import boto3
import os

client = boto3.client('dynamodb')
needle = os.environ.get('ANALYTICS_METADATA_TABLE', 'qa_analytics_metadata')


def aws_configured(start=None):
    tables = get_tables(start)
    haystack = tables['TableNames']
    found = needle in haystack
    if found:
        return found
    return aws_configured(tables['LastEvaluatedTableName'])


def get_tables(start):
    if start is None:
        return client.list_tables()
    else:
        return client.list_tables(ExclusiveStartTableName=start)


try:
    ready = aws_configured()
    if not ready:
        raise Exception('not ready for {}'.format(needle))
except Exception as e:
    print('you need to configure your aws creds as per the README')
    exit(-1)
# while true; do nc -lk  8126 > nc.txt; done