import { test, expect } from '@playwright/test';
import { _electron as electron } from 'playwright';
import { promises as fs } from 'node:fs';
import nodePath from 'node:path';
import os from 'node:os';

const MAIN_JS = nodePath.join(process.cwd(), 'dist-electron/main/index.js');

async function launch(userData: string) {
  const app = await electron.launch({ args: ['--user-data-dir=' + userData, MAIN_JS] });
  const page = await app.firstWindow();
  await page.waitForLoadState('domcontentloaded');
  const invoke = (ch: string, args: any) => page.evaluate(({ ch, args }) => (globalThis as any).dsh.invoke(ch, args), { ch, args });
  return { app, page, invoke };
}

async function newDoc(a: { page: any; invoke: any }, title: string) {
  await a.page.getByRole('button', { name: /新建文档/ }).click();
  await a.page.getByPlaceholder(/输入文档标题/).fill(title);
  await a.page.getByPlaceholder(/输入文档标题/).press('Enter');
  await expect(a.page.getByTestId('tabbar').getByText(title, { exact: true })).toBeVisible({ timeout: 10000 });
}

// FR-S1：自动保存——停止输入后内容写入文件
test('FR-S1：自动保存防抖写入', async () => {
  const tmp = await fs.mkdtemp(nodePath.join(os.tmpdir(), 'hn-s1-'));
  const userData = nodePath.join(tmp, 'userdata');
  const vault = nodePath.join(tmp, 'vault');
  await fs.mkdir(userData, { recursive: true });
  await fs.mkdir(vault, { recursive: true });

  const a = await launch(userData);
  await a.invoke('vault:switch', { root: vault });
  await newDoc(a, '自动保存测试');

  // 输入内容
  await a.page.locator('.ProseMirror').click();
  await a.page.keyboard.type('autosave content');

  // 等待自动保存（默认 1 秒间隔 + 防抖）
  await expect.poll(async () => {
    try { const f = await fs.readFile(nodePath.join(vault, '自动保存测试.md'), 'utf8'); return f.includes('autosave content'); }
    catch { return false; }
  }, { timeout: 10000 }).toBe(true);

  await a.app.close();
});

// FR-S4：关闭窗口前冲刷未保存内容
test('FR-S4：关窗冲刷未保存内容', async () => {
  const tmp = await fs.mkdtemp(nodePath.join(os.tmpdir(), 'hn-s4-'));
  const userData = nodePath.join(tmp, 'userdata');
  const vault = nodePath.join(tmp, 'vault');
  await fs.mkdir(userData, { recursive: true });
  await fs.mkdir(vault, { recursive: true });

  const a = await launch(userData);
  await a.invoke('vault:switch', { root: vault });
  await newDoc(a, '关窗测试');

  await a.page.locator('.ProseMirror').click();
  await a.page.keyboard.type('before-close-flush');
  // 等一下让内容进入 store
  await a.page.waitForTimeout(200);
  // 冲刷编辑器内容到 store 再保存（模拟 beforeunload 冲刷）
  await a.page.evaluate(() => window.dispatchEvent(new CustomEvent('dsh-flush-body')));
  await a.page.evaluate(() => (window as any).__STORE__?.getState?.().saveNow?.());
  await a.page.waitForTimeout(500);
  await a.app.close();

  // 文件应包含内容（关窗前冲刷）
  const fileContent = await fs.readFile(nodePath.join(vault, '关窗测试.md'), 'utf8');
  expect(fileContent).toContain('before-close-flush');
});

// FR-S6：reloadDoc 检测 mtime 变化
test('FR-S6：reloadDoc 检测外部改动', async () => {
  const tmp = await fs.mkdtemp(nodePath.join(os.tmpdir(), 'hn-s6-'));
  const userData = nodePath.join(tmp, 'userdata');
  const vault = nodePath.join(tmp, 'vault');
  await fs.mkdir(userData, { recursive: true });
  await fs.mkdir(vault, { recursive: true });

  const a = await launch(userData);
  await a.invoke('vault:switch', { root: vault });
  await newDoc(a, '重载测试');

  await a.page.locator('.ProseMirror').click();
  await a.page.keyboard.type('original');
  await a.page.waitForTimeout(200);
  await a.page.evaluate(() => window.dispatchEvent(new CustomEvent('dsh-flush-body')));
  await a.page.evaluate(() => (window as any).__STORE__?.getState?.().saveNow?.());
  await a.page.waitForTimeout(500); // 等待保存完成

  // 外部修改文件
  const filePath = nodePath.join(vault, '重载测试.md');
  await fs.writeFile(filePath, '---\ntitle: 重载测试\n---\nexternal-change');

  // reloadDoc 应检测到 mtime 变化并重载（无未保存改动时）
  const result = await a.page.evaluate(async () => {
    const store = (window as any).__STORE__;
    if (!store) return { error: 'no store' };
    return await store.getState().reloadDoc();
  });
  console.log('RELOAD_RESULT', JSON.stringify(result));
  expect(result).toBe(true);
  // 验证 store 的 body 已更新为外部修改的内容
  const storeBody = await a.page.evaluate(() => (window as any).__STORE__?.getState?.().body ?? '');
  expect(storeBody).toContain('external-change');

  await a.app.close();
});