import fs from 'fs'

const databaseCSV = fs.readFileSync('database.csv', {encoding:'utf8', flag:'r'})

export function splitNewLines(string) {
  return string.split(/\n/)
}

export function cleanupArrayOfStrings(arrayOfStrings) {
  return arrayOfStrings
    .map(line => line.trim())
    .filter(line => line != '')
}

export function stringCsvToDataObject(string) {
  let splitString = string.split(',')
  if (splitString[2].trim() == '') splitString[2] = splitString[1]

  const [
    nominative,
    accusative,
    pronominalPossessive,
    predicativePossessive,
    reflexive,
  ] = cleanupArrayOfStrings(splitString)

  return {
    nominative, accusative, pronominalPossessive, predicativePossessive, reflexive
  }
}

export default function() {
  const databaseCSV = fs.readFileSync('database.csv', {encoding:'utf8', flag:'r'})
  return cleanupArrayOfStrings(splitNewLines(databaseCSV)).map(line => stringCsvToDataObject(line))
}