addressgen/desktop/main.js

const { app, BrowserWindow } = require("electron");
const path = require("path");
const { spawn } = require("child_process");

const BACKEND_PORT = process.env.ADDRESSGEN_PORT || "8732";
const API_BASE = `http://127.0.0.1:${BACKEND_PORT}`;

let backendProcess = null;

function startBackend() {
  const env = {
    ...process.env,
    ADDRESSGEN_PORT: BACKEND_PORT,
  };

  if (process.env.BACKEND_BIN) {
    backendProcess = spawn(process.env.BACKEND_BIN, [], { env, stdio: "inherit" });
    return;
  }

  if (app.isPackaged) {
    const binPath = path.join(process.resourcesPath, "backend", "addressgen-backend");
    backendProcess = spawn(binPath, [], { env, stdio: "inherit" });
  } else {
    const python = process.env.PYTHON || "python3";
    const script = path.join(__dirname, "..", "backend", "app.py");
    backendProcess = spawn(python, [script], { env, stdio: "inherit" });
  }
}

function createWindow() {
  process.env.ADDRESSGEN_API_BASE = API_BASE;

  const win = new BrowserWindow({
    width: 1100,
    height: 720,
    webPreferences: {
      preload: path.join(__dirname, "preload.js"),
      contextIsolation: true,
      nodeIntegration: false,
    },
  });

  if (app.isPackaged) {
    win.loadFile(path.join(__dirname, "renderer", "index.html"));
  } else {
    win.loadURL("http://localhost:5173");
  }
}

app.whenReady().then(() => {
  startBackend();
  createWindow();

  app.on("activate", () => {
    if (BrowserWindow.getAllWindows().length === 0) {
      createWindow();
    }
  });
});

app.on("before-quit", () => {
  if (backendProcess) {
    backendProcess.kill();
  }
});