const axios = require('axios');
const qs = require('qs');
const cheerio = require('cheerio');

const fdown = {
  getToken: async () => {
    try {
      const response = await axios.get('https://fdown.net', {
        headers: {
          'User-Agent': 'Mozilla/5.0 (Android 10; Mobile; rv:131.0) Gecko/131.0 Firefox/131.0',
          'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/png,image/svg+xml,*/*;q=0.8',
          'Accept-Language': 'id-ID',
          'Upgrade-Insecure-Requests': '1',
        }
      });
      const html = response.data;
      const $ = cheerio.load(html);
      const token_v = $('input[name="token_v"]').val();
      const token_c = $('input[name="token_c"]').val();
      const token_h = $('input[name="token_h"]').val();

      return { token_v, token_c, token_h };
    } catch (error) {
      throw new Error(`Error fetching tokens: ${error.message}`);
    }
  },

  request: async (url) => {
    const { token_v, token_c, token_h } = await fdown.getToken();
    const data = qs.stringify({
      'URLz': url,
      'token_v': token_v,
      'token_c': token_c,
      'token_h': token_h
    });

    const config = {
      method: 'POST',
      url: 'https://fdown.net/download.php',
      headers: {
        'User-Agent': 'Mozilla/5.0 (Android 10; Mobile; rv:131.0) Gecko/131.0 Firefox/131.0',
        'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/png,image/svg+xml,*/*;q=0.8',
        'Content-Type': 'application/x-www-form-urlencoded',
        'accept-language': 'id-ID',
        'referer': 'https://fdown.net/',
      },
      data: data
    };
    const api = await axios.request(config);
    return api.data;
  },

  download: async (url) => {
    try {
        const data = await fdown.request(url);
        const $ = cheerio.load(data);
        
        // Cek jika error (biasanya private video atau link salah)
        if ($('.alert-danger').length > 0) {
            throw new Error("Video is private or URL is invalid");
        }

        const title = $('.lib-row.lib-header').text().trim() || "Facebook Video";
        const description = $('.lib-row.lib-desc').text().trim() || "No Description";
        const sdLink = $('#sdlink').attr('href');
        const hdLink = $('#hdlink').attr('href');

        if (!sdLink && !hdLink) {
            throw new Error("No download links found");
        }

        return {
            title: title,
            description: description,
            sd: sdLink || "",
            hd: hdLink || ""
        };
    } catch (e) {
        throw e;
    }
  }
};

module.exports = { fdown };