/**
 * @file BackupSettings.test.tsx
 * @description Settings → Data → Backup: a save sends only the fields that
 * changed, "Back up now" is off until a folder is saved, and the newest backup
 * in the folder is shown.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { render, screen, waitFor } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { beforeEach, describe, expect, it, vi } from "vitest";
import i18n from "i18next";

const { backup } = vi.hoisted(() => ({
  backup: { get: vi.fn(), save: vi.fn(), run: vi.fn() },
}));
vi.mock("../../../lib/api", () => ({ api: { settings: { backup } } }));

import { BackupSettings } from "../BackupSettings";

const off = {
  dir: "",
  hour: 2,
  keep: 7,
  running: false,
  last: null,
  files: [],
  dir_error: null,
  env_owned: { dir: false, hour: false, keep: false },
};

beforeEach(() => {
  i18n.changeLanguage("en");
  vi.clearAllMocks();
});

describe("BackupSettings", () => {
  it("saves only the folder when only the folder changed, then allows a run", async () => {
    const user = userEvent.setup();
    backup.get.mockResolvedValue(off);
    backup.save.mockImplementation((p) => Promise.resolve({ ok: true, ...off, ...p }));
    render(<BackupSettings />);
    const run = await screen.findByRole("button", { name: /Back up now/ });
    expect(run).toBeDisabled();
    expect(screen.getByText("Backups are off.")).toBeInTheDocument();

    await user.type(screen.getByLabelText("Backup folder"), "/mnt/hdd/b");
    await user.click(screen.getByRole("button", { name: "Save" }));
    await waitFor(() => expect(backup.save).toHaveBeenCalledWith({ dir: "/mnt/hdd/b" }));
    await waitFor(() => expect(run).toBeEnabled());
  });

  it("shows the newest backup", async () => {
    backup.get.mockResolvedValue({
      ...off,
      dir: "/mnt/hdd/b",
      files: [
        { name: "agenthub-20261008-020000.db", size: 2048, mtime: "2026-10-08T02:00:30Z" },
        { name: "agenthub-20261007-020000.db", size: 1024, mtime: "2026-10-07T02:00:30Z" },
      ],
    });
    render(<BackupSettings />);
    expect(await screen.findByText(/2\.0 KB · 2 kept, 3\.0 KB in all/)).toBeInTheDocument();
  });
});