package com.zsElectric.boot.charging.aspect;

import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.zsElectric.boot.charging.entity.ThirdPartyApiLog;
import com.zsElectric.boot.charging.service.ThirdPartyApiLogService;
import jakarta.servlet.http.HttpServletRequest;
import lombok.RequiredArgsConstructor;
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.annotation.Pointcut;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import java.time.LocalDateTime;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

/**
 * 第三方接口日志记录切面
 * 拦截 LinkDataController 和 ChargingBusinessController 的所有方法,自动记录请求和响应日志
 *
 * @author system
 * @since 2025-01-02
 */
@Slf4j
@Aspect
@Component
@RequiredArgsConstructor
public class ThirdPartyApiLogAspect {

    private final ThirdPartyApiLogService thirdPartyApiLogService;
    private final ObjectMapper objectMapper;

    /**
     * 定义切入点: LinkDataController 的所有方法
     */
    @Pointcut("execution(* com.zsElectric.boot.charging.controller.LinkDataController.*(..))")
    public void linkDataControllerPointcut() {
    }

    /**
     * 定义切入点: ChargingBusinessController 的所有方法
     */
    @Pointcut("execution(* com.zsElectric.boot.charging.controller.ChargingBusinessController.*(..))")
    public void chargingBusinessControllerPointcut() {
    }

    /**
     * 环绕通知: 记录 LinkDataController 接口日志
     */
    @Around("linkDataControllerPointcut()")
    public Object aroundLinkDataController(ProceedingJoinPoint joinPoint) throws Throwable {
        return recordApiLog(joinPoint, "LinkDataController", 2); // 2-接收推送
    }

    /**
     * 环绕通知: 记录 ChargingBusinessController 接口日志
     */
    @Around("chargingBusinessControllerPointcut()")
    public Object aroundChargingBusinessController(ProceedingJoinPoint joinPoint) throws Throwable {
        return recordApiLog(joinPoint, "ChargingBusinessController", 1); // 1-请求出去
    }

    /**
     * 记录接口日志的通用方法
     */
    private Object recordApiLog(ProceedingJoinPoint joinPoint, String controllerName, Integer logType) throws Throwable {
        long startTime = System.currentTimeMillis();
        ThirdPartyApiLog apiLog = new ThirdPartyApiLog();
        
        // 获取 HttpServletRequest
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes != null ? attributes.getRequest() : null;
        
        try {
            // 设置基本信息
            apiLog.setLogType(logType);
            apiLog.setControllerName(controllerName);
            LocalDateTime now = LocalDateTime.now();
            apiLog.setCreatedTime(now);
            apiLog.setUpdatedTime(now);
            
            if (request != null) {
                // 请求信息
                apiLog.setRequestMethod(request.getMethod());
                apiLog.setRequestUrl(request.getRequestURL().toString());
                apiLog.setInterfaceName(request.getRequestURI());
                apiLog.setClientIp(getClientIp(request));
                apiLog.setUserAgent(request.getHeader("User-Agent"));
                
                // 请求头
                apiLog.setRequestHeaders(getRequestHeaders(request));
                
                // 请求参数
                Map<String, String[]> parameterMap = request.getParameterMap();
                if (!parameterMap.isEmpty()) {
                    apiLog.setRequestParams(objectMapper.writeValueAsString(parameterMap));
                }
                
                // 请求体(从切点参数中获取)
                Object[] args = joinPoint.getArgs();
                if (args != null && args.length > 0) {
                    for (Object arg : args) {
                        if (arg != null && !(arg instanceof HttpServletRequest) && !(arg instanceof jakarta.servlet.http.HttpServletResponse)) {
                            apiLog.setRequestBody(objectMapper.writeValueAsString(arg));
                            
                            // 尝试提取业务字段
                            extractBusinessFields(arg, apiLog);
                            break;
                        }
                    }
                }
            }
            
            // 执行目标方法
            Object result = joinPoint.proceed();
            
            // 记录响应
            long endTime = System.currentTimeMillis();
            apiLog.setResponseTime(endTime - startTime);
            apiLog.setResponseStatus(200);
            apiLog.setIsSuccess(1);
            
            if (result != null) {
                apiLog.setResponseBody(objectMapper.writeValueAsString(result));
            }
            
            // 异步保存日志
            thirdPartyApiLogService.saveLogAsync(apiLog);
            
            return result;
            
        } catch (Exception e) {
            // 记录异常
            long endTime = System.currentTimeMillis();
            apiLog.setResponseTime(endTime - startTime);
            apiLog.setResponseStatus(500);
            apiLog.setIsSuccess(0);
            apiLog.setErrorMessage(e.getMessage());
            
            // 异步保存日志
            thirdPartyApiLogService.saveLogAsync(apiLog);
            
            throw e;
        }
    }

    /**
     * 提取业务字段
     */
    private void extractBusinessFields(Object requestBody, ThirdPartyApiLog apiLog) {
        try {
            String json = objectMapper.writeValueAsString(requestBody);
            Map<String, Object> map = objectMapper.readValue(json, Map.class);
            
            // 提取运营商ID
            if (map.containsKey("OperatorID")) {
                apiLog.setOperatorId(String.valueOf(map.get("OperatorID")));
            } else if (map.containsKey("operatorID")) {
                apiLog.setOperatorId(String.valueOf(map.get("operatorID")));
            }
            
            // 提取充电站ID
            if (map.containsKey("StationID")) {
                apiLog.setStationId(String.valueOf(map.get("StationID")));
            } else if (map.containsKey("stationID")) {
                apiLog.setStationId(String.valueOf(map.get("stationID")));
            }
            
            // 提取充电桩ID
            if (map.containsKey("ConnectorID")) {
                apiLog.setConnectorId(String.valueOf(map.get("ConnectorID")));
            } else if (map.containsKey("connectorID")) {
                apiLog.setConnectorId(String.valueOf(map.get("connectorID")));
            }
            
            // 提取业务流水号
            if (map.containsKey("StartChargeSeq")) {
                apiLog.setBusinessSeq(String.valueOf(map.get("StartChargeSeq")));
            } else if (map.containsKey("startChargeSeq")) {
                apiLog.setBusinessSeq(String.valueOf(map.get("startChargeSeq")));
            } else if (map.containsKey("EquipAuthSeq")) {
                apiLog.setBusinessSeq(String.valueOf(map.get("EquipAuthSeq")));
            } else if (map.containsKey("equipAuthSeq")) {
                apiLog.setBusinessSeq(String.valueOf(map.get("equipAuthSeq")));
            } else if (map.containsKey("EquipBizSeq")) {
                apiLog.setBusinessSeq(String.valueOf(map.get("EquipBizSeq")));
            } else if (map.containsKey("equipBizSeq")) {
                apiLog.setBusinessSeq(String.valueOf(map.get("equipBizSeq")));
            }
            
        } catch (Exception e) {
            log.debug("提取业务字段失败: {}", e.getMessage());
        }
    }

    /**
     * 获取请求头信息
     */
    private String getRequestHeaders(HttpServletRequest request) {
        try {
            Map<String, String> headers = new HashMap<>();
            Enumeration<String> headerNames = request.getHeaderNames();
            while (headerNames.hasMoreElements()) {
                String headerName = headerNames.nextElement();
                headers.put(headerName, request.getHeader(headerName));
            }
            return objectMapper.writeValueAsString(headers);
        } catch (Exception e) {
            log.error("获取请求头失败: {}", e.getMessage());
            return null;
        }
    }

    /**
     * 获取客户端真实IP
     */
    private String getClientIp(HttpServletRequest request) {
        String ip = request.getHeader("X-Forwarded-For");
        if (StrUtil.isNotBlank(ip) && !"unknown".equalsIgnoreCase(ip)) {
            // 多次反向代理后会有多个IP值,第一个为真实IP
            int index = ip.indexOf(',');
            if (index != -1) {
                return ip.substring(0, index);
            }
            return ip;
        }
        
        ip = request.getHeader("X-Real-IP");
        if (StrUtil.isNotBlank(ip) && !"unknown".equalsIgnoreCase(ip)) {
            return ip;
        }
        
        return request.getRemoteAddr();
    }
}