import io
import picamera
import cv2
import numpy
import RPi.GPIO as GPIO
import time
import json
import os
from pushbullet.pushbullet import PushBullet
from time import sleep
from gpiozero import MotionSensor

#api keys to be able to send notification
apiKey = "o.6ifPy8pW6FaIu97LMGMJhzovspI8JYSQ"

p = PushBullet(apiKey)

devices = p.getDevices()



GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(22, GPIO.IN, GPIO.PUD_UP)

#Create a memory stream so photos doesn't need to be saved in a file
stream = io.BytesIO()
#Declaration for Pir sensor
pir = MotionSensor(22)
#for infinite loop of the program
var = 1

while var == 1:
    with picamera.PiCamera() as camera:
        #Motion sensor
        input_state = GPIO.input(22)
        if input_state == True:

            time.sleep(2)
            print ('Motion Detected')
            pir.wait_for_motion()
            #start to capture images
            camera.start_preview()
            camera.resolution = (320, 240)
            sleep(1)
            camera.capture(stream, format='jpeg')

#Convert the picture into a numpy array
            buff = numpy.fromstring(stream.getvalue(), dtype=numpy.uint8)

#Now creates an OpenCV image
            image = cv2.imdecode(buff, 1)

#Load a cascade file for detecting faces
            face_cascade = cv2.CascadeClassifier('/usr/share/opencv/haarcascades/haarcascade_frontalface_alt.xml')

#Convert to grayscale
            gray = cv2.cvtColor(image,cv2.COLOR_BGR2GRAY)

#Look for faces in the image using the loaded cascade file
            faces = face_cascade.detectMultiScale(gray, 1.1, 5)
            print "Found "+str(len(faces))+" face(s)"

    #Draw a rectangle around every found face
            for (x,y,w,h) in faces:
                cv2.rectangle(image,(x,y),(x+w,y+h),(255,0,0),2)

    #Save the result image
                cv2.imwrite('result.jpg',image)


            #send notification if face detected
                a = str(len(faces))
                if a in ['1','2','3','4','5']:


                    p.pushNote(devices[0]["iden"], 'Intruders alert', 'Someone intrudes! Please wait for the captured image!')
                    p.pushFile(devices[0]["iden"], "result.jpg", "Intruder's Image", open("/home/pi/Programs/result.jpg", "rb"))