"use strict";

// 说明：
// - 这是 task-019 的最小真实浏览器回归脚本。
// - 目标只覆盖文档页元信息、Sidebar、BlockNote 保存链，不扩大到 Mindmap / OnlyOffice。
// - 脚本会先创建一篇临时页面，完成回归后再彻底删除，避免污染现有数据。

const { chromium } = require("playwright");

const BASE_URL = process.env.MNOTE_UI_BASE_URL || "http://127.0.0.1:3000";
const REQUEST_TIMEOUT_MS = 20_000;
const UI_TIMEOUT_MS = 30_000;

function assert(condition, message) {
  if (!condition) {
    throw new Error(message);
  }
}

async function requestJson(path, init = {}) {
  const response = await fetch(`${BASE_URL}${path}`, {
    ...init,
    headers: {
      "content-type": "application/json",
      ...(init.headers || {}),
    },
  });

  const text = await response.text();
  let payload = null;
  try {
    payload = text ? JSON.parse(text) : null;
  } catch {
    payload = text;
  }

  if (!response.ok) {
    throw new Error(
      `${path} 请求失败: ${response.status} ${response.statusText} ${typeof payload === "string" ? payload : JSON.stringify(payload)}`,
    );
  }

  return payload;
}

async function createTempDocument() {
  const payload = await requestJson("/api/documents/create", {
    method: "POST",
    body: JSON.stringify({ parentId: null }),
  });

  assert(payload && typeof payload.id === "string", "创建临时页面失败：缺少 id");
  assert(payload && typeof payload.workspace_id === "string", "创建临时页面失败：缺少 workspace_id");

  return {
    documentId: payload.id,
    workspaceId: payload.workspace_id,
  };
}

async function purgeTempDocument(documentId) {
  await requestJson("/api/documents/purge", {
    method: "POST",
    body: JSON.stringify({ documentId }),
  });
}

async function runBrowserRegression(target) {
  const uniqueSuffix = Date.now().toString();
  const nextTitle = `task019-ui-${uniqueSuffix}`;
  const nextBody = `task019 正文保存回归 ${uniqueSuffix}`;
  const browser = await chromium.launch({ headless: true });
  const page = await browser.newPage({
    viewport: { width: 1440, height: 960 },
  });

  try {
    const documentUrl = `${BASE_URL}/documents/${target.documentId}?workspaceId=${encodeURIComponent(target.workspaceId)}`;
    await page.goto(documentUrl, { waitUntil: "domcontentloaded", timeout: UI_TIMEOUT_MS });

    const sidebarPanel = page.getByText("页面树");
    const privateSection = page.getByText("私有 / 我的页面");
    const titleInput = page.getByLabel("页面标题");
    const editorSurface = page.locator(".wolai-editor [contenteditable=\"true\"]").first();
    const saveIndicator = page.locator("text=已保存");

    await sidebarPanel.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
    await privateSection.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
    await titleInput.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
    await editorSurface.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
    await saveIndicator.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });

    await titleInput.fill(nextTitle);
    const titleSaveResponse = page.waitForResponse(
      (response) =>
        response.url().includes("/api/documents/title") &&
        response.request().method() === "POST" &&
        response.status() === 200,
      { timeout: UI_TIMEOUT_MS },
    );
    await titleInput.evaluate((node) => {
      node.blur();
    });
    await titleSaveResponse;

    const saveResponse = page.waitForResponse(
      (response) =>
        response.url().includes("/api/documents/save") &&
        response.request().method() === "POST" &&
        response.status() === 200 &&
        (response.request().postData() || "").includes(nextBody),
      { timeout: UI_TIMEOUT_MS },
    );
    await editorSurface.click({ timeout: UI_TIMEOUT_MS });
    await editorSurface.fill(nextBody, { timeout: UI_TIMEOUT_MS });
    await saveResponse;
    await saveIndicator.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });

    await page.reload({ waitUntil: "domcontentloaded", timeout: UI_TIMEOUT_MS });
    await sidebarPanel.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
    await privateSection.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
    await titleInput.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
    await page.locator(`text=${nextBody}`).first().waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });

    const persistedTitle = await titleInput.inputValue();
    assert(persistedTitle === nextTitle, `标题刷新后不一致：期望 ${nextTitle}，实际 ${persistedTitle}`);
    const editorText = await page.locator(".wolai-editor").innerText({ timeout: UI_TIMEOUT_MS });
    assert(editorText.includes(nextBody), "正文刷新后未保留刚写入的内容");

    return {
      documentUrl,
      nextTitle,
      nextBody,
    };
  } finally {
    await page.close();
    await browser.close();
  }
}

async function main() {
  const health = await fetch(`${BASE_URL}/`, {
    method: "HEAD",
    redirect: "manual",
    signal: AbortSignal.timeout(REQUEST_TIMEOUT_MS),
  });
  assert(
    [200, 307, 308].includes(health.status),
    `首页探活失败：收到状态码 ${health.status}`,
  );

  const tempDocument = await createTempDocument();
  let regressionResult = null;

  try {
    regressionResult = await runBrowserRegression(tempDocument);
    console.log(
      JSON.stringify(
        {
          ok: true,
          workspaceId: tempDocument.workspaceId,
          documentId: tempDocument.documentId,
          ...regressionResult,
        },
        null,
        2,
      ),
    );
  } finally {
    await purgeTempDocument(tempDocument.documentId);
  }
}

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