/* A migrated in-memory database with the shipped dictionary loaded — the
   same band files, through the same loader, as the app. */

import { vi } from "vitest";
import { readFileSync } from "node:fs";
import { SqliteWasmDb } from "@app/db/sqlite-wasm-core.js";
import { migrate } from "@app/db/migrate.js";
import type { Db } from "@app/db/types.js";

const DICT = new URL("../../app/public/dict/", import.meta.url);

/** Serve app/public/dict/ to the loader's fetch. Undo with vi.unstubAllGlobals(). */
export function serveDictionary(): void {
  vi.stubGlobal("fetch", async (input: string) => {
    const name = String(input).split("/dict/")[1] ?? "";
    return new Response(readFileSync(new URL(name, DICT)));
  });
}

export async function dictionaryDb(upToBand = 1): Promise<Db> {
  serveDictionary();
  const db = await SqliteWasmDb.open({ memory: true });
  await migrate(db);
  const { ensureBands } = await import("@app/domain/dictionary.js");
  await ensureBands(db, upToBand);
  return db;
}