#!/usr/bin/python3
from email.mime.text import MIMEText
import logging
from smtplib import SMTP_SSL
import sys
import time

import RPi.GPIO as GPIO

# These should probably be protected... 
RELAY_EMAIL = 'dsorber.phalanx@gmail.com'
RELAY_PASSWD = "You'reNotMySupervisor"
TO_EMAIL = 'baranovich@gmail.com'

LOG_FORMAT_STR = '%(asctime)s|%(levelname)s|%(filename)s:%(lineno)s|%(message)s'
LOG_DATE_FORMAT_STR = '%a %b %d %H:%M:%S %Y'
DEFAULT_LOG_LEVEL = logging.DEBUG

#
# Automated Watering System Daemon
#

def send_email(subject, msg_text): 
    """ Simple helper function to send an email
    """
    msg = MIMEText(msg_text, 'plain')
    msg['Subject'] = subject
    msg['To'] = TO_EMAIL
    try:
        conn = SMTP_SSL('smtp.gmail.com')
        conn.set_debuglevel(True)
        conn.login(RELAY_EMAIL, RELAY_PASSWD)
        try:
            conn.sendmail(RELAY_EMAIL, TO_EMAIL, msg.as_string())
        finally:
            conn.close()
    except Exception as exp:
        error = '{:s}: {!r}'.format(type(exp).__name__, exp.args)
        logging.error(error)

def main():
    # Configure logging before attempting anything serious
    logging.basicConfig(format=LOG_FORMAT_STR, 
                        datefmt=LOG_DATE_FORMAT_STR, 
                        level=DEFAULT_LOG_LEVEL)
    
    logging.info('automated water system deamon started')
    
    # Configure GPIO
    GPIO.setmode(GPIO.BCM)
    GPIO.setup(17, GPIO.OUT)
    
    try:
        # Turn on pump
        GPIO.output(17, True)
        logging.debug('pump on')
        
        # Wait for a while -- 1.5 hours
        time.sleep(5400)
        
    finally:
        # Turn off pump
        GPIO.output(17, False)
        logging.debug('pump off')
    
    send_email('Automated Watering System Report', 'watering completed')
    logging.info('notification sent')
    
    logging.info('automated water system deamon stopping')
    
    
if __name__ == '__main__':
    sys.exit(main())