# Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# This file is licensed under the Apache License, Version 2.0 (the "License").
# You may not use this file except in compliance with the License. A copy of the
# License is located at
#
# http://aws.amazon.com/apache2.0/
#
# This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
# OF ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.
import boto3

def parents(label_parents):
    return list(map(lambda lp: lp['Name'],  label_parents)) 


def cars(photo_name):

    # Change bucket and photo to your S3 Bucket and image.
    bucket='parking-pictures'
    photo=photo_name

    client=boto3.client('rekognition')

    response = client.detect_labels(Image={'S3Object':{'Bucket':bucket,'Name':photo}},
        MaxLabels=10)

    number_of_cars = sum(len(label['Instances']) for label in response['Labels'] if label['Name'] == 'Car')
    
    instances = [] 
    
    for label in response['Labels']:
        if label['Name'] != 'Car':
            continue
            instances.append(label['Instances'])

    return (number_of_cars, instances)