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
{
	
	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();
			}
			
			using(var fileInfoDb = new FileInfoDb())
			{
				foreach (var file in sourceDir.GetFiles())
				{
					try
					{
						string destinationFile = Path.Combine(desDir.FullName, file.Name);
						var tryGetFileDbInfo = fileInfoDb.Files.Where(w => w.Path == destinationFile).FirstOrDefault();
						if (tryGetFileDbInfo != null)
						{
							if (tryGetFileDbInfo.Size == file.Length)
							{
								Debug.WriteLine($"Find the Same File In Db {destinationFile}");
								continue;
							}
							else
							{
								tryGetFileDbInfo.NeedChange = true;
								tryGetFileDbInfo.Size = file.Length;
								file.CopyTo(destinationFile, true);
								Debug.WriteLine($"renew {destinationFile} from Db");
							}
						}
						else
						{
							tryGetFileDbInfo = new MyDB.Class.FileInfoTable();
							tryGetFileDbInfo.Path = destinationFile;
							tryGetFileDbInfo.Size = file.Length;
							fileInfoDb.Files.Add(tryGetFileDbInfo);
							file.CopyTo(destinationFile, true);
							Debug.WriteLine($"new {destinationFile} into Db and Copy");
						}
						/*if (File.Exists(destinationFile))
						{
							var desFileInfo = new FileInfo(destinationFile);
							if (desFileInfo.Length != file.Length)
							{
								*//*Console.WriteLine($"Renew {file}  --> {destinationFile}");*//*
								copyList.Add((file.Length, file, destinationFile, "Renew"));
								*//*file.CopyTo(destinationFile, true);*//*
							}
							else
							{
								Debug.WriteLine($"Same {file}  --> {destinationFile} {file.Length / 1024 / 1024}MB");
								*//*copyList.Add((file, destinationFile, 0, "Same"));*//*
							}
						}
						else
						{
							*//*Console.WriteLine($"NewFile {file} --> {destinationFile}");*//*
							copyList.Add((file.Length, file, destinationFile, "NewFile"));
						}*/

					}catch(Exception ex)
					{
						Debug.WriteLine(ex.ToString());
					}
				}
				fileInfoDb.SaveChanges();
			}
			//遍历目录
			foreach (var subDir in sourceDir.GetDirectories())
			{
				Copy(subDir.FullName, Path.Combine(desDir.FullName, subDir.Name));
			}
		}
		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());*//*
		}*/
	}
}