api.js

const https = require('https');

const API_URL = 'https://www.holidayextras.com/dock-yard/hapi/hotels/?productType=hotels&agent=WY992&out_flight=FR4076&campaign_id=65642&launch_id=rddef100&lang=en&location=MAN&airport=MAN&check_in=2026-05-09&returning=2026-05-10&terminal=3&token=7f5ad91e-0c07-48da-9133-518caaf24a41&sid=b0664570458711f1b75aad14ee535e33&room_types%5B0%5D=D20';

function fetchJson(url) {
  return new Promise((resolve, reject) => {
    https.get(url, (res) => {
      let data = '';
      res.on('data', chunk => { data += chunk; });
      res.on('end', () => {
        try { resolve(JSON.parse(data)); }
        catch (e) { reject(new Error(`JSON parse failed: ${e.message}`)); }
      });
    }).on('error', reject);
  });
}

function deriveHighlight(product) {
  if (product.time_to_terminal) {
    const t = product.time_to_terminal.toLowerCase();
    if (t.includes('walk')) return t.replace('minutes', 'min');
    if (t.includes('shuttle')) return 'Free shuttle included';
  }
  if (product.transfers?.included_in_price && product.transfers?.price === 'free') {
    const mins = product.transfers.travel_time;
    if (mins && parseInt(mins) <= 3) return `${mins}-min walk to terminal`;
    return 'Free hotel shuttle';
  }
  if (product.on_airport) return 'On the airport';
  if (product.distance_miles_string && product.distance_miles_string !== 'null') {
    return `${product.distance_miles_string} miles to airport`;
  }
  return null;
}

function deriveLocation(product) {
  if (product.on_airport) return 'On the airport grounds';
  if (product.distance_miles_string && product.distance_miles_string !== 'null') {
    return `${product.distance_miles_string} miles to the airport`;
  }
  return product.location?.name || '';
}

function deriveBadges(product) {
  const badges = [];
  if (product.cancellation?.is_refundable || product.is_refundable) {
    badges.push('Flextras: Free Cancellation');
  }
  badges.push('Never Beaten on Price');
  badges.push('15% Off Travel Insurance');
  if (product.recommended) badges.push('Tried, Tested, Recommended');
  badges.push('The Extracare Guarantee');
  return badges;
}

function imageUrl(raw) {
  if (!raw) return null;
  return raw.startsWith('//') ? `https:${raw}` : raw;
}

function groupByHotel(products) {
  const groups = new Map();

  for (const p of products) {
    const key = p.brand_name;
    if (!groups.has(key)) {
      groups.set(key, { cheapest: p, packages: [] });
    }
    const g = groups.get(key);
    if (p.price < g.cheapest.price) g.cheapest = p;
    g.packages.push(p);
  }

  return Array.from(groups.values()).map(({ cheapest: p, packages }) => ({
    id: p.unprefixedCode.toLowerCase(),
    name: p.brand_name,
    stars: p.star_rating || null,
    imageUrl: imageUrl(p.brand_image || p.logo),
    highlight: deriveHighlight(p),
    location: deriveLocation(p),
    price: (p.price / 100).toFixed(2),
    rating: parseFloat(p.score?.score) || null,
    badges: deriveBadges(p),
    description: p.sales_introduction || '',
    packageCount: packages.length,
    links: {
      map:      `/hotel/${p.unprefixedCode.toLowerCase()}/map`,
      photos:   `/hotel/${p.unprefixedCode.toLowerCase()}/photos`,
      packages: `/hotel/${p.unprefixedCode.toLowerCase()}/packages`,
      reviews:  `/hotel/${p.unprefixedCode.toLowerCase()}/reviews`,
    },
  }));
}

async function getHotels() {
  const raw = await fetchJson(API_URL);
  return groupByHotel(raw);
}

module.exports = { getHotels };