/**
 * Integration Test Harness: replace_symbol Round-trip
 *
 * This test loops over fixtures in ontoindex/test/fixtures/replace-symbol/,
 * calls the replace_symbol tool, and verifies that the resulting code matches
 * the expected output.
 *
 * NOTE: This is initially skipped (.skip) until the senior developer
 * completes the AST-based implementation of the tool handler.
 */
import { describe, it, expect, beforeEach, vi } from 'vitest';
import fs from 'node:fs/promises';
import path from 'node:path';

// Mock the LadybugDB and RepoManager for these integration tests
// because we are testing the tool's coordination logic and file editing,
// not the graph database itself.
vi.mock('../../src/core/lbug/pool-adapter.js', () => ({
  initLbug: vi.fn().mockResolvedValue(undefined),
  executeQuery: vi.fn().mockResolvedValue([]),
  executeParameterized: vi.fn().mockResolvedValue([]),
  closeLbug: vi.fn().mockResolvedValue(undefined),
  isLbugReady: vi.fn().mockReturnValue(true),
  isWriteQuery: vi.fn().mockReturnValue(false),
}));

vi.mock('../../src/storage/repo-manager.js', () => ({
  listRegisteredRepos: vi.fn().mockResolvedValue([
    {
      name: 'test-repo',
      path: process.cwd(),
      storagePath: path.join(process.cwd(), '.ontoindex/test-repo'),
      indexedAt: new Date().toISOString(),
      lastCommit: 'HEAD',
      stats: { files: 10, nodes: 100 },
    },
  ]),
}));

import { LocalBackend } from '../../src/mcp/local/local-backend.js';

describe.skip('replace_symbol round-trip fixtures', () => {
  let backend: LocalBackend;
  const fixturesDir = path.join(process.cwd(), 'ontoindex/test/fixtures/replace-symbol');

  beforeEach(async () => {
    backend = new LocalBackend({ confirmWrites: true });
    await backend.init();
  });

  const cases = [
    'ts-decorator',
    'ts-template-literal',
    'ts-as-const',
    'ts-generic',
    'ts-arrow',
    'ts-class-method',
    'ts-async',
    'ts-overload',
    'ts-default-export',
    'ts-mixed',
  ];

  it.each(cases)('correctly replaces body for %s', async (caseName) => {
    const inputPath = path.join(fixturesDir, `${caseName}.in.ts`);
    const expectedPath = path.join(fixturesDir, `${caseName}.expected.ts`);

    const inputContent = await fs.readFile(inputPath, 'utf-8');
    const expectedContent = await fs.readFile(expectedPath, 'utf-8');

    // In a real integration test, replace_symbol would:
    // 1. Look up the symbol via UID in the graph (mocked here or using a real test DB)
    // 2. Read the source file
    // 3. Use tree-sitter to find the body boundaries
    // 4. Splice in the new body
    // 5. Return the full content (or a diff)

    // For the harness, we simulate the tool call.
    // The UID format is usually Label:name
    const uid = `Function:${caseName}`;

    // Note: new_body should be extracted from the expected file for a true round-trip test,
    // or hardcoded if we know what we put in the fixtures.
    // Here we assume the fixture creation used a predictable replacement.
    const newBody = 'return "replaced";';

    const result = await backend.callTool('replace_symbol', {
      uid,
      new_body: newBody,
      dry_run: false,
      confirm: true,
      repo: 'test-repo',
    });

    expect(result.success).toBe(true);

    // After the implementation is ready, we would check the file content on disk
    // or the returned diff. For now, this harness is the shell.
    if (result.content) {
      expect(result.content).toBe(expectedContent);
    }
  });
});
