import boto3
import logging
import os
import json
import time

# reference: https://aws.amazon.com/premiumsupport/knowledge-center/start-stop-lambda-eventbridge/

ec2 = boto3.client('ec2', region_name=os.environ['region_name'])

def lambda_handler(event, context):

    ec2.start_instances(InstanceIds=json.loads(os.environ['instances']))
    time.sleep(5)
    print("Instance state after lambda execution:")

	ec2Array = []
	response = ec2.describe_instances(InstanceIds=json.loads(os.environ['instances']))
	for r in response['Reservations']:
    	for i in r['Instances']:
        	for t in i['Tags']:
            	if t['Key'] == 'Name':
                	ec2Array.append({'id': i['InstanceId'], 'name': t['Value'], 'state': i['State']['Name']})
        
	print(json.dumps(ec2Array))
    return ec2Array