import { describe, it, expect, afterEach, vi } from "vitest";
import { render, screen, cleanup, waitFor } from "@testing-library/react";

import DashboardPage from "@/app/dashboard/page";

export const pushMock = vi.fn();

vi.mock("next/navigation", () => {
  return {
    __esModule: true,
    useRouter: () => ({ push: pushMock }),
  };
});

afterEach(() => {
  cleanup();
  vi.unstubAllGlobals();
  vi.clearAllMocks();
});

describe("DashboardPage - GNB와 테마", () => {
  it("GNB에서 현재 페이지인 '대시보드' 탭에 aria-current=\"page\"가 설정되어야 한다", async () => {
    const overview = {
      summaryStats: {
        totalProjects: 0,
        totalSubmissions: 0,
        todaySubmissions: 0,
        last7DaysSubmissions: 0,
      },
      projectStats: [],
      dailySubmissions: [],
    };

    const fetchMock = vi.fn().mockResolvedValue(
      new Response(JSON.stringify(overview), {
        status: 200,
        headers: { "Content-Type": "application/json" },
      }),
    );

    vi.stubGlobal("fetch", fetchMock);

    render(<DashboardPage />);

    const dashboardLink = await screen.findByRole("link", { name: "대시보드" });
    const projectsLink = await screen.findByRole("link", { name: "프로젝트 목록" });
    const submissionsLink = await screen.findByRole("link", { name: "전체 제출 내역" });

    expect(dashboardLink.getAttribute("href")).toBe("/dashboard");
    expect(dashboardLink.getAttribute("aria-current")).toBe("page");

    expect(projectsLink.getAttribute("aria-current")).toBeNull();
    expect(submissionsLink.getAttribute("aria-current")).toBeNull();
  });

  it("헤더에 테마 전환 버튼이 있고 클릭 시 html 요소의 dark 클래스가 토글되어야 한다", async () => {
    const overview = {
      summaryStats: {
        totalProjects: 0,
        totalSubmissions: 0,
        todaySubmissions: 0,
        last7DaysSubmissions: 0,
      },
      projectStats: [],
      dailySubmissions: [],
    };

    const fetchMock = vi.fn().mockResolvedValue(
      new Response(JSON.stringify(overview), {
        status: 200,
        headers: { "Content-Type": "application/json" },
      }),
    );

    vi.stubGlobal("fetch", fetchMock);

    render(<DashboardPage />);

    const html = document.documentElement;
    html.classList.remove("dark");

    const themeToggleButton = await screen.findByRole("button", { name: "테마 전환" });

    expect(html.classList.contains("dark")).toBe(false);

    themeToggleButton.click();

    expect(html.classList.contains("dark")).toBe(true);

    themeToggleButton.click();

    expect(html.classList.contains("dark")).toBe(false);
  });
});