package com.aigeo.common.security;

import com.aigeo.common.result.Result;
import com.fasterxml.jackson.databind.ObjectMapper;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.MediaType;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

/**
 * JWT认证入口点 - 处理认证异常
 *
 * @author AIGEO Team
 * @since 1.0.0
 */
@Slf4j
@Component
public class JwtAuthenticationEntryPoint implements AuthenticationEntryPoint {

    private final ObjectMapper objectMapper = new ObjectMapper();

    @Override
    public void commence(HttpServletRequest request, HttpServletResponse response,
                        AuthenticationException authException) throws IOException, ServletException {
        
        log.error("认证失败: {}", authException.getMessage());
        
        response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        response.setContentType(MediaType.APPLICATION_JSON_VALUE);
        response.setCharacterEncoding(StandardCharsets.UTF_8.name());
        
        Result<Void> result = Result.unauthorized("认证失败，请先登录");
        
        response.getWriter().write(objectMapper.writeValueAsString(result));
    }
}