"""Small JSON settings file shared by the CLI and the editor (user config folder)."""
import json
import os

from .paths import user_dir

DEFAULTS = {"game_dir": None, "store_root": None, "full_backup": True,
            "input_device": None, "output_device": None, "last_dir": None,
            "background_enabled": True, "background_opacity": 0.1}
OBSOLETE = ("theme", "background_image", "language")   # the editor starts in the game's language


def path():
    return os.path.join(user_dir("config"), "settings.json")


def load():
    s = dict(DEFAULTS)
    try:
        s.update(json.load(open(path(), encoding="utf-8")))
    except (OSError, ValueError):
        pass
    for k in OBSOLETE:
        s.pop(k, None)
    return s


def save(s):
    tmp = path() + ".tmp"
    with open(tmp, "w", encoding="utf-8") as f:
        json.dump(s, f, indent=1)
    os.replace(tmp, path())