import { afterEach, expect, test } from "bun:test";
import grabMariaDBClient from "./grab-mariadb-client";
import setMariaDBClient from "./set-mariadb-client";

// Clients connect lazily, so none of these open a connection
const config = { db_name: "bmt_client_cache", ssl_reject_unauthorized: false };

const originalConfig = global.CONFIG;

afterEach(async () => {
    await global.MARIADB_CLIENT?.close();
    global.CONFIG = originalConfig;
});

test("reuses the client for the same config", () => {
    expect(grabMariaDBClient({ config })).toBe(grabMariaDBClient({ config: { ...config } }));
});

test("a closed client is dropped from the cache and the global slot", async () => {
    setMariaDBClient({ config });
    const first = global.MARIADB_CLIENT!;

    await first.close();
    expect(global.MARIADB_CLIENT).toBeUndefined();

    const second = grabMariaDBClient({ config });
    expect(second).toBeDefined();
    expect(second).not.toBe(first);
});

test("the global client is not reused for a different config", () => {
    setMariaDBClient({ config });
    global.CONFIG = { db_name: "bmt_other" };

    const other = grabMariaDBClient({ config: global.CONFIG });
    expect(other).not.toBe(global.MARIADB_CLIENT);
    other?.close();
});