# coding: utf-8

import select
import os
import glob

def filename_and_path(filepath):
  fullpath = os.path.abspath(filepath)
  print("fullpath = ",fullpath)
  filename = os.path.basename(fullpath)
  return [os.path.basename(fullpath),os.path.dirname(fullpath)]

def checkFile(filename,dirpath):
  # 指定されたディレクトリのファイル一覧を取得する
  files=os.listdir(dirpath)
  for item in files:
   if os.path.basename(item) == filename:
     return True
  return False

def watchDir(filename,dirpath):
  # 指定されたディレクトリを監視
  print("dirpath =",dirpath)
  f = os.open(dirpath,os.O_RDONLY)
  kq = select.kqueue()
  ke = select.kevent(f, filter=select.KQ_FILTER_VNODE,
                   flags=select.KQ_EV_ADD | select.KQ_EV_ENABLE | select.KQ_EV_CLEAR,
                   fflags=select.KQ_NOTE_DELETE | select.KQ_NOTE_WRITE)
  events = kq.control([ke], 0, None)
  floop=True
  while floop:
    r_events = kq.control([ke], 1, None)
    for event in r_events:
     print (event)
     if event.fflags & select.KQ_NOTE_WRITE:
       print ("dir was updated!")
       # 対象のファイルが追加されたか確認
       if checkFile(filename,dirpath):
         floop=False

  kq.close()
  os.close(f)
  print(dirpath+"/"+filename)
  watchFile(dirpath+"/"+filename)

def watchFile(filepath):

  f = os.open("foo",os.O_RDONLY)
  kq = select.kqueue()
  ke = select.kevent(f, filter=select.KQ_FILTER_VNODE,
                   flags=select.KQ_EV_ADD | select.KQ_EV_ENABLE | select.KQ_EV_CLEAR,
                   fflags=select.KQ_NOTE_DELETE | select.KQ_NOTE_WRITE)
  events = kq.control([ke], 0, None)
  floop=True
  while floop:
    r_events = kq.control([ke], 1, None)
    for event in r_events:
     print (event)
     if event.fflags & select.KQ_NOTE_DELETE:
       print( "file was deleted!")
       floop=False
     elif event.fflags & select.KQ_NOTE_WRITE:
       print ("file was updated!")

  kq.close()
  os.close(f)
  print("aaa")

  # ディレクトリ監視に切り替え
  filename,dirpath = filename_and_path(filepath)
  watchDir(filename, dirpath)

watchFile("foo")