using CopyUSB.MyDB;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CopyUSB;
public class CopyList
{
	public string Func {  get; set; }
	public long length { get; set; }
	public FileInfo file { get; set; }
	public string des { get; set; }
}
public class FileCopy
{
	private static void ListFileInDic(DirectoryInfo source,DirectoryInfo target,List<(FileInfo,FileInfo)> values)
	{
		foreach (var file in source.GetFiles())
		{
		/*Debug.WriteLine(Path.Join(target.FullName, file.Name));*/
			try
			{
				values.Add((file, new FileInfo(Path.Join(target.FullName, file.Name))));
			}catch (Exception ex)
			{
				Debug.WriteLine(ex);
			}
		}
		foreach(var dir in source.GetDirectories())
		{
			try
			{
				ListFileInDic(dir, new DirectoryInfo(Path.Join(target.FullName, dir.Name)), values);
			}catch(Exception ex)
			{
				Debug.WriteLine(ex);
			}
		}
	}
	
	public static void Copy(string source,string des)
	{
		try
		{
			var sourceDir = new DirectoryInfo(source);
			var desDir = new DirectoryInfo(des);

			// 确保目标目录存在
			if (!desDir.Exists)
			{
				desDir.Create();
			}
			var cpFileList = new List<(FileInfo, FileInfo)>();
			ListFileInDic(sourceDir, desDir, cpFileList);
			var sortedFile = cpFileList.OrderBy(o=>o.Item1.Length).ToList();
			using (var fileInfoDb = new FileInfoDb())
			{
				foreach(var file in sortedFile)
				{
					try
					{
						var tryGetFileDb = fileInfoDb.Files.Where(w=>w.Path==file.Item2.FullName).FirstOrDefault();
						if (tryGetFileDb == null)
						{
							tryGetFileDb = new MyDB.Class.FileInfoTable();
							tryGetFileDb.NeedChange = true;
							tryGetFileDb.Path = file.Item2.FullName;
							tryGetFileDb.Size = file.Item1.Length;
							if (!file.Item2.Directory.Exists)
							{
								file.Item2.Directory.Create();
							}
							file.Item1.CopyTo(file.Item2.FullName,true);
							fileInfoDb.Files.Add(tryGetFileDb);
							Debug.WriteLine($"Copied and added into Db {file.Item1.FullName} --> {file.Item2.FullName}");
						}
						else
						{
							if(tryGetFileDb.Size == file.Item1.Length)
							{
								Debug.WriteLine($"Found Same file from db {file.Item1.FullName}");
							}
							else
							{
								file.Item1.CopyTo (file.Item2.FullName,true);
								tryGetFileDb.Size = (int)file.Item1.Length;
								tryGetFileDb.NeedChange= true;
								Debug.WriteLine($"Renew {file.Item1.FullName}");
							}
						}
					}catch (Exception ex)
					{
						Debug.WriteLine(ex.Message);
					}
				}
				fileInfoDb.SaveChanges();
			}
		}
		catch (Exception ex)
		{
			Debug.WriteLine(ex.ToString());
			/*Console.WriteLine($"Copy Error {source}");*/
			/*Console.WriteLine(ex.ToString());*/
		}
	}
	public static long DicFileNum(string source)
	{
		long num = 0;
		using (var fileInfoDb = new FileInfoDb())
		{
			num = fileInfoDb.Files.Where(w=>w.NeedChange==true).Count();
			/*FileNum(source,ref num);*/
			Debug.WriteLine($"Totle Dic Num is {num} (From Db)");
		}
		return num<0?0:num;
	}
	private static void FileNum(string source, ref long num)
	{
		try
		{
			var sourceDir = new DirectoryInfo(source);
			num += sourceDir.GetFiles().Length;
			//遍历目录
			foreach (var subDir in sourceDir.GetDirectories())
			{
				FileNum(subDir.FullName,ref num);
			}
		}
		catch (Exception ex)
		{
			Debug.WriteLine(ex.ToString());
			/*Console.WriteLine($"Copy Error {source}");*/
			/*Console.WriteLine(ex.ToString());*/
		}
	}
	public static void SimpleCopy(string des,string baseDic , ref Int64 doneNum)
	{
		/*try
		{*/
			var desDir = new DirectoryInfo(des);

			//数据库查找需要更改的数据
			using (var fileInfoDb = new FileInfoDb())
			{
				var allNeedChangeFile = fileInfoDb.Files.Where(w => w.NeedChange == true).OrderBy(o => o.Size).ToList();
				foreach (var file in allNeedChangeFile)
				{
					var desInfo = new FileInfo(Path.Join(des, file.Path.Replace(baseDic, "")));
					var fileInfo = new FileInfo(file.Path);
					if (!fileInfo.Exists)
					{
						Debug.WriteLine($"Cannot Find File In Computer {fileInfo.FullName}");
						file.NeedChange= false;
						continue;
					}
					if (!desInfo.Directory.Exists)
					{
					try
					{
						desInfo.Directory.Create();
					}catch(Exception ex)
					{
						Debug.WriteLine(ex.ToString());
					}
					}
					try
					{
						fileInfo.CopyTo(desInfo.FullName, true);
						fileInfo.Delete();
						file.NeedChange = false;
						Debug.WriteLine($"moved the file and marked into Db {fileInfo.FullName} --> {desInfo.FullName}");
					}
				catch(Exception ex)
					{
						Debug.WriteLine($"Error: moved the file and marked into Db {fileInfo.FullName} --> {desInfo.FullName}\n{ex.ToString()}");
					}
					
					doneNum++;
				}
				fileInfoDb.SaveChanges();
			}
		/*}
		catch (Exception ex)
		{
			Debug.WriteLine(ex.ToString());
			*//*Console.WriteLine($"Copy Error {source}");*/
			/*Console.WriteLine(ex.ToString());*//*
		}*/
	}
}