import { test, expect, type Browser, type Page } from "@playwright/test";
import {
  clickVisibleChannelLink,
  expectContentType,
  gotoPage,
  openApp,
  openFirstVideo,
  toggleContentType,
} from "./helpers";

// The address is the view: a view set through the UI, its address opened as a bookmark — in a NEW
// browser context, so nothing this tab remembered (its history entries, sessionStorage, the view
// storage it wrote) can stand in for what the address says. One round trip per page, plus the
// overlays the shell opens over any page (the channel page, the player) and the live search.

const STORAGE_STATE = "e2e/.auth/state.json";

/** The page's address, opened as a bookmark in a fresh context of the same account. */
async function bookmarked(browser: Browser, page: Page, prepare?: (p: Page) => Promise<void>) {
  const url = page.url();
  const ctx = await browser.newContext({ storageState: STORAGE_STATE, locale: "en-US" });
  const fresh = await ctx.newPage();
  await prepare?.(fresh);
  await openApp(fresh, url);
  return fresh;
}

const tab = (p: Page, name: string) => p.getByRole("tab", { name, exact: true });

test.describe("a bookmark reopens the view it was taken of", () => {
  test("the feed's filters", async ({ page, browser }) => {
    await openApp(page, "/?page=feed");
    await toggleContentType(page, "includeLive");
    await expect(page).toHaveURL(/[?&]live=/);
    const fresh = await bookmarked(browser, page);
    await expectContentType(fresh, "includeLive", true);
    await fresh.context().close();
  });

  test("Home's time budget", async ({ page, browser }) => {
    await openApp(page, "/?page=home");
    await page.getByRole("button", { name: "An evening", exact: true }).click();
    await expect(page).toHaveURL(/[?&]hb=long/);
    const fresh = await bookmarked(browser, page);
    await expect(fresh.getByRole("button", { name: "An evening", exact: true })).toHaveAttribute(
      "aria-pressed",
      "true",
    );
    await fresh.context().close();
  });

  test("a Settings tab", async ({ page, browser }) => {
    await openApp(page, "/?page=feed");
    await gotoPage(page, "settings");
    await tab(page, "Notifications").click();
    const fresh = await bookmarked(browser, page);
    await expect(tab(fresh, "Notifications")).toHaveAttribute("aria-selected", "true");
    await fresh.context().close();
  });

  test("an admin page's tab", async ({ page, browser }) => {
    await openApp(page, "/?page=feed");
    await page.getByTestId("nav-admin").click();
    await page.getByTestId("nav-admin-users").click();
    await tab(page, "Access requests").click();
    const fresh = await bookmarked(browser, page);
    await expect(tab(fresh, "Access requests")).toHaveAttribute("aria-selected", "true");
    await fresh.context().close();
  });

  test("the Channels manager's tab and name search", async ({ page, browser }) => {
    await openApp(page, "/?page=feed");
    await gotoPage(page, "channels");
    await tab(page, "Hidden").click();
    await page.getByPlaceholder("Search channels…").fill("zz");
    await expect(page).toHaveURL(/zz/); // written once the typing settles
    const fresh = await bookmarked(browser, page);
    await expect(tab(fresh, "Hidden")).toHaveAttribute("aria-selected", "true");
    await expect(fresh.getByPlaceholder("Search channels…")).toHaveValue("zz");
    await fresh.context().close();
  });

  test("the Files search", async ({ page, browser }) => {
    await openApp(page, "/?page=feed");
    await gotoPage(page, "files");
    await page.getByPlaceholder("Search files…").fill("zz");
    await expect(page).toHaveURL(/zz/);
    const fresh = await bookmarked(browser, page);
    await expect(fresh.getByPlaceholder("Search files…")).toHaveValue("zz");
    await fresh.context().close();
  });

  test("a channel page's own tab, over the page it was opened from", async ({ page, browser }) => {
    await openApp(page, "/?page=feed");
    await expect(page.getByTestId("video-card").first()).toBeVisible();
    expect(await clickVisibleChannelLink(page)).toBe(true);
    const title = await page.getByTestId("channel-title").textContent();
    await tab(page, "About").click();
    const fresh = await bookmarked(browser, page);
    await expect(fresh.getByTestId("channel-title")).toHaveText(title ?? "");
    await expect(tab(fresh, "About")).toHaveAttribute("aria-selected", "true");
    await fresh.context().close();
  });

  test("the player and the video it plays", async ({ page, browser }) => {
    await openApp(page, "/?page=feed");
    await openFirstVideo(page);
    await expect(page).toHaveURL(/[?&]watch=/);
    const watch = new URL(page.url()).searchParams.get("watch");
    const fresh = await bookmarked(browser, page);
    await expect(fresh.getByTestId("player-modal")).toBeVisible();
    expect(new URL(fresh.url()).searchParams.get("watch")).toBe(watch);
    await fresh.context().close();
  });

  // The search itself never reaches YouTube here: the answer is the server's shape, served by the
  // test, and the request it answers is what the address named.
  test("a live YouTube search, its term and its count", async ({ page, browser }) => {
    const answer = async (p: Page, seen: string[]) => {
      await p.route("**/api/search/youtube?**", (route) => {
        seen.push(route.request().url());
        return route.fulfill({ json: { items: [], next_cursor: null, source: "scrape" } });
      });
    };
    await answer(page, []);
    await openApp(page, "/?page=feed");
    await page.getByPlaceholder("Search your subscriptions…").fill("lofi");
    await page.getByRole("button", { name: "Search YouTube", exact: true }).click();
    await expect(page.getByText("YouTube results for “lofi”")).toBeVisible();
    await expect(page).toHaveURL(/[?&]yt=lofi/); // named as it opens, not only once the count is set
    await page.getByRole("button", { name: "40", exact: true }).click();
    await expect(page).toHaveURL(/[?&]ytn=40/);

    const seen: string[] = [];
    const fresh = await bookmarked(browser, page, (p) => answer(p, seen));
    await expect(fresh.getByText("YouTube results for “lofi”")).toBeVisible();
    await expect(fresh.getByRole("button", { name: "40", exact: true })).toHaveAttribute(
      "aria-pressed",
      "true",
    );
    await expect.poll(() => seen.length).toBeGreaterThan(0);
    const asked = new URL(seen[0]!).searchParams;
    expect([asked.get("q"), asked.get("limit")]).toEqual(["lofi", "40"]);
    await fresh.context().close();
  });
});