import { act, fireEvent, render, screen } from "@testing-library/react";
import { renderToString } from "react-dom/server";
import { MOBILE_QUERY } from "@/lib/device";
import { getFeaturedProjects } from "@/lib/portfolio-data";
import { ProjectMedia } from "./ProjectMedia";
import { ShowcaseProvider } from "./ShowcaseProvider";

let reducedMotion = false;
jest.mock("@/app/hooks/useReducedMotion", () => ({
  useReducedMotion: () => reducedMotion,
}));
jest.mock("./ProjectLightbox", () => ({
  ProjectLightbox: () => <div role="dialog" aria-label="ampliado" />,
}));

const projects = getFeaturedProjects(null);
const nutriscan = projects.find((project) => project.id === "nutriscan");
if (!nutriscan) throw new Error("projeto ausente");

type Callback = IntersectionObserverCallback;
const callbacks: Callback[] = [];
const Original = global.IntersectionObserver;
const originalMatchMedia = window.matchMedia;

function mockPhone() {
  window.matchMedia = jest.fn().mockImplementation((query: string) => ({
    matches: query === MOBILE_QUERY,
    media: query,
    addEventListener() {},
    removeEventListener() {},
  }));
}

beforeEach(() => {
  jest.useFakeTimers();
  reducedMotion = false;
  callbacks.length = 0;
  global.IntersectionObserver = class {
    constructor(callback: Callback) {
      callbacks.push(callback);
    }
    observe() {}
    unobserve() {}
    disconnect() {}
    takeRecords() {
      return [];
    }
  } as unknown as typeof IntersectionObserver;
  jest.spyOn(HTMLMediaElement.prototype, "play").mockResolvedValue();
  jest.spyOn(HTMLMediaElement.prototype, "pause").mockImplementation(() => {});
  jest.spyOn(HTMLMediaElement.prototype, "load").mockImplementation(() => {});
});

afterEach(() => {
  jest.useRealTimers();
  jest.restoreAllMocks();
  global.IntersectionObserver = Original;
  window.matchMedia = originalMatchMedia;
  Object.defineProperty(navigator, "connection", {
    configurable: true,
    value: undefined,
  });
});

function renderCard() {
  const view = render(
    <ShowcaseProvider projects={projects}>
      <article className="ds-card">
        <ProjectMedia project={nutriscan as NonNullable<typeof nutriscan>} />
      </article>
    </ShowcaseProvider>,
  );
  const frame = view.container.querySelector(".ds-frame") as HTMLElement;
  frame.getBoundingClientRect = () =>
    ({
      top: 300,
      height: 300,
      bottom: 600,
      left: 0,
      right: 400,
      width: 400,
      x: 0,
      y: 300,
    }) as DOMRect;
  return { ...view, frame };
}

function show(frame: HTMLElement) {
  act(() => {
    for (const callback of callbacks)
      callback(
        [
          {
            target: frame,
            intersectionRatio: 1,
            isIntersecting: true,
          } as unknown as IntersectionObserverEntry,
        ],
        {} as IntersectionObserver,
      );
    jest.advanceTimersByTime(40);
  });
}

describe("ProjectMedia", () => {
  it("frames the video with the project's address and a button that enlarges it", () => {
    renderCard();

    expect(screen.getByText("nutriscan.evandro.dev.br")).toBeInTheDocument();
    const expand = screen.getByRole("button", {
      name: "Ampliar o vídeo de NutriScan",
    });
    expect(expand).toHaveAttribute("aria-haspopup", "dialog");
    fireEvent.click(expand);
    expect(
      screen.getByRole("dialog", { name: "ampliado" }),
    ).toBeInTheDocument();
  });

  it("plays only while the card is the active one", () => {
    const { frame, container } = renderCard();
    const video = container.querySelector("video") as HTMLVideoElement;
    expect(container.querySelector(".ds-frame")).toHaveAttribute(
      "data-active",
      "false",
    );
    expect(video.querySelectorAll("source")).toHaveLength(0);

    show(frame);
    expect(container.querySelector(".ds-frame")).toHaveAttribute(
      "data-active",
      "true",
    );
    expect(video.querySelectorAll("source")).toHaveLength(2);
  });

  it("lets the visitor pause the videos that play on their own, and resume them", () => {
    const { frame, container } = renderCard();
    show(frame);
    expect(container.querySelector(".ds-frame")).toHaveAttribute(
      "data-active",
      "true",
    );

    fireEvent.click(
      screen.getByRole("button", { name: "Pausar os vídeos dos projetos" }),
    );
    act(() => {
      jest.advanceTimersByTime(40);
    });
    expect(container.querySelector(".ds-frame")).toHaveAttribute(
      "data-active",
      "false",
    );

    fireEvent.click(
      screen.getByRole("button", { name: "Retomar os vídeos dos projetos" }),
    );
    act(() => {
      jest.advanceTimersByTime(40);
    });
    expect(container.querySelector(".ds-frame")).toHaveAttribute(
      "data-active",
      "true",
    );
  });

  it("has no pause button when nothing plays on its own (reduced motion)", () => {
    reducedMotion = true;
    renderCard();
    expect(
      screen.queryByRole("button", { name: /vídeos dos projetos/ }),
    ).toBeNull();
  });

  it("sends no media at all in the server HTML: the device is only known in the browser", () => {
    const html = renderToString(
      <ShowcaseProvider projects={projects}>
        <ProjectMedia project={nutriscan as NonNullable<typeof nutriscan>} />
      </ShowcaseProvider>,
    );
    expect(html).toContain("ds-frame-screen");
    expect(html).not.toContain("<video");
    expect(html).not.toContain("/videos/");
  });

  it("asks for the poster only once the cover is within about a screen of the window", () => {
    const { frame, container } = renderCard();
    const screenElement = container.querySelector(
      ".ds-frame-screen",
    ) as HTMLElement;
    const video = container.querySelector("video") as HTMLVideoElement;
    expect(screenElement.style.backgroundImage).toBe("");
    expect(video).not.toHaveAttribute("poster");
    expect(video).toHaveAttribute("preload", "metadata");

    show(frame);
    expect(screenElement.style.backgroundImage).toContain(
      "/videos/nutriscan/desktop.webp",
    );
    expect(video).toHaveAttribute("poster", "/videos/nutriscan/desktop.webp");
  });

  it("uses the phone version of the poster and the video below 768 px", () => {
    mockPhone();
    const { frame, container } = renderCard();
    show(frame);

    const screenElement = container.querySelector(
      ".ds-frame-screen",
    ) as HTMLElement;
    expect(screenElement.style.backgroundImage).toContain(
      "/videos/nutriscan/mobile.webp",
    );
    const sources = [...container.querySelectorAll("video source")].map(
      (source) => source.getAttribute("src"),
    );
    expect(sources).toEqual([
      "/videos/nutriscan/mobile.webm",
      "/videos/nutriscan/mobile.mp4",
    ]);
  });

  it("keeps the poster and never attaches a video when the data saver is on", () => {
    Object.defineProperty(navigator, "connection", {
      configurable: true,
      value: { saveData: true },
    });
    const { frame, container } = renderCard();
    show(frame);

    expect(container.querySelector("video")).toBeNull();
    expect(container.querySelector("source")).toBeNull();
    expect(
      screen.getByRole("img", { name: "Captura de tela de NutriScan" }),
    ).toBeInTheDocument();
  });

  it("renders nothing for a project without a recorded video", () => {
    const { container } = render(
      <ShowcaseProvider projects={projects}>
        <ProjectMedia project={{ id: "twins-lab", title: "Twins Lab" }} />
      </ShowcaseProvider>,
    );
    expect(container.querySelector(".ds-frame")).toBeNull();
  });

  it("does nothing, without crashing, when used outside the provider", () => {
    const { container } = render(
      <ProjectMedia project={nutriscan as NonNullable<typeof nutriscan>} />,
    );
    fireEvent.click(
      screen.getByRole("button", { name: "Ampliar o vídeo de NutriScan" }),
    );
    expect(container.querySelector(".ds-frame")).not.toBeNull();
  });
});