export default defineEventHandler(async (event) => {
  const { userId } = await readBody(event)
  const teamId: string = event.context.params ? event.context.params.id : '@current'

  if (teamId === '@current') {
    throw createError({ statusCode: 400, statusMessage: 'Cannot join your own team' })
  }

  const user = await getUser(userId, event)

  if (user.team) {
    throw createError({ statusCode: 400, statusMessage: 'User already is in a team' })
  }

  const team = await TeamModel.findById(teamId).populate('members')

  if (!team) {
    throw createError({ statusCode: 500, statusMessage: 'Team does not exist' })
  }

  team.members.push(userId)
  user.team = team._id

  team.save()

  return team
})