const express = require('express');
const router = express.Router();
const { db } = require('../db');

router.get('/', (req, res) => {
  const category = req.query.category;
  const sort = req.query.sort || 'desc';
  const lang = req.query.lang;
  
  let query = `SELECT * FROM articles WHERE status = 'published'`;
  const params = [];
  
  if (category) {
    query += ` AND categories LIKE ?`;
    params.push(`%"${category}"%`);
  }
  
  if (lang) {
    query += ` AND COALESCE(language, source_language, 'fr') = ?`;
    params.push(lang);
  }
  
  query += ` ORDER BY datetime(published_at) ${sort === 'asc' ? 'ASC' : 'DESC'}, datetime(created_at) DESC`;
  
  const articles = db.prepare(query).all(...params);
  
  // Récupérer les catégories uniques
  let catQuery = `SELECT categories FROM articles WHERE status = 'published' AND categories IS NOT NULL`;
  const catParams = [];
  if (lang) {
    catQuery += ` AND COALESCE(language, source_language, 'fr') = ?`;
    catParams.push(lang);
  }
  const allArticles = db.prepare(catQuery).all(...catParams);
  const categoriesSet = new Set();
  allArticles.forEach(a => {
    try {
      const cats = JSON.parse(a.categories);
      if (Array.isArray(cats)) {
        cats.forEach(c => categoriesSet.add(c));
      }
    } catch(e) {}
  });
  const categories = Array.from(categoriesSet).sort();
  
  // Récupérer les langues disponibles
  const langRows = db.prepare(`SELECT DISTINCT COALESCE(language, source_language, 'fr') as lang FROM articles WHERE status = 'published' ORDER BY lang`).all();
  const languages = langRows.map(r => r.lang).filter(Boolean);
  
  res.render('index', { articles, categories, selectedCategory: category, sort, languages, selectedLang: lang });
});

module.exports = router;