export class SyncClient {
  constructor({ onEvent, onError }) {
    this.socket = null
    this.onEvent = onEvent
    this.onError = onError
  }

  connect(baseUrl, roomCode, deviceId) {
    this.close()
    const wsBase = baseUrl.replace(/\/$/, '').replace('http://', 'ws://').replace('https://', 'wss://')
    this.socket = uni.connectSocket({
      url: `${wsBase}/ws?roomCode=${encodeURIComponent(roomCode)}&deviceId=${encodeURIComponent(deviceId)}`,
      complete: () => {}
    })
    this.socket.onMessage((message) => {
      const data = JSON.parse(message.data)
      this.onEvent(data.type, data.payload || {})
    })
    this.socket.onError((err) => this.onError(JSON.stringify(err)))
    this.socket.onClose(() => this.onError('websocket closed'))
  }

  close() {
    if (this.socket) {
      this.socket.close({})
      this.socket = null
    }
  }

  setSource(source) {
    this.send('setSource', source)
  }

  play(positionMs) {
    this.send('play', { positionMs })
  }

  pause(positionMs) {
    this.send('pause', { positionMs })
  }

  syncToLive() {
    this.send('syncToLive', { state: 'playing', positionMs: 0, targetLatencyMs: 3000 })
  }

  send(type, payload) {
    if (!this.socket) return
    this.socket.send({
      data: JSON.stringify({ type, payload })
    })
  }
}