package com.ard.sample.component;

import com.ard.common.core.domain.model.LoginUser;
import com.ard.common.enums.HttpMethod;
import com.ard.framework.web.service.TokenService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Slf4j
@Component
public class AuthInterceptor implements HandlerInterceptor {

    public static final String PARAM_TOKEN = "Authorization";
    public static final String TOKEN_CLAIM = "loginUser";
    @Autowired
    private TokenService tokenService;

    public AuthInterceptor(TokenService tokenService) {
        this.tokenService = tokenService;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String uri = request.getRequestURI();
        log.debug("request uri: {}", uri);

        // 预检请求直接放行
        if (HttpMethod.OPTIONS.matches(request.getMethod())) {
            response.setStatus(HttpStatus.OK.value());
            return false;
        }

        // 取 token（这里用 header，你也可以支持 query 参数）
        String token = request.getHeader(PARAM_TOKEN);
        if (!StringUtils.hasText(token)) {
            response.setStatus(HttpStatus.UNAUTHORIZED.value());
            log.error("No token provided.");
            return false;
        }

        // 使用若依的 TokenService 解析用户
        LoginUser loginUser = tokenService.getLoginUser(request);
        if (loginUser == null) {
            response.setStatus(HttpStatus.UNAUTHORIZED.value());
            log.error("Invalid token.");
            return false;
        }

        // 校验 token 过期时间，快过期自动刷新
        tokenService.verifyToken(loginUser);

        // 保存到 request，方便后面用
        request.setAttribute(TOKEN_CLAIM, loginUser);
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
                           ModelAndView modelAndView) {
        request.removeAttribute(TOKEN_CLAIM);
    }
}