from typing import Any, Union
from ujson import JSONDecodeError as JSONDecodeError
from ujson import loads, dumps

from sys import exit
from os import kill, sep
from os import name as osname
from traceback import print_exc

from modules.logging import logWrite

def jsonLoad(filename):
    """Loads arg1 as json and returns its contents"""
    with open(filename, "r", encoding='utf8') as file:
        try:
            output = loads(file.read())
        except JSONDecodeError:
            logWrite(f"Could not load json file {filename}: file seems to be incorrect!\n{print_exc()}")
            raise
        except FileNotFoundError:
            logWrite(f"Could not load json file {filename}: file does not seem to exist!\n{print_exc()}")
            raise
    return output

def jsonSave(contents, filename):
    """Dumps dict/list arg1 to file arg2"""
    try:
        with open(filename, "w", encoding='utf8') as file:
            file.write(dumps(contents, ensure_ascii=False, indent=4))
    except Exception as exp:
        logWrite(f"Could not save json file {filename}: {exp}\n{print_exc()}")
    return


def nested_set(dic, keys, value, create_missing=True):
    d = dic
    for key in keys[:-1]:
        if key in d:
            d = d[key]
        elif create_missing:
            d = d.setdefault(key, {})
        else:
            return dic
    if keys[-1] in d or create_missing:
        d[keys[-1]] = value
    return dic

def configSet(keys: list, value: Any, file: str = "config", create_missing=True):
    """Set config's value to provided one

    Args:
        * keys (list): List of keys from the highest one to target
        * value (Any): Needed value
        * file (str, optional): File (if not config). Defaults to "config".
        * create_missing (bool, optional): Create missing items on the way. Defaults to True.
    """    
    if file == "config":
        filepath = ""
        this_dict = jsonLoad(f"{filepath}{file}.json")
        if this_dict["debug"] is True:
            try:
                this_dict = jsonLoad("config_debug.json")
                file = "config_debug"
            except FileNotFoundError:
                print("Debug mode is set but config_debug.json is not there! Falling back to config.json", flush=True)
    else:
        filepath = f"data{sep}users{sep}"
        this_dict = jsonLoad(f"{filepath}{file}.json")
        
    this_dict = nested_set(this_dict, keys, value, create_missing=create_missing)
    jsonSave(this_dict, f"{filepath}{file}.json")
    return

def configGet(key: str, *args: str, file: str = "config"):
    """Get value of the config key
    Args:
        * key (str): The last key of the keys path.
        * *args (str): Path to key like: dict[args][key].
        * file (str): User ID to load. Loads config if not provided. Defaults to "config".
    Returns:
        * any: Value of provided key
    """    
    if file == "config":
        try:
            this_dict = jsonLoad("config.json")
        except FileNotFoundError:
            print("Config file not found! Copy config_example.json to config.json, configure it and rerun the bot!", flush=True)
            exit()
        if this_dict["debug"] is True:
            try:
                this_dict = jsonLoad("config_debug.json")
            except FileNotFoundError:
                print("Debug mode is set but config_debug.json is not there! Falling back to config.json", flush=True)
    else:
        this_dict = jsonLoad(f"data{sep}users{sep}{file}.json")
    this_key = this_dict
    for dict_key in args:
        this_key = this_key[dict_key]
    return this_key[key]

def locale(key: str, *args: str, locale=configGet("locale")) -> Union[str, list, dict]:
    """Get value of locale string
    Args:
        * key (str): The last key of the locale's keys path.
        * *args (list): Path to key like: dict[args][key].
        * locale (str): Locale to looked up in. Defaults to config's locale value.
    Returns:
        * any: Value of provided locale key
    """ 
    if (locale == None):
        locale = configGet("locale")
    
    try:
        this_dict = jsonLoad(f'{configGet("locale", "locations")}{sep}{locale}.json')
    except FileNotFoundError:
        try:
            this_dict = jsonLoad(f'{configGet("locale", "locations")}{sep}{configGet("locale")}.json')
        except FileNotFoundError:
            return f'⚠️ Locale in config is invalid: could not get "{key}" in {str(args)} from locale "{locale}"'

    this_key = this_dict
    for dict_key in args:
        this_key = this_key[dict_key]
        
    try:
        return this_key[key]
    except KeyError:
        return f'⚠️ Locale in config is invalid: could not get "{key}" in {str(args)} from locale "{locale}"'

try:
    from psutil import Process
except ModuleNotFoundError:
    # print(locale("deps_missing", "console", locale=configGet("locale")), flush=True)
    print("Missing dependencies! Please install all needed dependencies and run the bot again!")
    exit()

def killProc(pid):
    if osname == "posix":
        from signal import SIGKILL # type: ignore
        kill(pid, SIGKILL)
    else:
        p = Process(pid)
        p.kill()