// resolve rnx's bundled assets (fonts, icons, sounds)
// regardless of how the package was installed (source checkout, npm install, bunx).
//
// uses import.meta.url to derive the package root, then checks both
// the source layout (public/) and npm-installed layout (public/).

import { existsSync, readFileSync } from 'fs'
import { dirname, resolve } from 'path'
import { fileURLToPath } from 'url'
import { rnxPublicBrand } from '../src/public-brand'

// when bundled by esbuild, this file lives at dist-cli/bin.js
// when running from source, this file lives at cli/resolve-assets.ts
const thisDir = dirname(fileURLToPath(import.meta.url))

// walk up to find package root: look for package.json with the rnxsim package name
function findPackageRoot(): string {
  let dir = thisDir
  for (let i = 0; i < 5; i++) {
    try {
      const pkgPath = resolve(dir, 'package.json')
      if (existsSync(pkgPath)) {
        const pkg = JSON.parse(readFileSync(pkgPath, 'utf8'))
        if (pkg.name === rnxPublicBrand.packageName) return dir
      }
    } catch {}
    dir = dirname(dir)
  }
  // fallback: assume one level up from this file
  return dirname(thisDir)
}

const packageRoot = findPackageRoot()

export interface SootSimAssets {
  fontsDir: string
  iconsDir: string
  soundsDir: string
  packageRoot: string
}

export function resolveAssets(): SootSimAssets {
  // both source and npm-installed layouts use public/ at the package root
  const publicDir = resolve(packageRoot, 'public')

  const fontsDir = resolve(publicDir, 'fonts')
  const iconsDir = resolve(publicDir, 'icons')
  const soundsDir = resolve(publicDir, 'sounds')

  if (!existsSync(fontsDir)) {
    console.warn(`[rnx] warning: fonts directory not found at ${fontsDir}`)
  }

  return {
    fontsDir,
    iconsDir,
    soundsDir,
    packageRoot,
  }
}

// re-export packageRoot for use in CLI commands that need SOOTSIM_ROOT
export { packageRoot }