import { describe, it, expect, vi, afterEach } from 'vitest';
import { chatPublic } from '../local-client';

describe('chatPublic', () => {
  afterEach(() => {
    vi.unstubAllGlobals();
  });

  it('turns a network/CORS-level failure into an actionable message naming the Base URL', async () => {
    vi.stubGlobal('fetch', vi.fn().mockRejectedValue(new TypeError('Failed to fetch')));

    await expect(
      chatPublic('https://platform.deepseek.com/', 'sk-test', 'deepseek-chat', [
        { role: 'user', content: 'hi' },
      ]),
    ).rejects.toThrow(/Could not reach https:\/\/platform\.deepseek\.com\/chat\/completions/);
  });

  it('still reports the provider-returned status when the request completes', async () => {
    vi.stubGlobal(
      'fetch',
      vi.fn().mockResolvedValue({ ok: false, status: 401, json: async () => ({}) }),
    );

    await expect(
      chatPublic('https://api.deepseek.com', 'sk-bad', 'deepseek-chat', [
        { role: 'user', content: 'hi' },
      ]),
    ).rejects.toThrow('Provider returned 401');
  });

  it('returns the message content on success', async () => {
    vi.stubGlobal(
      'fetch',
      vi.fn().mockResolvedValue({
        ok: true,
        status: 200,
        json: async () => ({ choices: [{ message: { content: 'hello there' } }] }),
      }),
    );

    await expect(
      chatPublic('https://api.deepseek.com', 'sk-good', 'deepseek-chat', [
        { role: 'user', content: 'hi' },
      ]),
    ).resolves.toBe('hello there');
  });
});