#
# This file is distributed under the MIT License. See LICENSE.md for details.
#

import os
import re
from pathlib import Path
from typing import Dict, List, Optional

from xdg import xdg_data_home


def clean_double_dict(dictionary: Dict[str, Dict[str, List]]):
    keys_to_delete = []
    for key in dictionary.keys():
        clean_dict(dictionary[key])
        if not dictionary[key]:
            keys_to_delete.append(key)

    for key in keys_to_delete:
        dictionary.pop(key)


def clean_dict(dictionary: Dict[str, List]):
    keys_to_delete = []
    for key in dictionary.keys():
        if not dictionary[key]:
            keys_to_delete.append(key)

    for key in keys_to_delete:
        dictionary.pop(key)


def clean_step_list(step_list: List):
    for step in step_list:
        clean_container_list(step["containers"])

    for step in step_list[:]:
        if len(step["containers"]) == 0:
            step_list.remove(step)


def clean_container_list(container_list: List):
    for container in container_list[:]:
        if len(container["targets"]) == 0:
            container_list.remove(container)


def project_workdir() -> Optional[Path]:
    data_dir = os.getenv("REVNG_DATA_DIR", "")
    project_id = os.getenv("REVNG_PROJECT_ID", "")

    if data_dir != "" and project_id == "":
        return Path(data_dir)
    elif project_id != "":
        real_data_dir = Path(data_dir) if data_dir != "" else xdg_data_home() / "revng"
        if re.match(r"^[\w_-]$", project_id, re.ASCII):
            return real_data_dir / project_id
        else:
            raise ValueError("Invalid Project ID")
    else:
        return None


def target_dict_to_graphql(target_dict: Dict[str, str]):
    return {"pathComponents": target_dict["path_components"], **target_dict}