/**
 * filesystem 七工具实体夹具套件（v0.7.0 覆盖补齐 → v0.7.5 大幅扩充）
 *
 * 以真实临时目录为夹具，锁定安全边界与核心 I/O 行为：
 * - read_file：二进制拒绝 / 10MB 大小闸门 / offset-limit 切片与起始行号 /
 *   tail 模式优先 / 超长行截断计数 / 编码检测矩阵（utf-8-bom/utf-16le/utf-16be/gbk）
 * - write_file：内容必填、10MB 上限、overwrite 幂等、append 追加语义、
 *   父目录自动创建、append TOCTOU 拒绝、原子写无 tmp 残留
 * - list_directory：depth 递归上限、include_hidden、node_modules 跳过、1000 上限
 * - search_files：regex 非法报错、context_lines、ReDoS 拦截、MEMORY.md 跳过、limit 截断
 * - delete_file：根目录保护、TOCTOU 双 realpath 校验、recursive=非空目录必填
 * - file_move：跨工作空间拒绝、root 保护、overwrite 覆盖移动、父目录自动创建
 * - file_info：size/mode/type/编码探测/二进制检测字段形态
 */

import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import { mkdtempSync, rmSync, writeFileSync, mkdirSync, symlinkSync, readdirSync } from 'fs';
import { tmpdir } from 'os';
import { join } from 'path';

import {
  ReadFileTool,
  WriteFileTool,
  SearchFilesTool,
  DeleteFileTool,
  FileMoveTool,
  FileInfoTool,
  ListDirectoryTool,
} from '../filesystem';
import type { ToolExecutionContext } from '../../../types/metona-tool';

/** 模块级 helper：存在性探测 / 文本读取 */
function existsP(p: string): boolean {
  try {
    // eslint-disable-next-line @typescript-eslint/no-require-imports
    return require('fs').statSync(p) !== undefined;
  } catch {
    return false;
  }
}
function readText(p: string): string {
  // eslint-disable-next-line @typescript-eslint/no-require-imports
  return require('fs').readFileSync(p, 'utf-8') as string;
}

function ctxFor(ws: string): ToolExecutionContext {
  return { sessionId: 't', workspacePath: ws, iteration: 1, requestId: 'r' };
}

describe('filesystem 工具 — read_file', () => {
  let ws: string;
  beforeAll(() => {
    ws = mkdtempSync(join(tmpdir(), 'metona-fs-'));
    writeFileSync(
      join(ws, 'sample.txt'),
      Array.from({ length: 25 }, (_, i) => `line-${i + 1}`).join('\n'),
    );
    // 二进制文件（含 NUL 字节触发探测）
    writeFileSync(join(ws, 'blob.bin'), Buffer.from([0x00, 0x01, 0x02, 0xff, 0xfe]));
    // 超长行
    writeFileSync(join(ws, 'longline.txt'), `${'L'.repeat(12000)}\nshort\n`);
    // 编码矩阵
    writeFileSync(
      join(ws, 'utf8bom.txt'),
      Buffer.concat([Buffer.from([0xef, 0xbb, 0xbf]), Buffer.from('BOM内容', 'utf-8')]),
    );
    writeFileSync(
      join(ws, 'utf16le.txt'),
      Buffer.concat([Buffer.from([0xff, 0xfe]), Buffer.from('UTF16文本', 'utf16le')]),
    );
    const beBody = Buffer.from('UTF16BE文本', 'utf16le');
    const beSwapped = Buffer.from(beBody);
    beSwapped.swap16();
    writeFileSync(join(ws, 'utf16be.txt'), Buffer.concat([Buffer.from([0xfe, 0xff]), beSwapped]));
    // GBK 编码（CP936）字节样本：'中文' 的 GBK 编码
    writeFileSync(
      join(ws, 'gbk.txt'),
      Buffer.from([0xd6, 0xd0, 0xce, 0xc4, 0x0a, 0xbb, 0xb2, 0xbe, 0xad]),
    );
    // 空文件
    writeFileSync(join(ws, 'empty.txt'), '');
    mkdirSync(join(ws, 'sub'), { recursive: true });
    writeFileSync(join(ws, 'sub', 'inner.txt'), 'inner');
  });
  afterAll(() => {
    try {
      rmSync(ws, { recursive: true, force: true });
    } catch {
      /* ignore */
    }
  });

  const tool = new ReadFileTool();

  it('全文读取：total_lines/returned_lines/encoding/mode 形态', async () => {
    const r = (await tool.execute({ file_path: 'sample.txt' }, ctxFor(ws))) as Record<
      string,
      unknown
    >;
    expect(r.success).toBe(true);
    expect(r.total_lines).toBe(25);
    expect(r.returned_lines).toBe(25);
    expect((r.encoding as string).length).toBeGreaterThan(0);
    expect(r.mode).toBe('offset');
    expect(String(r.content)).toContain('line-1\n');
  });

  it('offset/limit 切片：1-indexed 起始行号正确', async () => {
    const r = (await tool.execute(
      { file_path: 'sample.txt', offset: 3, limit: 2 },
      ctxFor(ws),
    )) as Record<string, unknown>;
    expect((r.content as string).split('\n')).toEqual(['line-3', 'line-4']);
    expect(r.start_line).toBe(3);
    expect(r.truncated).toBe(true); // 25 行 > offset-1+limit=4 → truncated
  });

  it('tail 模式优先于 offset/limit 且标记 mode=tail', async () => {
    const r = (await tool.execute(
      { file_path: 'sample.txt', tail: 2, offset: 99 },
      ctxFor(ws),
    )) as Record<string, unknown>;
    expect(r.mode).toBe('tail');
    expect((r.content as string).split('\n')).toEqual(['line-24', 'line-25']);
    expect(r.start_line).toBe(24);
    expect(r.truncated).toBe(true);
  });

  it('tail=1 读取最后一行', async () => {
    const r = (await tool.execute({ file_path: 'sample.txt', tail: 1 }, ctxFor(ws))) as Record<
      string,
      unknown
    >;
    expect(r.content).toBe('line-25');
    expect(r.mode).toBe('tail');
    expect(r.truncated).toBe(true);
  });

  it('tail 超过文件总行数 → 全量返回且 truncated=false', async () => {
    const r = (await tool.execute({ file_path: 'sample.txt', tail: 999 }, ctxFor(ws))) as Record<
      string,
      unknown
    >;
    expect((r.content as string).split('\n')).toHaveLength(25);
    expect(r.truncated).toBe(false);
    expect(r.start_line).toBe(1);
  });

  it('offset 超过总行数 → 空内容且 truncated=false', async () => {
    const r = (await tool.execute(
      { file_path: 'sample.txt', offset: 100, limit: 5 },
      ctxFor(ws),
    )) as Record<string, unknown>;
    expect(r.success).toBe(true);
    expect(r.content).toBe('');
    expect(r.returned_lines).toBe(0);
    expect(r.truncated).toBe(false);
  });

  it('limit 下限 1 钳制（limit=0 等同 1）', async () => {
    const r = (await tool.execute(
      { file_path: 'sample.txt', offset: 1, limit: 0 },
      ctxFor(ws),
    )) as Record<string, unknown>;
    expect((r.content as string).split('\n')).toHaveLength(1);
  });

  it('limit 上限 2000 钳制（limit=99999 不爆量）', async () => {
    const r = (await tool.execute({ file_path: 'sample.txt', limit: 99999 }, ctxFor(ws))) as Record<
      string,
      unknown
    >;
    expect(r.returned_lines).toBe(25);
  });

  it('超长行截断并计入 lines_truncated', async () => {
    const r = (await tool.execute({ file_path: 'longline.txt' }, ctxFor(ws))) as Record<
      string,
      unknown
    >;
    expect(r.lines_truncated).toBe(1);
    expect((r.content as string).split('\n')[0].length).toBeLessThan(12000);
    expect(r.content as string).toContain('[line truncated]');
  });

  it('二进制文件被拒并给出建议', async () => {
    const r = (await tool.execute({ file_path: 'blob.bin' }, ctxFor(ws))) as {
      success: boolean;
      error?: string;
    };
    expect(r.success).toBe(false);
    expect(String((r as { error?: string }).error)).toContain('Binary');
  });

  it('工作空间外路径失败（file-guard 边界）', async () => {
    const outside = process.platform === 'win32' ? 'C:\\Windows\\notepad.exe' : '/etc/passwd';
    const r = (await tool.execute({ file_path: outside }, ctxFor(ws))) as { success: boolean };
    expect(r.success).toBe(false);
  });

  it('路径遍历 ../ 跳出 → 拒绝', async () => {
    const r = (await tool.execute({ file_path: '../secret.txt' }, ctxFor(ws))) as {
      success: boolean;
    };
    expect(r.success).toBe(false);
  });

  it('相对路径 ./ 前缀可读', async () => {
    const r = (await tool.execute({ file_path: './sample.txt' }, ctxFor(ws))) as {
      success: boolean;
    };
    expect(r.success).toBe(true);
  });

  it('文件不存在 → File not found', async () => {
    const r = (await tool.execute({ file_path: 'nope.txt' }, ctxFor(ws))) as {
      success: boolean;
      error?: string;
    };
    expect(r.success).toBe(false);
    expect(String((r as { error?: string }).error)).toContain('File not found');
  });

  it('根 MEMORY.md 受保护不可读', async () => {
    writeFileSync(join(ws, 'MEMORY.md'), '# memory');
    const r = (await tool.execute({ file_path: 'MEMORY.md' }, ctxFor(ws))) as { success: boolean };
    expect(r.success).toBe(false);
  });

  it('空文件：total_lines=1（split 空串语义）、content 空串', async () => {
    const r = (await tool.execute({ file_path: 'empty.txt' }, ctxFor(ws))) as Record<
      string,
      unknown
    >;
    expect(r.success).toBe(true);
    expect(r.total_lines).toBe(1); // ''.split('\n') → [''] 长度为 1
    expect(r.content).toBe('');
    expect(r.returned_lines).toBe(1);
  });

  it('UTF-8 BOM 文件 → encoding=utf-8-bom 且 BOM 被剥离', async () => {
    const r = (await tool.execute({ file_path: 'utf8bom.txt' }, ctxFor(ws))) as Record<
      string,
      unknown
    >;
    expect(r.encoding).toBe('utf-8-bom');
    expect(String(r.content)).toBe('BOM内容');
    expect(String(r.content).charCodeAt(0)).not.toBe(0xfeff);
  });

  it('UTF-16LE 文件正常读取（v0.8.0 P1-3.3 BOM 检测根治后契约）', async () => {
    // v0.8.0 P1-3.3 根治: isBinaryFile 此前的 NUL 字节启发式拒绝一切 UTF-16
    // 文件，decodeBufferWithDetection 的 UTF-16 分支不可达（原缺陷被本测试
    // 锁定留档）。现 UTF-16 BOM（FF FE / FE FF）视为文本，编码探测生效。
    const r = (await tool.execute({ file_path: 'utf16le.txt' }, ctxFor(ws))) as {
      success: boolean;
      content?: string;
      encoding?: string;
    };
    expect(r.success).toBe(true);
    expect(r.encoding).toBe('utf-16le');
  });

  it('UTF-16BE 文件正常读取（v0.8.0 P1-3.3）', async () => {
    const r = (await tool.execute({ file_path: 'utf16be.txt' }, ctxFor(ws))) as {
      success: boolean;
      content?: string;
    };
    expect(r.success).toBe(true);
  });

  it('GBK 字节样本 → 降级 gbk 编码并正确解码', async () => {
    const r = (await tool.execute({ file_path: 'gbk.txt' }, ctxFor(ws))) as Record<string, unknown>;
    // Node TextDecoder('gbk') 在宿主支持时返回 gbk；不支持时降级 utf-8-loose
    const enc = r.encoding as string;
    expect(['gbk', 'utf-8', 'utf-8-loose']).toContain(enc);
  });

  it('10MB 闸门：超过大小上限被拒', async () => {
    const big = join(ws, 'big.bin');
    writeFileSync(big, Buffer.alloc(10 * 1024 * 1024 + 10, 0x61));
    const r = (await tool.execute({ file_path: 'big.bin' }, ctxFor(ws))) as {
      success: boolean;
      error?: string;
    };
    expect(r.success).toBe(false);
    expect(String((r as { error?: string }).error)).toContain('File too large');
  });

  it('子目录文件可读', async () => {
    const r = (await tool.execute({ file_path: 'sub/inner.txt' }, ctxFor(ws))) as {
      success: boolean;
      content?: string;
    };
    expect(r.success).toBe(true);
    expect(r.content).toBe('inner');
  });
});

describe('filesystem 工具 — write_file', () => {
  let ws: string;
  beforeAll(() => {
    ws = mkdtempSync(join(tmpdir(), 'metona-wf-'));
  });
  afterAll(() => rmSync(ws, { recursive: true, force: true }));

  const tool = new WriteFileTool();
  const c = () => ctxFor(ws);

  it('新建 + overwrite 幂等写入；返回 success=true', async () => {
    const p = join(ws, 'created.txt');
    const first = (await tool.execute({ file_path: 'created.txt', content: 'v1' }, c())) as {
      success: boolean;
    };
    expect(first.success).toBe(true);
    expect(readText(p)).toBe('v1');

    const second = (await tool.execute(
      { file_path: 'created.txt', content: 'v2-longer' },
      c(),
    )) as { success: boolean };
    expect(second.success).toBe(true);
    expect(readText(p)).toBe('v2-longer'); // overwrite 为整体替换而非追加
  });

  it('overwrite 原子写：不残留 .tmp_* 临时文件', async () => {
    await tool.execute({ file_path: 'atomic.txt', content: 'data' }, c());
    const leftovers = readdirSync(ws).filter((f) => f.includes('.tmp_'));
    expect(leftovers).toHaveLength(0);
    expect(readText(join(ws, 'atomic.txt'))).toBe('data');
  });

  it('append 模式追加到末尾', async () => {
    void (await tool.execute({ file_path: 'log.txt', content: 'one' }, c()));
    void (await tool.execute({ file_path: 'log.txt', content: '\ntwo', mode: 'append' }, c()));
    expect(readText(join(ws, 'log.txt'))).toBe('one\ntwo');
  });

  it('append 到不存在文件 → 创建并返回 created=true、mode=append', async () => {
    const r = (await tool.execute(
      { file_path: 'newlog.txt', content: 'first', mode: 'append' },
      c(),
    )) as { success: boolean; created?: boolean; mode?: string; old_size?: number };
    expect(r.success).toBe(true);
    expect(r.mode).toBe('append');
    expect(r.created).toBe(true);
    expect(r.old_size).toBe(0);
    expect(readText(join(ws, 'newlog.txt'))).toBe('first');
  });

  it('append 返回 old_size/new_file_size 语义', async () => {
    await tool.execute({ file_path: 'size.txt', content: '01234' }, c());
    const r = (await tool.execute(
      { file_path: 'size.txt', content: '567', mode: 'append' },
      c(),
    )) as { success: boolean; old_size?: number; new_file_size?: number; bytes_written?: number };
    expect(r.old_size).toBe(5);
    expect(r.new_file_size).toBe(8);
    expect(r.bytes_written).toBe(3);
  });

  it('append 指向工作空间外符号链接 → 拒绝（TOCTOU/逃逸防护）', async () => {
    const outsideFile = join(ws, '..', `metona-outside-${Date.now()}.txt`);
    writeFileSync(outsideFile, 'external');
    const link = join(ws, 'evil-link.txt');
    try {
      symlinkSync(outsideFile, link);
    } catch {
      // 无权限创建 symlink 的环境跳过（Windows 需开发者模式/管理员）
      rmSync(outsideFile, { force: true });
      return;
    }
    const r = (await tool.execute(
      { file_path: 'evil-link.txt', content: 'x', mode: 'append' },
      c(),
    )) as { success: boolean };
    expect(r.success).toBe(false);
    expect(readText(outsideFile)).toBe('external'); // 外部文件未被写入
    rmSync(outsideFile, { force: true });
  });

  it('父目录自动创建（递归）', async () => {
    const r = (await tool.execute({ file_path: 'a/b/c/deep.txt', content: 'deep' }, c())) as {
      success: boolean;
    };
    expect(r.success).toBe(true);
    expect(readText(join(ws, 'a', 'b', 'c', 'deep.txt'))).toBe('deep');
  });

  it('content 缺失与超限内容的错误路径', async () => {
    const missing = (await tool.execute({ file_path: 'no-content.bin' }, c())) as {
      success: boolean;
    };
    expect(missing.success).toBe(false);

    const tooBig = (await tool.execute(
      { file_path: 'huge.txt', content: 'A'.repeat(10 * 1024 * 1024 + 5) },
      c(),
    )) as { success: boolean; error?: string };
    expect(tooBig.success).toBe(false);
    expect(String((tooBig as { error?: string }).error)).toContain('Content too large');
  });

  it('空字符串 content 允许创建空文件（仅缺失时拒绝）', async () => {
    const r = (await tool.execute({ file_path: 'blank.txt', content: '' }, c())) as {
      success: boolean;
    };
    expect(r.success).toBe(true);
    expect(readText(join(ws, 'blank.txt'))).toBe('');
  });

  it('写入受保护的根 MEMORY.md 失败', async () => {
    writeFileSync(join(ws, 'MEMORY.md'), '# Memory\n- keep');
    const r = (await tool.execute({ file_path: 'MEMORY.md', content: 'evil' }, c())) as {
      success: boolean;
    };
    expect(r.success).toBe(false);
    expect(readText(join(ws, 'MEMORY.md'))).toBe('# Memory\n- keep'); // 内容未被篡改
  });

  it('非法 mode 值回落默认 overwrite 语义', async () => {
    const r = (await tool.execute({ file_path: 'mode.txt', content: 'x', mode: 'bogus' }, c())) as {
      success: boolean;
    };
    expect(r.success).toBe(true);
    expect(readText(join(ws, 'mode.txt'))).toBe('x');
  });
});

describe('filesystem 工具 — list_directory', () => {
  let ws: string;
  beforeAll(() => {
    ws = mkdtempSync(join(tmpdir(), 'metona-ld-'));
    mkdirSync(join(ws, 'deep1', 'deep2'), { recursive: true });
    writeFileSync(join(ws, 'a.txt'), '');
    writeFileSync(join(ws, '.hidden'), 'h');
    mkdirSync(join(ws, 'node_modules'), { recursive: true });
    writeFileSync(join(ws, 'node_modules', 'pkg.js'), '');
    writeFileSync(join(ws, 'deep1', 'deep2', 'leaf.txt'), '');
  });
  afterAll(() => rmSync(ws, { recursive: true, force: true }));

  const tool = new ListDirectoryTool();

  it('node_modules 始终跳过（即便显式 include_hidden）', async () => {
    const r = (await tool.execute(
      { dir_path: '.', include_hidden: true, depth: 5 },
      ctxFor(ws),
    )) as {
      entries: Array<{ name: string }>;
    };
    expect(r.entries.some((e) => e.name === 'node_modules')).toBe(false);
    expect(r.entries.some((e) => e.name === '.hidden')).toBe(true);
  });

  it('depth=5 可达 leaf；depth=1 不可达', async () => {
    const deep = (await tool.execute({ dir_path: '.', depth: 5 }, ctxFor(ws))) as {
      entries: Array<{ name: string; path: string }>;
    };
    expect(deep.entries.some((e) => e.name === 'leaf.txt')).toBe(true);
    const shallow = (await tool.execute({ dir_path: '.', depth: 1 }, ctxFor(ws))) as {
      entries: Array<{ name: string }>;
    };
    expect(shallow.entries.some((e) => e.name === 'leaf.txt')).toBe(false);
  });

  it('1000 条上限：超出后 truncated=true', async () => {
    const many = mkdtempSync(join(tmpdir(), 'metona-many-'));
    for (let i = 0; i < 1050; i++) writeFileSync(join(many, `f${i}.txt`), '');
    try {
      const r = (await new ListDirectoryTool().execute({ dir_path: '.' }, ctxFor(many))) as {
        entries: unknown[];
        truncated: boolean;
        count: number;
      };
      expect(r.count).toBeGreaterThanOrEqual(1000);
      expect(r.entries.length).toBeGreaterThanOrEqual(1000);
      expect(r.truncated).toBe(true);
    } finally {
      rmSync(many, { recursive: true, force: true });
    }
  });

  it('多 glob（*.ts,*.md）过滤文件', async () => {
    const g = mkdtempSync(join(tmpdir(), 'metona-g-'));
    writeFileSync(join(g, 'x.ts'), '');
    writeFileSync(join(g, 'y.md'), '');
    writeFileSync(join(g, 'z.txt'), '');
    try {
      const r = (await tool.execute({ dir_path: '.', glob: '*.ts,*.md' }, ctxFor(g))) as {
        entries: Array<{ name: string }>;
      };
      const names = r.entries.map((e) => e.name);
      expect(names).toContain('x.ts');
      expect(names).toContain('y.md');
      expect(names).not.toContain('z.txt');
    } finally {
      rmSync(g, { recursive: true, force: true });
    }
  });

  it('目录始终列出（glob 不影响目录条目）', async () => {
    const r = (await tool.execute({ dir_path: '.', glob: '*.txt' }, ctxFor(ws))) as {
      entries: Array<{ name: string; type: string }>;
    };
    expect(r.entries.some((e) => e.name === 'deep1' && e.type === 'directory')).toBe(true);
  });
});

// 注：ListDirectoryTool 的基础用例另见 fs-listdir.test.ts（v0.7.2 拆分）

describe('filesystem 工具 — search_files', () => {
  let ws: string;
  beforeAll(() => {
    ws = mkdtempSync(join(tmpdir(), 'metona-se-'));
    writeFileSync(join(ws, 'code.ts'), 'export function alpha() {}\n// beta marker');
    writeFileSync(join(ws, 'notes.md'), 'alpha mention and beta word');
    writeFileSync(join(ws, 'MEMORY.md'), 'alpha secret memory');
    mkdirSync(join(ws, 'nested'), { recursive: true });
    writeFileSync(join(ws, 'nested', 'deep.py'), 'beta again here\nsecond line with delta');
    mkdirSync(join(ws, 'node_modules'), { recursive: true });
    writeFileSync(join(ws, 'node_modules', 'lib.js'), 'beta inside node_modules');
  });
  afterAll(() => rmSync(ws, { recursive: true, force: true }));

  const tool = new SearchFilesTool();

  it('content 搜索带 context_lines 与行号信息', async () => {
    const r = (await tool.execute(
      { target: 'content', pattern: 'beta', context_lines: 1 },
      ctxFor(ws),
    )) as { results: Array<Record<string, unknown>>; count: number; success: boolean };
    expect(r.success).toBe(true);
    expect(r.count).toBeGreaterThanOrEqual(2);
    for (const hit of r.results) {
      expect(
        Number(hit.line ?? (hit as { line_number?: number }).line_number ?? 0),
      ).toBeGreaterThanOrEqual(0);
    }
  });

  it('files 模式按文件名匹配', async () => {
    const r = (await tool.execute({ target: 'files', pattern: '*.md' }, ctxFor(ws))) as {
      results: unknown[];
      count: number;
    };
    expect(r.count).toBeGreaterThanOrEqual(1);
  });

  it('files 模式 glob 精确匹配（? 单字符）', async () => {
    const r = (await tool.execute({ target: 'files', pattern: 'code.t?' }, ctxFor(ws))) as {
      results: Array<{ name: string }>;
      count: number;
    };
    expect(r.count).toBe(1);
    expect(r.results[0].name).toBe('code.ts');
  });

  it('files 模式大小写不敏感（*.TS 命中 code.ts）', async () => {
    const r = (await tool.execute({ target: 'files', pattern: '*.TS' }, ctxFor(ws))) as {
      count: number;
    };
    expect(r.count).toBeGreaterThanOrEqual(1);
  });

  it('非法正则与超长 pattern 的友好失败', async () => {
    const badRegex = (await tool.execute(
      { target: 'content', pattern: '([unclosed' },
      ctxFor(ws),
    )) as { success: boolean };
    expect(badRegex.success).toBe(false);

    const longPattern = (await tool.execute(
      { target: 'content', pattern: 'p'.repeat(501) },
      ctxFor(ws),
    )) as { success: boolean; error?: string };
    expect(longPattern.success).toBe(false);
    expect(String((longPattern as { error?: string }).error)).toContain('max 500');
  });

  it('灾难性正则（ReDoS）被拦截', async () => {
    for (const evil of ['(a+)+$', '(a*)*', 'a+a+', '(a|a)*']) {
      const r = (await tool.execute({ target: 'content', pattern: evil }, ctxFor(ws))) as {
        success: boolean;
        error?: string;
      };
      expect(r.success, `expected ReDoS block for ${evil}`).toBe(false);
      expect(String((r as { error?: string }).error).toLowerCase()).toMatch(
        /catastrophic|redos|rejected/i,
      );
    }
  });

  it('根 MEMORY.md 在 content 搜索中被跳过', async () => {
    const r = (await tool.execute({ target: 'content', pattern: 'secret memory' }, ctxFor(ws))) as {
      count: number;
      results: unknown[];
    };
    expect(r.count).toBe(0);
  });

  it('node_modules 目录在遍历中被跳过', async () => {
    const r = (await tool.execute(
      { target: 'content', pattern: 'inside node_modules' },
      ctxFor(ws),
    )) as {
      count: number;
    };
    expect(r.count).toBe(0);
  });

  it('context_lines 钳制到 5（超出不报错）', async () => {
    const r = (await tool.execute(
      { target: 'content', pattern: 'alpha', context_lines: 99 },
      ctxFor(ws),
    )) as { success: boolean };
    expect(r.success).toBe(true);
  });

  it('limit 截断结果数', async () => {
    const r = (await tool.execute({ target: 'content', pattern: 'a', limit: 1 }, ctxFor(ws))) as {
      count: number;
    };
    expect(r.count).toBeLessThanOrEqual(1);
  });

  it('无匹配 → 空结果且 success=true', async () => {
    const r = (await tool.execute(
      { target: 'content', pattern: 'zzz-nothing-zzz' },
      ctxFor(ws),
    )) as {
      count: number;
      success: boolean;
    };
    expect(r.success).toBe(true);
    expect(r.count).toBe(0);
  });

  it('search path 越界 → 拒绝（Path traversal）', async () => {
    const r = (await tool.execute(
      { target: 'content', pattern: 'x', path: '../outside-dir' },
      ctxFor(ws),
    )) as { success: boolean };
    expect(r.success).toBe(false);
  });
});

describe('delete_file — 根保护 / recursive 契约 / 正常删除', () => {
  let ws: string;
  beforeAll(() => {
    ws = mkdtempSync(join(tmpdir(), 'metona-del-'));
    writeFileSync(join(ws, 'gone.txt'), 'x');
    mkdirSync(join(ws, 'full-dir'));
    writeFileSync(join(ws, 'full-dir', 'child.txt'), 'y');
    mkdirSync(join(ws, 'empty-dir'));
    writeFileSync(join(ws, 'keep.md'), 'soul');
  });
  afterAll(() => rmSync(ws, { recursive: true, force: true }));

  const tool = new DeleteFileTool();
  const c = () => ctxFor(ws);

  it('根目录不可删', async () => {
    const r = (await tool.execute({ file_path: '.', recursive: true }, c())) as {
      success: boolean;
      error?: string;
    };
    expect(r.success).toBe(false);
    expect(String((r as { error?: string }).error)).toContain('Cannot delete workspace root');
  });

  it('非空目录必须显式 recursive=true', async () => {
    const denied = (await tool.execute({ file_path: 'full-dir' }, c())) as {
      success: boolean;
      error?: string;
    };
    expect(denied.success).toBe(false);
    expect(String((denied as { error?: string }).error)).toContain('recursive');

    const ok = (await tool.execute({ file_path: 'full-dir', recursive: true }, c())) as {
      success: boolean;
    };
    expect(ok.success).toBe(true);
    expect(existsP(join(ws, 'full-dir'))).toBe(false);
  });

  it('普通文件删除成功后不存在', async () => {
    const r = (await tool.execute({ file_path: 'gone.txt' }, c())) as { success: boolean };
    expect(r.success).toBe(true);
    expect(existsP(join(ws, 'gone.txt'))).toBe(false);
  });

  it('空目录无需 recursive 即可删除', async () => {
    const r = (await tool.execute({ file_path: 'empty-dir' }, c())) as { success: boolean };
    expect(r.success).toBe(true);
    expect(existsP(join(ws, 'empty-dir'))).toBe(false);
  });

  it('删除文件返回 wasDirectory=false 标志', async () => {
    writeFileSync(join(ws, 'flag.txt'), 'x');
    const r = (await tool.execute({ file_path: 'flag.txt' }, c())) as {
      success: boolean;
      wasDirectory?: boolean;
    };
    expect(r.success).toBe(true);
    expect(r.wasDirectory).toBe(false);
  });

  it('根 MEMORY.md 受 safeResolvePath 保护不可删', async () => {
    const r = (await tool.execute({ file_path: 'MEMORY.md' }, c())) as {
      success: boolean;
      error?: string;
    };
    expect(r.success).toBe(false);
  });

  it('文件不存在 → File or directory not found', async () => {
    const r = (await tool.execute({ file_path: 'not-here.txt' }, c())) as {
      success: boolean;
      error?: string;
    };
    expect(r.success).toBe(false);
    expect(String((r as { error?: string }).error)).toContain('not found');
  });

  it('指向工作空间外的符号链接 → 拒绝（realpath 逃逸校验）', async () => {
    const outsideFile = join(ws, '..', `metona-ext-${Date.now()}.txt`);
    writeFileSync(outsideFile, 'ext');
    const link = join(ws, 'ext-link.txt');
    try {
      symlinkSync(outsideFile, link);
    } catch {
      rmSync(outsideFile, { force: true });
      return;
    }
    const r = (await tool.execute({ file_path: 'ext-link.txt' }, c())) as { success: boolean };
    expect(r.success).toBe(false);
    expect(readText(outsideFile)).toBe('ext'); // 外部文件未被删除
    rmSync(outsideFile, { force: true });
  });
});

describe('file_move / file_info — 移动与元信息', () => {
  let ws: string;
  beforeAll(() => {
    ws = mkdtempSync(join(tmpdir(), 'metona-mv-'));
    writeFileSync(join(ws, 'from.txt'), 'payload');
    mkdirSync(join(ws, 'dest-dir'));
    writeFileSync(join(ws, 'dest-dir', 'existing.txt'), 'old');
    writeFileSync(join(ws, 'png-like.bin'), Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a]));
    mkdirSync(join(ws, 'dir-to-move'));
    writeFileSync(join(ws, 'dir-to-move', 'inner.txt'), 'i');
    writeFileSync(
      join(ws, 'utf16-info.bin'),
      Buffer.concat([Buffer.from([0xff, 0xfe]), Buffer.from('info', 'utf16le')]),
    );
  });
  afterAll(() => rmSync(ws, { recursive: true, force: true }));

  const move = new FileMoveTool();
  const info = new FileInfoTool();
  const c = () => ctxFor(ws);

  it('跨工作空间移动被拒（destination 越界）', async () => {
    const otherDrive =
      process.platform === 'win32' ? 'D:\\elsewhere\\t.txt' : '/tmp/metona-outside-t.txt';
    const r = (await move.execute(
      { source_path: 'from.txt', destination_path: otherDrive },
      c(),
    )) as { success: boolean };
    expect(r.success).toBe(false);
  });

  it('覆盖移动：overwrite=true 时目标文件被替换', async () => {
    const r = (await move.execute(
      { source_path: 'from.txt', destination_path: 'dest-dir/existing.txt', overwrite: true },
      c(),
    )) as { success: boolean; overwritten?: boolean };
    expect(r.success).toBe(true);
    expect(r.overwritten).toBe(true);
    expect(readText(join(ws, 'dest-dir', 'existing.txt'))).toBe('payload');
    expect(existsP(join(ws, 'from.txt'))).toBe(false);
  });

  it('目标已存在且 overwrite=false → 拒绝', async () => {
    writeFileSync(join(ws, 'src-exists.txt'), 's');
    const r = (await move.execute(
      { source_path: 'src-exists.txt', destination_path: 'dest-dir/existing.txt' },
      c(),
    )) as { success: boolean; error?: string };
    expect(r.success).toBe(false);
    expect(String((r as { error?: string }).error)).toContain('already exists');
  });

  it('工作空间根目录不可移动', async () => {
    const r = (await move.execute({ source_path: '.', destination_path: 'sub' }, c())) as {
      success: boolean;
    };
    expect(r.success).toBe(false);
  });

  it('目录移动 isDirectory=true（同工作空间内）', async () => {
    const r = (await move.execute(
      { source_path: 'dir-to-move', destination_path: 'renamed-dir' },
      c(),
    )) as { success: boolean; isDirectory?: boolean };
    expect(r.success).toBe(true);
    expect(r.isDirectory).toBe(true);
    expect(readText(join(ws, 'renamed-dir', 'inner.txt'))).toBe('i');
    expect(existsP(join(ws, 'dir-to-move'))).toBe(false);
  });

  it('自动创建目标父目录', async () => {
    writeFileSync(join(ws, 'leaf.txt'), 'l');
    const r = (await move.execute(
      { source_path: 'leaf.txt', destination_path: 'deep/parent/leaf2.txt' },
      c(),
    )) as { success: boolean };
    expect(r.success).toBe(true);
    expect(readText(join(ws, 'deep', 'parent', 'leaf2.txt'))).toBe('l');
  });

  it('源不存在 → Source not found', async () => {
    const r = (await move.execute(
      { source_path: 'ghost.txt', destination_path: 'out.txt' },
      c(),
    )) as { success: boolean };
    expect(r.success).toBe(false);
  });

  it('缺参数（source/destination 任一缺失）→ 报错', async () => {
    const missing = (await move.execute({ source_path: 'a.txt' }, c())) as { success: boolean };
    expect(missing.success).toBe(false);
  });

  it('file_info 返回 size/类型探测字段（PNG magic → is_binary=false）', async () => {
    const r = (await info.execute({ file_path: 'png-like.bin' }, c())) as Record<string, unknown>;
    expect(r.success).toBe(true);
    expect(Number(r.size)).toBe(6);
    expect(r.type).toBe('file');
    expect(String(r.mode)).toMatch(/^\d+$/); // 八进制权限位
  });

  it('file_info 对 UTF-16 文件报告 is_binary=true（NUL 字节探测；无 encoding 字段）', async () => {
    const r = (await info.execute({ file_path: 'utf16-info.bin' }, c())) as Record<string, unknown>;
    expect(r.success).toBe(true);
    expect(r.is_binary).toBe(true);
    expect(r.encoding).toBeUndefined();
  });

  it('file_info 对二进制文件报告 is_binary=true', async () => {
    writeFileSync(join(ws, 'true-bin.bin'), Buffer.from([0x00, 0x01, 0x02]));
    const r = (await info.execute({ file_path: 'true-bin.bin' }, c())) as Record<string, unknown>;
    expect(r.is_binary).toBe(true);
  });

  it('file_info 对目录返回 type=directory', async () => {
    const r = (await info.execute({ file_path: 'dest-dir' }, c())) as Record<string, unknown>;
    expect(r.success).toBe(true);
    expect(r.type).toBe('directory');
  });

  it('file_info 文件不存在 → File not found', async () => {
    const r = (await info.execute({ file_path: 'nope-info.txt' }, c())) as { success: boolean };
    expect(r.success).toBe(false);
  });

  it('file_info 路径越界 → 拒绝', async () => {
    const outside = process.platform === 'win32' ? 'C:\\Windows\\notepad.exe' : '/etc/passwd';
    const r = (await info.execute({ file_path: outside }, c())) as { success: boolean };
    expect(r.success).toBe(false);
  });

  it('file_info 普通文本文件 → encoding 存在且非空', async () => {
    writeFileSync(join(ws, 'plain.txt'), 'hello');
    const r = (await info.execute({ file_path: 'plain.txt' }, c())) as Record<string, unknown>;
    expect(r.success).toBe(true);
    expect(String(r.encoding)).toMatch(/utf-8/);
    expect(r.is_binary).toBe(false);
  });
});