const path = require('path')
const Axios = require('axios')
const { readFile, cacheDir, mkdirAndWriteFile } = require('../paths')

async function getMetadata() {
  const cacheFile = path.join(cacheDir, 'gutenberg-metadata.json')
  try {
    const fileContents = await readFile(cacheFile)
    return JSON.parse(fileContents)
  } catch (err) {}

  console.log('Downloading metadata from GitHub')
  const metadata = await Axios.get(
    'https://hugovk.github.io/gutenberg-metadata/gutenberg-metadata.json'
  ).then(res => res.data)

  await mkdirAndWriteFile(cacheFile, JSON.stringify(metadata))
  return metadata
}

module.exports = { getMetadata }