using System;
using System.Collections.Generic;
using System.IO;
using System.Security.Cryptography;

namespace UpdateServiceLibrary.Helper
{
    public class FileController
    {
        /// <summary>
        /// 获取文件哈希值
        /// </summary>
        /// <param name="fileInfo"></param>
        /// <returns></returns>
        public static string GetHashCode(FileInfo fileInfo)
        {
            var hash = SHA1.Create();
            byte[] hashcode;
            using (var fs = new FileStream(fileInfo.FullName, FileMode.Open))
            {
                hashcode = hash.ComputeHash(fs);
            }
            return BitConverter.ToString(hashcode);
        }


        /// <summary>
        /// 移动文件夹下所有文件与路径
        /// </summary>
        /// <param name="sourcePath"></param>
        /// <param name="destPath"></param>
        public static void MoveFolder(string sourcePath, string destPath)
        {
            if (Directory.Exists(sourcePath))
            {
                if (!Directory.Exists(destPath))
                {
                    //目标目录不存在则创建
                    try
                    {
                        Directory.CreateDirectory(destPath);
                    }
                    catch (Exception ex)
                    {
                        throw new Exception("创建目标目录失败：" + ex.Message);
                    }
                }
                //获得源文件下所有文件
                List<string> files = new List<string>(Directory.GetFiles(sourcePath));
                files.ForEach(c =>
                {
                    string destFile = Path.Combine(new string[] { destPath, Path.GetFileName(c) });
                    //覆盖模式
                    if (File.Exists(destFile))
                    {
                        File.Delete(destFile);
                    }
                    File.Move(c, destFile);
                });
                //获得源文件下所有目录文件
                List<string> folders = new List<string>(Directory.GetDirectories(sourcePath));

                folders.ForEach(c =>
                {
                    string destDir = Path.Combine(new string[] { destPath, Path.GetFileName(c) });
                    //采用递归的方法实现
                    MoveFolder(c, destDir);
                });
            }
            else
            {
                throw new DirectoryNotFoundException("源目录不存在！");
            }
        }
    }
}