// server/db/client.ts
import Database from "better-sqlite3";
import { drizzle } from "drizzle-orm/better-sqlite3";
import { mkdirSync, existsSync, rmSync, renameSync } from "node:fs";
import { dirname } from "node:path";
import { env } from "../env.js";
import * as schema from "./schema.js";

mkdirSync(dirname(env.dbPath), { recursive: true });

// Restauration en attente : un fichier `<db>.incoming` déposé par /system/db/restore
// est appliqué au démarrage (swap hors-ligne = aucune corruption d'une base ouverte).
const incoming = `${env.dbPath}.incoming`;
if (existsSync(incoming)) {
  for (const ext of ["", "-wal", "-shm"]) {
    const p = `${env.dbPath}${ext}`;
    if (existsSync(p)) rmSync(p, { force: true });
  }
  renameSync(incoming, env.dbPath);
}

const sqlite = new Database(env.dbPath);
sqlite.pragma("journal_mode = WAL");
sqlite.pragma("foreign_keys = ON");

export const db = drizzle(sqlite, { schema });
export { schema, sqlite };