import { describe, it, expect, vi, beforeEach } from 'vitest';
import { loadProvider } from '../src/providers/provider.mjs';
import { OllamaProvider } from '../src/providers/ollama_provider.mjs';
import { OpenAIProvider } from '../src/providers/openai_provider.mjs';
import { HttpProvider } from '../src/providers/http_provider.mjs';

vi.stubGlobal("fetch", vi.fn(async () => ({
  ok: true,
  json: async () => ({ response: "OK" })
})));

describe("provider system", () => {

  beforeEach(() => {
    vi.clearAllMocks();
  });

  it("loads Ollama provider", () => {
    process.env.PROVIDER_TYPE = "ollama";
    const p = loadProvider();
    expect(p).toBeInstanceOf(OllamaProvider);
  });

  it("loads OpenAI provider", () => {
    process.env.PROVIDER_TYPE = "openai";
    process.env.OPENAI_API_KEY = "test";
    const p = loadProvider();
    expect(p).toBeInstanceOf(OpenAIProvider);
  });

  it("loads HTTP provider", () => {
    process.env.PROVIDER_TYPE = "http";
    const p = loadProvider();
    expect(p).toBeInstanceOf(HttpProvider);
  });

  it("provider.generate() returns mocked content", async () => {
    process.env.PROVIDER_TYPE = "ollama";
    const p = loadProvider();
    const out = await p.generate("hello");
    expect(out).toBe("OK");
  });

});