let net = require("net");
const express = require("express");
const path = require("path");
const { ipcMain } = require('electron');
// const bodyParser = require("body-parser");
import { GetHomeDir } from "./config";

let SERVER_PORTS = 55110;

/**
 * 检测端口是否被占用
 * @param port
 * @param cb
 */

function portIsOccupied(port, cb) {
  // 创建服务并监听该端口
  port = Number(port);
  let server = net.createServer().listen(port);

  server.on("listening", function() {
    // 执行这块代码说明端口未被占用
    server.close(); // 关闭服务
    console.log("端口【" + port + "】 可用"); // 控制台输出信息
    SERVER_PORTS = port;
    cb(port);
  });

  server.on("error", function(err) {
    if (err.code === "EADDRINUSE") {
      // 端口已经被使用
      console.log("端口【" + port + "】 被占用");
      portIsOccupied(++port, cb);
    }
  });
}

let apps;
let availablePort

function createApp() {
  apps = express();
  // app.use(bodyParser.json());
  // app.use(bodyParser.urlencoded({ extended: true }));

  let prefix =
    process.env.NODE_ENV === "development"
      ? ""
      : "resources/app.asar/out/renderer/";
  let static_path = ["./", "src/renderer/public"];
  let home_dir = GetHomeDir();
  static_path.forEach((p) => {
    apps.use(
      express.static(
        path.join(path.join(home_dir, prefix), p) /*{maxAge: 60 * 1000 * 5}*/
      )
    );
  });
}
function start() {
  createApp();
  portIsOccupied(SERVER_PORTS, (port) => {
    // avilablePort挂载全局
    // console.log(apps); 
    apps.listen(port);
    availablePort = port;
    // console.log("global.sharedObject", global.avilablePort);
    global.sharedObject.availablePort = port;
    // ipcRenderer.invoke("set-global-variable", "avilablePort", avilablePort);
  });
}
//获取项目根目录
// function GetHomeDir() {
//   let HOME_DIR = process.cwd()

//   if (process.env.NODE_ENV === 'production') {
//     let arr = process.execPath.replaceAll("\\", "/").split("/")
//     arr.pop()
//     HOME_DIR = arr.join("/")
//   }
//   return HOME_DIR
// }

ipcMain.handle('get-available-port', () => {
  return availablePort;
});

export { apps, start };