package com.yuanchu.tms.config;

import com.yuanchu.tms.utils.JackSonUtil;
import com.yuanchu.tms.utils.Jwt;
import com.yuanchu.tms.utils.RedisUtil;
import com.yuanchu.tms.vo.Result;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicBoolean;

@Component
public class FiferConfig implements HandlerInterceptor {

    @Value("${server.port}")
    private String serverPort;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if (HttpMethod.OPTIONS.toString().equals(request.getMethod())) {
            response.setStatus(HttpServletResponse.SC_OK);
            return true;
        }
        String[] strs = request.getRequestURL().toString().split(serverPort);
        AtomicBoolean judge = new AtomicBoolean(false);
        list.forEach(a -> {
            if (strs[1].equals(a)) {
                judge.set(true);
                return;
            } else if (a.indexOf("/**") > -1) {
                if (strs[1].indexOf(a.replace("/**", "")) == 0) {
                    judge.set(true);
                    return;
                }
            }
        });
        if (judge.get()) return true;
        response.setContentType(MediaType.APPLICATION_JSON_VALUE);
        response.setCharacterEncoding("UTF-8");
        String token = request.getHeader("token");
        Map<String, String> map = new Jwt().readJWT(token);
        if (map.get("state").equals("0")) {
            String redisToken = String.valueOf(RedisUtil.get(JackSonUtil.unmarshal(map.get("data"), Map.class).get("id").toString()));
            if (!redisToken.equals(token)) {
                map.put("info", "不存在的token");
                map.put("state", "2");
            } else {
                return true;
            }
        }
        PrintWriter out = response.getWriter();
        out.print(new Result<>().fail(401,map.get("info")));
        switch (map.get("state")){
            case "1":
                response.setStatus(401);
                break;
            case "2":
                response.setStatus(402);
                break;
        }
        return false;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
//        System.out.println("-------------------------拦截器校验通过---------------------------");
    }

    private List<String> list;

    private FiferConfig() {
        List<String> list = new ArrayList<>();
        list.add("/error");

        list.add("/user/enter");
        list.add("/user/refresh");
        this.list = list;
    }

}