import express from 'express';
import { query } from '../db/index.js';
import { authMiddleware } from '../middleware/auth.js';
import { asyncHandler, AppError } from '../middleware/errorHandler.js';

const router = express.Router();

// Search for shows/movies via TMDB with caching
router.get('/search', authMiddleware, asyncHandler(async (req, res) => {
  const { q } = req.query;

  if (!q || q.trim().length < 2) {
    return res.json({ results: [] });
  }

  const searchQuery = q.trim();

  // Check cache first
  const cached = await query(
    'SELECT response_data FROM tmdb_cache WHERE query = ? AND media_type = ? AND cached_at > DATE_SUB(NOW(), INTERVAL 7 DAY)',
    [searchQuery, 'multi']
  );

  if (cached.length > 0) {
    return res.json(JSON.parse(cached[0].response_data));
  }

  // Fetch from TMDB
  const apiKey = process.env.TMDB_API_KEY;
  if (!apiKey) {
    throw new AppError('TMDB API key not configured', 500);
  }

  const fetch = (await import('node-fetch')).default;
  const response = await fetch(
    `https://api.themoviedb.org/3/search/multi?api_key=${apiKey}&query=${encodeURIComponent(searchQuery)}`
  );

  if (!response.ok) {
    const errorText = await response.text();
    console.error('TMDB API error:', response.status, errorText);
    throw new AppError(`TMDB API error: ${response.status}`, 500);
  }

  const data = await response.json();

  // Filter to only movies and TV shows
  const filtered = data.results
    .filter(item => item.media_type === 'movie' || item.media_type === 'tv')
    .map(item => ({
      id: item.id,
      title: item.media_type === 'movie' ? item.title : item.name,
      media_type: item.media_type,
      poster_path: item.poster_path,
      backdrop_path: item.backdrop_path,
      release_date: item.release_date || item.first_air_date,
      overview: item.overview
    }))
    .slice(0, 10);

  const result = { results: filtered };

  // Cache the result
  await query(
    'INSERT INTO tmdb_cache (query, media_type, response_data) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE response_data = ?, cached_at = NOW()',
    [searchQuery, 'multi', JSON.stringify(result), JSON.stringify(result)]
  );

  res.json(result);
}));

export default router;