using Store.Framework.Configs;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Store.Framework.Helpers
{
    /// <summary>
    /// 文件操作帮助类
    /// </summary>
    public class FileHelper
    {
        /// <summary>
        /// 获取文件MD5值
        /// </summary>
        /// <param name="FilePath"></param>
        /// <returns></returns>
        public static string GetFileMd5(string FilePath)
        {
            try
            {
                FileStream get_file = new FileStream(FilePath, FileMode.Open, FileAccess.Read, FileShare.Read);
                System.Security.Cryptography.MD5CryptoServiceProvider get_md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
                byte[] hash_byte = get_md5.ComputeHash(get_file);
                string resule = BitConverter.ToString(hash_byte);
                resule = resule.Replace("-", "");
                get_file.Close();
                return resule;
            }
            catch (Exception e)
            {
                return e.ToString();
            }
        }

        /// <summary>
        /// 读取所有内容 相对路径Or绝对路径
        /// </summary>
        /// <param name="file"></param>
        /// <returns></returns>
        public static string ReadAllText(string file)
        {
            if (!Path.IsPathRooted(file))
            {
                file = Path.Combine(GlobalConfig.AppDirectory, file);
            }
            if (File.Exists(file))
            {
                return _ReadAllText(file, Encoding.UTF8);
            }
            return string.Empty;
        }
        /// <summary>
        /// 读取所有内容 绝对路径
        /// </summary>
        /// <param name="file"></param>
        /// <returns></returns>
        public static string ReadAbsAllText(string file)
        {
            return _ReadAllText(file, Encoding.UTF8);
        }
        /// <summary>
        /// 读取所有内容 相对路径
        /// </summary>
        /// <param name="file"></param>
        /// <returns></returns>
        public static string ReadPartialAllText(string file)
        {
            string _file = Path.Combine(GlobalConfig.AppDirectory, file);
            return _ReadAllText(_file, Encoding.UTF8);
        }

        private static string _ReadAllText(string file, Encoding encoding)
        {
            if (File.Exists(file))
            {
                return File.ReadAllText(file, encoding);
            }
            else
            {
                throw new Exception($"缺失文件{file}");
            }
        }
    }
}