const WebSocket = require('ws')

const room = 'PERSIST' + Math.floor(Math.random() * 1000)
const base = 'ws://127.0.0.1:3000/ws?room=' + room

function connect(name) {
  return new Promise((resolve, reject) => {
    const ws = new WebSocket(base)
    const messages = []
    ws.on('message', (data) => {
      const msg = JSON.parse(data.toString())
      messages.push(msg)
      console.log(`[${name}]`, msg.type, msg.type === 'game_state' ? ` turn=${msg.turn_team} stones=${msg.stones.length}` : '')
      if (msg.type === 'joined') {
        resolve({ ws, messages, team: msg.team })
      }
    })
    ws.on('open', () => console.log(`[${name}] open`))
    ws.on('error', (e) => { console.error(`[${name}] error`, e.message); reject(e) })
    ws.on('close', (code) => console.log(`[${name}] close`, code))
  })
}

async function waitFor(condFn, timeout = 5000) {
  const start = Date.now()
  while (!condFn()) {
    if (Date.now() - start > timeout) throw new Error('Timeout waiting')
    await new Promise(r => setTimeout(r, 50))
  }
}

function latestState(messages) {
  for (let i = messages.length - 1; i >= 0; i--) {
    if (messages[i].type === 'game_state') return messages[i]
  }
  return null
}

;(async () => {
  const p1 = await connect('p1')
  await waitFor(() => p1.messages.some(m => m.type === 'waiting'))
  const p2 = await connect('p2')
  await waitFor(() => p2.messages.some(m => m.type === 'game_state'))

  // Determine the current player and throw two stones in the same end.
  let state = latestState(p1.messages)
  console.log('Initial state', state)

  // First throw: yellow aims slightly left of center.
  let turn = state.turn_team
  let turnPlayer = turn === p1.team ? p1 : p2
  turnPlayer.ws.send(JSON.stringify({ type: 'throw', broom_x: -0.3, broom_y: 39, weight: 7, curl: 1, friction: 1.0 }))
  await waitFor(() => latestState(p1.messages)?.stones?.length === 1, 15000)

  state = latestState(p1.messages)
  console.log('After first throw:', state)

  // Second throw: red aims slightly right of center.
  turn = state.turn_team
  turnPlayer = turn === p1.team ? p1 : p2
  turnPlayer.ws.send(JSON.stringify({ type: 'throw', broom_x: 0.3, broom_y: 39, weight: 7, curl: -1, friction: 1.0 }))
  await waitFor(() => latestState(p1.messages)?.stones?.length === 2, 15000)

  state = latestState(p1.messages)
  console.log('After second throw:', state)

  if (state.stones.length !== 2) throw new Error(`Expected 2 stones after second throw, got ${state.stones.length}`)

  // Check that ids are monotonic.
  const ids = state.stones.map(s => s.id).sort((a, b) => a - b)
  if (ids[0] !== 1 || ids[1] !== 2) throw new Error(`Unexpected stone ids: ${ids}`)

  // Both stones should be in play (near house).
  for (const s of state.stones) {
    if (s.y < 35 || s.y > 42) throw new Error(`Stone ${s.id} is out of house: y=${s.y}`)
  }

  console.log('PERSISTENCE E2E PASSED')
  p1.ws.close()
  p2.ws.close()
  process.exit(0)
})().catch(err => {
  console.error(err)
  process.exit(1)
})