var fs = require('fs')

function bump(version, level) {
  var parts = version.split('.')
  var i
  for (i = 0; i < level; i++) {
    parts[i] = parts[i] || '0'
  }
  parts[level - 1] = +parts[level - 1] + 1
  for (i = level; i < parts.length; i++) {
    parts[i] = '0'
  }
  return parts.join('.')
}

function setversion(version) {
  var data = { version: version, date: new Date() }
  fs.writeFileSync('version.json', JSON.stringify(data, null, 2))
}

var level = +process.argv[2]
var v = JSON.parse(fs.readFileSync('version.json', 'utf8'))
var oldversion = v.version
var version = bump(oldversion, level)
setversion(version)
console.log(`Version updated from v${oldversion} to v${version}.`)