/**
 * @file Sessions.urlState.test.tsx
 * @description The Sessions list keeps its filters in the URL: one filter
 * change is one load at page 0, "Waiting" asks the server (`awaiting`) instead
 * of downloading every active session, and a stale response never overwrites
 * a newer one.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { describe, it, expect, vi, beforeEach } from "vitest";
import { render, screen, fireEvent, waitFor, act } from "@testing-library/react";
import { MemoryRouter, useLocation, useNavigate } from "react-router-dom";
import { api } from "../../lib/api";
import { Sessions } from "../Sessions";
import type { Session } from "../../lib/types";

function GoPlain() {
  const nav = useNavigate();
  return <button onClick={() => nav("/sessions")}>go-plain</button>;
}

function Where() {
  const loc = useLocation();
  return <span data-testid="where">{loc.search}</span>;
}

const page = (sessions: Partial<Session>[], total = sessions.length) => ({
  sessions: sessions as Session[],
  total,
  limit: 10,
  offset: 0,
});

beforeEach(() => {
  vi.restoreAllMocks();
  vi.spyOn(api.sessions, "facets").mockResolvedValue({ cwds: [] } as never);
  vi.spyOn(api.remoteSources, "list").mockResolvedValue({ sources: [] } as never);
  vi.spyOn(api.run, "list").mockResolvedValue({ items: [] });
});

describe("Sessions URL state", () => {
  it("one filter click = one load at page 0; Waiting asks the server", async () => {
    const list = vi.spyOn(api.sessions, "list").mockResolvedValue(page([]));
    render(
      <MemoryRouter initialEntries={["/sessions?page=3"]}>
        <Sessions />
        <Where />
      </MemoryRouter>
    );
    await waitFor(() => expect(list).toHaveBeenCalled());
    expect(list.mock.calls[list.mock.calls.length - 1]![0]).toMatchObject({ offset: 30 });
    list.mockClear();

    fireEvent.click(screen.getByRole("button", { name: "Waiting" }));
    await waitFor(() => expect(list).toHaveBeenCalledTimes(1));
    expect(list.mock.calls[0]![0]).toMatchObject({
      status: "active",
      awaiting: true,
      offset: 0,
      limit: 10,
    });
    expect(screen.getByTestId("where").textContent).toBe("?status=waiting");
  });

  it("drops a response that arrives after a newer one", async () => {
    let resolveOld!: (v: ReturnType<typeof page>) => void;
    const list = vi
      .spyOn(api.sessions, "list")
      .mockImplementationOnce(() => new Promise((r) => (resolveOld = r)))
      .mockResolvedValue(
        page([
          { id: "new-1", name: "Fresh", status: "completed", started_at: "2026-01-01T00:00:00Z" },
        ])
      );
    render(
      <MemoryRouter initialEntries={["/sessions"]}>
        <Sessions />
      </MemoryRouter>
    );
    await waitFor(() => expect(list).toHaveBeenCalledTimes(1));
    fireEvent.click(screen.getByRole("button", { name: "Completed" }));
    expect(await screen.findByText("Fresh")).toBeInTheDocument();
    await act(async () => {
      resolveOld(
        page([
          { id: "old-1", name: "Stale", status: "completed", started_at: "2026-01-01T00:00:00Z" },
        ])
      );
    });
    expect(screen.queryByText("Stale")).not.toBeInTheDocument();
  });

  it("an outside navigation that clears ?q= clears the box, and the old q is not written back", async () => {
    vi.spyOn(api.sessions, "list").mockResolvedValue(page([]));
    render(
      <MemoryRouter initialEntries={["/sessions?q=abc"]}>
        <Sessions />
        <GoPlain />
        <Where />
      </MemoryRouter>
    );
    expect(screen.getByRole("textbox", { name: /search sessions/i })).toHaveValue("abc");
    fireEvent.click(screen.getByText("go-plain"));
    await waitFor(() =>
      expect(screen.getByRole("textbox", { name: /search sessions/i })).toHaveValue("")
    );
    await act(() => new Promise((r) => setTimeout(r, 400)));
    expect(screen.getByTestId("where").textContent).toBe("");
  });

  it("a page past the end goes back to page 1", async () => {
    vi.spyOn(api.sessions, "list").mockResolvedValue(page([], 5));
    render(
      <MemoryRouter initialEntries={["/sessions?page=7"]}>
        <Sessions />
        <Where />
      </MemoryRouter>
    );
    await waitFor(() => expect(screen.getByTestId("where").textContent).toBe(""));
  });
});