const WebSocket = require('ws')

const base = (room) => `ws://127.0.0.1:3000/ws?room=${room}`

function connect(name, room) {
  return new Promise((resolve, reject) => {
    const ws = new WebSocket(base(room))
    const messages = []
    ws.on('open', () => resolve({ ws, messages }))
    ws.on('message', (data) => messages.push(JSON.parse(data.toString())))
    ws.on('error', reject)
  })
}

function waitFor(messages, pred, timeout = 10000) {
  const start = Date.now()
  return new Promise((resolve, reject) => {
    const check = () => {
      if (pred()) return resolve(undefined)
      if (Date.now() - start > timeout) return reject(new Error('timeout'))
      setTimeout(check, 50)
    }
    check()
  })
}

;(async () => {
  const room = 'ROOMFULL' + Math.floor(Math.random() * 1000)
  const p1 = await connect('p1', room)
  const p2 = await connect('p2', room)
  await waitFor(p1.messages, () => p1.messages.some(m => m.type === 'game_state'), 5000)
  const p3 = await connect('p3', room)
  await waitFor(p3.messages, () => p3.messages.some(m => m.type === 'error'), 2000)
  const p3error = p3.messages.some(m => m.type === 'error' && m.message.includes('Room is full'))
  const p1error = p1.messages.some(m => m.type === 'error' && m.message.includes('Room is full'))
  const p2error = p2.messages.some(m => m.type === 'error' && m.message.includes('Room is full'))
  console.log({ p3error, p1error, p2error })
  if (!p3error) throw new Error('p3 should get room full error')
  if (p1error || p2error) throw new Error('existing players should not see room-full error')
  p1.ws.close()
  p2.ws.close()
  p3.ws.close()
  process.exit(0)
})().catch((e) => {
  console.error(e)
  process.exit(1)
})