# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

from __future__ import absolute_import, unicode_literals

import os
import subprocess
import sys
import yaml


HERE = os.path.abspath(os.path.dirname(__file__))
ROOT = os.path.normpath(os.path.join(HERE, "..", ".."))


def decrypt_sops_files():
    """Decrypt all files with encrypted keys in the repo.

    All files found in the list under the "files" key of the
    `.sops.yaml` file will have all secrets with an
    "_encrypted" suffix decrypted.
    """
    with open(os.path.join(ROOT, ".sops.yaml")) as f:
        files = yaml.safe_load(f).get("files")

    if not files:
        return

    for path in files:
        subprocess.check_call(
            [
                "sops",
                "--in-place",
                "--decrypt",
                path,
            ],
            cwd=ROOT,
        )


def hg_executable():
    if "VIRTUAL_ENV" in os.environ:
        venv = os.environ["VIRTUAL_ENV"]
    # Virtualenv activated by Python itself, not from shell.
    elif hasattr(sys, "real_prefix"):
        venv = sys.prefix
    else:
        venv = os.path.join(ROOT, "venv")

    if os.name == "nt":
        return os.path.join(venv, "Scripts", "hg.exe")
    else:
        return os.path.join(venv, "bin", "hg")


def get_and_write_vct_node():
    if not os.path.exists(os.path.join(ROOT, ".hg")):
        raise Exception(
            "version-control-tools directory must be a Mercurial checkout"
        )

    env = dict(os.environ)
    env["HGRCPATH"] = "/dev/null"
    args = [hg_executable(), "-R", ROOT, "log", "-r", ".", "-T", "{node|short}"]
    with open(os.devnull, "wb") as null:
        node = subprocess.check_output(args, env=env, cwd="/", stderr=null)

    with open(os.path.join(ROOT, ".vctnode"), "wb") as fh:
        fh.write(node)

    return node