using System.IdentityModel.Tokens.Jwt;
using System.Text;
using Microsoft.IdentityModel.Tokens;

namespace Application.Service.Pub;

public class JwtTool
{
    public static async Task<TokenValidationResult> ParseWithValidationAsync(
        string jwtToken, 
        TokenValidationParameters validationParameters)
    {
        if (string.IsNullOrWhiteSpace(jwtToken))
            throw new ArgumentNullException(nameof(jwtToken));
        if (validationParameters == null)
            throw new ArgumentNullException(nameof(validationParameters));

        var handler = new JwtSecurityTokenHandler();
        
        // 异步验证并解析
        return await handler.ValidateTokenAsync(jwtToken, validationParameters);
    }
    
    public static async Task<JwtSecurityToken?> ParseWithSecretKeyAsync(string jwtToken, string secretKey)
    {
        var validationParams = new TokenValidationParameters
        {
            // 必须配置：密钥
            IssuerSigningKey = (SecurityKey) new SymmetricSecurityKey(Encoding.ASCII.GetBytes(secretKey)),
            // 验证签名（必须开启）
            ValidateIssuerSigningKey = true,

            // 根据你的 JWT 配置开启/关闭
            ValidateIssuer = false,      // 是否验证签发者
            ValidateAudience = false,    // 是否验证受众
            ValidateLifetime = false      // 是否验证过期时间（默认开启）
        };

        var result = await ParseWithValidationAsync(jwtToken, validationParams);
        
        return result.IsValid ? result.SecurityToken as JwtSecurityToken : null;
    }

    public static async Task< object> GetJwtData(string jwtToken, string secretKey,string key)
    {
        var token = await ParseWithSecretKeyAsync(jwtToken,secretKey);
        var data = token.Payload;
        if (data.TryGetValue(key, out object result))
        {
            return result;
        }

        return null;
    }
}