import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import nodePath from 'node:path';
import os from 'node:os';
import { promises as fs } from 'node:fs';
import { FileService } from '../../apps/desktop/src/main/services/file-service';

const tmp = nodePath.join(os.tmpdir(), 'dsh-m3-test');
beforeEach(async () => { await fs.rm(tmp, { recursive: true, force: true }); await fs.mkdir(tmp, { recursive: true }); });
afterEach(async () => { await fs.rm(tmp, { recursive: true, force: true }); });

describe('M3 文档属性契约（FR-M3/M4/M5/M6）', () => {
  it('标签增删后落盘往返一致', async () => {
    const s = new FileService(tmp);
    await s.create('', 'd', false);
    await s.writeDoc({ path: 'd.md', meta: { tags: ['x', 'y'] }, body: '正文' });
    let r = await s.readDoc('d.md');
    expect(r.meta.tags).toEqual(['x', 'y']);
    // 删一个
    await s.writeDoc({ path: 'd.md', meta: { tags: ['x'] }, body: '正文' });
    r = await s.readDoc('d.md');
    expect(r.meta.tags).toEqual(['x']);
  });

  it('星标切换落盘：true 写入、false 不写', async () => {
    const s = new FileService(tmp);
    await s.create('', 'd', false);
    await s.writeDoc({ path: 'd.md', meta: { star: true }, body: 'b' });
    expect((await s.readDoc('d.md')).meta.star).toBe(true);
    // 取消星标 -> star 字段不落盘
    await s.writeDoc({ path: 'd.md', meta: { star: false }, body: 'b' });
    const r = await s.readDoc('d.md');
    expect(r.meta.star).toBeFalsy();
    // 文件内不应出现 star: 字样
    const raw = await fs.readFile(nodePath.join(tmp, 'd.md'), 'utf8');
    expect(raw).not.toContain('star');
  });

  it('关联链接落盘往返', async () => {
    const s = new FileService(tmp);
    await s.create('', 'd', false);
    await s.writeDoc({ path: 'd.md', meta: { links: ['a/b.md', 'c.md'] }, body: 'b' });
    expect((await s.readDoc('d.md')).meta.links).toEqual(['a/b.md', 'c.md']);
  });

  it('文档信息：标题缺省回退文件名', async () => {
    const s = new FileService(tmp);
    await s.create('', '我的笔记', false);
    await s.writeDoc({ path: '我的笔记.md', meta: {}, body: '内容' });
    const r = await s.readDoc('我的笔记.md');
    expect(r.meta.title).toBeUndefined(); // 缺省不落盘，UI 侧回退文件名
  });
});