# KLL engineering 13.11.2013
# FROM: http://picamera.readthedocs.org/en/latest/index.html
# test RPICAM python lib in Python 2.7 as system
# sudo apt-get install python-pip
# sudo pip install picamera
# more info:
# http://kll.engineering-news.org/kllfusion01/articles.php?article_id=56
# http://creativecommons.org/licenses/by-sa/3.0/

import time
import picamera
from datetime import datetime, timedelta

def wait():
    # Calculate the delay to the start of the next hour
    next_hour = (datetime.now() + timedelta(hour=1)).replace(
        minute=0, second=0, microsecond=0)
    delay = (next_hour - datetime.now()).seconds
    time.sleep(delay)


PICPATH = '/var/run/shm/'       # temp fs ramdisk 
PICNAME = 'RPICAM'
PICTYP  = '.jpg'
PICCOUNT = 5
TIMWAIT1 = 2                    # b4 first picture
TIMWAITS = 10                   # for pic sequence

try:
    with picamera.PiCamera() as camera:
#        camera.resolution = (2592, 1944)   # 5MB
#        camera.resolution = (1280, 720)
        camera.resolution = (640, 480)
        camera.start_preview()
#        camera.exposure_compensation = 2
#        camera.exposure_mode = 'spotlight'
#        camera.meter_mode = 'matrix'
#        camera.image_effect = 'gpen'
#                                           Give the camera some time to adjust to conditions
        print('wait ' + str(TIMWAIT1) + ' sec ')
        time.sleep(TIMWAIT1)
#        wait()
        camera.exif_tags['IFD0.Artist'] = 'RPI'
        camera.exif_tags['IFD0.Copyright'] = 'Copyright (c) 2013 KLL (CC BY-SA 3.0)'
#        print('Capture one image ')
#        camera.capture(PICPATH + PICNAME + PICTYP)
#        print('Capture sequence of ' +str(PICCOUNT) + ' pictures with ' + str(TIMWAIT2) + ' sec delay')
#        for i, filename in enumerate(camera.capture_continuous(PICPATH + PICNAME + '{counter:02d}' + PICTYP)):
#           print('Captured image %s' % filename)
#           if i == PICCOUNT -1:       # for ==2 i get 01,02,03 ???
#            break
#        time.sleep(TIMWAITS)

        for filename in camera.capture_continuous(PICPATH + PICNAME + '{timestamp:%Y-%m-%d-%H-%M}' + PICTYP):
            print('Captured %s' % filename)
#            wait()
            time.sleep(TIMWAITS)
        camera.stop_preview()
        camera.close()
#
except KeyboardInterrupt:
  # User quit by [CTRL] [C]
  print "\nGoodbye!"