const users = {}

module.exports = io => {
  io.on('connection', async socket => {
    console.log(`A socket connection to the server has been made: ${socket.id}`)
    users[socket.id] = { socketId: socket.id, nick: socket.id }

    // announce to all
    socket.broadcast.emit('user connected', users[socket.id])
    // send all users TODO remove
    socket.emit(
      'got users',
      Object.keys(io.sockets.sockets).map(socketId => users[socketId])
    )

    socket.on('message', message => {
      if (!message) {
        console.log('Weird. Received empty message.')
        return
      }
      console.log('sending message to ', message.to, message)
      io.to(message.to).emit('message', message)
    })

    socket.on('join', room => {
      console.log(`${socket.id} joins ${room}`)
      socket.join(room, () => {
        sendNamespace(room)
        io.to(room).emit('user joined', { room, socketId: socket.id })
        io.of(room).clients((error, clients) => {
          if (error) throw error
          socket.emit('got client list', clients)
        })
      })
    })
    socket.on('get all clients', () => {
      io.clients((e, c) => {
        if (e) console.log(e)
        console.log('all clients:', c)
      })
    })
    socket.on('part', room => {
      console.log('part', socket.id, room)
      socket.leave(room, () => {
        console.log(Object.keys(io.sockets.adapter.rooms))
        if (io.sockets.adapter.rooms[room]) {
          Object.keys(io.sockets.adapter.rooms[room]['sockets']).map(s => {
            sendNamespace(room, s)
            return s
          })
        } else {
          console.log(`room ${room} disappeared`)
        }
        io.to(room).emit('user left', { room, socketId: socket.id })
      })
    })

    socket.on('change nick', nick => {
      console.log(`${users[socket.id]['nick']} changed nick to ${nick}`)
      socket.broadcast.emit('changed nick', { socketId: socket.id, nick: nick })
      users[socket.id]['nick'] = nick
    })

    const sendNamespace = (room, socketId) => {
      if (io.sockets.adapter.rooms[room]) {
        const namespace = {
          namespace: room,
          sockets: Object.keys(io.sockets.adapter.rooms[room]['sockets']),
        }
        if (socketId) {
          socket.emit('got namespace', namespace)
        } else {
          io.emit('got namespace', namespace)
        }
      }
    }

    socket.on('disconnect', async () => {
      console.log(`${socket.id} has disconnected.`)
      io.emit('user disconnected', socket.id)
      // OPTIMIZE if there's an easy way to inform rooms the socket was part of
      // they should be informed here
      //socket.rooms.map(r => r.sockets.map(s => sendNamespace(r, s)))
    })
  })
}