import { expect, test, type Locator } from "@playwright/test";

async function expectHelpBesideHeading(anchor: Locator) {
  const heading = anchor.locator(":scope > :is(h1,h2,h3)");
  const link = anchor.getByRole("link");
  await expect(heading).toBeVisible();
  await expect(link).toBeVisible();
  await expect(heading.locator("a,button,[role=status]")).toHaveCount(0);
  const geometry = await anchor.evaluate(element => {
    const heading = element.querySelector(":scope > :is(h1,h2,h3)")!.getBoundingClientRect();
    const link = element.querySelector("a")!.getBoundingClientRect();
    return { gap: link.left - heading.right, right: link.right, viewport: window.innerWidth };
  });
  expect(geometry.gap).toBeGreaterThanOrEqual(4);
  expect(geometry.gap).toBeLessThanOrEqual(8);
  expect(geometry.right).toBeLessThanOrEqual(geometry.viewport);
}

for (const width of [390, 3085]) {
  for (const language of ["en", "de"]) {
    test(`documentation remains beside headings during loading and long-title wrapping (${width}px, ${language})`, async ({ page }) => {
      await page.setViewportSize({ width, height: 1100 });
      await page.goto(`/?heading-help&language=${language}`);
      const pageTitle = page.locator(".page-title-with-loader");
      await expect(page.getByRole("heading", { level: 1, name: "Dashboard", exact: true })).toBeVisible();
      await expect(pageTitle.getByRole("status")).toBeVisible();
      await expect(pageTitle.getByRole("link")).toHaveAccessibleName(language === "de" ? "Benutzerdokumentation öffnen" : "Open user documentation");
      for (const anchor of await page.locator(".text-with-help:has(> :is(h1,h2,h3))").all()) await expectHelpBesideHeading(anchor);
      const rawLabel = page.getByTestId("raw-text-help");
      const rawGeometry = await rawLabel.evaluate(element => ({ width: element.clientWidth, scrollWidth: element.scrollWidth, right: element.getBoundingClientRect().right, helpRight: element.querySelector("a")!.getBoundingClientRect().right }));
      expect(rawGeometry.scrollWidth).toBeLessThanOrEqual(rawGeometry.width);
      expect(rawGeometry.helpRight).toBeLessThanOrEqual(rawGeometry.right);
      await page.getByRole("button", { name: "Toggle loading", exact: true }).click();
      await expect(pageTitle.getByRole("status")).toHaveCount(0);
      await expectHelpBesideHeading(pageTitle.locator(".text-with-help"));
      await expect(page.locator('[data-page-action-slot="help"]')).toHaveCount(0);
      expect(await page.evaluate(() => document.documentElement.scrollWidth - window.innerWidth)).toBeLessThanOrEqual(1);
    });
  }
}

test("card help stays available when collapsed and opening it does not toggle content", async ({ page, context }) => {
  await context.route("https://govoplan.add-ideas.de/**", route => route.fulfill({ body: "Documentation fixture" }));
  await page.goto("/?heading-help&language=en");
  const card = page.getByTestId("help-card");
  const popupPromise = page.waitForEvent("popup");
  await card.getByRole("link").click();
  const popup = await popupPromise;
  await popup.close();
  await expect(page.getByTestId("help-card-content")).toBeVisible();
  await card.getByRole("button", { name: "Show header only", exact: true }).click();
  await expect(page.getByTestId("help-card-content")).toHaveCount(0);
  await expectHelpBesideHeading(card.locator(".text-with-help"));
  await card.getByRole("button", { name: "Show content", exact: true }).click();
  await expect(page.getByTestId("help-card-content")).toBeVisible();
});

test("dialog help has its own name, remains in keyboard order, and does not dismiss the dialog", async ({ page, context }) => {
  await context.route("https://govoplan.add-ideas.de/**", route => route.fulfill({ body: "Documentation fixture" }));
  await page.setViewportSize({ width: 390, height: 1000 });
  await page.goto("/?heading-help&language=en");
  await page.getByTestId("open-help-dialog").click();
  const dialog = page.getByRole("dialog");
  await expect(dialog).toHaveAccessibleName(/^Dashboard DokumentationsüberschriftOhneLeerzeichen/);
  await expectHelpBesideHeading(dialog.locator(".text-with-help"));
  const help = dialog.getByRole("link");
  await expect(help).toBeFocused();
  await help.press("Shift+Tab");
  await expect(page.getByTestId("dialog-last-action")).toBeFocused();
  await page.getByTestId("dialog-last-action").press("Tab");
  await expect(help).toBeFocused();
  const popupPromise = page.waitForEvent("popup");
  await help.click();
  const popup = await popupPromise;
  await popup.close();
  await expect(dialog).toBeVisible();
  await dialog.getByRole("button", { name: "Close", exact: true }).click();
  await expect(dialog).toHaveCount(0);
  await expect(page.getByTestId("open-help-dialog")).toBeFocused();
});

test("widget documentation stays beside its one existing title in display, configuration, and drag markup", async ({ page }) => {
  await page.goto("/?heading-help&widgets&language=en");
  const title = page.getByRole("heading", { name: "Scheduling requests", exact: true });
  const anchor = page.locator(".card-title-with-help");
  await expect(title).toHaveCount(1);
  await expectHelpBesideHeading(anchor);
  await expect(anchor.getByRole("link")).toHaveAttribute("href", "/docs?type=user&topic=scheduling.find-and-decide-meeting-time");
  await page.getByRole("button", { name: "Toggle configuration", exact: true }).click();
  await expect(title).toHaveCount(1);
  await expectHelpBesideHeading(anchor);
  await expect(page.locator(".card-actions .documentation-help-link")).toHaveCount(0);
  await page.getByRole("button", { name: "Toggle drag preview", exact: true }).click();
  // A drag placeholder retains hidden content only to preserve the widget height.
  const preview = page.locator(".dashboard-widget-placeholder-content");
  await expect(preview.locator("h2")).toHaveCount(1);
  await expect(preview.locator(".card-title-with-help .documentation-help-link")).toHaveAttribute("href", "/docs?type=user&topic=scheduling.find-and-decide-meeting-time");
  await expect(preview).toBeHidden();
  await page.getByRole("button", { name: "Toggle drag preview", exact: true }).click();
  await expect(title).toHaveCount(1);
  await expectHelpBesideHeading(anchor);
});