import { rmSync } from 'fs';
import path from 'path';
import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';
import electron from 'vite-electron-plugin';
import { customStart } from 'vite-electron-plugin/plugin';
import pkg from './package.json';

rmSync(path.join(__dirname, 'dist-electron'), { recursive: true, force: true });

// https://vitejs.dev/config/
export default defineConfig({
  resolve: {
    alias: {
      '@': path.join(__dirname, 'src'),
      styles: path.join(__dirname, 'src/assets/styles'),
    },
  },
  plugins: [
    react(),
    electron({
      outDir: path.join(__dirname, 'release/app/dist'),
      include: ['electron', 'preload', 'types'],
      transformOptions: {
        sourcemap: !!process.env.VSCODE_DEBUG,
      },
      // Will start Electron via VSCode Debug
      plugins: process.env.VSCODE_DEBUG
        ? [customStart(debounce(() => console.log(/* For `.vscode/.debug.script.mjs` */ '[startup] Electron App')))]
        : undefined,
    }),
  ],
  server: process.env.VSCODE_DEBUG
    ? (() => {
        const url = new URL(pkg.debug.env.VITE_DEV_SERVER_URL);
        return {
          host: url.hostname,
          port: +url.port,
        };
      })()
    : undefined,
  clearScreen: false,
});

function debounce<Fn extends (...args: any[]) => void>(fn: Fn, delay = 299) {
  let t: NodeJS.Timeout;
  return ((...args) => {
    clearTimeout(t);
    t = setTimeout(() => fn(...args), delay);
  }) as Fn;
}