using Furion;
using Furion.Logging;
using Furion.RemoteRequest.Extensions;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Myshipping.Application.ConfigOption;
using Myshipping.Application.Entity;
using Myshipping.Core;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace Myshipping.Application
{
    /// <summary>
    /// 文件附件帮助类
    /// </summary>
    public static class FileAttachHelper
    {
        #region 转移文件
        /// <summary>
        /// 转移文件
        /// </summary>
        /// <param name="fileDictKey">文件目录KEY</param>
        /// <param name="sourceFilePath">源文件完整路径</param>
        /// <param name="batchNo">批次号</param>
        /// <param name="isLocalTempFile">是否生成本地文件</param>
        /// <param name="attachFileType">附件类型 bcfiles-BC文件</param>
        /// <returns>返回新的文件路径</returns>
        public static async Task<string> MoveFile(string fileDictKey,string sourceFilePath,string batchNo,
            bool isLocalTempFile = false,string attachFileType = "bcfiles")
        {
            var logger = Log.CreateLogger(nameof(FileAttachHelper));

            var fileCfg = App.GetOptions<BookingAttachOptions>();

            string fileRoot = string.Empty;

            if(fileCfg != null)
            {
                if(!isLocalTempFile)
                {
                    if (!string.IsNullOrWhiteSpace(fileCfg.basePath))
                    {
                        fileRoot = fileCfg.basePath;
                    }
                }
                else
                {
                    var opt = App.GetOptions<TempFileOptions>().Path;

                    if (!string.IsNullOrWhiteSpace(fileCfg.relativePath))
                    {
                        fileRoot = $"{Path.Combine(App.WebHostEnvironment.WebRootPath, opt)}";
                    }
                }
            }

            if (string.IsNullOrWhiteSpace(fileRoot))
                fileRoot = App.WebHostEnvironment.WebRootPath;

            string relativePath = fileCfg.relativePath;

            if (!string.IsNullOrWhiteSpace(attachFileType))
                relativePath += $"\\{attachFileType}";

            if (!string.IsNullOrWhiteSpace(fileDictKey))
                relativePath += $"\\{fileDictKey}";

            relativePath += $"\\{DateTime.Now.ToString("yyyyMMddHHmmss")}";

            string filePath = $"{fileRoot}\\{relativePath}";

            string fileFullName = $"{filePath}\\{new System.IO.FileInfo(sourceFilePath).Name}";

            if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
            {
                relativePath = relativePath.Replace("\\", "/");
                filePath = filePath.Replace("\\", "/");
                fileFullName = fileFullName.Replace("\\", "/");
            }

            logger.LogInformation("批次={no} 生成文件保存路径完成 路由={filePath} 服务器系统={system}", batchNo, filePath, 
                RuntimeInformation.OSDescription);

            //预先创建目录
            if (!Directory.Exists(filePath))
            {
                Directory.CreateDirectory(filePath);
            }

            if (sourceFilePath.StartsWith("http", StringComparison.OrdinalIgnoreCase) ||
                sourceFilePath.StartsWith("https", StringComparison.OrdinalIgnoreCase))
            {
                var bcStream = await sourceFilePath.GetAsStreamAsync();

                using (var fileStream = File.Create(fileFullName))
                {
                    await bcStream.CopyToAsync(fileStream);
                }
            }
            else
            {
                System.IO.FileStream file = new System.IO.FileStream(sourceFilePath, FileMode.Open, FileAccess.Read);

                using (var fileStream = File.Create(fileFullName))
                {
                    await file.CopyToAsync(fileStream);
                }
                
                file.Close();

                try
                {
                    //删除原文件
                    System.IO.File.Delete(sourceFilePath);
                }
                catch(Exception delEx)
                {
                    logger.LogInformation("批次={no} 删除文件异常 filepath={path} ex={ex}", batchNo, fileFullName, delEx.Message);
                }
            }

            logger.LogInformation("批次={no} 完成文件保存 filepath={path}", batchNo, fileFullName);

            string bookFilePath = string.Empty;

            if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
            {
                bookFilePath = System.Text.RegularExpressions.Regex.Match(fileFullName, relativePath.Replace("/", "\\/") + ".*").Value;
            }
            else
            {
                bookFilePath = System.Text.RegularExpressions.Regex.Match(fileFullName, relativePath.Replace("\\", "\\\\") + ".*").Value;
            }

            return bookFilePath;
        }
        #endregion

        #region 暂存Web请求文件暂存
        /// <summary>
        /// 暂存Web请求文件暂存
        /// </summary>
        /// <param name="fileDictKey">文件目录KEY</param>
        /// <param name="file">文件</param>
        /// <param name="batchNo">批次号</param>
        /// <param name="attachFileType">附件类型 bcfiles-BC文件</param>
        /// <returns>返回暂存文件路径</returns>
        public static async Task<string> TempSaveWebFile(string fileDictKey, IFormFile file, string batchNo,
            string attachFileType = "bcfiles")
        {
            var logger = Log.CreateLogger(nameof(FileAttachHelper));

            var opt = App.GetOptions<TempFileOptions>().Path;

            string filePath = Path.Combine(App.WebHostEnvironment.WebRootPath, opt);

            if (!string.IsNullOrWhiteSpace(attachFileType))
                filePath += $"\\{attachFileType}";

            if (!string.IsNullOrWhiteSpace(fileDictKey))
                filePath += $"\\{fileDictKey}";

            string fileFullName = $"{filePath}\\{file.FileName}";

            if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
            {
                filePath = filePath.Replace("\\", "/");

                fileFullName = fileFullName.Replace("\\", "/");
            }

            logger.LogInformation("批次={no} 生成文件保存路径完成 路由={filePath} 服务器系统={system}", batchNo, filePath, 
                RuntimeInformation.OSDescription);

            //预先创建目录
            if (!Directory.Exists(filePath))
            {
                Directory.CreateDirectory(filePath);
            }

            using (var fileStream = File.Create(fileFullName))
            {
                await file.CopyToAsync(fileStream);
            }

            return fileFullName;
        }
        #endregion
    }
}