/**
 * copy-web-dist.ts
 *
 * Prebuild script for apps/desktop.
 * Copies the build output of the target web app into ./web-dist/
 * so electron-builder can bundle it into the packaged application.
 *
 * Reads DESKTOP_TARGET_APP from .env (default: "web").
 *
 * Directory layout:
 *   monorepo-root/
 *     apps/
 *       desktop/
 *         scripts/       ← this file lives here
 *         web-dist/      ← destination
 *       web/
 *         dist/          ← source
 */

import { cpSync, existsSync, mkdirSync, rmSync, readFileSync } from 'fs';
import { resolve } from 'path';
import { fileURLToPath } from 'url';

// ── Resolve paths ──────────────────────────────────────────────
// Use import.meta.url for ESM compatibility (works across Node versions)
const SCRIPT_DIR = resolve(fileURLToPath(import.meta.url), '..');
const DESKTOP_DIR = resolve(SCRIPT_DIR, '..');
const MONOREPO_ROOT = resolve(DESKTOP_DIR, '..', '..');
const DEST_DIR = resolve(DESKTOP_DIR, 'web-dist');

// ── Read .env for target app name ──────────────────────────────
function loadTargetApp(): string {
  const envPath = resolve(DESKTOP_DIR, '.env');
  if (existsSync(envPath)) {
    const content = readFileSync(envPath, 'utf-8');
    const match = content.match(/^DESKTOP_TARGET_APP=(.+)$/m);
    if (match) return match[1].trim();
  }
  return 'web';
}

const targetApp = process.env.DESKTOP_TARGET_APP || loadTargetApp();
const SOURCE_DIR = resolve(MONOREPO_ROOT, 'apps', targetApp, 'dist');

// ── Debug: print resolved paths ────────────────────────────────
console.log(`\n📦  copy-web-dist`);
console.log(`    Target app   : ${targetApp}`);
console.log(`    Monorepo root: ${MONOREPO_ROOT}`);
console.log(`    Source       : ${SOURCE_DIR}`);
console.log(`    Destination  : ${DEST_DIR}`);

// ── Validate ───────────────────────────────────────────────────
if (!existsSync(SOURCE_DIR)) {
  console.error(
    `\n❌  Build output not found at: ${SOURCE_DIR}\n` +
      `    Run "pnpm build --filter=${targetApp}" first.\n`,
  );
  process.exit(1);
}

// ── Clean destination ──────────────────────────────────────────
if (existsSync(DEST_DIR)) {
  rmSync(DEST_DIR, { recursive: true, force: true });
}
mkdirSync(DEST_DIR, { recursive: true });

// ── Copy ───────────────────────────────────────────────────────
cpSync(SOURCE_DIR, DEST_DIR, { recursive: true });

console.log(`✅  Copied ${targetApp} build → web-dist/\n`);