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

namespace GeneralTools
{
    public class FileReader
    {
        /// <summary>
        /// 获取指定目录下 所有指定类型的文件路径
        /// 例如 *.BMP|*.JPG|*.GIF|*.PNG   所有文件 *.*
        /// </summary>
        /// <param name="path"></param>
        /// <param name="filesType"></param>
        /// <returns></returns>
        public static List<string> GetPathAllFiles(string path, string filesType)
        {
            if (!Directory.Exists(path))
            {
                Debug.Log("未找到路径" + path);
                return new List<string>();
            }
            List<string> filesPath = new List<string>();
            string[] videotypeArr = filesType.Replace(" ", "").Split('|');
            for (int i = 0; i < videotypeArr.Length; i++)
            {
                string[] dirs = Directory.GetFiles(@path, videotypeArr[i]);
                for (int j = 0; j < dirs.Length; j++)
                {
                    filesPath.Add(dirs[j]);
                }
            }
            return filesPath;
        }
        /// <summary>
        /// 获取指定目录下 所有指定类型的文件路径,会查找子目录
        /// 例如 *.BMP|*.JPG|*.GIF|*.PNG   所有文件 *.*
        /// </summary>
        /// <param name="path"></param>
        /// <param name="filesType"></param>
        /// <returns></returns>
        public static List<string> GetPathAllFilesRoot(string path, string filesType)
        {
            List<string> filesPath = new List<string>();
            if (!Directory.Exists(path))
            {
                Debug.Log("未找到路径" + path);
            }
            else
            {
                filesPath = GetPathAllFilesRootPrivate(path, filesType);
            }
            return filesPath;
        }
        private static List<string> GetPathAllFilesRootPrivate(string path, string filesType)
        {
            List<string> filesPath = new List<string>();
            string[] videotypeArr = filesType.Replace(" ", "").Split('|');
            for (int i = 0; i < videotypeArr.Length; i++)
            {
                string[] dirs = Directory.GetFiles(@path, videotypeArr[i]);
                for (int j = 0; j < dirs.Length; j++)
                {
                    filesPath.Add(dirs[j]);
                }
            }
            string[] childDirs = Directory.GetDirectories(path);
            foreach (var childDir in childDirs)
            {
                filesPath.AddRange(GetPathAllFilesRootPrivate(childDir, filesType));
            }
            return filesPath;
        }
        /// <summary>
        /// 读取图片转成texture2d
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static Texture2D GetTexture(string path)
        {
            if (!File.Exists(path))
            {
                Debug.LogError("未找到路径" + path);
                return null;
            }
            FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);

            fs.Seek(0, SeekOrigin.Begin);

            byte[] bytes = new byte[fs.Length];

            fs.Read(bytes, 0, (int)fs.Length);

            fs.Close();

            fs.Dispose();

            fs = null;
            Texture2D t = new Texture2D(1, 1);

            t.LoadImage(bytes);
            t.name = Path.GetFileNameWithoutExtension(path);
            return t;
        }
        /// <summary>
        /// 读取路径下所有图片转成texture2d列表
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static List<Texture2D> GetTextures(string path, string filesType = "*.jpg|*.png")
        {
            if (!Directory.Exists(path))
            {
                Debug.LogError("未找到路径" + path);
                return new List<Texture2D>();
            }
            List<string> files = GetPathAllFiles(path, filesType);
            if (files.Count == 0)
            {
                Debug.LogError("未找到图片" + path);
                return null;
            }
            List<Texture2D> res = new List<Texture2D>();
            foreach (var item in files)

            {
                res.Add(GetTexture(item));
            }
            return res;
        }
        /// <summary>
        /// 读取txt转成string
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static string GetTxt(string path)
        {
            if (!File.Exists(path))
            {
                Debug.LogError("未找到路径" + path);
                return null;
            }
            StreamReader r = new StreamReader(path, Encoding.UTF8);
            string s = r.ReadToEnd();
            r.Close();
            r.Dispose();
            return s;
        }
        public static List<string> GetTxtLine(string path)
        {
            if (!File.Exists(path))
            {
                Debug.LogError("未找到路径" + path);
                return new List<string>();
            }
            List<string> temp = new List<string>();
            StreamReader r = new StreamReader(path, Encoding.UTF8);
            string s;
            while ((s = r.ReadLine()) != null)
            {
                if (!string.IsNullOrEmpty(s))
                {
                    temp.Add(s);
                }
            }
            r.Close();
            r.Dispose();
            return temp;
        }
        public static void DeleteDirectory(string path)
        {
            if (!Directory.Exists(path))
                return;
            string[] files = Directory.GetFiles(path);
            for (int i = 0; i < files.Length; i++)
            {
                File.Delete(files[i]);
            }
            string[] dirs = Directory.GetDirectories(path);
            for (int i = 0; i < dirs.Length; i++)
            {
                DeleteDirectory(dirs[i]);
            }
            Directory.Delete(path);
        }
    }
}