/**
 * Phone suite: five-tab bottom bar (labels at 360/390 in EN/CS, dark/light,
 * reduced motion), the library ⋯ sheet, the settings sheet (drag, touch
 * targets, key flow), and an axe-core contrast audit.
 */
import { BASE, DECK, axeSource, launchBrowser, makeChecker, makePage, seed } from "./lib.mjs";

const { check, finish } = makeChecker();
const browser = await launchBrowser();

const box = (locator) => locator.boundingBox();
const dragDown = async (page, locator, dy = 170, steps = 9) => {
  const bounds = await locator.boundingBox();
  await page.mouse.move(bounds.x + bounds.width / 2, bounds.y + bounds.height / 2);
  await page.mouse.down();
  for (let index = 1; index <= steps; index++) {
    await page.mouse.move(bounds.x + bounds.width / 2, bounds.y + bounds.height / 2 + (dy * index) / steps);
    await page.waitForTimeout(18);
  }
  await page.mouse.up();
};

/* 1. empty library: header, tab bar, ⋯ sheet ------------------------- */
{
  const { context, page } = await makePage(browser);
  await seed(page, { decks: [] });
  await page.goto(BASE, { waitUntil: "networkidle" });
  await page.waitForTimeout(1100);

  check("no hamburger on phones", (await page.getByRole("button", { name: "Open menu" }).count()) === 0);
  check("no drawer on phones", (await page.getByRole("complementary", { name: "Menu" }).count()) === 0);
  const themeBtn = page.getByRole("button", { name: "Switch to light mode" });
  check("theme toggle present", await themeBtn.isVisible());
  const themeBox = await box(themeBtn);
  check("theme toggle >= 44px", themeBox.height >= 43.5 && themeBox.width >= 43.5, `${Math.round(themeBox.width)}x${Math.round(themeBox.height)}`);
  check("exactly one theme toggle on phones", (await page.getByRole("button", { name: /Switch to (light|dark) mode/ }).count()) === 1);

  const tabs = page.locator("nav.tabbar");
  check("tab bar visible", await tabs.isVisible());
  const tabTexts = (await tabs.locator("a, button").allInnerTexts()).map((text) => text.trim());
  check(
    "five tabs in order",
    JSON.stringify(tabTexts) === JSON.stringify(["Library", "Progress", "New deck", "Exam", "Settings"]),
    JSON.stringify(tabTexts),
  );
  const tabBoxes = await tabs.locator("a, button").evaluateAll((els) => els.map((el) => el.getBoundingClientRect().height));
  check("every tab >= 44px tall", tabBoxes.every((height) => height >= 43.5), JSON.stringify(tabBoxes.map(Math.round)));

  check("empty state hides the folder pills", (await page.locator(".folder-pill").count()) === 0);
  const moreBtn = page.getByRole("button", { name: "More actions" });
  check("⋯ button replaces the import icon", await moreBtn.isVisible());
  const moreBox = await box(moreBtn);
  check("⋯ >= 44px", moreBox.height >= 43.5 && moreBox.width >= 43.5, `${Math.round(moreBox.width)}x${Math.round(moreBox.height)}`);
  await moreBtn.click();
  await page.waitForTimeout(500);
  const sheet = page.getByRole("dialog", { name: "Library actions" });
  check(
    "⋯ sheet lists Import JSON + New folder",
    (await sheet.isVisible()) && (await sheet.getByText("Import JSON").isVisible()) && (await sheet.getByText("New folder").isVisible()),
  );
  await page.keyboard.press("Escape");
  let sheetClosed = true;
  try {
    await sheet.waitFor({ state: "detached", timeout: 2500 });
  } catch {
    sheetClosed = false;
  }
  check("⋯ sheet closes with Escape", sheetClosed);

  // Empty state checks before any folder exists.
  const cta = page.getByRole("link", { name: "Create study deck", exact: true });
  check("dedicated primary CTA", await cta.isVisible());
  const ctaBox = await box(cta);
  check("CTA >= 44px tall", ctaBox.height >= 43.5, String(Math.round(ctaBox.height)));
  await page.getByRole("link", { name: "Homework", exact: true }).click();
  await page.waitForTimeout(700);
  const hwCta = page.getByRole("link", { name: "New homework", exact: true });
  check("homework quick action", await hwCta.isVisible());
  await page.getByRole("link", { name: "Study Decks", exact: true }).click();
  await page.waitForTimeout(700);

  // Creating a folder from the ⋯ sheet brings the chips row in.
  await page.getByRole("button", { name: "More actions" }).click();
  await page.waitForTimeout(500);
  await page.getByRole("dialog").getByText("New folder").click();
  await page.waitForTimeout(400);
  await page.getByRole("dialog").locator("input").fill("Biology");
  await page.getByRole("dialog").getByRole("button", { name: "Add" }).click();
  await page.waitForTimeout(700);
  check(
    "⋯ sheet creates a folder",
    (await page.evaluate(() => JSON.parse(localStorage.getItem("freezmo.folders.v1")).map((f) => f.name))).includes("Biology"),
  );
  check("folder chips appear once folders exist", (await page.locator(".folder-pill").count()) >= 1);
  await context.close();
}

/* 2. tab-bar matrix: 360/390 × EN/CS × dark/light × reduced motion --- */
for (const locale of ["en", "cs"]) {
  for (const width of [360, 390]) {
    for (const theme of ["dark", "light"]) {
      for (const reducedMotion of ["no-preference", "reduce"]) {
        const label = `${locale}/${width}/${theme}/${reducedMotion === "reduce" ? "reduced" : "motion"}`;
        const { context, page } = await makePage(browser, { width, height: 800, reducedMotion });
        await seed(page, { locale, theme, decks: [] });
        await page.goto(BASE, { waitUntil: "networkidle" });
        await page.waitForTimeout(900);
        const tabs = page.locator("nav.tabbar");
        const visible = await tabs.isVisible();
        const overflowX = await page.evaluate(() => document.documentElement.scrollWidth - window.innerWidth);
        const labels = await tabs.locator("a > span:last-child, button > span:last-child").evaluateAll((els) =>
          els.map((el) => ({ text: el.innerText, clipped: el.scrollWidth > el.clientWidth + 1 })),
        );
        check(`${label}: tab bar visible, no overflow`, visible && overflowX <= 1, String(overflowX));
        check(`${label}: five labels, none clipped`, labels.length === 5 && labels.every((entry) => !entry.clipped), JSON.stringify(labels.map((entry) => entry.text)));
        check(`${label}: active indicator present`, (await tabs.locator('[aria-current="page"]').count()) === 1);
        await context.close();
      }
    }
  }
}

/* 3. Czech settings sheet: touch targets, key flow, drag -------------- */
{
  const { context, page } = await makePage(browser);
  await seed(page, { locale: "cs", decks: [DECK], folders: [{ id: "f1", name: "Škola", createdAt: 1 }] });
  await page.goto(BASE, { waitUntil: "networkidle" });
  await page.waitForTimeout(1100);
  check("cs folder pills are 44px tall", (await box(page.locator(".folder-pill").first())).height >= 43.5);

  await page.locator("nav.tabbar").getByRole("button").click();
  const dialog = page.getByRole("dialog");
  await dialog.waitFor({ timeout: 6000 });
  await page.waitForTimeout(700);
  check("cs sheet title", await dialog.getByRole("heading", { name: "Nastavení" }).isVisible());

  const targets = [
    ["close", dialog.getByRole("button", { name: "Zavřít nastavení" })],
    ["Show", dialog.getByRole("button", { name: "Zobrazit" })],
    ["Re-check", dialog.getByRole("button", { name: "Zkontrolovat připojení" })],
    ["Remove key", dialog.getByRole("button", { name: "Odstranit klíč z prohlížeče" })],
    ["segmented", dialog.locator(".segmented > button").first()],
    ["privacy summary", dialog.locator("summary").first()],
  ];
  for (const [name, locator] of targets) {
    const bounds = await box(locator);
    check(`${name} >= 44px`, bounds.width >= 43.5 && bounds.height >= 43.5, `${Math.round(bounds.width)}x${Math.round(bounds.height)}`);
  }

  check("Save hidden until the key is edited", (await dialog.getByRole("button", { name: "Uložit" }).count()) === 0);
  const keyInput = dialog.locator("#ollama-api-key-phone");
  await keyInput.fill("test-key2");
  await page.waitForTimeout(200);
  const save = dialog.getByRole("button", { name: "Uložit" });
  check("Save appears after editing, >= 44px", (await save.isVisible()) && (await box(save)).height >= 43.5);
  await keyInput.fill("test-key");
  await page.waitForTimeout(200);
  check("Save hides again when unchanged", (await dialog.getByRole("button", { name: "Uložit" }).count()) === 0);

  const tip = dialog.locator("details").first();
  check("privacy note starts collapsed", !(await tip.evaluate((el) => el.open)));
  await tip.locator("summary").click();
  await page.waitForTimeout(250);
  check("privacy expander opens", await tip.evaluate((el) => el.open));
  check("privacy expander mentions .env.local", await tip.getByText(".env.local").isVisible());
  await tip.locator("summary").click();
  await page.waitForTimeout(200);

  // drag while scrolled won't dismiss, at the top it will
  await page.locator(".sheet-scroll").evaluate((el) => (el.scrollTop = 120));
  await page.waitForTimeout(250);
  await dragDown(page, page.locator(".sheet-scroll"));
  await page.waitForTimeout(700);
  check("scrolled: drag snaps back, sheet stays", (await dialog.count()) === 1);
  await page.locator(".sheet-scroll").evaluate((el) => (el.scrollTop = 0));
  await page.waitForTimeout(250);
  await dragDown(page, dialog.locator("#settings-title"));
  await page.waitForTimeout(800);
  check("handle+header swipe closes the sheet", (await dialog.count()) === 0);

  // backdrop tap — at a fixed point near the top: the sheet is max-h-[90dvh],
  // so its top edge can never reach it, while a point measured mid-animation
  // can end up inside the sheet once the spring settles.
  await page.locator("nav.tabbar").getByRole("button").click();
  await dialog.waitFor({ timeout: 6000 });
  await page.waitForTimeout(700);
  await page.mouse.click(195, 12);
  await page.waitForTimeout(800);
  check("backdrop tap closes", (await dialog.count()) === 0);

  // remove-key confirmation
  await page.locator("nav.tabbar").getByRole("button").click();
  await dialog.waitFor({ timeout: 6000 });
  await dialog.getByRole("button", { name: "Odstranit klíč z prohlížeče" }).click();
  await page.waitForTimeout(300);
  check("confirm step appears", await dialog.getByText(/vrátí se celoobrazovková/).isVisible());
  await dialog.getByRole("button", { name: "Zrušit" }).click();
  await page.waitForTimeout(300);
  check("cancel keeps the key", await dialog.getByRole("button", { name: "Odstranit klíč z prohlížeče" }).isVisible());
  await dialog.getByRole("button", { name: "Odstranit klíč z prohlížeče" }).click();
  await dialog.getByRole("button", { name: "Ano, odstranit" }).click();
  await page.waitForTimeout(1400);
  check("confirming brings the key gate back", await page.getByRole("heading", { name: "Připoj svůj klíč Ollama" }).isVisible());
  await context.close();
}

/* 4. Czech at 360px: no overflow, key field fits --------------------- */
{
  const { context, page } = await makePage(browser, { width: 360, height: 740 });
  await seed(page, { locale: "cs", decks: [DECK] });
  await page.goto(BASE, { waitUntil: "networkidle" });
  await page.waitForTimeout(1100);
  const overflow = await page.evaluate(() => document.documentElement.scrollWidth - window.innerWidth);
  check("360px: library has no horizontal overflow", overflow <= 1, String(overflow));
  await page.locator("nav.tabbar").getByRole("button").click();
  await page.getByRole("dialog").waitFor({ timeout: 6000 });
  await page.waitForTimeout(600);
  const overflow2 = await page.evaluate(() => document.documentElement.scrollWidth - window.innerWidth);
  check("360px: settings has no horizontal overflow", overflow2 <= 1, String(overflow2));
  const inputBox = await box(page.getByRole("dialog").locator("#ollama-api-key-phone"));
  const panel = await box(page.getByRole("dialog"));
  check("key field fits the sheet", inputBox.x >= panel.x && inputBox.x + inputBox.width <= panel.x + panel.width + 1);
  await context.close();
}

/* 5. axe-core contrast audit (360/390/desktop × dark/light × en/cs) -- */
const AXE = axeSource();
/* 6. frutiger aero: a third theme, no light/dark switch --------------- */
{
  const { context, page } = await makePage(browser);
  await seed(page, { decks: [DECK], theme: "aero" });
  await page.goto(BASE, { waitUntil: "networkidle" });
  await page.waitForTimeout(900);
  const state = await page.evaluate(() => ({
    aero: document.documentElement.classList.contains("aero"),
    dark: document.documentElement.classList.contains("dark"),
    sky: getComputedStyle(document.documentElement).getPropertyValue("--ice-base-top").trim(),
    themeColor: document.querySelector('meta[name="theme-color"][data-app]')?.getAttribute("content"),
  }));
  check("aero: applied without the dark class", state.aero && !state.dark, JSON.stringify(state));
  check(
    "aero: the scene becomes water",
    state.sky.length > 0 && state.sky !== "#f4f9ff" && state.sky !== "#070b16",
    state.sky,
  );
  check(
    "aero: bubbles rise",
    (await page.locator(".ice-bubble").count()) === 18 &&
      (await page.locator(".ice-bubble").first().evaluate((el) => getComputedStyle(el).animationName)) ===
        "aero-bubble-rise",
  );
  check("aero: the status bar follows the water", state.themeColor === "#2fa7e6", String(state.themeColor));
  check(
    "aero: the light/dark toggle is gone",
    (await page.getByRole("button", { name: /Switch to (light|dark) mode/ }).count()) === 0,
  );
  await page.locator("nav.tabbar").getByRole("button").click();
  await page.getByRole("dialog").waitFor({ timeout: 6000 });
  await page.waitForTimeout(600);
  const picker = page.getByRole("group", { name: "Theme" });
  check(
    "aero: settings offers light, dark and aero",
    (await picker.count()) === 1 &&
      (await picker.getByRole("button", { name: "Frutiger Aero" }).getAttribute("aria-pressed")) === "true",
  );
  await context.close();
}

/* 6b. picking Aero hides the light/dark switches immediately ---------- */
{
  const { context, page } = await makePage(browser, { width: 1280, height: 900 });
  await seed(page, { decks: [DECK], theme: "dark" });
  await page.goto(BASE, { waitUntil: "networkidle" });
  await page.waitForTimeout(1000);
  const toggleInRail = () =>
    page.evaluate(() => [...document.querySelectorAll("aside button")].some((b) => /Light mode|Dark mode/.test(b.textContent ?? "")));
  check("theme: the rail has a light/dark row while dark", await toggleInRail());
  await page.locator("aside button").filter({ hasText: /Settings|Nastavení/ }).first().click();
  await page.getByRole("dialog").waitFor({ timeout: 6000 });
  await page.waitForTimeout(500);
  await page.getByRole("group", { name: "Theme" }).getByRole("button", { name: "Frutiger Aero" }).click();
  await page.waitForTimeout(600);
  check(
    "theme: picking Aero hides it without a reload",
    (await page.evaluate(() => document.documentElement.classList.contains("aero"))) && !(await toggleInRail()),
  );
  await context.close();
}

/* 6d. touch devices blur the real backdrop (the baked layer mispaints) - */
{
  const { context, page } = await makePage(browser, { width: 390, height: 844, isMobile: true, hasTouch: true });
  await seed(page, { decks: [DECK], theme: "aero" });
  await page.goto(BASE, { waitUntil: "networkidle" });
  await page.waitForTimeout(1000);
  const glass = await page.evaluate(() => {
    const coarsish = matchMedia("(pointer: coarse)").matches || matchMedia("(max-width: 639px)").matches;
    const el = document.querySelector(".card");
    const cs = getComputedStyle(el);
    return { coarsish, backdrop: cs.backdropFilter, image: cs.backgroundImage };
  });
  check(
    "theme: touch glass is flat (no bake, no per-frame blur)",
    glass.coarsish && glass.backdrop === "none" && glass.image === "none",
    JSON.stringify(glass),
  );
  await context.close();
}

/* 6c. a dark OS preference must not leak the dark palette into Aero ------ */
{
  const { context, page } = await makePage(browser, { width: 390, height: 844, colorScheme: "dark" });
  await seed(page, { decks: [DECK], theme: "aero" });
  await page.goto(BASE, { waitUntil: "networkidle" });
  await page.waitForTimeout(1000);
  const state = await page.evaluate(() => ({
    aero: document.documentElement.classList.contains("aero"),
    dark: document.documentElement.classList.contains("dark"),
    bodyColor: getComputedStyle(document.body).color,
  }));
  check("theme: aero on a dark OS keeps the dark class off", state.aero && !state.dark);
  check("theme: boot paints the aero body text", state.bodyColor === "rgb(5, 32, 58)", state.bodyColor);
  await context.close();
}

async function audit(label, { width = 390, locale, theme, openSettingsNow }) {
  const { context, page } = await makePage(browser, { width, height: width >= 1280 ? 900 : 800, deviceScaleFactor: width >= 1280 ? 1 : 2 });
  await seed(page, { locale, theme, decks: [DECK] });
  await page.goto(BASE, { waitUntil: "networkidle" });
  await page.waitForTimeout(1200);
  if (openSettingsNow) {
    await page.locator("nav.tabbar").getByRole("button").click();
    await page.getByRole("dialog").waitFor({ timeout: 6000 });
    await page.waitForTimeout(600);
  }
  await page.addScriptTag({ content: AXE });
  const report = await page.evaluate(async () => {
    const result = await window.axe.run(document, { runOnly: ["color-contrast"] });
    return {
      violations: result.violations.map((violation) => ({
        id: violation.id,
        nodes: violation.nodes.map((node) => ({ target: node.target.join(" "), summary: node.failureSummary?.split("\n")[0] })),
      })),
    };
  });
  check(`axe ${label}: no contrast violations`, report.violations.length === 0, JSON.stringify(report.violations).slice(0, 300));
  await context.close();
}
for (const width of [360, 390, 1280]) {
  for (const theme of ["dark", "light", "aero"]) {
    for (const locale of ["en", "cs"]) {
      await audit(`${width} ${theme}/${locale} library`, { width, locale, theme });
    }
  }
}
for (const theme of ["dark", "light", "aero"]) {
  for (const locale of ["en", "cs"]) {
    await audit(`390 ${theme}/${locale} settings`, { width: 390, locale, theme, openSettingsNow: true });
  }
}

await browser.close();
finish();