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

namespace TestJwtValidation
{
    class Program
    {
        static void Main(string[] args)
        {
            var token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJuYW1laWQiOiIyMSIsInVuaXF1ZV9uYW1lIjoic3RyaW5nIiwiZW1haWwiOiJ1c2VyQGV4YW1wbGUuY29tIiwibmJmIjoxNzYwNTk3MTA5LCJleHAiOjE3NjA2MDA3MDksImlhdCI6MTc2MDU5NzEwOSwiaXNzIjoiRnV0dXJlTWFpbEFQSSIsImF1ZCI6IkZ1dHVyZU1haWxDbGllbnQifQ.u-flaJioXuZfU_b-hD8_x5-gH0e9t_AkScQKOKIsAqE";
            
            try
            {
                var tokenHandler = new JwtSecurityTokenHandler();
                var jwtSettings = new
                {
                    Key = "ThisIsASecretKeyForJWTTokenGenerationAndValidation123456789",
                    Issuer = "FutureMailAPI",
                    Audience = "FutureMailClient"
                };
                
                var key = Encoding.ASCII.GetBytes(jwtSettings.Key);
                
                var validationParameters = new TokenValidationParameters
                {
                    ValidateIssuerSigningKey = true,
                    IssuerSigningKey = new SymmetricSecurityKey(key),
                    ValidateIssuer = true,
                    ValidIssuer = jwtSettings.Issuer,
                    ValidateAudience = true,
                    ValidAudience = jwtSettings.Audience,
                    ValidateLifetime = true,
                    ClockSkew = TimeSpan.Zero
                };

                // 验证JWT令牌
                var principal = tokenHandler.ValidateToken(token, validationParameters, out SecurityToken validatedToken);
                
                Console.WriteLine("令牌验证成功!");
                Console.WriteLine($"令牌类型: {validatedToken.GetType().Name}");
                
                // 检查所有Claims
                Console.WriteLine("\n所有Claims:");
                foreach (var claim in principal.Claims)
                {
                    Console.WriteLine($"类型: {claim.Type}, 值: {claim.Value}");
                }
                
                // 检查特定Claim
                var nameIdClaim = principal.FindFirst(System.Security.Claims.ClaimTypes.NameIdentifier);
                Console.WriteLine($"\nNameIdentifier Claim: {nameIdClaim?.Value ?? "未找到"}");
                
                var userId = 0;
                if (nameIdClaim != null && int.TryParse(nameIdClaim.Value, out userId))
                {
                    Console.WriteLine($"解析的用户ID: {userId}");
                }
            }
            catch (SecurityTokenExpiredException)
            {
                Console.WriteLine("令牌已过期");
            }
            catch (SecurityTokenInvalidSignatureException)
            {
                Console.WriteLine("令牌签名无效");
            }
            catch (SecurityTokenException ex)
            {
                Console.WriteLine($"令牌验证失败: {ex.Message}");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"发生错误: {ex.Message}");
            }
        }
    }
}