"""Tiny user-editable config file: ~/.local/state/beacon/config.json.

Read once at startup (main.py, via server.py); a change takes effect on the
next beacon-start.sh restart, not live. Same pattern as orbit-menu/horizon-
dock/astro-menu/station-bar's config.py.
"""

from __future__ import annotations

import json

from paths import CONFIG_FILE, ensure_dirs

_DEFAULTS = {
    "history_enabled": True,
    "history_length": 100,
    "history_persist": True,
}


def _load() -> dict:
    try:
        data = json.loads(CONFIG_FILE.read_text())
    except (FileNotFoundError, json.JSONDecodeError):
        data = {}
    merged = {**_DEFAULTS, **data}
    if not CONFIG_FILE.exists():
        ensure_dirs()
        CONFIG_FILE.write_text(json.dumps(merged, indent=2) + "\n")
    return merged


def history_enabled() -> bool:
    return bool(_load().get("history_enabled", True))


def history_length() -> int:
    try:
        return int(_load().get("history_length", 100))
    except (TypeError, ValueError):
        return 100


def history_persist() -> bool:
    return bool(_load().get("history_persist", True))