// Shared local-dev state written by tools/lchat-dev-up.mjs and read back by it
// (to reuse the same admin token / db / port across restarts) and by
// tools/lchat-dev-bot.mjs (to auto-discover the running server's base URL +
// admin token, so you don't have to copy them by hand).
//
// The file lives at the repo root as `.lchat-dev.json` and is gitignored — it
// holds the instance's admin token, so treat it like the secret it is (it's
// written 0600 and never committed). The SQLite db it points at lives next to
// it as `.lchat-dev.db` (+ `-wal`/`-shm`) and is covered by the repo's `*.db`
// ignore rules.
import fs from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

const REPO_ROOT = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");

export const CONFIG_PATH = path.join(REPO_ROOT, ".lchat-dev.json");
export const DEFAULT_DB_PATH = path.join(REPO_ROOT, ".lchat-dev.db");

// Where tools/lchat-dev-bot.mjs keeps the dev bot's identity (its keypair +
// device token) so it survives restarts like the server does. It's tied to the
// db above — a fresh instance invalidates it — so lchat-dev-up clears it on any
// fresh start, and lchat-dev-bot --clean drops it to re-provision.
export const BOT_SESSION_PATH = path.join(REPO_ROOT, ".lchat-dev-bot.json");

// Where the dev hooks sidecar (lchat hooks run, spawned by lchat-dev-up)
// persists its service-identity session. Tied to the db exactly like the bot
// session: a fresh instance invalidates it, so lchat-dev-up clears it on any
// fresh start and re-mints the service invite.
export const HOOKS_SESSION_PATH = path.join(REPO_ROOT, ".lchat-dev-hooks.json");

// The three files SQLite writes for one WAL-mode database, so callers can clean
// them all in one sweep.
export function dbFiles(dbPath) {
  return [dbPath, `${dbPath}-wal`, `${dbPath}-shm`];
}

// Returns the parsed config, or null if it's missing/unreadable.
export function readConfig() {
  try {
    return JSON.parse(fs.readFileSync(CONFIG_PATH, "utf8"));
  } catch {
    return null;
  }
}

export function writeConfig(cfg) {
  fs.writeFileSync(CONFIG_PATH, JSON.stringify(cfg, null, 2) + "\n", { mode: 0o600 });
}

export function clearConfig() {
  fs.rmSync(CONFIG_PATH, { force: true });
}

export function clearBotSession() {
  fs.rmSync(BOT_SESSION_PATH, { force: true });
}

export function clearHooksSession() {
  fs.rmSync(HOOKS_SESSION_PATH, { force: true });
}