const { contextBridge, ipcRenderer } = require('electron');
const path = require('path');

const fakeIpcRenderer = {
  invoke: (channel, ...args) => ipcRenderer.invoke(channel, ...args),
  on: (channel, callback) => {
    const listener = (_event, ...args) => callback(...args);
    ipcRenderer.on(channel, listener);
    return () => ipcRenderer.removeListener(channel, listener);
  },
};

const fakeElectronModule = {
  ipcRenderer: fakeIpcRenderer,
  app: null,
  BrowserWindow: null,
  dialog: null,
  ipcMain: null,
};

const fakePathModule = {
  join: (...args) => path.join(...args),
  dirname: (p) => path.dirname(p),
  basename: (p) => path.basename(p),
  extname: (p) => path.extname(p),
  sep: path.sep,
  resolve: (...args) => path.resolve(...args),
};

contextBridge.exposeInMainWorld('electronAPI', {
  ipcRenderer: fakeIpcRenderer,
});

contextBridge.exposeInMainWorld('createModuleRequire', () => {
  return function requirePolyfill(moduleName) {
    if (moduleName === 'electron') {
      return fakeElectronModule;
    }
    if (moduleName === 'path') {
      return fakePathModule;
    }
    if (moduleName === 'fs') {
      throw new Error('Direct fs access disabled. Use IPC.');
    }
    if (moduleName.startsWith('./')) {
      const baseName = moduleName.replace('./', '').replace('.js', '');
      const mod = window[baseName];
      if (mod) return mod;
      throw new Error(`Module not found: ${moduleName}`);
    }
    throw new Error(`Module not allowed: ${moduleName}`);
  };
});