using CSFrameworkV5.Core.Common;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace CSFrameworkV5.Core.Common
{
    /// <summary>
    /// 平台支持的对称加密类型
    /// </summary>
    public class KeyProvider
    {
        /// <summary>
        /// 预设密钥，初始化系统时设置
        /// </summary>
        public static string DefaultKey { get; set; }

        /// <summary>
        /// 预设偏移量，初始化系统时设置
        /// </summary>
        public static string DefaultIV { get; set; }

        /// <summary>
        /// 预设对称加密工具
        /// </summary>
        public static IKeyProvider Default { get; set; }
    }

    /// <summary>
    /// 对称加密密钥接口
    /// </summary>
    public interface IKeyProvider
    {
        /// <summary>
        /// 密钥名称
        /// </summary>
        string CryptorName { get; }

        string Key { get; }

        string IV { get; }

        string Encrypt(string content);

        string Decrypt(string content);
    }

    public class KeyProviderRijndael : IKeyProvider
    {
        private string _Key = "";
        private string _IV = "";

        public KeyProviderRijndael(string key, string iv)
        {
            _Key = key;
            _IV = iv;
        }

        public string CryptorName => "Rijndael";

        public string Key => _Key;

        public string IV => _IV;

        public string Encrypt(string content)
        {
            return CryptoHelper.RijndaelEncrypt(content, _Key, _IV);
        }

        public string Decrypt(string content)
        {
            return CryptoHelper.RijndaelDecrypt(content, _Key, _IV);
        }
    }

    //public class KeyProviderTripleDES : IKeyProvider
    //{
    //    private string _Key = "";
    //    private string _IV = "";

    //    public KeyProviderTripleDES(string key, string iv)
    //    {
    //        this._Key = key;
    //        this._IV = iv;
    //    }

    //    public string CryptorName { get { return "TripleDES"; } }

    //    public string Key { get { return _Key; } }

    //    public string IV { get { return _IV; } }

    //    public string Encrypt(string content)
    //    {
    //        return CryptoHelper.TripleDESEncrypt(content, _Key, _IV);
    //    }

    //    public string Decrypt(string content)
    //    {
    //        return CryptoHelper.TripleDESDecrypt(content, _Key, _IV);
    //    }
    //}

    public class KeyProviderRSA : IKeyProvider
    {
        private string _Key = "";
        private string _IV = "";

        public KeyProviderRSA(string publicKey)
        {
            _Key = publicKey;
        }

        public string CryptorName => "RSA";

        public string Key => _Key;

        public string IV => _IV;

        public string Encrypt(string content)
        {
            return CryptoHelper.RSAEncrypt(content, _Key);
        }

        public string Decrypt(string content)
        {
            return CryptoHelper.RSADecrypt(content, _Key);
        }
    }
}