"""
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the Software
 * without restriction, including without limitation the rights to use, copy, modify,
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"""

from __future__ import print_function

import base64
import boto3
import os
from jsonschema import validate
import json
from ast import literal_eval

print('Loading function')
s3 = boto3.client('s3')
bucket_name = os.environ['BUCKET_VALIDATION_DEFS']
file_name = os.environ['BUCKET_VALIDATION_FILE']

def get_validation_schema():
    f = open('payload_validation.json',)
    return json.load(f)

def handler(event, context):

    output = []
    # fetch the json payload schema to validate the data against
    schema = get_validation_schema()
    print('Schema {}'.format(schema))
    for record in event['records']:
        payload = base64.b64decode(record['data'])
        # print(payload)
        payload1 = payload.decode("utf-8")
        # print(payload1)
        jsonData = json.loads(payload1)
        # validate it
        try:
            validate(instance=jsonData, schema=schema)
            print("Record valid {}".format(jsonData))
            output_record = {
                'recordId': record['recordId'],
                'result': 'Ok',
                'data': record['data']
            }
        except Exception as e:
            print("Record invalid {}".format(jsonData))
            print(e)
            # record is not valid format and will be stored in the 'processingfailed' prefix in S3 bucket
            output_record = {
                'recordId': record['recordId'],
                'result': 'ProcessingFailed',
                'data': record['data']
            }
        output.append(output_record)

    print('Successfully processed {} records.'.format(len(event['records'])))

    return {'records': output}