# -------------------------------------------------------------------------
#   Copyright (c) 2015-2017 AT&T Intellectual Property
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.
#
# -------------------------------------------------------------------------
#

import json

import yaml


def load_config_file(config_file: str, child_name="dockerConfiguration") -> dict:
    """
    Load OSDF configuration from a file -- currently only yaml/json are supported
    :param config_file:  path to config file (.yaml or .json).
    :param child_name: if present, return only that child node
    :return: config (all or specific child node)
    """
    with open(config_file, 'r') as fid:
        res = {}
        if config_file.endswith(".yaml"):
            res = yaml.load(fid)
        elif config_file.endswith(".json") or config_file.endswith("json"):
            res = json.load(fid)
    return res.get(child_name, res) if child_name else res


def dcae_config(config_file: str) -> dict:
    return load_config_file(config_file, child_name="dockerConfiguration")


def all_configs(**kwargs: dict) -> dict:
    """
    Load all specified configurations
    :param config_file_spec: key-value pairs
           (e.g. { "core": "common_config.yaml", "deployment": "/tmp/1452523532json" })
    :return: merged config as a nested dictionary
    """
    return {k: load_config_file(fname) for k, fname in kwargs.items()}