import { QueryExpander, QueryType } from '../queryExpander';

describe('QueryExpander', () => {
  const expander = new QueryExpander({ expansionDegree: 2 });

  it('should classify queries correctly', () => {
    expect(expander.classify('What is AI?')).toBe('factual');
    expect(expander.classify('Explain quantum computing')).toBe('conceptual');
    expect(expander.classify('How to bake bread')).toBe('procedural');
    expect(expander.classify('AI?')).toBe('ambiguous');
    expect(expander.classify('Custom query')).toBe('other');
  });

  it('should expand queries based on type', () => {
    expect(expander.expand('AI?', 'ambiguous')).toContain('자세히 설명');
    expect(expander.expand('What is AI?', 'factual')).toContain('정확한 정보');
    expect(expander.expand('Explain quantum computing', 'conceptual')).toContain('정의, 배경');
    expect(expander.expand('How to bake bread', 'procedural')).toContain('단계별 설명');
  });

  it('should reformulate queries for vector search', () => {
    const q = 'What is the process of baking bread in the oven?';
    const reform = expander.reformulate(q);
    expect(reform).not.toMatch(/\bthe\b|\bof\b|\bin\b|\bis\b/);
    expect(reform.length).toBeLessThan(q.length);
  });

  it('should store feedback if enabled', () => {
    expander.feedback('AI?', 'AI 자세히 설명', true, 'Good result');
    expect(expander.getFeedbacks().length).toBeGreaterThan(0);
  });
});