import boto3
import time
import subprocess #to change file permission
from botocore.exceptions import ClientError
student_id = "student-id-231231"

try:
    ec2 = boto3.client('ec2')
    response = ec2.create_key_pair(KeyName=student_id+"-key")
    pemfile = open(student_id+"-key.pem", "w")
    pemfile.write(response['KeyMaterial'])
    pemfile.close()
    subprocess.call(['chmod', '0400', student_id+"-key.pem"])


    ec2i = boto3.resource('ec2', region_name="ap-southeast-2")
    #create instance 1
    instance1 = ec2i.create_instances(
            ImageId='ami-d38a4ab1',
            MinCount=1,
            MaxCount=1,
            KeyName=student_id+"-key",
            InstanceType="t2.micro"
        )
    id1=instance1[0].id
    print id1
    #create instance 2
    instance2 = ec2i.create_instances(
            ImageId='ami-d38a4ab1',
            MinCount=1,
            MaxCount=1,
            KeyName=student_id+"-key",
            InstanceType="t2.micro"
        )
    id2=instance2[0].id
    print id2



    client = boto3.client('elbv2')
    #create load balancer
    #use your student id here

    response = client.create_load_balancer(
            Name='Load-balancer-123',
            Subnets=['subnet-00cee76c9e3367183','subnet-02d93083aec47cb01'],
            SecurityGroups=['sg-09769fcf4b6ded830'],
            Scheme='internet-facing',

        )
    loadarn = response['LoadBalancers'][0]['LoadBalancerArn']
    #create target group
    response = client.create_target_group(
        Name='my-target-group-5',
        Protocol='HTTP',
        Port=80,
        VpcId='vpc-050bd4e7c7677cc76',
        TargetType='instance'
    )
    arn =  response['TargetGroups'][0]['TargetGroupArn']
    print arn# for the target group
    time.sleep(18)#wait for instances to get initiated
    #register targets with target group
    response = client.register_targets(
        TargetGroupArn=arn,
        Targets=[
            {
                'Id': id1,
                'Port': 80
            },
            {
                'Id': id2,
                'Port': 80
            },
        ]
    )
    #create listener with given config
    response = client.create_listener(
        LoadBalancerArn=loadarn,
        Protocol='HTTP',
        Port=80,
        DefaultActions=[
            {
                'Type': 'forward',
                'TargetGroupArn': arn,

            },
        ]
    )
    print("Done")
except ClientError as e:
    print(e)