package art.kexue.sxwz.aspect;

import art.kexue.sxwz.exception.BizException;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.redisson.api.RedissonClient;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.util.Collections;
import java.util.List;

@Aspect
@Component
@Slf4j
public class EduPermissionAspect {

    @Resource
    private RedissonClient redissonClient;

    @Around("execution(* art.kexue.sxwz.service.impl.Edu*ServiceImpl.*(..))")
    public Object checkEduPermission(ProceedingJoinPoint joinPoint) throws Throwable {
        try {
            cn.dev33.satoken.stp.StpUtil.checkLogin();

            Long userId = cn.dev33.satoken.stp.StpUtil.getLoginIdAsLong();
            String token = cn.dev33.satoken.stp.StpUtil.getTokenValue();

            // SUPER角色拥有所有权限，直接放行
            if (cn.dev33.satoken.stp.StpUtil.hasRole("SUPER")) {
                log.info("用户ID: {} 拥有SUPER角色，直接放行，访问方法: {}", userId, joinPoint.getSignature().getName());
                return joinPoint.proceed();
            }

            List<String> permissions = getUserPermissions(token);

            String requiredPermission = generatePermissionCode(joinPoint);

            log.info("用户ID: {}, 访问方法: {}, 需要权限: {}", 
                    userId, 
                    joinPoint.getSignature().getName(), 
                    requiredPermission);

            if (permissions == null || permissions.isEmpty()) {
                log.warn("用户未配置任何权限");
                throw new BizException(403, "没有相应操作权限");
            }

            if (!permissions.contains(requiredPermission)) {
                log.warn("用户缺少权限: {}", requiredPermission);
                throw new BizException(403, "没有相应操作权限");
            }

            log.info("权限验证通过: {}", requiredPermission);

        } catch (cn.dev33.satoken.exception.NotLoginException e) {
            log.error("未登录：{}", e.getMessage());
            throw new BizException(401, "请先登录认证后操作");
        } catch (BizException e) {
            throw e;
        } catch (Exception e) {
            log.error("权限验证失败：{}", e.getMessage());
            throw new BizException(403, "权限验证失败");
        }

        return joinPoint.proceed();
    }

    private List<String> getUserPermissions(String token) {
        try {
            String loginUserJson = (String) redissonClient.getBucket("loginUser:" + token).get();
            if (loginUserJson != null && !loginUserJson.isEmpty()) {
                cn.hutool.json.JSONObject jsonObject = cn.hutool.json.JSONUtil.parseObj(loginUserJson);
                cn.hutool.json.JSONArray permissionsArray = jsonObject.getJSONArray("permissions");
                if (permissionsArray != null) {
                    return permissionsArray.toList(String.class);
                }
            }
        } catch (Exception e) {
            log.error("从Redis获取用户权限失败：{}", e.getMessage());
        }
        return Collections.emptyList();
    }

    private String generatePermissionCode(ProceedingJoinPoint joinPoint) {
        String className = joinPoint.getTarget().getClass().getSimpleName();
        String methodName = joinPoint.getSignature().getName();

        String module = extractModule(className);
        String action = extractAction(methodName);

        return String.format("%s:%s", module, action);
    }

    private String extractModule(String className) {
        if (className.startsWith("EduCourse")) {
            return "course";
        } else if (className.startsWith("EduStudent")) {
            return "user:student";
        } else if (className.startsWith("EduTeacher")) {
            return "user:teacher";
        } else if (className.startsWith("EduHomework")) {
            return "homework";
        } else if (className.startsWith("EduExam")) {
            return "exam";
        } else if (className.startsWith("EduAttendance")) {
            return "attendance";
        } else if (className.startsWith("EduExcellentWork")) {
            return "excellent";
        }else if (className.startsWith("EduSchool")) {
            return "school";
        } else {
            return className.replace("Edu", "").replace("ServiceImpl", "").toLowerCase();
        }
    }

    private String extractAction(String methodName) {
        if (methodName.startsWith("save") || methodName.startsWith("create")) {
            return "add";
        } else if (methodName.startsWith("update") && !methodName.startsWith("updateStatus")) {
            return "update";  // 修改：update方法返回update而非edit
        } else if (methodName.startsWith("updateStatus")) {
            return "updateStatus";  // 新增：状态变更方法
        } else if (methodName.startsWith("edit")) {
            return "edit";
        } else if (methodName.startsWith("delete") || methodName.startsWith("remove")) {
            return "delete";
        } else if (methodName.equals("pageList")) {
            return "pageList";  // 新增：分页查询方法
        } else if (methodName.startsWith("query") || methodName.startsWith("get") || methodName.startsWith("list")) {
            return "query";
        } else if (methodName.startsWith("addStudent")) {
            return "student:add";
        } else if (methodName.startsWith("removeStudent")) {
            return "student:remove";
        } else if (methodName.startsWith("submit")) {
            return "submit";
        } else if (methodName.startsWith("grade")) {
            return "grade";
        } else if (methodName.startsWith("publish")) {
            return "publish";
        } else if (methodName.startsWith("mark")) {
            return "mark";
        } else if (methodName.startsWith("addLike")) {
            return "like";
        } else if (methodName.startsWith("removeLike")) {
            return "like:remove";
        } else if (methodName.startsWith("countLikes")) {
            return "like:count";
        } else if (methodName.startsWith("recordAttendance")) {
            return "record";
        } else if (methodName.startsWith("batchCreate")) {
            return "batch:add";
        } else if (methodName.startsWith("isStudentIn")) {
            return "student:exists";
        } else if (methodName.startsWith("sendNotification")) {
            return "notification:send";
        } else if (methodName.startsWith("markAsRead")) {
            return "notification:read";
        } else if (methodName.startsWith("createMakeup")) {
            return "makeup";
        } else {
            return methodName.toLowerCase();
        }
    }
}