import { describe, expect, it, vi } from 'vitest';
import Fastify from 'fastify';
import { RecommendationsController } from '../../../src/app/controllers/RecommendationsController';
import type { AppConfig } from '../../../src/app/config/AppConfig';
import type { RecommendationPipeline } from '../../../src/app/pipelines/RecommendationPipeline';

function makeApp(config: Partial<AppConfig>, pipeline: Partial<RecommendationPipeline>) {
  const app = Fastify();
  new RecommendationsController(config as AppConfig, pipeline as RecommendationPipeline).register(app);
  return app;
}

describe('RecommendationsController', () => {
  it('GET /recommendations runs the pipeline with the configured count and LLM flag', async () => {
    const runAsync = vi.fn().mockResolvedValue([{ title: 'Dune', year: 2021, tmdbId: 1, reason: 'r' }]);
    const app = makeApp({ RECOMMEND_COUNT: 10, LLM_ENABLED: true }, { runAsync } as unknown as RecommendationPipeline);

    const res = await app.inject({ method: 'GET', url: '/recommendations' });
    expect(res.statusCode).toBe(200);
    expect(runAsync).toHaveBeenCalledWith({ count: 10, useLlm: true });
  });

  it('GET /recommendations?count= and force_llm/force_tmdb override config', async () => {
    const runAsync = vi.fn().mockResolvedValue([]);
    const app = makeApp({ RECOMMEND_COUNT: 10, LLM_ENABLED: false }, { runAsync } as unknown as RecommendationPipeline);

    await app.inject({ method: 'GET', url: '/recommendations?count=3&force_llm=true' });
    expect(runAsync).toHaveBeenCalledWith({ count: 3, useLlm: true });
  });

  it('falls back to the configured count for a malformed or non-positive count query param', async () => {
    const runAsync = vi.fn().mockResolvedValue([]);
    const app = makeApp({ RECOMMEND_COUNT: 10, LLM_ENABLED: true }, { runAsync } as unknown as RecommendationPipeline);

    await app.inject({ method: 'GET', url: '/recommendations?count=abc' });
    expect(runAsync).toHaveBeenCalledWith({ count: 10, useLlm: true });

    await app.inject({ method: 'GET', url: '/recommendations?count=-5' });
    expect(runAsync).toHaveBeenCalledWith({ count: 10, useLlm: true });

    await app.inject({ method: 'GET', url: '/recommendations?count=0' });
    expect(runAsync).toHaveBeenCalledWith({ count: 10, useLlm: true });
  });

  it('POST /recommendations/trigger auto-requests via Radarr when enabled', async () => {
    const recs = [{ title: 'Dune', year: 2021, tmdbId: 1, reason: 'r' }];
    const runAsync = vi.fn().mockResolvedValue(recs);
    const autoRequest = vi.fn().mockResolvedValue(undefined);
    const app = makeApp(
      { RECOMMEND_COUNT: 10, LLM_ENABLED: true, RADARR_ENABLED: true },
      { runAsync, autoRequest } as unknown as RecommendationPipeline
    );

    const res = await app.inject({ method: 'POST', url: '/recommendations/trigger' });
    expect(res.statusCode).toBe(200);
    expect(autoRequest).toHaveBeenCalledWith(recs);
  });

  it('POST /recommendations/search requires LLM to be enabled and a query body', async () => {
    const app = makeApp({ LLM_ENABLED: false }, {} as RecommendationPipeline);
    const res = await app.inject({ method: 'POST', url: '/recommendations/search', payload: { query: 'x' } });
    expect(res.statusCode).toBe(400);
  });

  it('POST /recommendations/search runs pipeline.searchAsync and returns results', async () => {
    const searchAsync = vi.fn().mockResolvedValue([{ title: 'Dune', year: 2021, tmdbId: 1, reason: 'r' }]);
    const app = makeApp(
      { LLM_ENABLED: true, RECOMMEND_COUNT: 10 },
      { searchAsync } as unknown as RecommendationPipeline
    );

    const res = await app.inject({
      method: 'POST',
      url: '/recommendations/search',
      payload: { query: 'sci-fi like Blade Runner' },
    });
    expect(res.statusCode).toBe(200);
    expect(searchAsync).toHaveBeenCalledWith('sci-fi like Blade Runner', 10);
  });
});