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import os
import shlex
import subprocess

RALLY_HOME = os.getenv("RALLY_HOME", os.path.expanduser("~"))
RALLY_CONFIG_DIR = os.path.join(RALLY_HOME, ".rally")
TRACK_REPO_PATH = os.path.join(RALLY_CONFIG_DIR, "benchmarks", "tracks", "rally-tracks-compat")
REMOTE_TRACK_REPO = "https://github.com/elastic/rally-tracks"


def pytest_addoption(parser):
    group = parser.getgroup("rally")
    group.addoption(
        "--track-repository",
        action="store",
        default=TRACK_REPO_PATH,
        help=f"Path to a local track repository\n(default: {TRACK_REPO_PATH})",
    )
    group.addoption(
        "--track-revision",
        action="store",
        default="master",
        help="Track repository revision to test\ndefault: `master`",
    )
    group.addoption(
        "--track-repository-test-directory",
        action="store",
        dest="track_repo_test_dir",
        default="it",
        help="Name of the directory containing the track repo's integration tests\n(default: `it`)",
    )
    group.addoption("--operator", action="store_true", help="run as operator (used in serverless testing)")


def pytest_cmdline_main(config):
    repo = config.option.track_repository
    if not os.path.isdir(repo):
        # we're using the defaults, so perform an initial clone of rally-tracks
        if repo == TRACK_REPO_PATH:
            try:
                subprocess.run(shlex.split(f"git clone {REMOTE_TRACK_REPO} {repo}"), text=True, capture_output=True, check=True)
            except subprocess.CalledProcessError as e:
                raise AssertionError(f"Unable to clone {REMOTE_TRACK_REPO} into {repo}: {e.stderr}")
        # user has provided a non-default track repository, but it's not a valid path, so we raise an error
        else:
            raise AssertionError(f"Track repository not found: [{repo}]")

    test_dir = config.option.track_repo_test_dir
    config.args.append(os.path.join(repo, test_dir))


def pytest_report_header(config):
    header = f"rally: track-repository={config.option.track_repository}, track-revision={config.option.track_revision},"
    header += f" track-repository-test-directory={config.option.track_repo_test_dir}"
    return header