using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace FileUtility
{
    public class Program
    {
        public static void DeepCopy(DirectoryInfo source, DirectoryInfo target, params string[] excludePatterns)
        {
            if (target.FullName.Contains(source.FullName))
                return;

            // Go through the Directories and recursively call the DeepCopy Method for each one
            foreach (DirectoryInfo dir in source.GetDirectories())
            {
                var dirName = dir.Name;
                var shouldExclude = excludePatterns.Aggregate(false, (current, pattern) => current || Regex.Match(dirName, pattern).Success);

                if (!shouldExclude)
                    DeepCopy(dir, target.CreateSubdirectory(dir.Name), excludePatterns);
            }

            // Go ahead and copy each file to the target directory
            foreach (FileInfo file in source.GetFiles())
            {
                var fileName = file.Name;
                var shouldExclude = excludePatterns.Aggregate(false,
                                                              (current, pattern) =>
                                                              current || Regex.Match(fileName, pattern).Success);

                if (!shouldExclude)
                    file.CopyTo(Path.Combine(target.FullName, fileName));
            }
        }

        static void Main(string[] args)
        {
            DeepCopy(new DirectoryInfo(@"d:/test/b"), new DirectoryInfo(@"d:/test/a"));
            DeepCopy(new DirectoryInfo(@"d:/test/c"), new DirectoryInfo(@"d:/test/c/c.1"));
            DeepCopy(new DirectoryInfo(@"d:/test/1/"), new DirectoryInfo(@"d:/test/2/"), new string[] { ".*\.txt" });

            Console.WriteLine("复制成功...");
            Console.ReadKey();
        }
    }
}