package com.trafficaudit.system.service;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.trafficaudit.security.utils.JwtUtils;
import com.trafficaudit.system.entity.OperationLog;
import com.trafficaudit.system.entity.User;
import com.trafficaudit.system.mapper.OperationLogMapper;
import com.trafficaudit.system.mapper.UserMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

/**
 * 操作日志服务：记录关键操作（报表生成/系列打包等），自动从 Authorization 头解析当前用户。
 * 解析失败或未登录时不抛异常，仅记录操作本身。
 */
@Slf4j
@Service
public class OperationLogService {

    @Resource
    private OperationLogMapper operationLogMapper;
    @Resource
    private UserMapper userMapper;
    @Resource
    private JwtUtils jwtUtils;
    @Resource
    private HttpServletRequest request;

    public void record(String module, String action, String detail) {
        try {
            OperationLog entry = new OperationLog();
            entry.setModule(module);
            entry.setAction(action);
            entry.setDetail(detail);
            entry.setUserId(resolveUserId());
            entry.setIpAddress(clientIp());
            operationLogMapper.insert(entry);
        } catch (Exception e) {
            log.warn("操作日志记录失败: {}", e.getMessage());
        }
    }

    private Long resolveUserId() {
        try {
            String auth = request.getHeader("Authorization");
            if (auth == null || !auth.startsWith("Bearer ")) {
                return null;
            }
            String username = jwtUtils.getUsernameFromToken(auth.substring(7));
            if (username == null || username.isEmpty()) {
                return null;
            }
            User user = userMapper.selectOne(new LambdaQueryWrapper<User>()
                .eq(User::getUsername, username).last("limit 1"));
            return user == null ? null : user.getId();
        } catch (Exception e) {
            return null;
        }
    }

    private String clientIp() {
        try {
            String ip = request.getHeader("X-Forwarded-For");
            if (ip != null && !ip.isEmpty()) {
                return ip.split(",")[0].trim();
            }
            return request.getRemoteAddr();
        } catch (Exception e) {
            return "";
        }
    }
}