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

Same pattern as orbit-menu/config.py and horizon-dock/config.py. Deliberately
separate from settings.py's Settings class: that one persists quad enable/
feature toggles and favorites (module-scoped, read via ctx.feature()), while
this is a single whole-window flag read once at startup.

"layouts" narrows/customises the workspace-layout picker in the taskbar panel
(ui/taskbar.py) on top of what hypr/layouts auto-discovers and writes to
~/.cache/astro-menu/layouts.json:
  "enabled":   list of layout names to offer, in that order (tab order follows
               it) — omit/null to show everything hypr/layouts discovered.
  "overrides": {layout_name: {partial layout spec}} shallow-merged onto the
               discovered spec for that layout — e.g. trim "dirs" to fewer
               directions, or set "fit_method"/"stepper" to false to hide
               those controls for that layout, without touching its .lua file.
Example:
  "layouts": {
    "enabled": ["scrolling", "master", "monocle"],
    "overrides": {"scrolling": {"dirs": ["down", "right"]}}
  }
"""

from __future__ import annotations

import json

from paths import CONFIG_FILE, ensure_dirs

_DEFAULTS = {"hologram": True, "layouts": {"enabled": None, "overrides": {}}}


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 hologram_enabled() -> bool:
    return bool(_load().get("hologram", True))


def apply_layout_config(layouts: list[dict]) -> list[dict]:
    """Filter/reorder/override the layouts hypr/layouts discovered, per the
    "layouts" config key. `layouts` is the parsed layouts.json (or its
    hardcoded fallback) — see Taskbar._load_layouts."""
    cfg = _load().get("layouts") or {}
    enabled = cfg.get("enabled")
    overrides = cfg.get("overrides") or {}

    by_name = {ly["name"]: ly for ly in layouts}
    names = enabled if enabled else [ly["name"] for ly in layouts]

    out = []
    for name in names:
        ly = by_name.get(name)
        if ly is None:
            continue   # config names a layout hypr/layouts never discovered
        out.append({**ly, **overrides.get(name, {})})
    return out