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';

// 大库性能压测：1000 篇文档，测 treeList/search/graph 耗时（opt-in via STRESS=1）
const MAIN_JS = nodePath.join(process.cwd(), 'dist-electron/main/index.js');
const N = 1000;
const STRESS = process.env.STRESS === '1';
test.skip(!STRESS, '需 STRESS=1 启用大库压测');

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 };
}

test(`压测：${N} 篇文档 tree/search/graph 耗时`, async () => {
  const tmp = await fs.mkdtemp(nodePath.join(os.tmpdir(), 'hn-stress-'));
  const userData = nodePath.join(tmp, 'userdata');
  const vault = nodePath.join(tmp, 'vault');
  await fs.mkdir(userData, { recursive: true });
  await fs.mkdir(vault, { recursive: true });

  // 直接落盘生成 N 篇（带 frontmatter + 串联 links）
  const pad = (i: number) => String(i).padStart(4, '0');
  const gen0 = Date.now();
  await Promise.all(Array.from({ length: N }, (_, i) => {
    const id = pad(i + 1);
    const next = pad((i + 1) % N + 1);
    const body = '# doc-' + id + '\n\n' + Array.from({ length: 20 }, (_, j) => '性能压测正文第' + j + '段。').join('\n');
    const raw = '---\ntitle: doc-' + id + '\nlinks: [doc-' + next + '.md]\n---\n' + body + '\n';
    return fs.writeFile(nodePath.join(vault, 'doc-' + id + '.md'), raw, 'utf8');
  }));
  console.log('[stress] 生成 ' + N + ' 篇耗时 ' + (Date.now() - gen0) + 'ms');

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

  const t0 = Date.now();
  const tree: { path: string; type: string }[] = await a.invoke('tree:list', null);
  const tTree = Date.now() - t0;
  console.log('[stress] treeList ' + tree.length + ' 项 耗时 ' + tTree + 'ms');
  expect(tree.length).toBe(N);

  const s0 = Date.now();
  const hits: unknown[] = await a.invoke('search', { query: '压测' });
  const tSearch = Date.now() - s0;
  console.log('[stress] search 命中 ' + hits.length + ' 耗时 ' + tSearch + 'ms');
  expect(hits.length).toBeGreaterThan(0);

  const g0 = Date.now();
  const gd: { nodes: unknown[]; edges: unknown[] } = await a.invoke('graph', null);
  const tGraph = Date.now() - g0;
  console.log('[stress] graph 节点 ' + gd.nodes.length + ' 边 ' + gd.edges.length + ' 耗时 ' + tGraph + 'ms');
  expect(gd.nodes.length).toBe(N);

  // 宽松阈值（机器相关）：确保不病态
  expect(tTree).toBeLessThan(15000);
  expect(tGraph).toBeLessThan(30000);
  await a.app.close();
});