import { join } from 'node:path';
import { mkdirSync } from 'node:fs';
import { DATA_PATH } from '@@/data-path';

/**
 * Where the session's state lives, and why none of it is in the plugin's own directory.
 *
 * A plugin directory is a git checkout that `plugins:update` will `git pull` over and `plugins:delete` will
 * remove. The wine prefix is ~600 MB of generated state that takes minutes to rebuild — putting it there
 * would mean an update fights the working tree and a reinstall costs a fresh download of the VB6 runtime.
 *
 * So it goes under `DATA_PATH/minesweeper/`, the same convention music's cache uses. The game executable
 * DOES ship in the repository: it is 68 KB, it is the thing being run rather than state produced by running
 * it, and its checksum is in the README.
 */
export const STATE_DIR = join(DATA_PATH, 'minesweeper');

/** The wine prefix — a `win32` one, because the game is an i386 PE. Generated; never committed. */
export const WINEPREFIX = join(STATE_DIR, 'prefix');

/**
 * Runtime scratch: pid files, logs, and the VNC socket.
 *
 * Created mode 0700 and that is load-bearing rather than tidy — it is the ONLY thing standing between
 * another local account and an unauthenticated VNC display. x11vnc runs with `-nopw`, which is correct
 * precisely because this directory refuses everyone but the owner. See `vnc.ts`.
 */
export const RUN_DIR = join(STATE_DIR, 'run');

/** x11vnc's listening socket. A path, not a port: unreachable without traversing RUN_DIR. */
export const VNC_SOCKET = join(RUN_DIR, 'vnc.sock');

/** Ships with the plugin. `import.meta.dir` is `<plugin>/sidecar`. */
export const GAME_EXE = join(import.meta.dir, '..', 'game', 'Minesweeper X.exe');

export function ensureDirs(): void {
  mkdirSync(STATE_DIR, { recursive: true, mode: 0o700 });
  mkdirSync(RUN_DIR, { recursive: true, mode: 0o700 });
}