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/*
 * Copyright 2018-2025 guerlab.net and other contributors.
 *
 * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE, Version 3 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.gnu.org/licenses/lgpl-3.0.html
 *
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.guerlab.cloud.web.webmvc.support;

import jakarta.annotation.Nullable;
import lombok.extern.slf4j.Slf4j;

import org.springframework.core.MethodParameter;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;

import net.guerlab.cloud.commons.ip.IpUtils;
import net.guerlab.cloud.web.core.annotation.RequestIp;

/**
 * 请求IP参数处理.
 *
 * @author guer
 */
@Slf4j
public class WebMvcRequestIpHandlerMethodArgumentResolver implements HandlerMethodArgumentResolver {

	@Override
	public boolean supportsParameter(MethodParameter parameter) {
		return parameter.getParameterAnnotation(RequestIp.class) != null;
	}

	@Nullable
	@Override
	public Object resolveArgument(MethodParameter parameter, @Nullable ModelAndViewContainer mavContainer,
			NativeWebRequest webRequest, @Nullable WebDataBinderFactory binderFactory) {
		Object nativeRequest = webRequest.getNativeRequest();
		log.debug("nativeRequest: {}", nativeRequest);
		String ip = IpUtils.getIp(nativeRequest);
		log.debug("get ip in nativeRequest: {}", ip);
		return ip;
	}
}