const path = require('path')

const { getMetadata } = require('./getMetadata')
const { parseMetadata } = require('./parseMetadata')
const { mkdirAndWriteFile, dataDir } = require('../paths')

async function main() {
  const parsedData = [...parseMetadata(await getMetadata())]
  const tsvData = parsedData.map(entryToRow)

  mkdirAndWriteFile(
    path.join(dataDir, 'PG-meta.json'),
    JSON.stringify(parsedData, undefined, 2)
  )
  mkdirAndWriteFile(path.join(dataDir, 'PG-meta.tsv'), formatTsv(tsvData))
}

function entryToRow(entry) {
  return [
    entry.id,
    (entry.title[0] || '').replace(/[\r\n]+/gm, ''),
    entry.author.join('|'),
    entry.language.join('|'),
    entry.subject.join('|'),
    entry.textUris.join('|'),
    entry.pictures.join('|')
  ]
}

function formatTsv(array2D) {
  return array2D
    .map(row => row.join('\t'))
    .join('\n')
    .replace(/"/gm, '\\"')
}

main()