import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { embedText, padTo, OllamaError } from '../../lib/ai/ollama.js';

beforeEach(() => {
  global.fetch = vi.fn(async () => new Response(
    JSON.stringify({ embedding: new Array(768).fill(0.1) }),
    { status: 200, headers: { 'content-type': 'application/json' }}
  ));
});
afterEach(() => vi.restoreAllMocks());

describe('ollama.embedText', () => {
  it('returns 768-dim vector', async () => {
    const v = await embedText('hello');
    expect(v).toHaveLength(768);
    expect(v[0]).toBeCloseTo(0.1, 5);
  });

  it('throws OllamaError on non-200', async () => {
    global.fetch = vi.fn(async () => new Response('boom', { status: 502 }));
    await expect(embedText('x')).rejects.toThrow(OllamaError);
  });
});

describe('padTo', () => {
  it('pads short vectors with zeros', () => {
    const v = padTo([1, 2, 3], 5);
    expect(v).toEqual([1, 2, 3, 0, 0]);
  });
  it('truncates long vectors', () => {
    expect(padTo([1, 2, 3, 4, 5], 3)).toEqual([1, 2, 3]);
  });
  it('returns same on exact length', () => {
    expect(padTo([1, 2], 2)).toEqual([1, 2]);
  });
});