import fs from 'fs'
import path from 'path'
export type ExamplesType = {
  name: string
  path: string
  children?: ExamplesType[]
}

export async function resolveAllExamples(...paths: string[]) {
  const base = path.resolve(process.cwd(), ...paths)

  if (!fs.existsSync(base)) {
    return false
  }

  const files = await fs.promises.readdir(base, { withFileTypes: true })
  const items: ExamplesType[] = []

  for (let file of files) {
    // Skip reserved filenames from Next. E.g.: _app.tsx, _error.tsx
    if (file.name.startsWith('_')) {
      continue
    }

    const bucket: ExamplesType = {
      name: file.name.replace(/-/g, ' ').replace(/\.tsx?/g, ''),
      path: [...paths, file.name]
        .join('/')
        .replace(/^pages/, '')
        .replace(/\.tsx?/g, '')
        .replace(/\/+/g, '/'),
    }

    if (file.isDirectory()) {
      const children = await resolveAllExamples(...paths, file.name)

      if (children) {
        bucket.children = children
      }
    }

    items.push(bucket)
  }

  return items
}