using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using System.IO;
using System.Text;

namespace YKMoon.IO
{
    public partial class IOTools
    {
        #region Get
        public static byte[] GetFileBytes(string fullPath)
		{
			try {
				if(!File.Exists(fullPath))
					return null;
				FileStream fs = File.OpenRead(fullPath);
				if(fs == null)
					throw new Exception(string.Format("FileStream is null file : {0}", fullPath));
				long length = fs.Length;
				byte[] buffer = new byte[length];
				fs.Read(buffer, 0, (int)length);
				fs.Close();
				return buffer;
			} catch(Exception e) {
				Debug.LogErrorFormat("GetFileBytes is error : {0}", e.ToString());
			}
			return null;
		}
		public static string GetFileStringByPath(string fullPath)
		{
			try {
				if(!File.Exists(fullPath))
					return null;
				return Encoding.UTF8.GetString(File.ReadAllBytes(fullPath));
			} catch(Exception e) {
				Debug.LogErrorFormat("GetFileStringByPath is error : {0}", e.ToString());
			}
			return "";
		}
		public static FileStream GetFileStream(string fullPath)
		{
			try {
				if(!File.Exists(fullPath))
					return null;
				FileStream fs = File.OpenRead(fullPath);
				if(fs == null)
					throw new Exception(string.Format("FileStream is null file : {0}", fullPath));
				return fs;
			} catch(Exception e) {
				Debug.LogErrorFormat("GetFileStream is error : {0}", e.ToString());
			}
			return null;
		}
		#endregion

		#region Save

		public static void CreateFile(string fileFullPath, byte[] buffer)
		{
			if(string.IsNullOrEmpty(fileFullPath))
				return;
			string path = Path.GetDirectoryName(fileFullPath).Replace("\\", "/");
			if(!string.IsNullOrEmpty(path) && !Directory.Exists(path))
				Directory.CreateDirectory(path);
			if(File.Exists(fileFullPath))
				File.Delete(fileFullPath);
			FileStream fs = new FileStream(fileFullPath, FileMode.Create);
			fs.Write(buffer, 0, buffer.Length);
			fs.Flush();
			fs.Close();
		}

		#endregion

		/// 删除多个文件//
		public static void DelFiles(string sourceFolder, string type, List<string> detach)
		{
			if(!System.IO.Directory.Exists(sourceFolder))
				return;
			string[] files = System.IO.Directory.GetFiles(sourceFolder, type);
			for(int i = 0; i < files.Length; i++) {
				string file = files[i];
				string name = System.IO.Path.GetFileName(file);
				if(detach == null || !detach.Contains(name))
					System.IO.File.Delete(file);
			}
		}
		/// 删除多个文件//
		public static void DelFiles(string sourceFolder, string type)
		{
			if(!System.IO.Directory.Exists(sourceFolder))
				return;
			string[] files = System.IO.Directory.GetFiles(sourceFolder, type);
			for(int i = 0; i < files.Length; i++) {
				string file = files[i];
				System.IO.File.Delete(file);
			}
		}
		/// 删除单个文件//
		public static void DelFile(string sourceFile)
		{
			if(File.Exists(sourceFile))
				File.Delete(sourceFile);
		}
	}
}