/**
 * WorkspaceService 测试（v0.7.2 覆盖补齐 —— 此前零测试）
 *
 * 锁定工作空间生命周期契约：
 * 1. initialize 创建目录结构（logs/.metona）与必需文件（SOUL.md/MEMORY.md）
 * 2. MEMORY.md 模板元数据头 + 5 分区结构
 * 3. appendMemory 分区追加语义（含未知 section 兜底）
 * 4. validateMemoryFormat 自动修正（缺元数据头/缺分区）
 * 5. updateMemoryTimestamp / reload（外部编辑同步）
 */

import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import { mkdtempSync, mkdirSync, writeFileSync, readFileSync, existsSync, rmSync } from 'fs';
import { join } from 'path';
import { tmpdir } from 'os';

import { WorkspaceService } from '../workspace.service';

let wsRoot: string;

beforeEach(() => {
  wsRoot = mkdtempSync(join(tmpdir(), 'metona-ws-'));
});

afterEach(() => {
  try {
    rmSync(wsRoot, { recursive: true, force: true });
  } catch {
    /* ignore */
  }
});

describe('WorkspaceService — initialize', () => {
  it('创建工作空间目录结构 + 两个必需文件 + 自动目录', () => {
    const wsPath = join(wsRoot, 'ws');
    const svc = new WorkspaceService(wsPath);
    const info = svc.initialize();

    expect(info.isValid).toBe(true);
    expect(info.path).toBe(wsPath);
    expect(existsSync(join(wsPath, 'SOUL.md'))).toBe(true);
    expect(existsSync(join(wsPath, 'MEMORY.md'))).toBe(true);
    expect(existsSync(join(wsPath, 'logs'))).toBe(true);
    expect(existsSync(join(wsPath, '.metona'))).toBe(true);
    // 本次启动自动创建的文件计入 missingFiles
    expect(info.missingFiles).toEqual(['SOUL.md', 'MEMORY.md']);
  });

  it('已有完整文件的工作空间：missingFiles 为空且内容不被覆盖', () => {
    const wsPath = join(wsRoot, 'ws');
    mkdirSync(wsPath, { recursive: true });
    writeFileSync(join(wsPath, 'SOUL.md'), '# 自定义人格', 'utf-8');
    writeFileSync(
      join(wsPath, 'MEMORY.md'),
      '# MEMORY.md\n> 创建时间: x\n> 最后更新: y\n> 工作空间: z\n',
      'utf-8',
    );
    const svc = new WorkspaceService(wsPath);
    const info = svc.initialize();
    expect(info.missingFiles).toEqual([]);
    expect(svc.getFiles().soul).toBe('# 自定义人格');
  });

  it('MEMORY.md 模板包含元数据头与核心分区', () => {
    const wsPath = join(wsRoot, 'ws');
    const svc = new WorkspaceService(wsPath);
    svc.initialize();
    const content = readFileSync(join(wsPath, 'MEMORY.md'), 'utf-8');
    expect(content).toContain('# MEMORY.md');
    expect(content).toContain('> 创建时间:');
    expect(content).toContain('> 最后更新:');
    expect(content).toContain('> 工作空间:');
    for (const section of [
      '## 用户偏好',
      '## 项目上下文',
      '## 重要决策',
      '## 待办事项',
      '## 已知问题',
    ]) {
      expect(content).toContain(section);
    }
  });
});

describe('WorkspaceService — appendMemory', () => {
  it('追加到指定 section 末尾（不侵入下一分区）', () => {
    const wsPath = join(wsRoot, 'ws');
    const svc = new WorkspaceService(wsPath);
    svc.initialize();

    svc.appendMemory('用户偏好', '偏好深色主题');
    svc.appendMemory('用户偏好', '偏好简洁回复');

    const content = readFileSync(join(wsPath, 'MEMORY.md'), 'utf-8');
    const sectionStart = content.indexOf('## 用户偏好');
    const sectionEnd = content.indexOf('## 项目上下文');
    const section = content.slice(sectionStart, sectionEnd);
    expect(section).toContain('- 偏好深色主题');
    expect(section).toContain('- 偏好简洁回复');
  });

  it('未知 section 追加到文件末尾并自动创建分区头', () => {
    const wsPath = join(wsRoot, 'ws');
    const svc = new WorkspaceService(wsPath);
    svc.initialize();

    svc.appendMemory('自定义分区', '条目内容');
    const content = readFileSync(join(wsPath, 'MEMORY.md'), 'utf-8');
    expect(content).toContain('## 自定义分区');
    expect(content).toContain('- 条目内容');
  });
});

describe('WorkspaceService — validateMemoryFormat 自动修正', () => {
  it('缺失元数据头与核心分区被自动补齐，内容不丢失', () => {
    const wsPath = join(wsRoot, 'ws');
    mkdirSync(wsPath, { recursive: true });
    writeFileSync(join(wsPath, 'MEMORY.md'), '# MEMORY.md\n- 用户留下的重要内容', 'utf-8');

    const svc = new WorkspaceService(wsPath);
    expect(svc.validateMemoryFormat()).toBe(false); // false = 有修正

    const content = readFileSync(join(wsPath, 'MEMORY.md'), 'utf-8');
    expect(content).toContain('> 创建时间:');
    expect(content).toContain('> 工作空间:');
    for (const section of ['## 用户偏好', '## 项目上下文', '## 重要决策']) {
      expect(content).toContain(section);
    }
    // 原内容保留
    expect(content).toContain('- 用户留下的重要内容');
  });

  it('格式完整时返回 true 且不触发写盘', () => {
    const wsPath = join(wsRoot, 'ws');
    const svc = new WorkspaceService(wsPath);
    svc.initialize();
    expect(svc.validateMemoryFormat()).toBe(true);
  });
});

describe('WorkspaceService — 时间戳与 reload', () => {
  it('updateMemoryTimestamp 更新"最后更新"行', () => {
    const wsPath = join(wsRoot, 'ws');
    const svc = new WorkspaceService(wsPath);
    svc.initialize();

    svc.updateMemoryTimestamp();
    const content = svc.getFiles().memory;
    expect(content).toMatch(/> 最后更新: \d{4}-\d{2}-\d{2}T/);
  });

  it('reload 同步外部编辑（用户手动改文件后）', () => {
    const wsPath = join(wsRoot, 'ws');
    const svc = new WorkspaceService(wsPath);
    svc.initialize();

    writeFileSync(join(wsPath, 'SOUL.md'), '# 外部修改后的人格', 'utf-8');
    const files = svc.reload();
    expect(files.soul).toBe('# 外部修改后的人格');
  });

  it('getFiles 返回副本（外部修改引用不影响内部状态）', () => {
    const wsPath = join(wsRoot, 'ws');
    const svc = new WorkspaceService(wsPath);
    svc.initialize();
    const files = svc.getFiles();
    files.soul = 'tampered';
    expect(svc.getFiles().soul).not.toBe('tampered');
  });
});