#!/usr/bin/env node
/**
 * Build the Fabric web frontend and copy the static bundle into www/ so the
 * Capacitor Android app ships it. Capacitor serves www/ from http://localhost
 * with SPA index.html fallback, so the standard (absolute-base) build +
 * BrowserRouter work as-is.
 *
 * Fabric.Frontend is the sibling submodule under the parent Fabric repo.
 */
import { execSync } from 'node:child_process'
import fs from 'node:fs'
import path from 'node:path'
import { fileURLToPath } from 'node:url'

const __dirname = path.dirname(fileURLToPath(import.meta.url))
const ROOT = path.resolve(__dirname, '..')
const FRONTEND = path.resolve(ROOT, '..', 'Fabric.Frontend')
const SRC = path.join(FRONTEND, 'dist')
const DEST = path.join(ROOT, 'www')

if (!fs.existsSync(FRONTEND)) {
  console.error(`[build-web] Fabric.Frontend not found at ${FRONTEND}`)
  process.exit(1)
}

console.log('[build-web] building frontend…')
execSync('npm install --no-audit --no-fund', { cwd: FRONTEND, stdio: 'inherit' })
execSync('npm run build', { cwd: FRONTEND, stdio: 'inherit' })

if (!fs.existsSync(path.join(SRC, 'index.html'))) {
  console.error(`[build-web] expected ${SRC}/index.html after build`)
  process.exit(1)
}

fs.rmSync(DEST, { recursive: true, force: true })
fs.cpSync(SRC, DEST, { recursive: true })
console.log(`[build-web] copied ${SRC} -> ${DEST}`)