class Fusuma::Plugin::Inputs::Input

def self.select(inputs)
  ios = IO.select(inputs.map(&:io))
  io = ios&.first&.first
  input = inputs.find { |i| i.io == io }
  begin
    line = io.readline_nonblock("\n").chomp
  rescue EOFError => e
    warn "#{input.class.name}: #{e}"
    warn 'Send SIGKILL to fusuma processes'
    inputs.reject { |i| i == input }.each do |i|
      warn "stop process: #{i.class.name.underscore}"
      Process.kill(:SIGKILL, i.pid)
    end
    exit 1
  rescue StandardError => e
    warn "#{input.class.name}: #{e}"
    exit 1
  end
  input.create_event(record: line)
end

def create_event(record: 'dummy input')
  e = Events::Event.new(tag: tag, record: record)
  MultiLogger.debug(input_event: e)
  e
end

def io
  raise NotImplementedError, "override #{self.class.name}##{__method__}"
end

def pid
  raise NotImplementedError, "override #{self.class.name}##{__method__}"
end

def tag
  self.class.name.split('Inputs::').last.underscore
end