package com.zksy.lamp.server;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * @author Administrator
 * @version 1.0
 * @project dh-server-micro
 * @description 指令执行
 * @date 2025/2/10 16:25:14
 */
@Component
public class ExecutionServer {
    private BufferedReader reader;
    private BufferedWriter writer;
    private ServerSocket server;
    private Socket client;
    private int serverPort = 15678;

    @PostConstruct
    public void init(){
        Runnable func0 = this::startServer;
        Thread thread = new Thread(func0);
        thread.start();
    }

    @PreDestroy
    public void closeResource(){
        try {
            if (reader != null) reader.close();
            if (writer != null) writer.close();
            if (client != null) client.close();
            if (server != null) server.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 启动服务器并等待客户端连接
     */
    public void startServer() {
        try {
            System.out.println("本机作为服务端");
            System.out.println("本机端口：" + serverPort);
            server = new ServerSocket(serverPort);

            System.out.println("等待客户机的连接");
            client = server.accept();
            System.out.println("连接成功");

            String clientAddr = client.getRemoteSocketAddress().toString().substring(1);
            String[] clientAddrs = clientAddr.split(":");
            System.out.println("客户端IP：" + clientAddrs[0] + " 端口：" + clientAddrs[1]);

            reader = new BufferedReader(new InputStreamReader(client.getInputStream(), "GB2312"));
            writer = new BufferedWriter(new OutputStreamWriter(client.getOutputStream(), "GB2312"));
            System.out.println("测试完成！");

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public String ExecutionData(String msg) {
        try {
            System.out.println("第1路闭合，发送指令："+msg);
            //发送数据
            writer.write(msg);
            writer.flush();
            //读数据
            msg = reader.readLine();
            System.out.println("msg================："+msg);
            if (msg != null) {
                msg = msg.replace("\r\n", "\\r\\n");
            } else {
                System.out.println("接收到的消息为 null，重新建立连接...");
                // 关闭当前连接资源
                closeResource();
                // 重新启动服务器并等待客户端连接
                startServer();
                // 重新发送指令
                writer.write(msg);
                writer.flush();
                msg = reader.readLine();
                System.out.println("重新连接后接收到的消息：" + msg);
            }
            msg = msg.replace("\r\n", "\\r\\n");
            System.out.println("设备应答：" + msg);
            System.out.println("指令执行成功!");
            Thread.sleep(100);
            return msg;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "发送指令："+msg+"失败";
    }
}