package com.doumee.core.Jwt;

import com.doumee.core.annotation.LoginRequired;
import com.doumee.core.constants.Constants;
import com.doumee.core.constants.ResponseStatus;
import com.doumee.core.exception.BusinessException;
import io.jsonwebtoken.JwtException;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {


    @Autowired
    private JdbcTemplate dao;

    /**
     * 添加拦截器
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //API接口JwtToken拦截器
        HandlerInterceptor TokenInterceptor = new HandlerInterceptor() {
            @Override
            public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
                // 如果不是映射到方法直接通过
                if (!(handler instanceof HandlerMethod)) {
                    return true;
                }
                HandlerMethod handlerMethod = (HandlerMethod) handler;

                Class<?> beanType = handlerMethod.getBeanType();

//                Method method = handlerMethod.getMethod();

                // 有 @LoginRequired 注解，需要登录认证
                if (beanType.isAnnotationPresent(LoginRequired.class)) {
                    //获取token
                    String token = request.getHeader(JwtTokenUtil.HEADER_KEY);  // 从 http 请求头中取出 token
                    if (StringUtils.isNotBlank(token)) {
                        checkLogin(request,response);
                    } else {
                        throw new BusinessException(ResponseStatus.BE_OVERDUE.getCode(),"未登录");
                    }
                }else if (handlerMethod.hasMethodAnnotation(LoginRequired.class)){
                    //获取token
                    String token = request.getHeader(JwtTokenUtil.HEADER_KEY);  // 从 http 请求头中取出 token
                    if (StringUtils.isNotBlank(token)) {
                        checkLogin(request,response);
                    } else {
                        throw new BusinessException(ResponseStatus.BE_OVERDUE.getCode(),"未登录");
                    }
                }
                return true;
            }
        };
        registry.addInterceptor(TokenInterceptor).addPathPatterns("/web/**");
    }



    public Boolean checkLogin(HttpServletRequest request, HttpServletResponse response){
        String token = request.getHeader(JwtTokenUtil.HEADER_KEY);
        try {
            //判断Token是否超时
            boolean expiration = JwtTokenUtil.isTokenExpired(token);
            if (expiration) {
                throw new BusinessException(ResponseStatus.TOKEN_EXCEED_TIME.getCode(),"长时间未操作,请重新登录");
            }
            //获取账号ID
            String memberId = JwtTokenUtil.getJwtPayLoad(token).getMemberId();
            Integer isDeleted = dao.queryForObject(" select COALESCE(isdeleted,1)  from member where id  = ?", Integer.class, memberId);
            if(isDeleted.equals(Constants.ONE)){
                throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(),"用户已删除,请联系管理员");
            }
            Integer isForbidden = dao.queryForObject(" select COALESCE(STATUS,1)  from member where id  = ?", Integer.class, memberId);
            if(isForbidden.equals(Constants.ONE)){
                throw new BusinessException(ResponseStatus.NOT_ALLOWED.getCode(),"用户已禁用,请联系管理员");
            }
            Integer count = dao.queryForObject("select count(1) from member where id  = ?", Integer.class, memberId);
            if (count != null && count > 0) {
                request.setAttribute(JwtTokenUtil.UserId_Name, memberId);
                return true;
            }else{
                throw new BusinessException(ResponseStatus.BE_OVERDUE.getCode(),"用户信息出错");
            }
        } catch (IllegalArgumentException | JwtException e) {
            throw new BusinessException(ResponseStatus.BE_OVERDUE.getCode(),"未登录");
        }
    }

    @Bean
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }


}