"use strict";

const BASE_URL = (process.env.MNOTE_UI_BASE_URL || "http://127.0.0.1:3000").replace(/\/+$/, "");
const MNOTE_WEB_BASE_URL = (process.env.MNOTE_WEB_SMOKE_BASE_URL || "http://127.0.0.1:3104").replace(/\/+$/, "");
const REQUEST_TIMEOUT_MS = Number(process.env.MNOTE_SMOKE_TIMEOUT_MS || 20_000);
const UI_TIMEOUT_MS = Number(process.env.MNOTE_SMOKE_UI_TIMEOUT_MS || 30_000);
const TEST_LOGIN_BUTTON_NAME = "测试账号快速登录";
const TEST_USERNAME_PREFIX = "测试用户";

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

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

  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)
      }`,
    );
  }

  const contentType = response.headers()["content-type"] || "";
  if (!contentType.includes("application/json")) {
    const snippet =
      typeof payload === "string"
        ? payload.slice(0, 200)
        : JSON.stringify(payload).slice(0, 200);
    throw new Error(`${path} 返回了非 JSON 内容：${snippet}`);
  }

  return payload;
}

async function createTempDocument(requestContext, parentId = null) {
  const payload = await requestJson(requestContext, "/api/documents/create", {
    method: "POST",
    data: { parentId },
  });
  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 renameDocument(requestContext, workspaceId, documentId, title) {
  await requestJson(requestContext, "/api/documents/title", {
    method: "POST",
    data: {
      workspaceId,
      documentId,
      title,
    },
  });
}

async function purgeDocument(requestContext, documentId) {
  await requestJson(requestContext, "/api/documents/purge", {
    method: "POST",
    data: { documentId },
  });
}

async function getViewerIdentity(requestContext) {
  const payload = await requestJson(requestContext, "/api/auth/whoami", { method: "GET" });
  assert(payload && typeof payload.userId === "string" && payload.userId, "获取当前用户失败：缺少 userId");
  return payload;
}

async function waitForAuthenticatedRedirect(page, timeout = 8_000) {
  await page.waitForURL((url) => !url.toString().includes("/auth"), {
    timeout,
    waitUntil: "commit",
  });
}

async function isVisible(locator) {
  try {
    return await locator.isVisible();
  } catch {
    return false;
  }
}

async function completeUsernameSetupIfNeeded(page) {
  const saveButton = page.getByRole("button", { name: "保存并继续" });
  if (!(await isVisible(saveButton))) {
    return false;
  }

  const usernameInput = page.locator('input[name="username"]').last();
  await usernameInput.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
  const currentValue = ((await usernameInput.inputValue().catch(() => "")) || "").trim();
  const username = currentValue || `${TEST_USERNAME_PREFIX}${Date.now().toString().slice(-6)}`;
  await usernameInput.fill(username, { timeout: UI_TIMEOUT_MS });
  await saveButton.click({ timeout: UI_TIMEOUT_MS });
  await waitForAuthenticatedRedirect(page, UI_TIMEOUT_MS);
  return true;
}

async function registerTestAccountIfNeeded(page) {
  const switchButton = page.getByRole("button", { name: "还没有账户？立即注册" });
  if (!(await isVisible(switchButton))) {
    return false;
  }

  await switchButton.click({ timeout: UI_TIMEOUT_MS });
  await page.locator('input[name="email"]').fill("test@example.com", { timeout: UI_TIMEOUT_MS });
  await page.locator('input[name="username"]').fill(`${TEST_USERNAME_PREFIX}${Date.now().toString().slice(-6)}`, {
    timeout: UI_TIMEOUT_MS,
  });
  await page.locator('input[name="password"]').fill("Test123456", { timeout: UI_TIMEOUT_MS });
  await page.getByRole("button", { name: "注册" }).click({ timeout: UI_TIMEOUT_MS });
  try {
    await waitForAuthenticatedRedirect(page, UI_TIMEOUT_MS);
    return true;
  } catch {
    return completeUsernameSetupIfNeeded(page);
  }
}

async function waitForViewerIdentity(requestContext, attempts = 6) {
  let lastError = null;
  for (let index = 0; index < attempts; index += 1) {
    try {
      return await getViewerIdentity(requestContext);
    } catch (error) {
      lastError = error;
      await new Promise((resolve) => setTimeout(resolve, 1000));
    }
  }
  throw lastError instanceof Error ? lastError : new Error("获取当前用户失败");
}

async function ensureAuthenticated(page, requestContext) {
  await page.goto(`${BASE_URL}/auth`, { waitUntil: "commit", timeout: UI_TIMEOUT_MS });

  if (page.url().includes("/auth")) {
    const quickLoginButton = page.getByRole("button", { name: TEST_LOGIN_BUTTON_NAME });
    await Promise.race([
      page.waitForURL((url) => !url.toString().includes("/auth"), {
        timeout: UI_TIMEOUT_MS,
        waitUntil: "commit",
      }),
      quickLoginButton.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS }),
    ]);
    if (!page.url().includes("/auth")) {
      return await waitForViewerIdentity(requestContext);
    }
    await quickLoginButton.click({ timeout: UI_TIMEOUT_MS });
    try {
      await waitForAuthenticatedRedirect(page, UI_TIMEOUT_MS);
    } catch {
      const completedUsername = await completeUsernameSetupIfNeeded(page);
      if (!completedUsername) {
        const registered = await registerTestAccountIfNeeded(page);
        if (!registered) {
          throw new Error("测试账号登录后仍停留在 /auth，且未进入可恢复的用户名/注册流程");
        }
      }
    }
  }

  return await waitForViewerIdentity(requestContext);
}

async function prepareTempTreeFixture(requestContext) {
  const uniqueSuffix = Date.now().toString();
  const parentTitle = `task-tree-parent-${uniqueSuffix}`;
  const childTitle = `task-tree-child-${uniqueSuffix}`;

  const parent = await createTempDocument(requestContext, null);
  const child = await createTempDocument(requestContext, parent.documentId);

  await renameDocument(requestContext, parent.workspaceId, parent.documentId, parentTitle);
  await renameDocument(requestContext, parent.workspaceId, child.documentId, childTitle);

  return {
    uniqueSuffix,
    workspaceId: parent.workspaceId,
    parentId: parent.documentId,
    childId: child.documentId,
    parentTitle,
    childTitle,
    createdIds: [parent.documentId, child.documentId],
  };
}

async function cleanupDocuments(requestContext, createdIds) {
  for (const documentId of [...createdIds].reverse()) {
    await purgeDocument(requestContext, documentId);
  }
}

async function openDocument(page, workspaceId, documentId) {
  const url = `${BASE_URL}/documents/${documentId}?workspaceId=${encodeURIComponent(workspaceId)}`;
  await page.goto(url, { waitUntil: "commit", timeout: UI_TIMEOUT_MS });
  return url;
}

async function openSectionView(page) {
  const button = page.getByRole("button", { name: "分组" });
  await button.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
  await button.click({ timeout: UI_TIMEOUT_MS });
}

async function openFilesystemView(page) {
  const button = page.getByRole("button", { name: "文件" });
  await button.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
  await button.click({ timeout: UI_TIMEOUT_MS });
}

async function ensurePageOptionsVisible(page) {
  const toggle = page.getByRole("button", { name: /显示页面选项|隐藏页面选项/ });
  await toggle.waitFor({ state: "visible", timeout: UI_TIMEOUT_MS });
  const label = (await toggle.getAttribute("aria-label")) || "";
  if (label.includes("显示")) {
    await toggle.click({ timeout: UI_TIMEOUT_MS });
  }
}

module.exports = {
  BASE_URL,
  MNOTE_WEB_BASE_URL,
  REQUEST_TIMEOUT_MS,
  UI_TIMEOUT_MS,
  assert,
  cleanupDocuments,
  createTempDocument,
  ensureAuthenticated,
  ensurePageOptionsVisible,
  getViewerIdentity,
  openDocument,
  openFilesystemView,
  openSectionView,
  prepareTempTreeFixture,
  purgeDocument,
  renameDocument,
  requestJson,
};