import { context } from 'esbuild';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import { spawn } from 'node:child_process';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const root = path.resolve(__dirname, '..');

function spawnShell(command, opts = {}) {
  const child = spawn(command, {
    cwd: root,
    stdio: 'inherit',
    shell: true,
    ...opts,
  });
  child.on('exit', (code) => {
    if (code !== 0 && code !== null) {
      process.exitCode = code;
    }
  });
  return child;
}

/** Убивает дерево процессов (на Windows `child.kill()` часто не гасит Vite на 5173). */
function killTree(child) {
  if (!child || child.killed) return;
  if (typeof child.exitCode === 'number' && child.exitCode !== null) return;
  if (process.platform === 'win32' && child.pid) {
    spawn('taskkill', ['/PID', String(child.pid), '/T', '/F'], {
      stdio: 'ignore',
      windowsHide: true,
      detached: true,
    });
  } else {
    try {
      child.kill('SIGTERM');
    } catch {
      /* ignore */
    }
  }
}

async function watchMainAndPreload() {
  const main = await context({
    entryPoints: [path.join(root, 'app/main/index.ts')],
    outfile: path.join(root, 'dist/main/index.cjs'),
    platform: 'node',
    target: 'node22',
    format: 'cjs',
    bundle: true,
    sourcemap: true,
    external: ['electron'],
    define: { 'process.env.NODE_ENV': JSON.stringify('development') },
  });
  await main.rebuild();
  await main.watch();

  const preload = await context({
    entryPoints: [path.join(root, 'app/preload/index.ts')],
    outfile: path.join(root, 'dist/preload/index.cjs'),
    platform: 'node',
    target: 'node22',
    format: 'cjs',
    bundle: true,
    sourcemap: true,
    external: ['electron'],
    define: { 'process.env.NODE_ENV': JSON.stringify('development') },
  });
  await preload.rebuild();
  await preload.watch();

  return async () => {
    await Promise.all([main.dispose(), preload.dispose()]);
  };
}

const dispose = await watchMainAndPreload();
const vite = spawnShell('npx vite dev --strictPort', {
  env: {
    ...process.env,
    NODE_ENV: 'development',
    DND_SKIP_LICENSE: process.env.DND_SKIP_LICENSE ?? '1',
    VITE_DEV_SERVER_URL: 'http://localhost:5173/',
  },
});
const electron = spawnShell('npx electron .', {
  env: {
    ...process.env,
    NODE_ENV: 'development',
    DND_SKIP_LICENSE: process.env.DND_SKIP_LICENSE ?? '1',
    VITE_DEV_SERVER_URL: 'http://localhost:5173/',
  },
});

let shuttingDown = false;

const shutdown = async () => {
  if (shuttingDown) return;
  shuttingDown = true;
  killTree(vite);
  killTree(electron);
  await dispose();
  process.exit(0);
};

process.on('SIGINT', () => void shutdown());
process.on('SIGTERM', () => void shutdown());

electron.once('exit', () => {
  void shutdown();
});

vite.once('exit', (code) => {
  if (code !== 0 && code !== null && !shuttingDown) {
    void shutdown();
  }
});