// plugin/hooks/hooks-app/__tests__/context.test.ts
import { discoverContextFile } from '../src/context';
import * as fs from 'fs/promises';
import * as path from 'path';
import * as os from 'os';

describe('Context Injection', () => {
  let testDir: string;

  beforeEach(async () => {
    testDir = await fs.mkdtemp(path.join(os.tmpdir(), 'hooks-test-'));
  });

  afterEach(async () => {
    await fs.rm(testDir, { recursive: true, force: true });
  });

  test('returns null when no context file exists', async () => {
    const result = await discoverContextFile(testDir, 'test-command', 'start');
    expect(result).toBeNull();
  });

  test('discovers flat context file', async () => {
    const contextDir = path.join(testDir, '.claude', 'context');
    await fs.mkdir(contextDir, { recursive: true });
    await fs.writeFile(path.join(contextDir, 'test-command-start.md'), 'content');

    const result = await discoverContextFile(testDir, 'test-command', 'start');
    expect(result).toBe(path.join(contextDir, 'test-command-start.md'));
  });

  test('discovers slash-command subdirectory', async () => {
    const contextDir = path.join(testDir, '.claude', 'context', 'slash-command');
    await fs.mkdir(contextDir, { recursive: true });
    await fs.writeFile(path.join(contextDir, 'test-command-start.md'), 'content');

    const result = await discoverContextFile(testDir, 'test-command', 'start');
    expect(result).toBe(path.join(contextDir, 'test-command-start.md'));
  });

  test('discovers nested slash-command directory', async () => {
    const contextDir = path.join(testDir, '.claude', 'context', 'slash-command', 'test-command');
    await fs.mkdir(contextDir, { recursive: true });
    await fs.writeFile(path.join(contextDir, 'start.md'), 'content');

    const result = await discoverContextFile(testDir, 'test-command', 'start');
    expect(result).toBe(path.join(contextDir, 'start.md'));
  });

  test('discovers skill context', async () => {
    const contextDir = path.join(testDir, '.claude', 'context', 'skill');
    await fs.mkdir(contextDir, { recursive: true });
    await fs.writeFile(path.join(contextDir, 'test-skill-start.md'), 'content');

    const result = await discoverContextFile(testDir, 'test-skill', 'start');
    expect(result).toBe(path.join(contextDir, 'test-skill-start.md'));
  });

  test('follows priority order - flat wins', async () => {
    const contextBase = path.join(testDir, '.claude', 'context');
    await fs.mkdir(path.join(contextBase, 'slash-command'), { recursive: true });

    await fs.writeFile(path.join(contextBase, 'test-command-start.md'), 'flat');
    await fs.writeFile(path.join(contextBase, 'slash-command', 'test-command-start.md'), 'subdir');

    const result = await discoverContextFile(testDir, 'test-command', 'start');
    expect(result).toBe(path.join(contextBase, 'test-command-start.md'));
  });
});