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"""Helper methods for various tests."""
import subprocess

kubectl = ["kubectl", "-n", "oisp"]


def _run_in(cmd, deployment=None, pod=None, container=None):
    """Run command in kubernetes pod (or in random pod from deployment)."""
    assert deployment is not None or pod is not None
    if pod is None:
        out = subprocess.check_output(kubectl+["get", "pods"]).decode("utf-8")
        pods = [p for p in out.split("\n") if p.startswith(deployment+"-")]
        assert pods, "No pod in deployment {}".format(deployment)
        pod = pods[0].split()[0]
    if isinstance(cmd, str):
        cmd = cmd.split()
    if container:
        exec_ = ["exec", pod, "-c", container, "--"]
    else:
        exec_ = ["exec", pod, "--"]
    return subprocess.check_output(kubectl + exec_ + cmd,
                                   stderr=subprocess.DEVNULL)


def clear_db():
    """Reset OISP database to default.

    This clears all tables, but keeps system users.
    """
    _run_in(cmd="node /app/admin resetKeycloakUsers",
            deployment="frontend", container="frontend")
    _run_in(cmd="node /app/admin resetDB",
            deployment="frontend", container="frontend")


def add_user(username, password, role):
    """Add a new user.

    Args:
    ----------
    username: username for new user
    password: password for new user
    role: user role, see OISP documentation for details.
    """
    cmd = ["node", "/app/admin", "addUser", username, password]
    _run_in(cmd=cmd, deployment="frontend", container="frontend")
