix)
        {
            string root;
            if (string.IsNullOrEmpty(sub))
            {
                root = ConfigHelper.DataPath;
            }
            else
            {
                root = Path.Combine(ConfigHelper.DataPath, sub);
            }
            if (!Directory.Exists(root))
                Directory.CreateDirectory(root);
            var guid = GuidCreater.CreateN();
            var fileName = guid + suffix;
            var filePath = Path.Combine(root, fileName);
            System.IO.File.WriteAllBytes(filePath, bytes);
            return fileName;
        }


        #endregion

        #region Download

        /// <summary>
        /// 下载文件 文件流
        /// </summary>
        /// <param name="fileName">文件名称</param>
        /// <returns></returns>
        public static Stream DownloadFile(string fileName)
        {
            var root = ConfigHelper.DataPath;
            var filePath = Path.Combine(root, fileName);
            if (System.IO.File.Exists(filePath))
            {
                return StreamTransfer.FromFile(filePath);
            }
            return null;
        }

        /// <summary>
        /// 下载文件 文件流方式
        /// </summary>
        /// <param name="sub">子文件夹名</param>
        /// <param name="fileName">文件名称</param>
        /// <returns></returns>
        public static Stream DownloadSubFile(string sub, string fileName)
        {
            string root;
            if (string.IsNullOrEmpty(sub))
            {
                root = ConfigHelper.DataPath;
            }
            else
            {
                root = Path.Combine(ConfigHelper.DataPath, sub);
            }
            var filePath = Path.Combine(root, fileName);

            if (System.IO.File.Exists(filePath))
            {
                return StreamTransfer.FromFile(filePath);
            }
            return default;
        }

        /// <summary>
        /// 下载文件 字节形式
        /// </summary>
        /// <param name="fileName">文件名称</param>
        /// <returns></returns>
        public static byte[] DownloadFile2(string fileName)
        {
            var root = ConfigHelper.DataPath;
            var filePath = Path.Combine(root, fileName);
            if (System.IO.File.Exists(filePath))
            {
                return System.IO.File.ReadAllBytes(filePath);
            }
            return default;
        }

        /// <summary>
        /// 下载文件 字节形式
        /// </summary>
        /// <param name="sub">子文件夹名</param>
        /// <param name="fileName">文件名称</param>
        /// <returns></returns>
        public static byte[] DownloadSubFile2(string sub, string fileName)
        {
            string root;
            if (string.IsNullOrEmpty(sub))
            {
                root = ConfigHelper.DataPath;
            }
            else
            {
                root = Path.Combine(ConfigHelper.DataPath, sub);
            }
            var filePath = Path.Combine(root, fileName);
            if (System.IO.File.Exists(filePath))
            {
                return System.IO.File.ReadAllBytes(filePath);
            }
            return default;
        }



        #endregion

        #region Update

        /// <summary>
        /// 更新文件
        /// </summary>
        /// <param name="fileName">文件名称</param>
        /// <param name="stream">流</param>
        /// <param name="suffix">文件后缀</param>
        /// <returns></returns>
        public static string UpdateFile(string fileName, Stream stream, string suffix)
        {
            try
            {
                var code = UploadFile(stream, suffix);
                if (!string.IsNullOrEmpty(code))
                {
                    if (!string.IsNullOrEmpty(fileName))
                        Delete(fileName);
                }
                return code;
            }
            catch (Exception)
            {
                return default;
            }

        }

        /// <summary>
        /// 更新文件
        /// </summary>
        /// <param name="fileName">老文件名</param>
        /// <param name="suffix">文件后缀</param>
        /// <param name="bytes">字节流</param>
        /// <returns></returns>
        public static string UpdateFile2(string fileName, byte[] bytes, string suffix)
        {
            try
            {
                var code = UploadFile(bytes, suffix);
                if (!string.IsNullOrEmpty(code))
                {
                    if (!string.IsNullOrEmpty(fileName))
                        Delete(fileName);
                }
                return code;
            }
            catch (Exception)
            {
                return default;
            }
        }

        /// <summary>
        /// 更新文件
        /// </summary>
        /// <param name="sub">子文件夹</param>
        /// <param name="fileName">老文件名</param>
        /// <param name="suffix">文件后缀</param>
        /// <param name="stream">字节流</param>
        /// <returns></returns>
        public static string UpdateSubFile(string sub, string fileName, Stream stream, string suffix)
        {
            try
            {
                var code = UploadSubFile(sub, stream, suffix);
                if (!string.IsNullOrEmpty(code))
                {
                    if (!string.IsNullOrEmpty(fileName))
                        Delete(sub, fileName);
                }
                return code;
            }
            catch (Exception)
            {
                return null;
            }

        }


        /// <summary>
        /// 更新文件
        /// </summary>
        /// <param name="sub">子文件夹</param>
        /// <param name="fileName">老文件名</param>
        /// <param name="suffix">文件后缀</param>
        /// <param name="bytes">字节流</param>
        /// <returns></returns>
        public static string UpdateSubFile2(string sub, string fileName, byte[] bytes, string suffix)
        {
            try
            {
                var code = UploadSubFile(sub, bytes, suffix);
                if (!string.IsNullOrEmpty(code))
                {
                    if (!string.IsNullOrEmpty(fileName))
                        Delete(sub, fileName);
                }
                return code;
            }
            catch (Exception)
            {
                return null;
            }

        }

        #endregion

        #region Delete

        /// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="fileName">文件名称</param>
        /// <returns></returns>
        public static bool Delete(string fileName)
        {
            if (string.IsNullOrEmpty(fileName))
                return default;
            try
            {
                var root = ConfigHelper.DataPath;
                var filePath = System.IO.Path.Combine(root, fileName);
                if (System.IO.File.Exists(filePath))
                {
                    System.IO.File.Delete(filePath);
                }
            }
            catch (Exception)
            {
                return false;
            }
            return true;
        }

        /// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="sub">子文件名</param>
        /// <param name="fileName">文件名称</param>
        /// <returns></returns>
        public static bool Delete(string sub, string fileName)
        {
            if (string.IsNullOrEmpty(fileName))
                return default;
            string root;
            if (string.IsNullOrEmpty(sub))
            {
                root = ConfigHelper.DataPath;
            }
            else
            {
                root = Path.Combine(ConfigHelper.DataPath, sub);
            }
            var filePath = Path.Combine(root, fileName);
            try
            {
                if (System.IO.File.Exists(filePath))
                {
                    System.IO.File.Delete(filePath);
                }
            }
            catch (Exception)
            {
                return false;
            }

            return true;
        }

        #endregion

        #region Path

        /// <summary>
        /// 获取文件路径
        /// </summary>
        public static string GetFilePath(string fileName)
        {
            if (string.IsNullOrEmpty(fileName))
                return default;
            var root = ConfigHelper.DataPath;
            var filePath = System.IO.Path.Combine(root, fileName);
            return filePath;
        }

        /// <summary>
        /// 获取文件相对路径
        /// </summary>
        public static string GetRelatedFilePath(string fileName)
        {
            if (string.IsNullOrEmpty(fileName))
                return default;
            return $"{ConfigHelper.DataFolder}/{fileName}";
        }

        /// <summary>
        /// 获取文件路径
        /// </summary>
        public static string GetFilePath(string sub, string fileName)
        {
            if (string.IsNullOrEmpty(fileName))
                return default;
            string root;
            if (string.IsNullOrEmpty(sub))
            {
                root = ConfigHelper.DataPath;
            }
            else
            {
                root = Path.Combine(ConfigHelper.DataPath, sub);
            }
            var filePath = Path.Combine(root, fileName);
            return filePath;
        }

        /// <summary>
        /// 获取文件路径2
        /// </summary>
        public static string GetFilePath2(string sub, string fileName)
        {
            if (string.IsNullOrEmpty(fileName))
                return default;
            string root;
            if (string.IsNullOrEmpty(sub))
            {
                root = ConfigHelper.DataPath;
            }
            else
            {
                root = Path.Combine(ConfigHelper.DataPath, sub);
            }
            if (!Directory.Exists(root))
                Directory.CreateDirectory(root);
            var filePath = Path.Combine(root, fileName);
            return filePath;
        }

        /// <summary>
        /// 获取文件相对路径
        /// </summary>
        public static string GetRelatedFilePath(string sub, string fileName)
        {
            if (string.IsNullOrEmpty(fileName))
                return default;
            if (string.IsNullOrEmpty(sub))
                return GetRelatedFilePath(fileName);
            return $"{ConfigHelper.DataFolder}/{sub}/{fileName}";
        }

        #endregion



    }
}