package org.wfc.common.security.feign;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.stereotype.Component;
import org.wfc.common.core.constant.SecurityConstants;
import org.wfc.common.core.utils.ServletUtils;
import org.wfc.common.core.utils.StringUtils;
import org.wfc.common.core.utils.ip.IpUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.Collection;
import java.util.Map;

/**
 * feign 请求拦截器
 *
 * @author wfc
 */
@Component
public class FeignRequestInterceptor implements RequestInterceptor {
    @Override
    public void apply(RequestTemplate requestTemplate) {
        HttpServletRequest httpServletRequest = ServletUtils.getRequest();
        if (StringUtils.isNotNull(httpServletRequest)) {
            Map<String, String> headers = ServletUtils.getHeaders(httpServletRequest);
            // 传递用户信息请求头，防止丢失
            String userId = headers.get(SecurityConstants.DETAILS_USER_ID);
            if (StringUtils.isNotEmpty(userId)) {
                requestTemplate.header(SecurityConstants.DETAILS_USER_ID, userId);
            }
            String userKey = headers.get(SecurityConstants.USER_KEY);
            if (StringUtils.isNotEmpty(userKey)) {
                requestTemplate.header(SecurityConstants.USER_KEY, userKey);
            }
            String userName = headers.get(SecurityConstants.DETAILS_USERNAME);
            if (StringUtils.isNotEmpty(userName)) {
                requestTemplate.header(SecurityConstants.DETAILS_USERNAME, userName);
            }
            String authentication = headers.get(SecurityConstants.AUTHORIZATION_HEADER);
            if (StringUtils.isNotEmpty(authentication)) {
                Collection<String> headerValues = requestTemplate.headers().get(SecurityConstants.AUTHORIZATION_HEADER);
                boolean hasToken = headerValues != null && headerValues.stream().anyMatch(c -> c.startsWith(SecurityConstants.PRE_ACCESS_TOKEN));
                if (!hasToken) {
                    requestTemplate.header(SecurityConstants.AUTHORIZATION_HEADER, authentication);
                }

            }
            String language = headers.get(SecurityConstants.CONTENT_LANGUAGE);
            if (StringUtils.isNotEmpty(language)) {
                requestTemplate.header(SecurityConstants.CONTENT_LANGUAGE, language);
            }
            String platform = headers.get(SecurityConstants.DETAILS_PLATFORM);
            if (StringUtils.isNotEmpty(platform)) {
                requestTemplate.header(SecurityConstants.DETAILS_PLATFORM, platform);
            }

            // 配置客户端IP
            requestTemplate.header("X-Forwarded-For", IpUtils.getIpAddr());
        }
    }
}