import boto3
from aws_xray_sdk.core import patch_all
from aws_xray_sdk.core import xray_recorder
import os
import sys
import uuid
from urllib.parse import unquote_plus
from PIL import Image
import PIL.Image

# Example Lambda function code to list all s3 buckets and apply x-ray tracing
s3_client = boto3.client('s3')

def resize_image(image_path, resized_path):
  with Image.open(image_path) as image:
      image.thumbnail(tuple(x / 2 for x in image.size))
      image.save(resized_path)

def lambda_handler(event, context):
    patch_all()
    for record in event['Records']:
        bucket = record['s3']['bucket']['name']
        key = unquote_plus(record['s3']['object']['key'])
        tmpkey = key.replace('/', '')
        download_path = '/tmp/{}{}'.format(uuid.uuid4(), tmpkey)
        upload_path = '/tmp/resized-{}'.format(tmpkey)
        s3_client.download_file(bucket, key, download_path)
        resize_image(download_path, upload_path)
        s3_client.upload_file(upload_path, '{}-resized'.format(bucket), key)