using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace PushPlatform.Common.Util
{
    /// <summary>
    /// MD5
    /// </summary>
    public class MD5Helper
    {
        public static string getMd5Hash(string input)
        {
            // Create a new instance of the MD5CryptoServiceProvider object.
            using (MD5 md5Hasher = MD5.Create())
            {
                // Convert the input string to a byte array and compute the hash.
                byte[] data = md5Hasher.ComputeHash(Encoding.UTF8.GetBytes(input));
                // Create a new Stringbuilder to collect the bytes
                // and create a string.
                StringBuilder sBuilder = new StringBuilder();
                // Loop through each byte of the hashed data 
                // and format each one as a hexadecimal string.
                for (int i = 0; i < data.Length; i++)
                {
                    sBuilder.Append(data[i].ToString("x2"));
                }
                // Return the hexadecimal string.
                return sBuilder.ToString();
            }
        }

        /// <summary>
        /// 添加无规则之后的编号
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static string getMd5HashZh(string input)
        {
            return getMd5Hash(input + "w@qh%f^ffk*kdf(ldfl+lf-fdk");
        }

        public static string getMd5Hash(byte[] data)
        {
            // Create a new instance of the MD5CryptoServiceProvider object.
            using (MD5 md5Hasher = MD5.Create())
            {
                // Convert the input string to a byte array and compute the hash.
                data = md5Hasher.ComputeHash(data);
                // Create a new Stringbuilder to collect the bytes
                // and create a string.
                StringBuilder sBuilder = new StringBuilder();

                // Loop through each byte of the hashed data 
                // and format each one as a hexadecimal string.
                for (int i = 0; i < data.Length; i++)
                {
                    sBuilder.Append(data[i].ToString("x2"));
                }

                // Return the hexadecimal string.
                return sBuilder.ToString();
            }
        }
    }
}
