import boto3
import botocore.exceptions as exceptions

def get_all_available_regions():
    """Retrieve a list of all AWS regions."""
    ec2_client = boto3.client("ec2")
    regions = [
        region["RegionName"] for region in ec2_client.describe_regions()["Regions"]
    ]

    available_regions = []
    for region in regions:
        try:
            ec2_client = boto3.client("ec2", region_name=region)
            ec2_client.describe_vpcs()
        except exceptions.ClientError as e:
            if e.response["Error"]["Code"] == "UnauthorizedOperation":
                continue
        available_regions.append(region)
    return available_regions


def have_terraform_tags(tags):
    for tag in tags:
        if tag["Key"] == "terraformed" and tag["Value"] == "true":
            return True
    return False