import { readdir } from 'node:fs/promises'
import { join } from 'node:path'
const walkDir = async function* (dir = '.', exclude = []) {
  const files = await readdir(dir, { withFileTypes: true })

  for (const file of files) {
    if (exclude.includes(file.name)) continue

    if (file.isDirectory()) {
      yield* walkDir(join(dir, file.name))
    } else {
      yield join(dir, file.name)
    }
  }
}

import { fileURLToPath } from 'node:url'
import { dirname } from 'node:path'
const getStackAbsolutePaths = () => {
  const old = Error.prepareStackTrace
  Error.prepareStackTrace = (_, stack) => stack
  const stack = new Error().stack
  Error.prepareStackTrace = old

  return stack
    .map(cs => cs.getFileName())
    .filter(filename => filename?.startsWith('file://'))
    .map(filename => dirname(fileURLToPath(filename)))
}

import { summaryreporter, errorreporter, totalreporter } from 'metaltest'
const suite = async (folder = '.') => {
  const absolutePaths = getStackAbsolutePaths()
  const absolutePath = absolutePaths[2]
  const fileIgnored = []

  const total = totalreporter()

  for await (const file of walkDir(folder, ['node_modules', '.git'])) {
    if (!file.endsWith('.test.js')) continue

    const module = join(absolutePath, file)
    const { test } = await import(module)

    if (test === undefined) {
      fileIgnored.push(file)
      continue
    }

    await test.run(summaryreporter(), errorreporter(), total)
  }

  for (const file of fileIgnored) {
    console.log(`The file ${file} doesn't export the metaltest object`)
  }

  console.log(total.msg())
}

export { suite }