#!/usr/bin/env python
import os
import pyinotify
from pyinotify import ProcessEvent

SYS_VIDEO_OUTPUTS='/sys/class/drm/card0/'
SYS_VIDEO_OUTPUTS='/sys/class/drm/'

DEFAULT_PROFILE='default'
AUTORANDR_CMD='autorandr --change --default %s' % DEFAULT_PROFILE

class VideoOutputMonitor(ProcessEvent):

    def process_IN_ACCESS(self, event):
        if event.name == 'status':
            print 'Change status of %s' % os.path.basename(event.path)
            os.system(AUTORANDR_CMD)


def register_video_cards(manager):
    if not os.path.exists(SYS_VIDEO_OUTPUTS):
        return

    for directory in os.listdir(SYS_VIDEO_OUTPUTS):
        path = os.path.join(SYS_VIDEO_OUTPUTS, directory)
        status = os.path.join(path, 'status')
        if os.path.exists(status):
            print 'Monitoring %s' % path
            manager.add_watch(path, pyinotify.ALL_EVENTS)

# pyinotify.log.setLevel(10)

manager = pyinotify.WatchManager()
handler = VideoOutputMonitor()
notifier = pyinotify.Notifier(manager, default_proc_fun=handler)

register_video_cards(manager)

notifier.loop()