using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Text;
using Microsoft.IdentityModel.Tokens;
using Newtonsoft.Json;

namespace Bunny.Common.Utils.Jwt;

public static partial class JwtUtil
{
    /// <summary>
    ///     默认发布者
    /// </summary>
    private const string JwtKey = "这你放的是你的秘钥，必须要256位以上，否则会报错";

    /// <summary>
    ///     默认发布者
    /// </summary>
    private const string Issuer = "Bunny-Issuer";

    /// <summary>
    ///     默认接受者
    /// </summary>
    private const string Audience = "Bunny-Audience";

    /// <summary>
    ///     默认有效时间，按天计算
    /// </summary>
    private const int Day = 7;

    /// <summary>
    ///     判断是否过期
    /// </summary>
    /// <param name="jwtToken">token</param>
    /// <returns>过期：true，未过期：false</returns>
    public static bool IsJwtExpired(string? jwtToken)
    {
        var tokenHandler = new JwtSecurityTokenHandler();

        // Token无效直接返回过期
        if (tokenHandler.ReadToken(jwtToken) is not JwtSecurityToken jwtTokenObj) return true;

        // 判断是否过期
        return DateTime.UtcNow > jwtTokenObj.ValidTo;
    }

    /// <summary>
    ///     生成 SigningCredentials
    /// </summary>
    private static SigningCredentials Credentials(string jwtKey)
    {
        var symmetricSecurityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtKey));
        return new SigningCredentials(symmetricSecurityKey, SecurityAlgorithms.HmacSha256Signature);
    }


    /// <summary>
    ///     将字典转为实体类
    /// </summary>
    /// <param name="dictionary">字典</param>
    /// <returns>所对应的实体类</returns>
    // public static T? ConvertDictionaryToObject(Dictionary<string, object> dictionary)
    // {
    //     var json = JsonConvert.SerializeObject(dictionary);
    //     // 将JSON转为对象
    //     return JsonConvert.DeserializeObject<T>(json);
    // }
    public static T? ConvertDictionaryToObject<T>(Dictionary<string, object> dictionary)
    {
        var json = JsonConvert.SerializeObject(dictionary);
        // 将JSON转为对象
        return JsonConvert.DeserializeObject<T>(json);
    }

    /// <summary>
    ///     将对象转为Claim
    /// </summary>
    /// <param name="object">要转换的对象</param>
    /// <returns>Claim</returns>
    public static IEnumerable<Claim> CreateClaim<T>(T @object)
    {
        // 将对象序列化成JSON
        var json = JsonConvert.SerializeObject(@object);

        // 将JSON复制给Claim
        return ParseJsonToClaimEnumerable(json);
    }
}