"""
lib.Commands
~~~~~~~~~~~~~~
Some prepare for commands
"""
from json import load, decoder, dump, JSONDecodeError
from os import getenv

from disnake.ext import commands


def read_json(guild: int, _param: str):
    """
    Reads Json file to determite config strings
    :param guild: ID of Guild
    :param _param: Parameter in json file
    :return: value of parameter.
    """
    parameter = None
    with open(getenv('CONF_FILE'), encoding='utf-8') as f:  # Open the JSON
        try:
            _json = load(f)  # Load the custom prefixes
        except decoder.JSONDecodeError:
            _json = {}
    if guild:  # If the guild exists
        try:
            guild_conf = _json[f"{guild}"]
            try:
                parameter = guild_conf[f"{_param}"]
            except KeyError:
                pass
        except KeyError:
            pass
    return parameter


async def write_json(guild: int, param_name: str, param: str or int):
    print(type(param))
    with open(getenv('CONF_FILE'), encoding='utf-8') as f:
        try:
            _json = load(f)
        except decoder.JSONDecodeError:
            _json = {}
    try:
        _guild = _json[f'{guild}']
    except KeyError:
        _json.update({f'{guild}': {}})
    _guild = _json[f'{guild}']
    _guild.update({f'{param_name}': param})
    _json.update({f'{guild}': _guild})
    with open(getenv('CONF_FILE'), 'w', encoding='utf-8') as f:
        dump(_json, f, indent=4)


def determine_prefix(bot: commands.Bot, msg):
    """
    Determite per-server bot prefix
    :param bot: Disnake Bot object
    :param msg: Disnake msg object
    :return: prefix for server, default is $
    """
    parameter = '$'
    with open(getenv('CONF_FILE'), encoding='utf-8') as f:  # Open the JSON
        try:
            _json = load(f)  # Load the custom prefixes
        except JSONDecodeError:
            _json = {}
    try:
        parameter = _json[f"{msg.guild.id}"]["prefix"]  # Read prefix from json if is setted up

    except KeyError:
        pass
    return parameter