import csv from 'csv-parser'
import fs from 'fs'

const data_directory = '/srv/public_library_map/website/data'
// read json file into memory
const mapData = fs.readFileSync(`${data_directory}/boundaries.topo.json`)
let data = JSON.parse(mapData)
let geometries = data.objects['boundaries.geo'].geometries

// read csv file
// 'data' should be a single line (excl headers)
fs.createReadStream(`${data_directory}/library_services_information.csv`)
  .pipe(csv())
  .on('data', (data) => {
    for (let feature in geometries) {
            if (geometries[feature].properties.name == data.name) {
              for (let k in data) {
                if (k != "long_name" && k != "") {
                  geometries[feature].properties[k] = data[k]
              }
            }
        }
    }
  })
  .on('end', () => {
    // write back to object
    data.objects['boundaries.geo'].geometries = geometries
    // write back to file
    try {
      fs.writeFileSync(`${data_directory}/boundaries.topo.json`, JSON.stringify(data))
    } catch (err) {
      console.err('ERROR writing topo file')
    }
     console.log('topo updated')
  })