package com.zy.common.config;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.core.annotations.ManagerAuth;
import com.core.common.BaseRes;
import com.core.common.Cools;
import com.zy.common.utils.Http;
import com.zy.system.entity.*;
import com.zy.system.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.lang.Nullable;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;

/**
 * Created by vincent on 2019-06-13
 */
@Component
@Slf4j
public class AdminInterceptor implements HandlerInterceptor {

    private static final String ATTR_USER_ID = "userId";
    private static final String ATTR_OPERATE_LOG = "operateLog";
    private static final Long SUPER_USER_ID = 9527L;

    @Value("${super.pwd}")
    private String superPwd;
    @Autowired
    private UserService userService;
    @Autowired
    private UserLoginService userLoginService;
    @Autowired
    private OperateLogService operateLogService;
    @Autowired
    private PermissionService permissionService;
    @Autowired
    private RolePermissionService rolePermissionService;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        cors(response);
        if (handler instanceof org.springframework.web.servlet.resource.ResourceHttpRequestHandler) {
            return true;
        }
        ManagerAuth annotation = resolveManagerAuth(handler);
        boolean requiresCheck = annotation != null && annotation.value().equals(ManagerAuth.Auth.CHECK);
        // super账号
        String token = request.getHeader("token");
        if (token!=null) {
            String deToken = Cools.deTokn(token, superPwd);
            if (deToken!=null){
                long timestamp = Long.parseLong(deToken.substring(0, 13));
                // 1天后过期
                if (System.currentTimeMillis() - timestamp > 86400000){
                    Http.response(response, BaseRes.DENIED);
                    return false;
                }
                if ("super".equals(deToken.substring(13))) {
                    request.setAttribute(ATTR_USER_ID, SUPER_USER_ID);
                    if (requiresCheck) {
                        cacheOperateLog(request, annotation.memo(), SUPER_USER_ID);
                    }
                    return true;
                }
            }
        }
        // 跨域设置
        // response.setHeader("Access-Control-Allow-Origin", "*");
        if (!(handler instanceof HandlerMethod)) {
            return true;
        }
        if (requiresCheck){
            return check(request, response, annotation.memo());
        }
        return true;
    }

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

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
                                @Nullable Exception ex) {
        Object obj = request.getAttribute(ATTR_OPERATE_LOG);
        if (!(obj instanceof OperateLog)) {
            return;
        }
        OperateLog operateLog = (OperateLog) obj;
        operateLog.setResponse(buildResponseContent(response, ex));
        try {
            operateLogService.save(operateLog);
        } catch (Exception saveEx) {
            log.warn("保存操作日志失败, uri={}", request.getRequestURI(), saveEx);
        }
    }

    private boolean check(HttpServletRequest request, HttpServletResponse response, String memo) {
        try {
            String token = request.getHeader("token");
            UserLogin userLogin = userLoginService.getOne(new QueryWrapper<UserLogin>().eq("token", token).eq("system_type", "WCS"));
            if (null == userLogin){
                Http.response(response, BaseRes.DENIED);
                return false;
            }
            User user = userService.getById(userLogin.getUserId());
            String deToken = Cools.deTokn(token, user.getPassword());
            long timestamp = Long.parseLong(deToken.substring(0, 13));
            // 1天后过期
            if (System.currentTimeMillis() - timestamp > 86400000){
                Http.response(response, BaseRes.DENIED);
                return false;
            }
            // 权限校验
            if (!limit(request.getRequestURI(), user)) {
                Http.response(response, BaseRes.LIMIT);
                return false;
            }
            // 请求缓存
            request.setAttribute(ATTR_USER_ID, user.getId());
            cacheOperateLog(request, memo, user.getId());
            return true;
        } catch (Exception e){
            Http.response(response, BaseRes.DENIED);
            return false;
        }

    }

    /**
     * 权限拦截
     * @return false:无权限;   true:认证通过
     */
    private boolean limit(String action, User user) {
        Permission permission = new Permission();
        permission.setAction(action);
        permission.setStatus((short) 1);
        Permission one = permissionService.getOne(new QueryWrapper<>(permission));
        if (!Cools.isEmpty(one)) {
            RolePermission rolePermission = rolePermissionService.getOne(new QueryWrapper<>(new RolePermission(user.getRoleId(), permission.getId())));
            return !Cools.isEmpty(rolePermission);
        }
        return true;
    }

    /**
     * 跨域
     */
    private void cors(HttpServletResponse response){
        // 跨域设置
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Methods", "*");
        response.setHeader("Access-Control-Allow-Headers", "Content-Type,Access-Token,token,X-Lang,Accept-Language");
        response.setHeader("Access-Control-Expose-Headers", "*");

    }

    private ManagerAuth resolveManagerAuth(Object handler) {
        if (!(handler instanceof HandlerMethod)) {
            return null;
        }
        HandlerMethod handlerMethod = (HandlerMethod) handler;
        Method method = handlerMethod.getMethod();
        if (!method.isAnnotationPresent(ManagerAuth.class)) {
            return null;
        }
        return method.getAnnotation(ManagerAuth.class);
    }

    private void cacheOperateLog(HttpServletRequest request, String memo, Long userId) {
        if (userId == null || request.getAttribute(ATTR_OPERATE_LOG) != null) {
            return;
        }
        OperateLog operateLog = new OperateLog();
        operateLog.setAction(Cools.isEmpty(memo) ? request.getRequestURI() : memo);
        operateLog.setIp(request.getRemoteAddr());
        operateLog.setUserId(userId);
        operateLog.setRequest(JSON.toJSONString(request.getParameterMap()));
        operateLog.setCreateTime(new Date());
        request.setAttribute(ATTR_OPERATE_LOG, operateLog);
    }

    private String buildResponseContent(HttpServletResponse response, Exception ex) {
        Map<String, Object> result = new LinkedHashMap<>();
        result.put("status", response.getStatus());
        if (ex != null) {
            result.put("error", ex.getClass().getName());
            result.put("message", ex.getMessage());
        }
        return JSON.toJSONString(result);
    }

}