var Vue = window.Vue;
var Peer = window.Peer;
var app = new Vue({
  el: '#app',
  data: {
    peer: new Peer({
      host: '/',
      path: '/peerjs/myapp'
    }),
    stream: null,
  },
  methods: {
    logMessage: function(message) {
      let newMessage = document.createElement('div');
      newMessage.innerText = message;
      document.querySelector('.messages').appendChild(newMessage);
    },
    renderVideo:function(stream, selector = '#remoteVideo') {
      document.querySelector(selector).srcObject = stream;
    },
    connectToPeer: function() {
      let peerId = this.peer.id;
      this.logMessage(`Connecting to ${peerId}...`);

      let conn = this.peer.connect(peerId);
      conn.on('data', (data) => {
        this.logMessage(`received: ${data}`);
      });
      conn.on('open', () => {
        conn.send('hi!');
      });

      let call = this.peer.call(this.peerId, this.stream);
      call.on('stream', this.renderVideo);
      // navigator.mediaDevices.getUserMedia({video: true, audio: true})
      //   .then((stream) => {
      //     let call = peer.call(peerId, stream);
      //     call.on('stream', renderVideo);
      //   })
      //   .catch((err) => {
      //     logMessage('Failed to get local stream', err);
      //   });
    },
    listenForPeerEvents: function () {
      this.peer.on('open', (id) => {
        this.logMessage('My peer ID is: ' + id);
      });
      this.peer.on('error', (error) => {
        console.error(error);
      });

      // Handle incoming data connection
      this.peer.on('connection', (conn) => {
        this.logMessage('incoming peer connection!');
        console.log('incoming peer connection!', conn);
        conn.on('data', (data) => {
          this.logMessage(`received: ${data}`);
        });
        conn.on('open', () => {
          conn.send('hello!');
        });
        conn.on('close', () => {
          this.logMessage('Connection closed.');
        });
        conn.on('error', (error) => {
          console.error('Error:', error);
          this.logMessage('Error'+error);
        });
      });

      // Handle incoming voice/video connection
      this.peer.on('call', (call) => {
        console.log('INCOMING CALL', call);
        call.answer(window.stream); // Answer the call with an A/V stream.
        this.renderVideo(window.stream, '#localVideo');
        call.on('stream', this.renderVideo);
      });
    },
    gotDevices: function gotDevices(deviceInfos) {
      const selectors = [document.querySelector('select#audioSource'), document.querySelector('select#audioOutput'), document.querySelector('select#videoSource')];
      // Handles being called several times to update labels. Preserve values.
      const values = selectors.map(select => select.value);
      selectors.forEach(select => {
        while (select.firstChild) {
          select.removeChild(select.firstChild);
        }
      });
      for (let i = 0; i !== deviceInfos.length; ++i) {
        const deviceInfo = deviceInfos[i];
        const option = document.createElement('option');
        option.value = deviceInfo.deviceId;
        if (deviceInfo.kind === 'audioinput') {
          option.text = deviceInfo.label || `microphone ${document.querySelector('select#audioSource').length + 1}`;
          document.querySelector('select#audioSource').appendChild(option);
        } else if (deviceInfo.kind === 'audiooutput') {
          option.text = deviceInfo.label || `speaker ${document.querySelector('select#audioOutput').length + 1}`;
          document.querySelector('select#audioOutput').appendChild(option);
        } else if (deviceInfo.kind === 'videoinput') {
          option.text = deviceInfo.label || `camera ${document.querySelector('select#videoSource').length + 1}`;
          document.querySelector('select#videoSource').appendChild(option);
        } else {
          console.log('Some other kind of source/device: ', deviceInfo);
        }
      }
      selectors.forEach((select, selectorIndex) => {
        if (Array.prototype.slice.call(select.childNodes).some(n => n.value === values[selectorIndex])) {
          select.value = values[selectorIndex];
        }
      });
    },
    // Attach audio output device to video element using device/sink ID.
    attachSinkId :function attachSinkId(element, sinkId) {
      if (typeof element.sinkId !== 'undefined') {
        element.setSinkId(sinkId)
            .then(() => {
              console.log(`Success, audio output device attached: ${sinkId}`);
            })
            .catch(error => {
              let errorMessage = error;
              if (error.name === 'SecurityError') {
                errorMessage = `You need to use HTTPS for selecting audio output device: ${error}`;
              }
              console.error(errorMessage);
              // Jump back to first output device in the list as it's the default.
              document.querySelector('select#audioOutput').selectedIndex = 0;
            });
      } else {
        console.warn('Browser does not support output device selection.');
      }
    },
    changeAudioDestination: function changeAudioDestination() {
      const audioDestination = document.querySelector('select#audioOutput').value;
      this.attachSinkId(document.querySelector('#localVideo'), audioDestination);
    },
    gotStream: function gotStream(stream) {
      this.stream = stream; // make stream available to console
      document.querySelector('#localVideo').srcObject = stream;
      // Refresh button list in case labels have become available
      return navigator.mediaDevices.enumerateDevices();
    },
    handleError: function handleError(error) {
      console.log('navigator.MediaDevices.getUserMedia error: ', error.message, error.name);
    },
    start: function start() {
      if (this.stream) {
        this.stream.getTracks().forEach(track => {
          track.stop();
        });
      }
      const audioSource = document.querySelector('select#audioSource').value;
      const videoSource = document.querySelector('select#videoSource').value;
      const constraints = {
        audio: {deviceId: audioSource ? {exact: audioSource} : undefined},
        video: {deviceId: videoSource ? {exact: videoSource} : undefined}
      };
      navigator.mediaDevices.getUserMedia(constraints).then(this.gotStream).then(this.gotDevices).catch(this.handleError);
    },
  },
  mounted() {
    console.log('VUE is alive!');
    navigator.mediaDevices.enumerateDevices().then(this.gotDevices).catch(this.handleError);
    this.start();
    document.querySelector('select#audioOutput').disabled = !('sinkId' in HTMLMediaElement.prototype);
  }
});