import { test, expect } from "@playwright/test";
import { writeFile } from "node:fs/promises";

const consoleEntries = new WeakMap();
const runtimeErrors = new WeakMap();

test.beforeEach(async ({ page }, testInfo) => {
  const logs = [];
  const errors = [];
  consoleEntries.set(page, logs);
  runtimeErrors.set(page, errors);
  await page.emulateMedia({ colorScheme: testInfo.project.metadata.theme, reducedMotion: testInfo.project.metadata.reduced ? "reduce" : "no-preference" });
  page.on("console", (message) => logs.push({ type: message.type(), text: message.text() }));
  page.on("pageerror", (error) => errors.push({ name: error.name, message: error.message, stack: error.stack }));
  await page.goto("/");
  await expect(page.locator(".app-shell")).toBeVisible();
  const theme = testInfo.project.metadata.theme;
  await page.evaluate((requested) => {
    document.documentElement.dataset.theme = requested;
    localStorage.setItem("forgeflow-demo-theme", requested);
  }, theme);
});

test.afterEach(async ({ page }, testInfo) => {
  const logs = consoleEntries.get(page) || [];
  const errors = runtimeErrors.get(page) || [];
  if (testInfo.status !== testInfo.expectedStatus) {
    const prefix = testInfo.outputPath("failure");
    await writeFile(`${prefix}-console.json`, JSON.stringify({ test: testInfo.title, project: testInfo.project.name, metadata: testInfo.project.metadata, logs, errors }, null, 2));
    await writeFile(`${prefix}-dom.html`, await page.content());
    await writeFile(`${prefix}-fixture.json`, JSON.stringify({ url: page.url(), viewport: page.viewportSize(), theme: await page.locator("html").getAttribute("data-theme") }, null, 2));
  }
  expect(errors, "page errors").toEqual([]);
  expect(logs.filter((entry) => entry.type === "error"), "console errors").toEqual([]);
});

async function assertSurface(page) {
  const audit = await page.evaluate(() => {
    const interactive = [...document.querySelectorAll('button,input,select,textarea,a[href],[role="button"]')].filter((element) => {
      const style = getComputedStyle(element);
      return style.display !== "none" && style.visibility !== "hidden" && element.getBoundingClientRect().width > 0;
    });
    const unnamed = interactive.filter((element) => !String(element.getAttribute("aria-label") || element.getAttribute("title") || element.labels?.[0]?.textContent || element.textContent || element.value || "").trim());
    const outside = interactive.filter((element) => { const rect = element.getBoundingClientRect(); const fixed = ["fixed", "sticky"].includes(getComputedStyle(element).position) || Boolean(element.closest('[role="dialog"]')); return rect.left < -1 || rect.right > innerWidth + 1 || (fixed && (rect.top < -1 || rect.bottom > innerHeight + 1)); });
    const text = document.body.innerText;
    return {
      horizontalOverflow: document.documentElement.scrollWidth > document.documentElement.clientWidth + 1,
      unnamed: unnamed.map((element) => element.outerHTML.slice(0, 180)),
      outside: outside.map((element) => element.outerHTML.slice(0, 180)),
      badTokens: ["undefined", "[object Object]", "â", "Â", "Ã"].filter((token) => text.includes(token)),
      nullText: /(^|\s)null($|\s)/i.test(text),
      headings: [...document.querySelectorAll("h1,h2,h3")].map((heading) => Number(heading.tagName[1])),
    };
  });
  expect(audit.horizontalOverflow).toBe(false);
  expect(audit.unnamed).toEqual([]);
  expect(audit.outside).toEqual([]);
  expect(audit.badTokens).toEqual([]);
  expect(audit.nullText).toBe(false);
  expect(audit.headings.length).toBeGreaterThan(0);
}

async function assertScrollableWhenOverflowing(page, selector) {
  const target = page.locator(selector);
  await expect(target).toBeVisible();
  await expect(target).toHaveCSS("overflow-y", /auto|scroll/);
  let metrics;
  await expect.poll(async () => {
    metrics = await target.evaluate((element) => ({
      connected: element.isConnected,
      clientHeight: element.clientHeight,
      scrollHeight: element.scrollHeight,
    }));
    return metrics.connected && metrics.clientHeight > 0;
  }).toBe(true);
  if (metrics.scrollHeight > metrics.clientHeight + 1) {
    await expect.poll(() => target.evaluate((element) => {
      if (element.scrollHeight <= element.clientHeight + 1) return 1;
      element.scrollTop = element.scrollHeight;
      return element.scrollTop;
    })).toBeGreaterThan(0);
  }
}
test("shell, overview, repositories and settings remain responsive and accessible", async ({ page }, testInfo) => {
  await assertSurface(page);
  for (const view of ["overview", "deployments", "settings"]) {
    await page.locator(`.nav-button[data-action="navigate"][data-view="${view}"]`).click();
    await expect(page.locator("main")).toBeVisible();
    await assertSurface(page);
  }
  await expect(page.locator("html")).toHaveAttribute("data-theme", String(testInfo.project.metadata.theme));
  if (testInfo.project.metadata.reduced) {
    expect(await page.evaluate(() => matchMedia("(prefers-reduced-motion: reduce)").matches)).toBe(true);
  }
});

test("repository changes, Git tools and Git Validator complete their primary flow", async ({ page }) => {
  await page.locator('[data-action="select-repo"]').first().click();
  await expect(page.locator('[data-action="repo-tab"]')).toHaveCount(6);
  for (const tab of ["changes", "history", "deployments", "gittools", "validator", "settings"]) {
    const control = page.locator(`[data-action="repo-tab"][data-tab="${tab}"]`);
    if (await control.count()) {
      await control.click();
      await expect(control).toHaveClass(/active/);
      await assertSurface(page);
    }
  }
  await page.locator('[data-action="repo-tab"][data-tab="validator"]').click();
  await expect(page.locator(".validator-score")).toBeVisible();
  await assertScrollableWhenOverflowing(page, ".validator-page");
  await expect(page.locator("#validator-policy")).toBeVisible();
  await page.locator("#validator-policy").selectOption("production");
  await expect(page.locator(".validator-hero")).toContainText(/Production policy/i);
  await expect(page.locator(".validator-hero")).toContainText(/review required/i);
  await page.keyboard.press("Tab");
  await expect(page.locator(":focus")).toBeVisible();
});

test("every long application surface retains a working vertical scroll owner", async ({ page }) => {
  for (const view of ["overview", "deployments", "diagnostics", "settings"]) {
    await test.step(`${view} view scrolls`, async () => {
      const navigation = page.locator(`.nav-button[data-view="${view}"]`);
      await navigation.click();
      await expect(navigation).toHaveClass(/active/);
      await assertScrollableWhenOverflowing(page, ".main-canvas");
    });
  }
  await page.locator('[data-action="select-repo"]').first().click();
  for (const tab of ["history", "deployments", "gittools", "validator", "settings"]) {
    await page.locator(`[data-action="repo-tab"][data-tab="${tab}"]`).click();
    const scrollRoot = page.locator(".repo-content > .tab-page, .repo-content > .validator-page");
    if (await scrollRoot.count())
      await assertScrollableWhenOverflowing(page, ".repo-content > .tab-page, .repo-content > .validator-page");
  }
});
test("deployment inventory supports dense workloads without ambiguous blank cards", async ({ page }) => {
  await page.locator('.nav-button[data-action="navigate"][data-view="deployments"]').click();
  await expect(page.locator(".deploy-card, .server-inventory-panel .tool-row").first()).toBeVisible();
  const cards = page.locator(".deploy-card, .server-inventory-panel .tool-row");
  const count = await cards.count();
  expect(count).toBeGreaterThan(0);
  for (let index = 0; index < Math.min(count, 25); index += 1) {
    await expect(cards.nth(index)).not.toHaveText(/^\s*$/);
  }
  const unresolved = page.locator(".tool-row", { hasText: "Legacy Worker" });
  await expect(unresolved).toContainText("Link unresolved");
  await expect(unresolved).not.toContainText(/^Linked$/);
  await expect(page.locator(".server-inventory-panel").first()).toContainText("1 unresolved");
  const repositoryLink = page.locator('[data-action="open-deployment-link"]');
  if (await repositoryLink.count()) {
    await repositoryLink.first().click();
    await expect(page.locator('.repo-row.active')).toHaveAttribute("data-deployment-count", /^[1-9]/);
    await expect(page.locator('.repo-row.active .deployment-badge')).toBeVisible();
    await expect(page.locator('.tab[data-action="repo-tab"][data-tab="deployments"]')).toHaveClass(/active/);
    await expect(page.locator(".repository-workloads")).toBeVisible();
    await expect(page.locator(".repository-workload-row").first()).toContainText("Repository linked");
  }
  await assertSurface(page);
});

test("dialogs expose semantics, labels, keyboard close and focus restoration", async ({ page }) => {
  await page.locator('[data-action="select-repo"]').first().click();
  const trigger = page.locator('[data-action="edit-deployment-profile"], [data-action="add-deployment-profile"]').first();
  if (await trigger.count()) {
    await trigger.focus();
    await trigger.click();
    const dialog = page.locator('[role="dialog"]');
    await expect(dialog).toBeVisible();
    await expect(dialog.locator("button").first()).toBeVisible();
    await page.keyboard.press("Escape");
    await expect(dialog).toHaveCount(0);
  }
  await assertSurface(page);
});

test("onboarding and updater states remain usable without an existing configuration", async ({ page }) => {
  await page.evaluate(() => localStorage.setItem("forgeflow-demo-setup", "false"));
  await page.reload();
  await expect(page.locator(".setup-window")).toBeVisible();
  await expect(page.getByRole("heading", { name: "Check this computer" })).toBeVisible();
  await page.locator('[data-action="setup-run-preflight"]').click();
  await expect(page.locator('[data-action="setup-continue"]')).toBeEnabled();
  await assertSurface(page);
  await page.evaluate(() => localStorage.setItem("forgeflow-demo-setup", "true"));
  await page.reload();
  await page.locator('.nav-button[data-view="settings"]').click();
  await page.locator('[data-action="check-updates"]').first().click();
  await expect(page.locator(".update-card")).toContainText(/ForgeFlow/i);
  await assertSurface(page);
});

test("inventory, deployment safety and failure evidence dialogs are reviewable", async ({ page }) => {
  await page.locator('.nav-button[data-view="deployments"]').click();
  const reconciliation = page.locator('[data-action="plan-server-reconciliation"]').first();
  if (await reconciliation.count()) {
    await reconciliation.click();
    await expect(page.locator('[role="dialog"]')).toContainText(/reconciliation/i);
    await page.keyboard.press("Escape");
  }
  const keyLifecycle = page.locator('[data-action="manage-deploy-key"]').first();
  if (await keyLifecycle.count()) {
    await keyLifecycle.click();
    await expect(page.locator('[role="dialog"]')).toContainText(/Deploy key lifecycle/i);
    await page.keyboard.press("Escape");
  }
  const preflight = page.locator('[data-action="run-deployment-preflight"]').first();
  await preflight.click();
  await expect(page.locator('[role="dialog"]')).toContainText(/preflight/i);
  await page.keyboard.press("Escape");
  const failed = page.locator('[data-action="open-operation"]').last();
  if (await failed.count()) {
    await failed.click();
    await expect(page.locator('[role="dialog"]')).toContainText(/failed|failure|healthcheck/i);
    await page.keyboard.press("Escape");
  }
  await assertSurface(page);
});

// A repository or deployment poll renders the whole shell again. Changing an
// unrelated part of the state is what a poll effectively does, and it must not
// take the caret or the scroll position away from the user.
async function forceUnrelatedRerender(page) {
  await page.evaluate(() => {
    ui.diagnosticsStatus = { ...(ui.diagnosticsStatus || {}), enabled: !(ui.diagnosticsStatus?.enabled === false) };
    render();
  });
}

test("a background refresh keeps typing and caret position intact", async ({ page }) => {
  const search = page.locator("#global-search");
  await search.click();
  await search.fill("Forge");
  // Typing schedules a debounced render. Wait for it, otherwise the caret below
  // can land on the element that render is about to replace.
  await expect.poll(() => page.evaluate(() => ui.inputRenderTimer === null)).toBe(true);
  await search.evaluate((element) => element.setSelectionRange(1, 3));

  await forceUnrelatedRerender(page);

  await expect(search).toBeFocused();
  expect(await search.inputValue()).toBe("Forge");
  expect(await search.evaluate((element) => [element.selectionStart, element.selectionEnd])).toEqual([1, 3]);
});

test("a background refresh keeps scroll offsets intact", async ({ page }) => {
  await page.locator('.nav-button[data-action="navigate"][data-view="settings"]').click();
  const canvas = page.locator(".main-canvas");
  const scrolled = await canvas.evaluate((element) => {
    element.scrollTop = Math.min(120, Math.max(0, element.scrollHeight - element.clientHeight));
    return element.scrollTop;
  });
  expect(scrolled).toBeGreaterThan(0);

  await forceUnrelatedRerender(page);

  expect(await canvas.evaluate((element) => element.scrollTop)).toBe(scrolled);
});

test("sections that used to be injected after render are part of the rendered markup", async ({ page }) => {
  await page.locator('.nav-button[data-action="navigate"][data-view="diagnostics"]').click();
  const auditPanel = page.locator(".diagnostics-page .section-block", { hasText: "Operational audit log" });
  await expect(auditPanel).toBeVisible();
  await expect(auditPanel).toContainText("Load the operational audit log");

  // The audit rows are state the shell renders itself now, so a plain render has
  // to pick them up without any post-render injection step.
  await page.evaluate(() => {
    ui.auditEvents = [{ timestamp: new Date().toISOString(), event: "deployment.requested", details: { repository: "Jens/Probe", result: "queued" } }];
    render();
  });
  await expect(auditPanel.locator("table.data-table")).toContainText("Jens/Probe");
  await expect(auditPanel.locator("table.data-table")).toContainText("deployment.requested");
});

test("an unchanged render leaves the existing DOM in place", async ({ page }) => {
  await page.locator('[data-action="select-repo"]').first().click();
  const marked = await page.evaluate(() => {
    // Relative timestamps ("just now" turning into "1m ago") and pending async
    // state legitimately change the markup between two renders that are seconds
    // apart. Rendering twice inside one synchronous block removes that window,
    // so the second render can only be skipped because nothing changed.
    render();
    document.querySelector(".repo-list").dataset.renderProbe = "kept";
    render();
    return document.querySelector(".repo-list")?.dataset.renderProbe || null;
  });
  expect(marked).toBe("kept");

  const replaced = await page.evaluate(() => {
    document.querySelector(".repo-list").dataset.renderProbe = "kept";
    ui.repoSearch = `probe-${Date.now()}`;
    render();
    return document.querySelector(".repo-list")?.dataset.renderProbe || null;
  });
  expect(replaced).toBe(null);
});