module SingSession

# File lib/sing_session.rb, line 31
def begin_session(channel, sessions: sessions_store)
  key = channel_key(channel)
  token = (sessions.dig(key, :token) || 0) + 1
  sessions[key] = { stopped: false, token: token }
  sessions[key]
end

# File lib/sing_session.rb, line 19
def channel_key(channel)
  channel.to_s.downcase
end

# File lib/sing_session.rb, line 23
def parse_command(text)
  cleaned = text.to_s.strip
  return nil if cleaned.empty?
  return { action: :stop } if cleaned.casecmp?("stop")

  { action: :sing, query: cleaned }
end

# File lib/sing_session.rb, line 49
def session_stopped?(channel, token, sessions: sessions_store)
  session = sessions[channel_key(channel)]
  !session || session[:stopped] || session[:token] != token
end

# File lib/sing_session.rb, line 15
def sessions_store
  @sessions_store ||= {}
end

# File lib/sing_session.rb, line 38
def stop_session(channel, sessions: sessions_store)
  key = channel_key(channel)
  session = sessions[key]
  unless session && !session[:stopped]
    return { stopped: false, message: NOTHING_PLAYING_MESSAGE }
  end

  session[:stopped] = true
  { stopped: true, message: STOPPED_MESSAGE }
end