#!/usr/bin/env node
"use strict";

const assert = require("node:assert");
const fs = require("node:fs");
const os = require("node:os");
const path = require("node:path");
const { spawn } = require("node:child_process");
const { chromium } = require("playwright");
const { findFreePort, waitForGateway } = require("./task114-rust-web-gateway-entry-smoke.js");

const UI_TIMEOUT_MS = Number(process.env.MNOTE_SMOKE_UI_TIMEOUT_MS || 45_000);
const TYPE_DELAY_MS = Number(process.env.MNOTE_SMOKE_TYPE_DELAY_MS || 20);

function buildFixtureEnv(port) {
  return {
    ...process.env,
    MNOTE_WEB_ALLOW_DEV_FIXTURES: "1",
    MNOTE_WEB_BIND: `127.0.0.1:${port}`,
    MNOTE_WEB_PUBLIC_BIND: "127.0.0.1:3000",
    MNOTE_WEB_QUERY_FIXTURES_JSON: JSON.stringify({
      "documents:getMeta": {
        id: "doc_1",
        workspace_id: "ws_demo",
        title: "双栏验收页面",
        updated_at: "2026-05-08T10:00:00Z",
        can_edit: true,
        word_count: 10,
        character_count: 32,
        block_count: 1,
      },
      "documents:getContent": {
        title: "双栏验收页面",
        content: [
          {
            id: "block_1",
            type: "paragraph",
            content: [{ type: "text", text: "fixture init" }],
          },
        ],
        revision: 7,
        conflict_detection_key: "doc_1:7",
        pageSubtree: { rootNodeId: "doc_1", outline: [] },
      },
      "sidebar:datasetList": {
        active_workspace_id: "ws_demo",
        workspaces: [{ id: "ws_demo", name: "双栏空间" }],
        documents: [
          {
            id: "doc_1",
            workspace_id: "ws_demo",
            title: "双栏验收页面",
            parent_id: null,
            sort_order: 0,
            is_starred: false,
            is_template: false,
            created_at: "2026-05-08T10:00:00Z",
            updated_at: "2026-05-08T10:00:00Z",
          },
          {
            id: "doc_other",
            workspace_id: "ws_demo",
            title: "Fixture Other",
            parent_id: null,
            sort_order: 1,
            is_starred: false,
            is_template: false,
            created_at: "2026-05-08T10:00:00Z",
            updated_at: "2026-05-08T10:00:00Z",
          },
        ],
        trashed_documents: [],
        media_assets: [],
        trashed_media_assets: [],
        mindmap_assets: [],
        trashed_mindmap_assets: [],
        table_assets: [],
        trashed_table_assets: [],
        mindmap_docs: [],
        mindmap_asset_children: {},
      },
      "bridgeLogs:listWorkspaceOverview": {
        workspace_id: "ws_demo",
        command_logs: [],
        domain_events: [],
        next_cursor: null,
        has_more: false,
        filters: {
          command_status: null,
          event_status: null,
          target_page_id: null,
          target_block_id: null,
          aggregate_type: null,
          aggregate_id: null,
        },
        generated_at: "2026-05-08T10:00:00Z",
      },
    }),
    MNOTE_WEB_MUTATION_FIXTURES_JSON: JSON.stringify({
      "documents:updateContent": {
        ok: true,
        updated_at: "2026-05-08T10:00:10Z",
        revision: 8,
        conflict_detection_key: "doc_1:8",
      },
      "documents:updateTitle": {
        ok: true,
        title: "双栏验收页面",
      },
    }),
  };
}

function startGateway(port) {
  return spawn("cargo", ["run", "-q", "-p", "mnote-web", "--bin", "mnote-web"], {
    cwd: path.resolve(__dirname, "..", "rust"),
    env: buildFixtureEnv(port),
    stdio: ["ignore", "pipe", "pipe"],
  });
}

function createLocalFolderFixture() {
  const root = fs.mkdtempSync(path.join(os.tmpdir(), "mnote-dual-pane-"));
  const mnoteDir = path.join(root, ".mnote");
  fs.mkdirSync(mnoteDir, { recursive: true });
  fs.writeFileSync(
    path.join(mnoteDir, "workspace.json"),
    JSON.stringify(
      {
        workspaceId: "local-ws:dual-pane-smoke",
        ownerId: "user_real",
        capabilities: ["local_files", "markdown_edit", "asset_upload"],
      },
      null,
      2,
    ),
    "utf8",
  );
  const readmePath = path.join(root, "README.md");
  const sidePath = path.join(root, "side.md");
  const thirdPath = path.join(root, "third.md");
  const readmeParagraphs = Array.from({ length: 80 }, (_, index) => `local init line ${index + 1}`);
  const seed = [
    "---",
    "title: Local Dual Pane",
    "---",
    "",
    ...readmeParagraphs,
    "",
  ].join("\n");
  fs.writeFileSync(readmePath, seed, "utf8");
  fs.writeFileSync(
    sidePath,
    [
      "---",
      "title: Local Side",
      "---",
      "",
      "side init",
      "",
    ].join("\n"),
    "utf8",
  );
  fs.writeFileSync(
    thirdPath,
    [
      "---",
      "title: Local Third",
      "---",
      "",
      "third init",
      "",
    ].join("\n"),
    "utf8",
  );
  return {
    root,
    rootUri: `file://${root}`,
    readmePath,
    sidePath,
    thirdPath,
    documentId: "local-md:README.md",
    sideDocumentId: "local-md:side.md",
    thirdDocumentId: "local-md:third.md",
  };
}

function paneEditorSelector(role) {
  return `.document-pane[data-pane-role="${role}"] .editor-surface .ProseMirror[contenteditable="true"]`;
}

function paneRootSelector(role) {
  return `.document-pane[data-pane-role="${role}"] [data-testid="mnote-leptos-tiptap-island-editor-root"]`;
}

function paneSelector(role) {
  return `.document-pane[data-pane-role="${role}"]`;
}

function paneScrollHostSelector(role) {
  return `.document-main-editor-group[data-pane-role="${role}"]`;
}

async function waitForDualPaneReady(page) {
  await page.waitForFunction(
    ({ primarySelector, secondarySelector, primaryRootSelector, secondaryRootSelector }) => {
      const primaryEditor = document.querySelector(primarySelector);
      const secondaryEditor = document.querySelector(secondarySelector);
      const primaryRoot = document.querySelector(primaryRootSelector);
      const secondaryRoot = document.querySelector(secondaryRootSelector);
      const ready = (editor, root) =>
        editor instanceof HTMLElement &&
        editor.isContentEditable &&
        root instanceof HTMLElement &&
        root.getAttribute("data-runtime-editor-status") !== "error";
      return ready(primaryEditor, primaryRoot) && ready(secondaryEditor, secondaryRoot);
    },
    {
      primarySelector: paneEditorSelector("primary"),
      secondarySelector: paneEditorSelector("secondary"),
      primaryRootSelector: paneRootSelector("primary"),
      secondaryRootSelector: paneRootSelector("secondary"),
    },
    { timeout: UI_TIMEOUT_MS },
  );
}

async function waitForSinglePaneReady(page) {
  await page.waitForFunction(
    ({ primarySelector, primaryRootSelector, secondaryPaneSelector }) => {
      const primaryEditor = document.querySelector(primarySelector);
      const primaryRoot = document.querySelector(primaryRootSelector);
      const secondaryPane = document.querySelector(secondaryPaneSelector);
      const secondaryVisible =
        secondaryPane instanceof HTMLElement &&
        !secondaryPane.hasAttribute("hidden") &&
        secondaryPane.getAttribute("data-pane-visible") !== "false";
      return (
        primaryEditor instanceof HTMLElement &&
        primaryEditor.isContentEditable &&
        primaryRoot instanceof HTMLElement &&
        primaryRoot.getAttribute("data-runtime-editor-status") !== "error" &&
        !secondaryVisible
      );
    },
    {
      primarySelector: paneEditorSelector("primary"),
      primaryRootSelector: paneRootSelector("primary"),
      secondaryPaneSelector: paneSelector("secondary"),
    },
    { timeout: UI_TIMEOUT_MS },
  );
}

async function typePaneText(page, role, text) {
  const editor = page.locator(paneEditorSelector(role)).first();
  await editor.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
  await editor.click({ timeout: UI_TIMEOUT_MS });
  await page.keyboard.press("Control+a");
  await page.keyboard.press("Backspace");
  await page.keyboard.type(text, { delay: TYPE_DELAY_MS });
}

async function appendPaneText(page, role, text) {
  const editor = page.locator(paneEditorSelector(role)).first();
  await editor.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
  await editor.click({ timeout: UI_TIMEOUT_MS });
  await page.keyboard.press("Control+End");
  await page.keyboard.type(text, { delay: TYPE_DELAY_MS });
}

async function waitForPaneText(page, role, text) {
  await page.waitForFunction(
    ({ selector, expected }) => {
      const editor = document.querySelector(selector);
      return (editor?.textContent || "").includes(expected);
    },
    {
      selector: paneEditorSelector(role),
      expected: text,
    },
    { timeout: UI_TIMEOUT_MS },
  );
}

async function readPrimaryTitleState(page) {
  return await page.evaluate(() => {
    const primaryInput = document.querySelector('.document-pane[data-pane-role="primary"] [data-page-title-input="true"]');
    const primaryMeta = document.querySelector('.document-pane[data-pane-role="primary"] [data-page-title-current="true"]');
    const breadcrumb = document.querySelector('.wolai-breadcrumb-current [data-page-title-current="true"]');
    return {
      documentTitle: document.title || "",
      inputValue: primaryInput instanceof HTMLTextAreaElement ? primaryInput.value || "" : "",
      metaTitle: primaryMeta instanceof HTMLElement ? primaryMeta.textContent || "" : "",
      breadcrumbTitle: breadcrumb instanceof HTMLElement ? breadcrumb.textContent || "" : "",
    };
  });
}

async function waitForPaneStatus(page, role, status) {
  await page.waitForFunction(
    ({ selector, expected }) => {
      const root = document.querySelector(selector);
      return root?.getAttribute("data-runtime-editor-status") === expected;
    },
    {
      selector: paneRootSelector(role),
      expected: status,
    },
    { timeout: UI_TIMEOUT_MS },
  );
}

async function waitForPaneStatusWithSnapshot(page, role, status, label) {
  try {
    await waitForPaneStatus(page, role, status);
  } catch (error) {
    const snapshot = await readDocumentSessionSnapshot(page).catch((snapshotError) => ({
      error: snapshotError && snapshotError.stack ? snapshotError.stack : String(snapshotError),
    }));
    const paneState = await page.evaluate(({ rootSelector, paneSelector }) => {
      const root = document.querySelector(rootSelector);
      const pane = document.querySelector(paneSelector);
      return {
        status: root?.getAttribute("data-runtime-editor-status") || "",
        error: root?.getAttribute("data-runtime-editor-error") || "",
        panelText: pane?.querySelector('[data-testid="mnote-editor-conflict-panel"]')?.textContent || "",
      };
    }, {
      rootSelector: paneRootSelector(role),
      paneSelector: paneSelector(role),
    }).catch((stateError) => ({
      error: stateError && stateError.stack ? stateError.stack : String(stateError),
    }));
    throw new Error(`${label} 等待 ${role}=${status} 失败: pane=${JSON.stringify(paneState)} sessions=${JSON.stringify(snapshot)}`, { cause: error });
  }
}

async function readPaneText(page, role) {
  return await page.evaluate((selector) => {
    const editor = document.querySelector(selector);
    return editor?.textContent || "";
  }, paneEditorSelector(role));
}

async function readActivePaneRole(page) {
  return await page.evaluate(() => {
    const active = document.activeElement;
    return active?.closest?.(".document-pane")?.getAttribute?.("data-pane-role") || null;
  });
}

async function readPaneScrollState(page, role) {
  return await page.evaluate(({ scrollHostSelector, editorSelector }) => {
    const scrollHost = document.querySelector(scrollHostSelector);
    const editor = document.querySelector(editorSelector);
    const findScrollable = (start, boundary) => {
      let current = start;
      while (current instanceof HTMLElement) {
        const overflowY = window.getComputedStyle(current).overflowY;
        if (current.scrollHeight > current.clientHeight + 8 && /auto|scroll|overlay/.test(overflowY)) {
          return current;
        }
        if (current === boundary) {
          break;
        }
        current = current.parentElement;
      }
      return null;
    };
    const target = scrollHost instanceof HTMLElement ? (findScrollable(editor, scrollHost) || findScrollable(scrollHost, scrollHost)) : null;
    if (!(target instanceof HTMLElement)) {
      return null;
    }
    return {
      scrollTop: target.scrollTop,
      scrollHeight: target.scrollHeight,
      clientHeight: target.clientHeight,
    };
  }, {
    scrollHostSelector: paneScrollHostSelector(role),
    editorSelector: paneEditorSelector(role),
  });
}

async function setPaneScrollTop(page, role, top) {
  return await page.evaluate(({ scrollHostSelector, editorSelector, topValue }) => {
    const scrollHost = document.querySelector(scrollHostSelector);
    const editor = document.querySelector(editorSelector);
    const findScrollable = (start, boundary) => {
      let current = start;
      while (current instanceof HTMLElement) {
        const overflowY = window.getComputedStyle(current).overflowY;
        if (current.scrollHeight > current.clientHeight + 8 && /auto|scroll|overlay/.test(overflowY)) {
          return current;
        }
        if (current === boundary) {
          break;
        }
        current = current.parentElement;
      }
      return null;
    };
    const target = scrollHost instanceof HTMLElement ? (findScrollable(editor, scrollHost) || findScrollable(scrollHost, scrollHost)) : null;
    if (!(target instanceof HTMLElement)) {
      return null;
    }
    target.scrollTop = topValue;
    return {
      scrollTop: target.scrollTop,
      scrollHeight: target.scrollHeight,
      clientHeight: target.clientHeight,
    };
  }, {
    scrollHostSelector: paneScrollHostSelector(role),
    editorSelector: paneEditorSelector(role),
    topValue: top,
  });
}

async function readViewportScroll(page) {
  return await page.evaluate(() => ({ x: window.scrollX, y: window.scrollY }));
}

async function setViewportScroll(page, top) {
  return await page.evaluate((topValue) => {
    window.scrollTo({ top: topValue, left: 0, behavior: "auto" });
    return { x: window.scrollX, y: window.scrollY };
  }, top);
}

async function clickSidebarRowOpen(page, text) {
  const row = page.getByTestId("wolai-sidebar-row").filter({ hasText: text }).first();
  await row.locator(".tree-link").first().click({ timeout: UI_TIMEOUT_MS });
}

async function waitForRequestCount(requests, startIndex, predicate, expected, label) {
  const deadline = Date.now() + UI_TIMEOUT_MS;
  while (Date.now() < deadline) {
    const count = requests.slice(startIndex).filter(predicate).length;
    if (count >= expected) {
      return count;
    }
    await new Promise((resolve) => setTimeout(resolve, 100));
  }
  throw new Error(`${label} 超时，期望至少 ${expected} 条`);
}

async function readDocumentSessionSnapshot(page) {
  return await page.evaluate(() => {
    const debug = window.__mnoteDebugDocumentSessions;
    if (!debug || typeof debug.snapshot !== "function") {
      throw new Error("缺少文档 session debug 快照");
    }
    return debug.snapshot();
  });
}

async function waitForTreeLiveConnected(page, label) {
  await page.waitForFunction(
    () => document.documentElement.getAttribute("data-mnote-tree-live-status") === "connected",
    {},
    { timeout: UI_TIMEOUT_MS },
  );
  const snapshot = await readTreeLiveSnapshot(page);
  assert(snapshot.transport, `${label} 应暴露 tree live transport`);
  assert(snapshot.sourceKind, `${label} 应持有 tree live source`);
  return snapshot;
}

async function readTreeLiveSnapshot(page) {
  return await page.evaluate(() => {
    const source = window.__mnoteTreeLiveEventSource || null;
    if (!window.__mnoteSmokeTreeLiveSourceIds) {
      window.__mnoteSmokeTreeLiveSourceIds = new WeakMap();
      window.__mnoteSmokeTreeLiveNextSourceId = 1;
    }
    let sourceId = "";
    if (source && typeof source === "object") {
      if (!window.__mnoteSmokeTreeLiveSourceIds.has(source)) {
        window.__mnoteSmokeTreeLiveSourceIds.set(source, window.__mnoteSmokeTreeLiveNextSourceId++);
      }
      sourceId = String(window.__mnoteSmokeTreeLiveSourceIds.get(source) || "");
    }
    return {
      status: document.documentElement.getAttribute("data-mnote-tree-live-status") || "",
      transport: document.documentElement.getAttribute("data-mnote-tree-live-transport") || "",
      sourceKind: source
        ? (typeof WebSocket !== "undefined" && source instanceof WebSocket
          ? "websocket"
          : (typeof EventSource !== "undefined" && source instanceof EventSource ? "eventsource" : "unknown"))
        : "",
      sourceId,
      url: source && typeof source.url === "string" ? source.url : "",
      readyState: source && typeof source.readyState === "number" ? source.readyState : null,
    };
  });
}

function requestUrl(record) {
  try {
    return new URL(record.url);
  } catch {
    return null;
  }
}

function summarizeLocalFolderEventRequests(requests, startIndex) {
  const summary = {
    total: 0,
    documentChannel: 0,
    treeLive: 0,
    byRootUri: {},
  };
  for (const record of requests.slice(startIndex)) {
    if (record.method !== "GET" || !record.url.includes("/api/local-folder/events")) continue;
    const url = requestUrl(record);
    const rootUri = url?.searchParams.get("rootUri") || "";
    const phase = url?.searchParams.get("treeLive") === "true" ? "treeLive" : "documentChannel";
    summary.total += 1;
    summary[phase] += 1;
    if (!summary.byRootUri[rootUri]) {
      summary.byRootUri[rootUri] = { total: 0, documentChannel: 0, treeLive: 0 };
    }
    summary.byRootUri[rootUri].total += 1;
    summary.byRootUri[rootUri][phase] += 1;
  }
  return summary;
}

function recordLocalFolderEventDiagnostics(diagnostics, label, requests, startIndex, snapshot) {
  diagnostics.localFolderEventPhases.push({
    label,
    requests: summarizeLocalFolderEventRequests(requests, startIndex),
    snapshot,
  });
}

async function waitForLocalFolderChannelCount(page, expected, label) {
  const deadline = Date.now() + UI_TIMEOUT_MS;
  let snapshot = null;
  while (Date.now() < deadline) {
    snapshot = await readDocumentSessionSnapshot(page);
    if (snapshot.localFolderChannelCount === expected) {
      return snapshot;
    }
    await new Promise((resolve) => setTimeout(resolve, 100));
  }
  assert.equal(snapshot?.localFolderChannelCount, expected, label);
  return snapshot;
}

async function readNoReloadProbe(page) {
  return await page.evaluate(({ primaryRootSelector, secondaryRootSelector }) => ({
    pagehideCount: Number(window.sessionStorage?.getItem("__mnoteSmokePagehideCount") || "0"),
    primaryMountId: document.querySelector(primaryRootSelector)?.getAttribute("data-runtime-mount-id") || "",
    secondaryMountId: document.querySelector(secondaryRootSelector)?.getAttribute("data-runtime-mount-id") || "",
  }), {
    primaryRootSelector: paneRootSelector("primary"),
    secondaryRootSelector: paneRootSelector("secondary"),
  });
}

async function waitForDocumentPath(page, documentId) {
  await page.waitForFunction(
    (expectedDocumentId) => decodeURIComponent(window.location.pathname).endsWith(`/documents/${expectedDocumentId}`),
    documentId,
    { timeout: UI_TIMEOUT_MS },
  );
}

function countRequests(requests, startIndex, predicate) {
  return requests.slice(startIndex).filter(predicate).length;
}

function isSaveRequest(record) {
  return record.method === "POST"
    && (record.url.includes("/api/documents/save") || record.url.includes("/api/page-body/write"));
}

function isTreeEventRequest(record) {
  return (record.method === "GET" && record.url.includes("/api/tree/events"))
    || (record.method === "WS" && record.url.includes("/api/realtime/ws"));
}

function isLocalFolderEventRequest(record) {
  if (record.method !== "GET" || !record.url.includes("/api/local-folder/events")) return false;
  try {
    const url = new URL(record.url);
    return url.searchParams.get("treeLive") !== "true";
  } catch {
    return !record.url.includes("treeLive=true");
  }
}

async function runFixturePhase(page, baseUrl, requests) {
  const url = `${baseUrl}/documents/doc_1?workspaceId=ws_demo&secondaryDocumentId=doc_1`;
  await page.goto(url, { waitUntil: "domcontentloaded", timeout: UI_TIMEOUT_MS });
  await waitForDualPaneReady(page);
  await waitForTreeLiveConnected(page, "fixture tree live 建连");
  await page.waitForTimeout(800);

  const closeButton = page.locator('[data-mnote-pane-close="secondary"]').first();
  await closeButton.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });

  const primaryToSecondary = `fixture-primary-${Date.now().toString().slice(-6)}`;
  const primarySaveIndex = requests.length;
  await typePaneText(page, "primary", primaryToSecondary);
  await waitForPaneText(page, "primary", primaryToSecondary);
  await waitForPaneText(page, "secondary", primaryToSecondary);
  await waitForPaneStatusWithSnapshot(page, "primary", "saved", "cross-doc primary save");
  await waitForPaneStatusWithSnapshot(page, "secondary", "saved", "cross-doc secondary save");
  await page.waitForTimeout(800);
  assert.equal(countRequests(requests, primarySaveIndex, isSaveRequest), 1, "同 session 双 view 主 pane 输入后应只触发一次保存请求");
  assert.equal(await readActivePaneRole(page), "primary", "primary 输入后焦点不应被同步到 secondary");

  const secondaryToPrimary = `fixture-secondary-${(Date.now() + 1).toString().slice(-6)}`;
  const secondarySaveIndex = requests.length;
  await typePaneText(page, "secondary", secondaryToPrimary);
  await waitForPaneText(page, "primary", secondaryToPrimary);
  await waitForPaneText(page, "secondary", secondaryToPrimary);
  await waitForPaneStatusWithSnapshot(page, "primary", "saved", "different-doc primary save");
  await waitForPaneStatusWithSnapshot(page, "secondary", "saved", "different-doc secondary save");
  await page.waitForTimeout(800);
  assert.equal(countRequests(requests, secondarySaveIndex, isSaveRequest), 1, "同 session 双 view 次 pane 输入后应只触发一次保存请求");
  assert.equal(await readActivePaneRole(page), "secondary", "secondary 输入后焦点不应被同步到 primary");

  await page.reload({ waitUntil: "domcontentloaded", timeout: UI_TIMEOUT_MS });
  await waitForDualPaneReady(page);
  await waitForTreeLiveConnected(page, "reload 后 tree live 建连");
  await page.waitForTimeout(800);
  const fixtureSnapshot = await readDocumentSessionSnapshot(page);
  assert.equal(fixtureSnapshot.sessionCount, 1, "同文档双开时应只复用一个 session");
  assert.equal(fixtureSnapshot.sessions[0]?.viewCount, 2, "同文档双开时单 session 应挂两个 view");

  const beforeFixtureNavigation = await readNoReloadProbe(page);
  const beforeTreeLiveNavigation = await readTreeLiveSnapshot(page);
  assert(beforeFixtureNavigation.secondaryMountId, "fixture 导航前应已挂载 secondary editor");
  await clickSidebarRowOpen(page, "Fixture Other");
  await waitForDocumentPath(page, "doc_other");
  await waitForDualPaneReady(page);
  await page.waitForTimeout(800);
  const afterFixtureNavigation = await readNoReloadProbe(page);
  assert.equal(
    afterFixtureNavigation.pagehideCount,
    beforeFixtureNavigation.pagehideCount,
    "fixture sidebar 导航不应触发整页 pagehide",
  );
  assert.equal(
    afterFixtureNavigation.secondaryMountId,
    beforeFixtureNavigation.secondaryMountId,
    "fixture sidebar 导航不应重挂 secondary editor",
  );
  const afterTreeLiveNavigation = await readTreeLiveSnapshot(page);
  assert.equal(
    afterTreeLiveNavigation.sourceId,
    beforeTreeLiveNavigation.sourceId,
    "fixture sidebar 导航不应重建 tree live source",
  );
  const navigatedFixtureUrl = new URL(page.url());
  assert.equal(
    navigatedFixtureUrl.searchParams.get("secondaryDocumentId"),
    "doc_1",
    "fixture sidebar 导航后 secondaryDocumentId 应保持原值",
  );
}

async function runLocalFolderPhase(page, baseUrl, requests, fixture, diagnostics) {
  const differentDocUrl = `${baseUrl}/documents/${encodeURIComponent(fixture.documentId)}?sourceKind=local_folder&rootUri=${encodeURIComponent(fixture.rootUri)}&secondaryDocumentId=${encodeURIComponent(fixture.sideDocumentId)}&secondarySourceKind=local_folder&secondaryRootUri=${encodeURIComponent(fixture.rootUri)}`;
  const differentDocIndex = requests.length;
  await page.goto(differentDocUrl, { waitUntil: "domcontentloaded", timeout: UI_TIMEOUT_MS });
  await waitForDualPaneReady(page);
  await page.waitForTimeout(800);
  const differentDocSnapshot = await waitForLocalFolderChannelCount(
    page,
    1,
    "同 rootUri 不同文档双开时应只复用一个 local-folder channel",
  );
  recordLocalFolderEventDiagnostics(diagnostics, "different-doc-open", requests, differentDocIndex, differentDocSnapshot);
  assert.equal(differentDocSnapshot.sessionCount, 2, "不同文档双开时应建立两个 session");
  assert.equal(differentDocSnapshot.localFolderChannelCount, 1, "同 rootUri 不同文档双开时应只复用一个 local-folder channel");
  assert.deepEqual(
    differentDocSnapshot.sessions.map((item) => item.documentId).sort(),
    [fixture.documentId, fixture.sideDocumentId].sort(),
    "不同文档双开时 session 应分别归属到两个 documentId",
  );

  const crossDocPrimaryText = `cross-doc-primary-${Date.now().toString().slice(-6)}`;
  const crossDocSecondaryText = `cross-doc-secondary-${(Date.now() + 1).toString().slice(-6)}`;
  const crossDocPrimarySaveIndex = requests.length;
  await typePaneText(page, "primary", crossDocPrimaryText);
  await waitForPaneText(page, "primary", crossDocPrimaryText);
  await waitForPaneStatusWithSnapshot(page, "primary", "saved", "same-doc primary save");
  await page.waitForTimeout(800);
  assert.equal(
    countRequests(requests, crossDocPrimarySaveIndex, isSaveRequest),
    1,
    "同 rootUri 不同文档时 primary pane 输入后应只触发一次保存请求",
  );
  const afterPrimaryCrossDocSnapshot = await readDocumentSessionSnapshot(page);
  const afterPrimarySecondarySession = afterPrimaryCrossDocSnapshot.sessions.find((item) => item.documentId === fixture.sideDocumentId);
  assert(afterPrimarySecondarySession, "primary save 后 secondary session 应存在");
  assert.equal(
    afterPrimarySecondarySession.status,
    "saved",
    `primary save 后 secondary session 不应被误判冲突: ${JSON.stringify(afterPrimarySecondarySession)}`,
  );

  const crossDocSecondarySaveIndex = requests.length;
  await typePaneText(page, "secondary", crossDocSecondaryText);
  await waitForPaneText(page, "secondary", crossDocSecondaryText);
  await waitForPaneStatusWithSnapshot(page, "secondary", "saved", "same-doc secondary save");
  await page.waitForTimeout(800);
  assert.equal(
    countRequests(requests, crossDocSecondarySaveIndex, isSaveRequest),
    1,
    "同 rootUri 不同文档时 secondary pane 输入后应只触发一次保存请求",
  );

  const crossDocSnapshot = await readDocumentSessionSnapshot(page);
  const primarySession = crossDocSnapshot.sessions.find((item) => item.documentId === fixture.documentId);
  const secondarySession = crossDocSnapshot.sessions.find((item) => item.documentId === fixture.sideDocumentId);
  assert(primarySession, "cross-doc primary session 应存在");
  assert(secondarySession, "cross-doc secondary session 应存在");
  assert.equal(primarySession.status, "saved", `cross-doc primary session 不应进入冲突态: ${JSON.stringify(primarySession)}`);
  assert.notEqual(secondarySession.status, "external-change-conflict", `cross-doc secondary session 不应进入冲突态: ${JSON.stringify(secondarySession)}`);
  assert.notEqual(secondarySession.dirtyState, "ExternalModified", `cross-doc secondary session 不应被误判为外部修改: ${JSON.stringify(secondarySession)}`);

  await clickSidebarRowOpen(page, "Local Third");
  await waitForDocumentPath(page, fixture.thirdDocumentId);
  await waitForDualPaneReady(page);
  const navigatedUrl = new URL(page.url());
  assert.equal(
    navigatedUrl.searchParams.get("secondaryDocumentId"),
    fixture.sideDocumentId,
    "左侧普通导航后 secondaryDocumentId 应保持原值",
  );
  assert.equal(
    navigatedUrl.searchParams.get("secondarySourceKind"),
    "local_folder",
    "左侧普通导航后 secondarySourceKind 应保持 local_folder",
  );
  assert.equal(
    navigatedUrl.searchParams.get("secondaryRootUri"),
    fixture.rootUri,
    "左侧普通导航后 secondaryRootUri 应保持原值",
  );
  const primaryTextAfterNavigation = await readPaneText(page, "primary");
  const secondaryTextAfterNavigation = await readPaneText(page, "secondary");
  assert(primaryTextAfterNavigation.includes("third init"), "左侧普通导航后 primary pane 应切到新文档");
  assert(secondaryTextAfterNavigation.includes("side init"), "左侧普通导航后 secondary pane 应保持原文档");
  const topbarTitle = await page.locator(".wolai-topbar [data-page-title-current='true']").first().textContent();
  assert((topbarTitle || "").includes("Local Third"), "左侧普通导航后共享 topbar 标题应切到 primary 文档");
  const activeThirdRow = page.getByTestId("wolai-sidebar-row").filter({ hasText: "Local Third" }).first();
  const activeState = await activeThirdRow.getAttribute("data-active");
  const selectedState = await activeThirdRow.getAttribute("data-selected");
  assert(
    activeState === "true" || selectedState === "true",
    "左侧普通导航后共享侧栏 active/selected 状态应切到新的 primary 文档",
  );

  const url = `${baseUrl}/documents/${encodeURIComponent(fixture.documentId)}?sourceKind=local_folder&rootUri=${encodeURIComponent(fixture.rootUri)}&secondaryDocumentId=${encodeURIComponent(fixture.documentId)}&secondarySourceKind=local_folder&secondaryRootUri=${encodeURIComponent(fixture.rootUri)}`;

  const openIndex = requests.length;
  await page.goto(url, { waitUntil: "domcontentloaded", timeout: UI_TIMEOUT_MS });
  await waitForDualPaneReady(page);
  await page.waitForTimeout(800);
  const sameDocOpenSnapshot = await waitForLocalFolderChannelCount(page, 1, "同 rootUri 双 pane 应只保留一个 local-folder channel");
  recordLocalFolderEventDiagnostics(diagnostics, "same-doc-open", requests, openIndex, sameDocOpenSnapshot);
  assert.equal(countRequests(requests, openIndex, isTreeEventRequest), 0, "local folder 页面不应建立 tree EventSource");

  const reloadIndex = requests.length;
  await page.reload({ waitUntil: "domcontentloaded", timeout: UI_TIMEOUT_MS });
  await waitForDualPaneReady(page);
  await page.waitForTimeout(800);
  const sameDocSnapshot = await waitForLocalFolderChannelCount(page, 1, "reload 后同 rootUri 双 pane 仍应只保留一个 local-folder channel");
  recordLocalFolderEventDiagnostics(diagnostics, "same-doc-reload", requests, reloadIndex, sameDocSnapshot);
  assert.equal(sameDocSnapshot.sessionCount, 1, "同文档 local folder 双开时应只复用一个 session");
  assert.equal(sameDocSnapshot.sessions[0]?.viewCount, 2, "同文档 local folder 双开时单 session 应挂两个 view");

  const primaryScrollBefore = await readPaneScrollState(page, "primary");
  const secondaryScrollBefore = await readPaneScrollState(page, "secondary");
  assert(primaryScrollBefore && primaryScrollBefore.scrollHeight > primaryScrollBefore.clientHeight, `primary pane 应有独立滚动容器: ${JSON.stringify(primaryScrollBefore)}`);
  assert(secondaryScrollBefore && secondaryScrollBefore.scrollHeight > secondaryScrollBefore.clientHeight, `secondary pane 应有独立滚动容器: ${JSON.stringify(secondaryScrollBefore)}`);
  const primaryScrollAfter = await setPaneScrollTop(page, "primary", 260);
  const secondaryScrollAfter = await setPaneScrollTop(page, "secondary", 40);
  assert((primaryScrollAfter?.scrollTop || 0) > 120, `primary pane 内滚动应生效: ${JSON.stringify(primaryScrollAfter)}`);
  assert((secondaryScrollAfter?.scrollTop || 0) < 120, `secondary pane 内滚动应独立于 primary: ${JSON.stringify(secondaryScrollAfter)}`);
  const primaryScrollFinal = await readPaneScrollState(page, "primary");
  assert((primaryScrollFinal?.scrollTop || 0) > 120, `secondary pane 滚动不应重置 primary pane: ${JSON.stringify(primaryScrollFinal)}`);
  const primaryScrollBeforeSync = primaryScrollFinal;
  const secondaryScrollBeforeSync = await readPaneScrollState(page, "secondary");

  const externalText = `external-sync-${Date.now().toString().slice(-6)}`;
  fs.writeFileSync(
    fixture.readmePath,
    [
      "---",
      "title: Local Dual Pane",
      "---",
      "",
      ...Array.from({ length: 80 }, (_, index) => `local init line ${index + 1}`),
      externalText,
      "",
    ].join("\n"),
    "utf8",
  );
  await waitForPaneText(page, "primary", externalText);
  await waitForPaneText(page, "secondary", externalText);
  await waitForPaneStatus(page, "primary", "synced-external-change");
  await waitForPaneStatus(page, "secondary", "synced-external-change");
  await page.waitForTimeout(800);
  const primaryScrollAfterSync = await readPaneScrollState(page, "primary");
  const secondaryScrollAfterSync = await readPaneScrollState(page, "secondary");
  assert(
    Math.abs((primaryScrollAfterSync?.scrollTop || 0) - (primaryScrollBeforeSync?.scrollTop || 0)) < 40,
    `远端 replaceContent 后 primary pane 滚动不应被重置: before=${JSON.stringify(primaryScrollBeforeSync)} after=${JSON.stringify(primaryScrollAfterSync)}`,
  );
  assert(
    Math.abs((secondaryScrollAfterSync?.scrollTop || 0) - (secondaryScrollBeforeSync?.scrollTop || 0)) < 40,
    `远端 replaceContent 后 secondary pane 滚动不应被重置: before=${JSON.stringify(secondaryScrollBeforeSync)} after=${JSON.stringify(secondaryScrollAfterSync)}`,
  );

  const savedMarkdown = fs.readFileSync(fixture.readmePath, "utf8");
  assert(savedMarkdown.includes(externalText), "外部写盘未落到本地 Markdown 文件");

  const closeBefore = await readNoReloadProbe(page);
  await page.locator('[data-mnote-pane-close="secondary"]').first().click({ timeout: UI_TIMEOUT_MS });
  await page.waitForFunction(() => !new URL(window.location.href).searchParams.has("secondaryDocumentId"), {}, { timeout: UI_TIMEOUT_MS });
  await waitForSinglePaneReady(page);
  const closeAfter = await readNoReloadProbe(page);
  assert.equal(closeAfter.pagehideCount, closeBefore.pagehideCount, "关闭 secondary 不应触发整页 pagehide");
  await page.reload({ waitUntil: "domcontentloaded", timeout: UI_TIMEOUT_MS });
  await waitForSinglePaneReady(page);
  const finalUrl = new URL(page.url());
  assert(!finalUrl.searchParams.has("secondaryDocumentId"), "关闭 secondary 后 reload 不应恢复 secondaryDocumentId");
  assert(!finalUrl.searchParams.has("secondarySourceKind"), "关闭 secondary 后 reload 不应恢复 secondarySourceKind");
  assert(!finalUrl.searchParams.has("secondaryRootUri"), "关闭 secondary 后 reload 不应恢复 secondaryRootUri");

  await page.goto(url, { waitUntil: "domcontentloaded", timeout: UI_TIMEOUT_MS });
  await waitForDualPaneReady(page);
  await page.evaluate(() => {
    document.querySelector('.document-pane[data-pane-role="secondary"]')?.remove();
  });
  await page.waitForTimeout(300);
  const oneViewSnapshot = await readDocumentSessionSnapshot(page);
  assert.equal(oneViewSnapshot.sessionCount, 1, "移除一个 pane 后 session 不应提前释放");
  assert.equal(oneViewSnapshot.sessions[0]?.viewCount, 1, "移除一个 pane 后同 session 应只剩一个 view");
  await page.evaluate(() => {
    document.querySelector('.document-pane[data-pane-role="primary"]')?.remove();
  });
  await page.waitForTimeout(1500);
  const releasedSnapshot = await readDocumentSessionSnapshot(page);
  assert.equal(releasedSnapshot.sessionCount, 0, "最后一个 view 卸载后应延迟释放 session");
  assert.equal(releasedSnapshot.localFolderChannelCount, 0, "最后一个 view 卸载后应回收 local-folder channel");
}

async function runSinglePaneTitlePhase(page, baseUrl, fixture) {
  const url = `${baseUrl}/documents/${encodeURIComponent(fixture.documentId)}?sourceKind=local_folder&rootUri=${encodeURIComponent(fixture.rootUri)}`;
  await page.goto(url, { waitUntil: "domcontentloaded", timeout: UI_TIMEOUT_MS });
  await waitForSinglePaneReady(page);
  const expectedTitle = "Local Dual Pane";
  const beforeClick = await readPrimaryTitleState(page);
  assert.equal(beforeClick.documentTitle.trim(), expectedTitle, "单页本地文档首屏 document.title 不应被隐藏 secondary 覆盖成“无标题”");
  assert.equal(beforeClick.inputValue.trim(), expectedTitle, "单页本地文档首屏标题输入框不应被隐藏 secondary 覆盖成“无标题”");
  assert.equal(beforeClick.metaTitle.trim(), expectedTitle, "单页本地文档首屏页头标题不应被隐藏 secondary 覆盖成“无标题”");
  assert.equal(beforeClick.breadcrumbTitle.trim(), expectedTitle, "单页本地文档首屏 breadcrumb 标题不应被隐藏 secondary 覆盖成“无标题”");

  const titleInput = page.locator('.document-pane[data-pane-role="primary"] [data-page-title-input="true"]').first();
  await titleInput.click({ timeout: UI_TIMEOUT_MS });
  await page.waitForTimeout(250);
  const afterClick = await readPrimaryTitleState(page);
  assert.equal(afterClick.documentTitle.trim(), expectedTitle, "点击标题后 document.title 不应闪成“无标题”");
  assert.equal(afterClick.inputValue.trim(), expectedTitle, "点击标题后输入框标题不应闪成“无标题”");
  assert.equal(afterClick.metaTitle.trim(), expectedTitle, "点击标题后页头标题不应闪成“无标题”");
  assert.equal(afterClick.breadcrumbTitle.trim(), expectedTitle, "点击标题后 breadcrumb 标题不应闪成“无标题”");

  const beforeOpenRight = await readNoReloadProbe(page);
  assert(beforeOpenRight.primaryMountId, "打开 secondary 前应已挂载 primary editor");
  await page.evaluate((documentId) => {
    window.dispatchEvent(new CustomEvent("tree.page.open-right", { detail: { documentId } }));
  }, fixture.sideDocumentId);
  await page.waitForFunction(() => new URL(window.location.href).searchParams.has("secondaryDocumentId"), {}, { timeout: UI_TIMEOUT_MS });
  await waitForDualPaneReady(page);
  const afterOpenRight = await readNoReloadProbe(page);
  assert.equal(afterOpenRight.pagehideCount, beforeOpenRight.pagehideCount, "打开 secondary 不应触发整页 pagehide");
  assert.equal(afterOpenRight.primaryMountId, beforeOpenRight.primaryMountId, "打开 secondary 不应重挂 primary editor");
  const openRightUrl = new URL(page.url());
  assert.equal(openRightUrl.searchParams.get("secondaryDocumentId"), fixture.sideDocumentId, "打开 secondary 后 URL 应写入 secondaryDocumentId");
  assert.equal(openRightUrl.searchParams.get("secondarySourceKind"), "local_folder", "打开 secondary 后 URL 应保留 secondarySourceKind");
  assert.equal(openRightUrl.searchParams.get("secondaryRootUri"), fixture.rootUri, "打开 secondary 后 URL 应保留 secondaryRootUri");
}

async function main() {
  const externalBaseUrl = String(process.env.MNOTE_UI_BASE_URL || "").trim();
  const useExistingServer = externalBaseUrl.length > 0;
  const port = useExistingServer ? null : await findFreePort();
  const baseUrl = useExistingServer ? externalBaseUrl : `http://127.0.0.1:${port}`;
  const gateway = useExistingServer ? null : startGateway(port);
  const localFixture = createLocalFolderFixture();
  const requests = [];
  const diagnostics = { localFolderEventPhases: [] };
  let stderr = "";
  let stdout = "";

  gateway?.stderr.on("data", (chunk) => {
    stderr += chunk.toString("utf8");
  });
  gateway?.stdout.on("data", (chunk) => {
    stdout += chunk.toString("utf8");
  });

  await waitForGateway(baseUrl);

  const browser = await chromium.launch({ headless: true });
  const context = await browser.newContext({
    viewport: { width: 1440, height: 960 },
    locale: "zh-CN",
    extraHTTPHeaders: {
      "x-mnote-actor-id": "user_real",
      "x-mnote-actor-type": "user",
    },
  });
  await context.addInitScript(() => {
    const key = "__mnoteSmokePagehideCount";
    window.addEventListener("pagehide", () => {
      const current = Number(window.sessionStorage?.getItem(key) || "0");
      window.sessionStorage?.setItem(key, String(current + 1));
    });
  });
  const page = await context.newPage();

  page.on("request", (request) => {
    let payload = null;
    try {
      payload = request.postDataJSON?.() ?? null;
    } catch {
      payload = null;
    }
    requests.push({
      url: request.url(),
      method: request.method(),
      payload,
    });
  });

  page.on("websocket", (socket) => {
    requests.push({
      url: socket.url(),
      method: "WS",
      payload: null,
    });
  });

  let caughtError = null;
  try {
    if (!useExistingServer) {
      await runFixturePhase(page, baseUrl, requests);
    }
    await runLocalFolderPhase(page, baseUrl, requests, localFixture, diagnostics);
    await runSinglePaneTitlePhase(page, baseUrl, localFixture);
    console.log(
      JSON.stringify(
        {
          ok: true,
          task: "task165-rust-web-dual-pane-smoke",
          baseUrl,
          serverMode: useExistingServer ? "existing" : "spawned",
          requestSummary: {
            saveRequests: requests.filter(isSaveRequest).length,
            treeEventRequests: requests.filter(isTreeEventRequest).length,
            localFolderEventRequests: requests.filter(isLocalFolderEventRequest).length,
          },
          diagnostics,
        },
        null,
        2,
      ),
    );
  } catch (error) {
    caughtError = error;
  } finally {
    await page.close().catch(() => undefined);
    await context.close().catch(() => undefined);
    await browser.close().catch(() => undefined);
    gateway?.kill("SIGTERM");
    if (gateway) {
      setTimeout(() => {
        if (!gateway.killed) {
          gateway.kill("SIGKILL");
        }
      }, 2000).unref();
    }
    fs.rmSync(localFixture.root, { recursive: true, force: true });
    if (caughtError) {
      const debug = [stdout.trim(), stderr.trim()].filter(Boolean).join("\n");
      if (debug) {
        process.stderr.write(`${debug}\n`);
      }
    }
  }

  if (caughtError) {
    throw caughtError;
  }
}

if (require.main === module) {
  main().catch((error) => {
    console.error(error instanceof Error ? error.stack || error.message : String(error));
    process.exit(1);
  });
}