package com.ard.tianyu.service.control;
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import com.ard.common.exception.NoPermissionException;
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import com.ard.common.utils.SecurityUtils;
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import com.ard.tianyu.websocket.domain.UavControlType;
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import com.ard.tianyu.websocket.handler.UavControlManager;
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import org.springframework.stereotype.Service;
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import javax.annotation.Resource;
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import java.util.concurrent.ConcurrentHashMap;
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/**
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* UAV控制服务类，负责管理对飞行和载荷的控制请求、释放和权限管理。
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*/
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@Service
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public class UavControlService {
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@Resource
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private UavControlManager uavControlManager;
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/**
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* 记录当前获得飞行控制权限的用户
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*/
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private final ConcurrentHashMap<String, Long> uavFlyControlMap = new ConcurrentHashMap<>();
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/**
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* 记录当前获得载荷控制权限的用户
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*/
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private final ConcurrentHashMap<String, Long> uavPayloadControlMap = new ConcurrentHashMap<>();
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/**
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* 记录飞行控制请求
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*/
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private final ConcurrentHashMap<String, Long> flyControlRequests = new ConcurrentHashMap<>();
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/**
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* 记录载荷控制请求
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*/
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private final ConcurrentHashMap<String, Long> payloadControlRequests = new ConcurrentHashMap<>();
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/**
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* 请求获取 UAV 控制权限
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*
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* @param boxSn 设备序列号
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* @param type 控制类型（"fly"、"payload"）
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* @return 是否立即获得控制权限
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*/
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public boolean requestControl(String boxSn, String type) {
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UavControlType controlType = UavControlType.fromString(type);
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Long requester = SecurityUtils.getUserId();
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return requestSingleControl(boxSn, controlType, requester);
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}
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/**
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* 处理单个控制类型的请求
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*/
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private boolean requestSingleControl(String boxSn, UavControlType controlType, Long requester) {
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ConcurrentHashMap<String, Long> controlMap = getControlMap(controlType);
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ConcurrentHashMap<String, Long> requestMap = getRequestMap(controlType);
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Long controller = controlMap.get(boxSn);
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if (controller == null) {
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controlMap.put(boxSn, requester);
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return true;
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}
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if (!controller.equals(requester)) {
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requestMap.put(boxSn, requester);
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uavControlManager.sendControlRequest(controller, boxSn, controlType.getType(), requester);
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} else {
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throw new NoPermissionException("当前已拥有控制权");
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}
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return false;
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}
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/**
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* 处理 UAV 控制请求的响应（同意或拒绝）
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*
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* @param boxSn 设备序列号
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* @param approve 是否同意
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* @param type 控制类型
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* @return 是否成功处理
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*/
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public boolean handleControlResponse(String boxSn, boolean approve, String type) {
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UavControlType controlType = UavControlType.fromString(type);
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Long controller = SecurityUtils.getUserId();
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return handleSingleControlResponse(boxSn, approve, controlType, controller);
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}
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/**
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* 处理单个控制类型的请求响应
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*/
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private boolean handleSingleControlResponse(String boxSn, boolean approve, UavControlType controlType,
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Long controller) {
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ConcurrentHashMap<String, Long> requestMap = getRequestMap(controlType);
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Long requester = requestMap.get(boxSn);
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if (requester == null || requester.equals(controller)) {
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throw new NoPermissionException("无控制请求");
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}
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if (approve) {
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getControlMap(controlType).put(boxSn, requester);
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uavControlManager.sendControlApproval(requester, boxSn, controlType.getType());
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} else {
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uavControlManager.sendControlRejection(requester, boxSn, controlType.getType());
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}
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requestMap.remove(boxSn);
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return true;
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}
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/**
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* 释放 UAV 控制权限
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*
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* @param boxSn 设备序列号
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* @param type 控制类型
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* @return 是否成功释放控制
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*/
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public boolean releaseControl(String boxSn, String type) {
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UavControlType controlType = UavControlType.fromString(type);
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Long controller = SecurityUtils.getUserId();
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return releaseSingleControl(boxSn, controlType, controller);
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}
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/**
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* 释放单个控制类型的权限
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*/
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private boolean releaseSingleControl(String boxSn, UavControlType controlType, Long controller) {
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ConcurrentHashMap<String, Long> controlMap = getControlMap(controlType);
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if (!controller.equals(controlMap.get(boxSn))) {
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throw new NoPermissionException("没有该设备的" + controlType.getType().toUpperCase() + "控制权");
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}
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controlMap.remove(boxSn);
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uavControlManager.sendControlRelease(boxSn, controlType.getType());
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return true;
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}
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/**
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* 释放用户所有 UAV 控制权
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*/
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public void releaseAllControls(Long userId) {
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// 释放飞行控制
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uavFlyControlMap.entrySet().removeIf(entry -> entry.getValue().equals(userId));
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// 释放载荷控制
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uavPayloadControlMap.entrySet().removeIf(entry -> entry.getValue().equals(userId));
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}
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/**
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* 获取当前某设备的控制用户
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*
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* @param boxSn 设备序列号
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* @param type 控制类型
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* @return 当前控制该设备的用户 ID
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*/
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public Long getCurrentController(String boxSn, String type) {
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UavControlType controlType = UavControlType.fromString(type);
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return getControlMap(controlType).get(boxSn);
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}
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/**
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* 根据控制类型获取对应的控制 Map
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*/
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private ConcurrentHashMap<String, Long> getControlMap(UavControlType controlType) {
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switch (controlType) {
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case FLY:
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return uavFlyControlMap;
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case PAYLOAD:
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return uavPayloadControlMap;
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default:
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throw new IllegalArgumentException("不支持的控制类型");
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}
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}
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/**
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* 根据控制类型获取对应的请求 Map
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*/
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private ConcurrentHashMap<String, Long> getRequestMap(UavControlType controlType) {
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switch (controlType) {
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case FLY:
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return flyControlRequests;
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case PAYLOAD:
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return payloadControlRequests;
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default:
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throw new IllegalArgumentException("不支持的控制类型");
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}
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}
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}
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