const Logger = require('../Utils/Logger')
const frameViewers = {}

const TAG = '[FrameLinker]';
module.exports = {
  init: (io) => {
    io.sockets.on('connection', (socket) => {
      let key = null
      Logger.log(TAG, 'New connection from client: ', socket.id)
      socket.on('disconnect', () => {
        Logger.log(TAG, 'Frame Viewer disconnected disconnected')
        if(key){
          delete frameViewers[key];
        }
      });

      socket.on('register_key', (data) => {
        if(frameViewers[key]){
          Logger.warn(TAG, 'Key in use - sending register_fail')
          socket.emit('register_fail')
          return;
        }
        Logger.debug(TAG, 'Registering key ' + data.key)
        key = data.key
        frameViewers[key] = socket
        Logger.debug(TAG, 'is key', key, 'valid:', frameViewers.hasOwnProperty(key))
      })

    });
  },
  isKeyValid: (key)=>{
    Logger.debug(TAG, 'is key', key, 'valid:', frameViewers.hasOwnProperty(key))
    if(frameViewers.hasOwnProperty(key)) return true;
    return false;
  },
  linkFrame: (frameId, accessToken, key)=>{
    return new Promise((resolve, reject) => {
      if(!frameViewers[key]) reject('No Frame Viewer Found')
      else{
        frameViewers[key].emit('consume_frame', {frame_id: frameId, accessToken: accessToken})
        resolve()
      }
    });
  }
};