if (process.argv.length < 3) {
  throw `Usage: ${process.argv[1]} path_prefix`
}
const PATH_PREFIX = process.argv[2]

const path = require('path')
const AWS = require('aws-sdk')
const ssm = new AWS.SSM()

function getParametersByPath(nextToken, callback) {
  const params = { Path: PATH_PREFIX, Recursive: true, WithDecryption: true }
  if (nextToken) params['NextToken'] = nextToken
  ssm.getParametersByPath(params, (err, data) => {
    if (err) throw err
    callback(data)
  })
}

function printParameter(parameter) {
  const envName = path.basename(parameter.Name)
  console.log(`${envName}="${parameter.Value}"`)
}

function handleResponse(response) {
  if (response.Parameters.length === 0) return
  response.Parameters.forEach(printParameter)
  if (!response.NextToken) return
  getParametersByPath(response.NextToken, handleResponse)
}

getParametersByPath(null, handleResponse)