#!/usr/bin/env python
"""Script to upload benchmark results to an s3 location."""
import os
import argparse
from datetime import datetime
from subprocess import check_call


REPO_ROOT = os.path.dirname(
    os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
WORKDIR = os.environ.get('PERF_WORKDIR', os.path.join(REPO_ROOT, 'workdir'))
DEFAULT_BUCKET = os.environ.get('PERF_RESULTS_BUCKET')
DATE_FORMAT = "%Y-%m-%d-%H-%M-%S-"


def main(args):
    source = get_latest_results_directory(args.directory)
    run_id = source.split(os.sep)[-1]
    destination = '%s/%s' % (args.bucket, run_id)
    check_call(
        'aws s3 cp --recursive %s %s' % (source, destination),
        shell=True)


def s3_uri(value):
    if not value.startswith('s3://'):
        return 's3://' + value
    return value


def get_latest_results_directory(parent):
    # Check to see if the given directory is a valid directory
    if _is_result_dir_format(os.path.split(parent)[-1]):
        return parent

    # Find the latest valid subdirectory
    for d in sorted(os.listdir(parent), reverse=True):
        directory = os.path.join(parent, d)
        if os.path.isdir(directory) and _is_result_dir_format(d):
            return directory

    raise ValueError("No valid result directories found in %s" % parent)


def _is_result_dir_format(directory):
    try:
        datetime.strptime(directory[:20], DATE_FORMAT)
        int(directory[20:])
        return True
    except Exception:
        return False


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument(
        '-d', '--directory', default=os.path.join(WORKDIR, 'results'),
        help='A directory containing multiple test runs or a single test '
             'run directory. If this is a directory with multiple test runs, '
             'the latest will be uploaded.')
    parser.add_argument(
        '-b', '--bucket', default=DEFAULT_BUCKET, type=s3_uri,
        required=DEFAULT_BUCKET is None,
        help='An s3uri to upload the results to. This can also be set with '
             'the environment variable PERF_RESULTS_BUCKET. If the '
             'environment variable is not set, then this argument is '
             'required.')
    main(parser.parse_args())