from os import path, getenv, mkdir
import sys
from platform import system
from pathlib import Path
from typing import Optional

def resource_path(relative_path: str) -> str:
    """
    Get absolute path to resource, works for dev and for PyInstaller bundle.

    PyInstaller stores bundled files in _MEIPASS folder.
    """
    try:
        base_path: Path = Path(sys._MEIPASS)  # PyInstaller temp folder
    except AttributeError:
        base_path: Path = Path(__file__).parent.parent.parent  # Dev environment: source/ folder

    return path.join(base_path, relative_path)

def get_current_dir() -> str:
    return str(Path.cwd())
def get_data_dir() -> str:
    return resource_path("data")

def get_lang_path() -> str:
    return path.join(get_data_dir(), "lang")

def get_asset_path(asset: str) -> str:
    return path.join(get_data_dir(), "assets", f"{asset}.png")

def get_asset_svg_path(asset: str) -> str:
    return path.join(get_data_dir(), "assets", f"{asset}.svg")

def get_user_data_dir(app_name: str) -> str:
    home: Path = Path.home()
    os: str = system()

    if os == "Windows":
        appdata: Optional[str] = getenv('APPDATA')
        if appdata:
            user_data_path: str = path.join(Path(appdata), app_name)
        else:
            user_data_path: str = path.join(home, "AppData", "Roaming", app_name)
    elif os == "Darwin":
        user_data_path: str = path.join(home, "Library", "Application Support", app_name)
    else:
        user_data_path: str = path.join(home, ".local", "share", app_name)

    if not path.exists(user_data_path):
        mkdir(user_data_path)
    return user_data_path

def get_user_temp_icons(app_name: str) -> str:
    user_data_path = get_user_data_dir(app_name)
    return path.join(user_data_path, "temp", "icons")

def get_user_temp(app_name: str) -> str:
    user_data_path = get_user_data_dir(app_name)
    return path.join(user_data_path, "temp")