// Playwright checks for the embedded web UI (src/web/ui.html).
// Runs against a live `sm121 web` server (base URL in $SM121_WEB_URL,
// provided by the Rust test `ui_playwright_checks` in src/web/tests.rs,
// which boots the server on an ephemeral port with a fake offline fleet).
//
// No npm: uses deno's npm-package specifiers. One-time browser setup:
//   deno run -A src/web/pw-install.mjs
//
// Exits 0 with "SKIP" lines when the browser is missing; non-zero on
// real failures.

import { chromium } from "npm:playwright@1.62.1";

const BASE = Deno.env.get("SM121_WEB_URL");
if (!BASE) {
  console.log("SKIP SM121_WEB_URL not set (run via cargo test ui_playwright_checks)");
  Deno.exit(0);
}

let failed = 0;
const ok = (name, cond, extra = "") => {
  if (!cond) failed++;
  console.log((cond ? "ok   " : "FAIL ") + name + (!cond && extra ? " — " + extra : ""));
};

let browser;
try {
  browser = await chromium.launch();
} catch (e) {
  console.log("SKIP playwright browser not installed — run: deno run -A src/web/pw-install.mjs");
  console.log(String(e).split("\n").find((l) => l.trim()) || "");
  Deno.exit(0);
}

const page = await (await browser.newContext()).newPage();
const pageErrors = [];
page.on("pageerror", (e) => pageErrors.push(String(e)));

// (waitUntil: "domcontentloaded" — the page is one self-contained document;
// the "load" event does not fire reliably when Playwright runs under deno)
await page.goto(BASE, { waitUntil: "domcontentloaded" });
await page.waitForSelector("#clusters .cluster", { timeout: 15000 });

// --- 1. load ---------------------------------------------------------------
ok(
  "page loads: cluster panel + 2 chips + jobs empty state",
  (await page.locator("#clusters .cluster").count()) === 1 &&
    (await page.locator("#clusters .chip").count()) === 2 &&
    (await page.locator("#jobs .jobs-empty").count()) === 1,
);

// --- topology map (structure) ---------------------------------------------------
// The fake fleet: cluster "fake" (n0) + "fake2" (n1), both lan-only (no
// ib_ip, no entities) → 2 devices, 2 lan cables, 2 frames, the passive
// 10G glyph; no HA switch glyphs.
await page.waitForSelector("#topo .dev", { timeout: 15000 });
await page.waitForTimeout(300); // let the SSE settle — no mid-rebuild tearing
const tc = await page.evaluate(() => ({
  dev: document.querySelectorAll("#topo .dev").length,
  cab: document.querySelectorAll("#topo path.c-10g:not(.flow)").length,
  fr: document.querySelectorAll("#topo .cluster-frame").length,
  sw: document.querySelectorAll("#topo .sw").length,
}));
ok(
  "topo: 2 devices + 2 lan cables + 2 frames + passive 10G glyph",
  tc.dev === 2 && tc.cab === 2 && tc.fr === 2 && tc.sw === 1,
  JSON.stringify(tc),
);



// --- 2. offline node rendering ----------------------------------------------
ok(
  "offline node: red LED + 'offline' meta",
  (await page.locator("#clusters .node .led.off").count()) === 1 &&
    (await page.locator("#clusters .nmeta").first().textContent()).includes("offline"),
);

// --- 3. theme ----------------------------------------------------------------
const themeBefore = await page.evaluate(() => document.documentElement.dataset.theme);
await page.click("#theme");
const themeAfter = await page.evaluate(() => document.documentElement.dataset.theme);
ok(
  "theme toggle flips + persists to localStorage",
  themeBefore !== themeAfter &&
    (await page.evaluate(() => localStorage.getItem("sm121-theme"))) === themeAfter,
);
await page.click("#theme");
ok(
  "theme toggles back",
  (await page.evaluate(() => document.documentElement.dataset.theme)) === themeBefore,
);

// --- 4. chip switch ------------------------------------------------------------
const chips = page.locator("#clusters .chip");
ok("one chip active initially", (await page.locator("#clusters .chip.active").count()) === 1);
await chips.nth(1).click();
ok("chip click activates it", await chips.nth(1).evaluate((el) => el.classList.contains("active")));
ok(
  "panel switched to the active cluster",
  (await page.locator("#clusters .cluster-head b").first().textContent()) === "fake2",
);

// --- 5. down-cluster action bar -------------------------------------------------
const labels = await page.locator("#clusters .actions .abtn").allTextContents();
ok(
  "down cluster offers only 'power on' + 'switch' (no serve/stop)",
  JSON.stringify(labels) === JSON.stringify(["power on", "switch"]),
);

// --- 6. power: type-the-name gate ------------------------------------------------
await page.click("#clusters .abtn:has-text('power on')");
ok("power dialog opens", await page.locator("#dlg").isVisible());
ok("type-to-confirm input shown", await page.locator("#dlg-type").isVisible());
ok("confirm hidden initially", !(await page.locator("#dlg-ok").isVisible()));
await page.fill("#dlg-type", "wrong-name");
ok("wrong name keeps confirm hidden", !(await page.locator("#dlg-ok").isVisible()));
await page.fill("#dlg-type", "fake2");
ok("exact cluster name arms confirm", await page.locator("#dlg-ok").isVisible());
await page.keyboard.press("Escape");
ok("escape closes the dialog", !(await page.locator("#dlg").isVisible()));

// --- 7. no DOM churn on an identical state (anti-blink) --------------------------
const html1 = await page.evaluate(() => document.getElementById("clusters").outerHTML);
await page.evaluate(() => onState(state.snap)); // identical snapshot, not forced
const html2 = await page.evaluate(() => document.getElementById("clusters").outerHTML);
ok("identical snapshot: no DOM churn (no blink)", html1 === html2);

// --- 8. serve/stop dialogs (controls stubbed; cancel only — no POST) --------------
await page.evaluate(() => {
  const sel = document.createElement("select");
  sel.id = "recipe-fake2";
  const o = document.createElement("option");
  o.value = "deepseek-v4-flash";
  o.textContent = "deepseek-v4-flash";
  sel.appendChild(o);
  document.body.appendChild(sel);
  const cb = document.createElement("input");
  cb.type = "checkbox";
  cb.id = "dry-fake2";
  cb.checked = false;
  document.body.appendChild(cb);
});
await page.evaluate(() => doServe("fake2"));
ok(
  "serve confirm dialog names the recipe",
  (await page.locator("#dlg").isVisible()) &&
    (await page.locator("#dlg-title").textContent()).includes("deepseek-v4-flash"),
);
await page.click("#dlg-cancel");
ok(
  "serve cancel closes with no job created",
  !(await page.locator("#dlg").isVisible()) && (await page.locator("#jobs .job").count()) === 0,
);
await page.evaluate(() => doStop("fake2"));
ok(
  "stop dialog reports no running containers",
  (await page.locator("#dlg").isVisible()) &&
    (await page.locator("#dlg-body").textContent()).includes("no containers detected"),
);
ok(
  "stop dialog offers per-node scope",
  (await page.locator("#stopnode option").count()) === 2 &&
    (await page.locator("#stopnode option").last().textContent()).includes("n1"),
);
await page.click("#dlg-cancel");

// --- 9. window manager ---------------------------------------------------------
const before = await page.locator("#win-state").boundingBox();
const barBox = await page.locator("#win-state .win-bar").boundingBox();
await page.mouse.move(barBox.x + barBox.width / 2, barBox.y + 5);
await page.mouse.down();
await page.mouse.move(barBox.x + barBox.width / 2 + 80, barBox.y + 5 + 50, { steps: 5 });
await page.mouse.up();
const after = await page.locator("#win-state").boundingBox();
ok(
  "titlebar drag moves the state window",
  Math.abs(after.x - (before.x + 80)) < 3 && Math.abs(after.y - (before.y + 50)) < 3,
  `dx=${(after.x - before.x).toFixed(1)} dy=${(after.y - before.y).toFixed(1)}`,
);

// --- 10. minimize / restore ------------------------------------------------------
await page.click("#win-state .wbtn[data-act=min]");
ok(
  "minimize hides the window and adds a dock chip",
  !(await page.locator("#win-state").isVisible()) &&
    (await page.locator("#dock .dock-chip:has-text('Cluster state')").count()) === 1,
);
await page.click("#dock .dock-chip:has-text('Cluster state')");
ok(
  "dock chip restores the window",
  await page.locator("#win-state").isVisible(),
);

// --- 11. log window: spawn, SSE lines, pause, close ------------------------------
await page.evaluate(() => openLog("fake", "n0", "deepseek-v4-flash"));
await page.waitForSelector(".logwin", { timeout: 10000 });
ok("log window spawned (attach l1)", (await page.locator(".logwin").count()) === 1);
await page.evaluate(() => onLog({ type: "log", attach: "l1", line: "hello-from-ui-test" }));
ok(
  "SSE log line lands in the window",
  (await page.locator(".logwin .logpre").textContent()).includes("hello-from-ui-test"),
);
await page.click(".logwin .logpause");
await page.evaluate(() => onLog({ type: "log", attach: "l1", line: "while-paused" }));
ok(
  "paused window buffers the line",
  !(await page.locator(".logwin .logpre").textContent()).includes("while-paused"),
);
await page.click(".logwin .logpause");
ok(
  "unpause flushes the buffer",
  (await page.locator(".logwin .logpre").textContent()).includes("while-paused"),
);
await page.click(".logwin .wbtn[data-act=close]");
ok(
  "closing the log window removes it (detach sent)",
  (await page.locator(".logwin").count()) === 0,
);

// --- 11b. dead stream: 'stream ended' note + second click re-attaches -----------
// (fake fleet: the SSH stream to the refused port dies instantly, so the full
// dead-stream lifecycle is deterministic here)
await page.evaluate(() => openLog("fake", "n0", "deepseek-v4-flash"));
await page.waitForSelector(".logwin", { timeout: 10000 });
await page.waitForFunction(
  () => (document.querySelector(".logwin .lognote").textContent || "").includes("stream ended"),
  { timeout: 8000 },
);
ok("dead stream shows the 'stream ended' note", true);
// (dispatchEvent — the open log window overlaps the state window and would
// swallow a physical click at the chip's coordinates)
await page.locator("#clusters .chip").nth(0).dispatchEvent("click"); // back to cluster 'fake' (check 4 left it on 'fake2')
await page.locator("#clusters .node").first().dispatchEvent("click");
const flashed = await page.evaluate(() => document.querySelector(".logwin").classList.contains("flash"));
ok(
  "second click gives feedback (flash) without a duplicate window",
  flashed && (await page.locator(".logwin").count()) === 1,
);

// --- 12. node click: log window with no containers ---------------------------------
for (const btn of await page.locator(".logwin .wbtn[data-act=close]").all()) {
  await btn.click(); // clear any windows left by earlier checks
}
await page.locator("#clusters .chip").nth(1).click(); // fake2 / n1
await page.click("#clusters .node");
ok(
  "node click opens a log window (no containers note)",
  (await page.locator(".logwin").count()) === 1 &&
    (await page.locator(".logwin .lognote").textContent()).includes("no sm121 containers"),
);
ok(
  "visible logs button exists on the node row",
  (await page.locator("#clusters .node .logsbtn").count()) >= 1,
);
await page.click("#clusters .node .logsbtn");
ok(
  "logs button on an already-open node fronts, not duplicates",
  (await page.locator(".logwin").count()) === 1,
);
// Regression (win-vs-object compare in onClosed): close used to leave the
// logWins entry behind, so the re-open click just 'fronted' the detached
// window and nothing appeared.
await page.click(".logwin .wbtn[data-act=close]");
ok("closing a log window removes it", (await page.locator(".logwin").count()) === 0);
await page.click("#clusters .node .logsbtn");
ok(
  "re-open after close shows a fresh window",
  (await page.locator(".logwin").count()) === 1,
);

// the header carries window chrome only while something IS maximized
// (`display: flex` used to defeat the `hidden` attribute → permanent litter)
ok(
  "header is bare until a window is maximized",
  await page.evaluate(() => document.querySelector("#maxinfo").getBoundingClientRect().width === 0),
);

// --- 13. raw window (via the dock ＋ new-window menu) -------------------------------
await page.click("#dock .plus");
ok(
  "dock ＋ menu lists topo / state / jobs / recipes / logs / raw",
  (await page.locator(".dockmenu .dock-chip").count()) === 6,
);
await page.click('.dockmenu .dock-chip:has-text("raw")');
await page.waitForSelector(".rawwin", { timeout: 10000 });
ok("raw window opens via the new-window menu", (await page.locator(".rawwin").count()) === 1);
await page.selectOption(".rawwin select", "effective");
await page.waitForFunction(
  () => (document.querySelector(".rawwin .rawpre").textContent || "").includes('"clusters"'),
  null,
  { timeout: 5000 },
);
ok("raw: effective shows the merged config JSON", true);
await page.selectOption(".rawwin select", "config");
await page.waitForFunction(
  () => (document.querySelector(".rawwin .rawpre").textContent || "").includes("ssh_user"),
  { timeout: 5000 },
);
ok("raw: config shows the file verbatim", true);
ok(
  "skeleton shimmer cleared after first state",
  (await page.locator(".skeleton").count()) === 0,
);
const monoFont = await page.evaluate(
  () => getComputedStyle(document.querySelector(".rawwin .logpre")).fontFamily,
);
ok(
  "monospace content uses the alacritty font (DMMono Nerd Font)",
  monoFont.replace(/"/g, "").startsWith("DMMono Nerd Font"),
  monoFont,
);

// --- topology map (interaction) ---------------------------------------------------
// frame chip click activates the cluster (frames sit behind devices —
// the chip is the always-clickable part); hide the other windows first —
// earlier test steps leave log/raw windows stacked over the map
await page.evaluate(() => {
  for (const w of document.querySelectorAll(".win")) if (w.id !== "win-topo") w.style.display = "none";
});
await page.click('#topo .fchip[data-cluster="fake2"]');
await page.waitForFunction(
  () => document.querySelector("#clusters .chip.active")?.textContent?.includes("fake2"),
  { timeout: 5000 },
);
ok("topo: frame chip click activates cluster", true);

// --- topology power policy: an HA-OFF switch can never have green ports ---
// the pure fabPortOn policy extracted from the live page (between the
// TOPOPORT markers) and probed under deno, like the report's notifDiff
const html = await page.content();
const s = html.indexOf("/*TOPOPORT:START*/"), e = html.indexOf("/*TOPOPORT:END*/");
ok("topo: fabPortOn policy present in page", s >= 0 && e > s);
if (s >= 0 && e > s) {
  const fab = new Function(html.slice(s + "/*TOPOPORT:START*/".length, e) + "\nreturn fabPortOn;")();
  ok("topo: switch on + occupied -> port green", fab(true, true) === true);
  ok("topo: switch OFF + occupied -> port NOT green", fab(false, true) === false);
  ok("topo: switch OFF + idle -> port not green", fab(false, false) === false);
  ok("topo: switch unknown + occupied -> green (inconclusive)", fab(undefined, true) === true);
  ok("topo: switch on + idle -> port not green", fab(true, false) === false);
}

// --- 14. recipes panel: the `sm121 report --serve` page, mounted at /recipes -----
await page.click("#dock .plus");
await page.click('.dockmenu .dock-chip:text-is("recipes")');
await page.waitForSelector("#win-recipes iframe", { timeout: 10000 });
const recipes = page.frameLocator("#win-recipes iframe");
await recipes.locator("table").first().waitFor({ timeout: 10000 });
ok("recipes: panel page loads in its window", (await page.locator("#win-recipes iframe").count()) === 1);
ok("recipes: table rendered", (await recipes.locator("tr.row").count()) > 0);
ok(
  "recipes: its own SSE stream is live behind the prefix",
  (await recipes.locator("#live").innerText()).includes("live"),
);
// the iframe inherits the dashboard's colour scheme (report page is
// `light dark` and would otherwise follow the OS)
const scheme = await page.evaluate(() =>
  getComputedStyle(document.querySelector("#win-recipes iframe")).colorScheme,
);
ok("recipes: iframe colour-scheme follows the theme", scheme === "light" || scheme === "dark", scheme);
// the report page's own paths move with the mount (dashboard owns /events)
ok(
  "recipes: iframe loads the mounted panel",
  (await page.locator("#win-recipes iframe").getAttribute("src")) === "/recipes",
);
// hosted copy drops its own branding (the window bar names it) and keeps
// its live chip only as a warning — the dashboard header already says live
ok(
  "recipes: embedded page hides its own title",
  (await recipes.locator("h1").isVisible()) === false,
);
ok(
  "recipes: embedded page drops its live chip (same server, same liveness)",
  (await recipes.locator("#live").evaluate((e) => getComputedStyle(e).display)) === "none",
);
ok(
  "recipes: embedded page keeps its filter controls",
  (await recipes.locator("#bar").isVisible()) === true,
);
ok(
  "recipes: body is marked as hosted (one implementation, adapted chrome)",
  (await recipes.locator("body").getAttribute("class")) === "embed",
);
// minimize must land in the dock (this window used to vanish: only the
// three named windows were in the dock's registry)
await page.click("#win-recipes .win-bar .wbtn[data-act='min']");
ok(
  "recipes: minimize leaves a dock chip",
  (await page.locator('#dock .dock-chip:has-text("Recipes")').count()) === 1,
);
await page.click('#dock .dock-chip:has-text("Recipes")');
await page.waitForTimeout(400); // winIn animation replays on re-display
ok(
  "recipes: dock chip restores the window",
  (await page.evaluate(() => getComputedStyle(document.querySelector("#win-recipes")).display)) !== "none",
);
// maximize fills the layer, a second click restores the old geometry
const wBefore = await page.evaluate(
  () => Math.round(document.querySelector("#win-recipes").getBoundingClientRect().width),
);
await page.click("#win-recipes .win-bar .wbtn[data-act='max']");
await page.waitForTimeout(400);
const m = await page.evaluate(() => {
  const w = document.querySelector("#win-recipes");
  const cs = getComputedStyle(w);
  const r = w.getBoundingClientRect();
  const lr = document.querySelector("#winlayer").getBoundingClientRect();
  return {
    w: [Math.round(r.width), Math.round(r.height)],
    l: [Math.round(lr.width), Math.round(lr.height)],
    strip: Math.round(document.querySelector("#dock").getBoundingClientRect().top - r.bottom),
    border: cs.borderTopWidth,
    radius: cs.borderRadius,
    label: document.querySelector("#maxinfo").getBoundingClientRect().width === 0
      ? ""
      : document.querySelector("#max-title").textContent,
  };
});
ok(
  "recipes: maximize fills the layer flush (no strip above the dock)",
  m.strip === 0 && Math.abs(m.w[0] - m.l[0]) < 2 && Math.abs(m.w[1] - m.l[1]) < 2,
  JSON.stringify(m),
);
ok("recipes: maximized window has no frame", m.border === "0px" && m.radius === "0px", `${m.border} / ${m.radius}`);
ok(
  "recipes: maximized window keeps no titlebar (title lives in the header)",
  (await page.evaluate(() => getComputedStyle(document.querySelector("#win-recipes .win-bar")).display)) === "none",
);
ok(
  "recipes: maximized content starts at the layer top",
  await page.evaluate(
    () =>
      Math.abs(
        document.querySelector("#win-recipes .win-body").getBoundingClientRect().top -
          document.querySelector("#winlayer").getBoundingClientRect().top,
      ) < 2,
  ),
);
ok("recipes: header carries the window controls", (await page.locator("#maxinfo .wbtn").count()) === 3);
ok("recipes: maximized title moves into the header", m.label === "Recipes", m.label);
// the dock stays reachable under a maximized window
ok(
  "recipes: dock stays usable while maximized",
  await page.evaluate(() => {
    const b = document.querySelector("#dock").getBoundingClientRect();
    return !!document.elementFromPoint(b.x + 20, b.y + b.height / 2)?.closest("#dock");
  }),
);
await page.click("#max-restore"); // header restore button
await page.waitForTimeout(400);
ok(
  "recipes: header button un-maximizes back to the old size",
  Math.abs(
    (await page.evaluate(() => Math.round(document.querySelector("#win-recipes").getBoundingClientRect().width))) - wBefore,
  ) < 2,
);
ok(
  "recipes: header label cleared after restore",
  await page.evaluate(() => document.querySelector("#maxinfo").getBoundingClientRect().width === 0),
);
// header controls must work while the window has no titlebar of its own
await page.click("#win-recipes .win-bar .wbtn[data-act='max']");
await page.waitForTimeout(400);
await page.click("#max-min");
await page.waitForTimeout(200);
ok(
  "recipes: header minimize hides the window but keeps its maximize state (no dock chip)",
  (await page.locator('#dock .dock-chip:has-text("Recipes")').count()) === 0 &&
    (await page.evaluate(() => {
      const w = document.querySelector("#win-recipes");
      return w.style.display === "none" && w.classList.contains("max");
    })),
);
// the ▦ switcher lists the hidden maximized window and brings it back full-screen
await page.click("#winmenu");
await page.waitForTimeout(200);
ok(
  "recipes: switcher lists the hidden maximized window",
  (await page.locator(".winmenu .dock-chip:has-text('Recipes')").count()) === 1,
);
await page.click(".winmenu .dock-chip:has-text('Recipes')");
await page.waitForTimeout(400);
ok(
  "recipes: switcher shows it maximized again (full layer)",
  await page.evaluate(() => {
    const w = document.querySelector("#win-recipes");
    const lr = document.querySelector("#winlayer").getBoundingClientRect();
    return w.style.display !== "none" && w.classList.contains("max") && Math.abs(w.getBoundingClientRect().width - lr.width) < 2;
  }),
);
await page.evaluate(() => document.querySelector("#win-recipes").style.display = "none");

// the map is a fixed-aspect drawing: its window is sized to it, otherwise
// the SVG letterboxes and the panel is half empty
const band = await page.evaluate(() => {
  const svg = document.querySelector("#win-topo svg");
  const body = document.querySelector("#win-topo .win-body");
  const vb = svg.viewBox.baseVal;
  const bb = body.getBoundingClientRect();
  const scale = Math.min(bb.width / vb.width, bb.height / vb.height);
  return Math.round((bb.height - vb.height * scale) / 2);
});
ok("topo: window fits the drawing (no letterbox bands)", band < 8, String(band));

// fan glyph: the rotation must be hub-centered (fill-box origin wobbled it)
{
  const fanHub = await page.evaluate(() => {
    const h = document.querySelector("#topo .fan .hub");
    if (!h) return null;
    const r = h.getBoundingClientRect();
    return [r.x + r.width / 2, r.y + r.height / 2];
  });
  if (fanHub) {
    await page.waitForTimeout(260);
    const fanHub2 = await page.evaluate(() => {
      const h = document.querySelector("#topo .fan .hub");
      const r = h.getBoundingClientRect();
      return [r.x + r.width / 2, r.y + r.height / 2];
    });
    const drift = Math.hypot(fanHub[0] - fanHub2[0], fanHub[1] - fanHub2[1]);
    ok("topo: fan spin is hub-centered (no wobble)", drift < 2, `${drift.toFixed(2)}px drift`);
  }
}

// the default layout ends flush at the dock: px geometry is clamped to the
// layer, which shrinks when the dock (a sibling) becomes visible
const flush = await page.evaluate(() => {
  const dock = document.querySelector("#dock").getBoundingClientRect();
  const shown = [...document.querySelectorAll(".win")].filter(
    (w) => !w.classList.contains("max") && getComputedStyle(w).display !== "none",
  );
  return Math.round(dock.top - Math.max(...shown.map((w) => w.getBoundingClientRect().bottom)));
});
ok("windows end flush at the dock strip (no dead space)", Math.abs(flush) <= 1, String(flush));

// --- 15. window layout survives a reload (localStorage) ---------------------------
await page.evaluate(() => {
  const t = document.querySelector("#win-topo");
  t.style.left = "40px"; t.style.top = "20px"; t.style.width = "700px"; t.style.height = "300px";
  document.querySelector("#win-state .win-bar .wbtn[data-act='min']").click();
  document.querySelector("#win-jobs .win-bar .wbtn[data-act='close']").click();
});
await page.click("#dock .plus");
await page.click('.dockmenu .dock-chip:text-is("recipes")');
await page.waitForSelector("#win-recipes iframe");
await page.waitForTimeout(400);
// the window may already come back maximized (state is kept) — only
// maximize when it isn't (the button is a toggle)
await page.evaluate(() => {
  const w = document.querySelector("#win-recipes");
  if (!w.classList.contains("max"))
    document.querySelector("#win-recipes .win-bar .wbtn[data-act='max']").click();
});
await page.waitForTimeout(500);
const laidOut = await page.evaluate(() => ({
  saved: JSON.parse(localStorage.getItem("sm121-wins") || "null"),
  topo: (() => { const b = document.querySelector("#win-topo").getBoundingClientRect(); return [Math.round(b.x), Math.round(b.y), Math.round(b.width), Math.round(b.height)]; })(),
}));
ok("layout: state written to localStorage", !!laidOut.saved?.topo?.width, JSON.stringify(laidOut.saved?.topo));
await page.reload({ waitUntil: "domcontentloaded" });
await page.waitForTimeout(2500);
const back = await page.evaluate(() => {
  const box = (sel) => { const e = document.querySelector(sel); if (!e) return null; const b = e.getBoundingClientRect(); return [Math.round(b.x), Math.round(b.y), Math.round(b.width), Math.round(b.height)]; };
  return {
    topo: box("#win-topo"),
    stateMin: getComputedStyle(document.querySelector("#win-state")).display === "none",
    jobsClosed: getComputedStyle(document.querySelector("#win-jobs")).display === "none",
    recipesMax: document.querySelector("#win-recipes")?.classList.contains("max") ?? false,
    chips: [...document.querySelectorAll("#dock .dock-chip")].map((c) => c.textContent),
    header: document.querySelector("#maxinfo").getBoundingClientRect().width === 0 ? "" : document.querySelector("#max-title").textContent,
  };
});
ok(
  "layout: geometry restored after reload",
  JSON.stringify(back.topo) === JSON.stringify(laidOut.topo),
  `${JSON.stringify(laidOut.topo)} -> ${JSON.stringify(back.topo)}`,
);
ok("layout: minimized window stays minimized", back.stateMin);
ok("layout: closed window stays closed, with a dock chip to reopen", back.jobsClosed && back.chips.includes("＋ Jobs"), JSON.stringify(back.chips));
ok("layout: maximized recipes window restored maximized", back.recipesMax && back.header === "Recipes", back.header);

// --- topology cable mode: direct (S-curve) and bus + bridges --------------------
{
  await page.waitForFunction(() => state.snap && state.snap.topo && state.snap.topo.nodes);
  const hasRow1 = await page.evaluate(() => state.snap.topo.nodes.length > 4);
  const fab200 = await page.evaluate(() =>
    [...document.querySelectorAll("#topo path.c-200g")].map((p) => p.getAttribute("d")),
  );
  const row1 = fab200.filter((d) => d && d.includes(" 386 "));
  if (hasRow1) {
    ok("topo: row-1 fabric cables present", row1.length > 0, `of ${fab200.length}`);
    ok(
      "topo: row-1 fabric cable approaches the port vertically (S-curve, no side entry)",
      row1.every((d) => / C .* 366 .* 346$/.test(d)),
      row1.join(" "),
    );
  } else {
    ok("topo: no bottom-row devices in this fleet (S-curve path n/a)", row1.length === 0);
  }

  await page.evaluate(() => document.querySelector("#topo [data-topobus]").dispatchEvent(new MouseEvent("click", { bubbles: true })));
  await page.waitForTimeout(400);
  const bus = await page.evaluate(() => {
    const t = state.snap.topo;
    const lane = [];
    for (const l of t.links.filter((x) => x.kind === "200g")) {
      const fi = tgIdx(t, l.a);
      if (fi < 4) continue;
      const px = tgPos(fi).px;
      const dx = tgPos(tgIdx(t, l.b)).dcx;
      lane.push({ x1: Math.min(dx, px), x2: Math.max(dx, px) });
    }
    let expect = 0;
    for (const l of t.links.filter((x) => x.kind === "10g")) {
      const bi = tgIdx(t, l.b);
      if (bi < 4) continue;
      const x = tgPos(bi).dcx;
      if (x >= 370 && x <= 690) continue;
      if (lane.some((h) => x > h.x1 + 2 && x < h.x2 - 2)) expect++;
    }
    return {
      legend: document.querySelector("#topo [data-topobus]").textContent,
      manhattan: [...document.querySelectorAll("#topo path.c-200g")].filter((p) => (p.getAttribute("d") || "").includes(" L ")).length,
      bridges: document.querySelectorAll("#topo path.bridge").length,
      expect,
      bridgesDrawn: [...document.querySelectorAll("#topo path.bridge")].every((b) => (b.getAttribute("d") || "").includes("A 5 5")),
    };
  });
  ok("topo: bus mode active (legend)", bus.legend.includes("bus"), bus.legend);
  if (hasRow1)
    ok("topo: bus cables run Manhattan (L segments)", bus.manhattan >= 1, `manhattan=${bus.manhattan}`);
  ok("topo: bridges rendered exactly at strict crossings", bus.bridges === bus.expect && bus.bridgesDrawn, `bridges=${bus.bridges} expect=${bus.expect}`);

  await page.evaluate(() => document.querySelector("#topo [data-topobus]").dispatchEvent(new MouseEvent("click", { bubbles: true })));
  await page.waitForTimeout(400);
  const back2 = await page.evaluate(() => ({
    legend: document.querySelector("#topo [data-topobus]").textContent,
    curved: [...document.querySelectorAll("#topo path.c-200g")].filter((p) => (p.getAttribute("d") || "").includes(" C ")).length,
  }));
  ok(
    "topo: back to direct mode",
    back2.legend.includes("direct") && (fab200.length === 0 || back2.curved >= 1),
    JSON.stringify(back2),
  );
  ok("topo: mode choice persisted", await page.evaluate(() => localStorage.getItem("sm121-topobus") === "0"));
}

// --- no page JS errors across the whole flow -------------------------------------
ok("no page JS errors", pageErrors.length === 0, pageErrors.join("; "));

await browser.close();
if (failed) {
  console.log(`\n${failed} UI check(s) FAILED`);
  Deno.exit(1);
}
console.log("\nall UI checks passed");