from pathlib import Path
from typing import Any, Union

import aiofiles
from ujson import dumps, loads


async def json_read(path: Union[str, Path]) -> Any:
    """Read contents of a JSON file

    ### Args:
        * path (`Union[str, Path]`): Path-like object or path as a string

    ### Returns:
        * `Any`: File contents
    """
    async with aiofiles.open(str(path), mode="r", encoding="utf-8") as f:
        data = await f.read()
    return loads(data)


async def json_write(data: Any, path: Union[str, Path]) -> None:
    """Write contents to a JSON file

    ### Args:
        * data (`Any`): Contents to write. Must be a JSON serializable
        * path (`Union[str, Path]`): Path-like object or path as a string of a destination
    """
    async with aiofiles.open(str(path), mode="w", encoding="utf-8") as f:
        await f.write(dumps(data, ensure_ascii=False, escape_forward_slashes=False))


async def config_get(
    key: str, *path: str, config_file: Union[str, Path] = "config.json"
) -> Any:
    """Get a value of the config key by its path provided
    For example, `foo.bar.key` has a path of `"foo", "bar"` and the key `"key"`

    ### Args:
        * key (`str`): Key that contains the value
        * *path (`str`): Path to the key that contains the value
        * config_file (`Union[str, Path]`, *optional*): Path-like object or path as a string of a location of the config file. Defaults to `"config.json"`

    ### Returns:
        * `Any`: Key's value

    ### Example:
    Get the "salary" of "Pete" from this JSON structure:
    ```json
    {
        "users": {
            "Pete": {
                "salary": 10.0
            }
        }
    }
    ```

    This can be easily done with the following code:
    ```python
    import libbot
    salary = await libbot.config_get("salary", "users", "Pete")
    ```
    """
    this_key = await json_read(config_file)
    for dict_key in path:
        this_key = this_key[dict_key]
    return this_key[key]


async def config_set(
    key: str, value: Any, *path: str, config_file: Union[str, Path] = "config.json"
) -> None:
    """Set config's key by its path to the value

    ### Args:
        * key (`str`): Key that leads to the value
        * value (`Any`): Any JSON serializable data
        * *path (`str`): Path to the key of the target
        * config_file (`Union[str, Path]`, *optional*): Path-like object or path as a string of a location of the config file. Defaults to `"config.json"`
    """
    this_dict = await json_read(config_file)
    string = "this_dict"
    for arg in path:
        string += f'["{arg}"]'
    if type(value) in [str]:
        string += f'["{key}"] = "{value}"'
    else:
        string += f'["{key}"] = {value}'
    exec(string)
    await json_write(this_dict, config_file)
    return