const ProtoDef = require('protodef').ProtoDef
const Serializer = require('protodef').Serializer
const Parser = require('protodef').Parser

// the protocol can be in a separate json file
const exampleProtocol = {
  container: 'native',
  varint: 'native',
  byte: 'native',
  bool: 'native',
  switch: 'native',
  entity_look: [
    'container',
    [
      {
        name: 'entityId',
        type: 'varint'
      },
      {
        name: 'yaw',
        type: 'i8'
      },
      {
        name: 'pitch',
        type: 'i8'
      },
      {
        name: 'onGround',
        type: 'bool'
      }
    ]
  ],
  packet: [
    'container',
    [
      {
        name: 'name',
        type: [
          'mapper',
          {
            type: 'varint',
            mappings: {
              22: 'entity_look'
            }
          }
        ]
      },
      {
        name: 'params',
        type: [
          'switch',
          {
            compareTo: 'name',
            fields: {
              entity_look: 'entity_look'
            }
          }
        ]
      }
    ]
  ]
}

const proto = new ProtoDef()
proto.addTypes(exampleProtocol)
const parser = new Parser(proto, 'packet')
const serializer = new Serializer(proto, 'packet')

serializer.write({
  name: 'entity_look',
  params: {
    entityId: 1,
    yaw: 1,
    pitch: 1,
    onGround: true
  }
})
serializer.pipe(parser)

parser.on('data', function (chunk) {
  console.log(JSON.stringify(chunk, null, 2))
})