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import os

from esrally import types


def rally_confdir():
    default_home = os.path.expanduser("~")
    return os.path.join(os.getenv("RALLY_HOME", default_home), ".rally")


def rally_root():
    return os.path.dirname(os.path.realpath(__file__))


def races_root(cfg: types.Config):
    return os.path.join(cfg.opts("node", "root.dir"), "races")


def race_root(cfg: types.Config, race_id=None):
    if not race_id:
        race_id = cfg.opts("system", "race.id")
    return os.path.join(races_root(cfg), race_id)


def install_root(cfg: types.Config):
    install_id = cfg.opts("system", "install.id")
    return os.path.join(races_root(cfg), install_id)


def libs():
    return os.path.join(rally_confdir(), "libs")


def logs():
    """
    :return: The absolute path to the directory that contains Rally's log file.
    """
    return os.path.join(rally_confdir(), "logs")