using Infrastructure.Extensions;
using Microsoft.Extensions.Configuration;
using Newtonsoft.Json;
using System;
using System.Security.Cryptography;
using System.Text;

namespace Infrastructure.Security
{
    public class EncryptionService : IEncryptionService
    {
        private readonly IConfiguration _configuration;

        public EncryptionService(IConfiguration configuration)
        {
            this._configuration = configuration;
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Security", "CA5350:不要使用弱加密算法", Justification = "<挂起>")]
        public string CreatePasswordHash(string password, string saltkey)
        {
            var saltAndPassword = String.Concat(password, saltkey);
            using var algorithm = SHA1.Create();
            var bytes = algorithm.ComputeHash(Encoding.UTF8.GetBytes(saltAndPassword));
            var result = string.Empty;
            var builder = new StringBuilder();
            builder.Append(result);
            foreach (var item in bytes)
            {
                builder.Append($"{item:x2}");
            }
            result = builder.ToString();
            return result;
        }

        public string CreateSalt()
        {
            var code = string.Empty;
            var builder = new StringBuilder();
            builder.Append(code);
            for (int i = 0; i < 6; i++)
            {
                var random = new byte[1];
                using var rg = RandomNumberGenerator.Create();
                rg.GetBytes(random);
                builder.Append(new Random(Convert.ToInt32(random[0])).Next(0, 9));
            }
            code = builder.ToString();
            return code;
        }

        public string EncryptObject(object obj)
        {
            return JsonConvert.SerializeObject(obj).DESEncrypt(this._configuration.GetSection("security").GetValue<string>("key"));
        }

        public T DecryptObject<T>(string value)
        {
            return JsonConvert.DeserializeObject<T>(value.DESDecrypt(this._configuration.GetSection("security").GetValue<string>("key")));
        }
    }
}