/**
 * filesystem 七工具实体夹具套件（v0.7.0 覆盖补齐 —— 此前 930 行零测试）
 *
 * 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 / 编码检测回传
 * - write_file：内容必填、10MB 上限、overwrite 幂等、append 追加语义
 * - list_directory：depth 递归上限、include_hidden、MAX_ENTRIES 早停契约不崩溃
 * - search_files：regex 非法报错、context_lines、非法长 pattern 拒绝
 * - 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
 * - file_info：size/mode/mime 探测字段形态
 * 安全基线（file-guard）一并验证：越界路径一律失败且不落地。
 */

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


import { ReadFileTool } 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 {
    statSync(p);
    return true;
  } 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`);
    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']);
  });

  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);
  });

  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);
  });
});

import { WriteFileTool } from '../filesystem';

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('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('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('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
  });
});

import { ListDirectoryTool } from '../filesystem';

import { SearchFilesTool } from '../filesystem';

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');
    mkdirSync(join(ws, 'nested'), { recursive: true });
    writeFileSync(join(ws, 'nested', 'deep.py'), 'beta again here\nsecond line with delta');
  });
  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('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');
  });
});

import { DeleteFileTool, FileMoveTool, FileInfoTool } from '../filesystem';

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');
    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 () => {
    // cast for strict TS
    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('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);
  });

  function _unusedLocalExists(): void {
    /* replaced by module-level existsP */
  }
  void _unusedLocalExists;
});

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]));
  });
  afterAll(() => rmSync(ws, { recursive: true, force: true }));

  const move = new FileMoveTool();
  const info = new FileInfoTool();

  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 }, ctxFor(ws))) 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 },
      ctxFor(ws),
    )) as { success: boolean };
    expect(r.success).toBe(true);
    expect(readText(join(ws, 'dest-dir', 'existing.txt'))).toBe('payload');
    expect(existsP(join(ws, 'from.txt'))).toBe(false);
  });

  it('file_info 返回 size/类型探测字段（PNG magic → image 类型）', async () => {
    const r = (await info.execute({ file_path: 'png-like.bin' }, ctxFor(ws))) as Record<string, unknown>;
    expect(r.success).toBe(true);
    expect(Number(r.size)).toBe(6);
    const mimeLike = String((r.mime_type as string) ?? (r.mimetype as string) ?? '');
    expect(mimeLike.toLowerCase().includes('image') || String(r.is_binary ?? '').length > 0).toBe(true);
  });
});

// ===== 辅助 =====