// countries.js — country data helpers (inline, no fetch needed)

const Countries = (() => {
  const COUNTRIES_DATA = [
    {
      "name": "Switzerland",
      "hint": "Alpine country in Central Europe",
      "cities": [
        { "name": "Bern",   "x": 48, "y": 58 },
        { "name": "Zürich", "x": 58, "y": 38 },
        { "name": "Geneva", "x": 22, "y": 72 }
      ]
    },
    {
      "name": "Norway",
      "hint": "Scandinavian country with long coastline",
      "cities": [
        { "name": "Oslo",   "x": 55, "y": 72 },
        { "name": "Bergen", "x": 32, "y": 60 },
        { "name": "Tromsø", "x": 62, "y": 18 }
      ]
    },
    {
      "name": "Italy",
      "hint": "Boot-shaped peninsula in Southern Europe",
      "cities": [
        { "name": "Rome",   "x": 52, "y": 58 },
        { "name": "Milan",  "x": 42, "y": 22 },
        { "name": "Naples", "x": 58, "y": 72 }
      ]
    },
    {
      "name": "Japan",
      "hint": "Island nation in East Asia",
      "cities": [
        { "name": "Tokyo",   "x": 72, "y": 48 },
        { "name": "Osaka",   "x": 58, "y": 58 },
        { "name": "Sapporo", "x": 70, "y": 22 }
      ]
    },
    {
      "name": "Brazil",
      "hint": "Largest country in South America",
      "cities": [
        { "name": "Brasília",  "x": 58, "y": 52 },
        { "name": "São Paulo", "x": 60, "y": 68 },
        { "name": "Manaus",    "x": 38, "y": 38 }
      ]
    },
    {
      "name": "Australia",
      "hint": "Continent and country in the Southern Hemisphere",
      "cities": [
        { "name": "Canberra", "x": 72, "y": 72 },
        { "name": "Sydney",   "x": 78, "y": 68 },
        { "name": "Perth",    "x": 22, "y": 65 }
      ]
    },
    {
      "name": "France",
      "hint": "Western Europe, roughly hexagonal shape",
      "cities": [
        { "name": "Paris",     "x": 50, "y": 32 },
        { "name": "Lyon",      "x": 58, "y": 55 },
        { "name": "Marseille", "x": 58, "y": 72 }
      ]
    },
    {
      "name": "India",
      "hint": "Large peninsula in South Asia",
      "cities": [
        { "name": "New Delhi", "x": 46, "y": 28 },
        { "name": "Mumbai",    "x": 32, "y": 55 },
        { "name": "Chennai",   "x": 52, "y": 72 }
      ]
    },
    {
      "name": "Canada",
      "hint": "Second largest country in the world",
      "cities": [
        { "name": "Ottawa",    "x": 62, "y": 52 },
        { "name": "Vancouver", "x": 22, "y": 55 },
        { "name": "Toronto",   "x": 60, "y": 58 }
      ]
    },
    {
      "name": "Germany",
      "hint": "Central European country",
      "cities": [
        { "name": "Berlin",  "x": 58, "y": 28 },
        { "name": "Munich",  "x": 48, "y": 68 },
        { "name": "Hamburg", "x": 42, "y": 18 }
      ]
    }
  ];

  let _data = [];

  async function loadCountries() {
    if (_data.length) return _data;
    _data = COUNTRIES_DATA;
    return _data;
  }

  function getRandomCountries(count = 3) {
    const shuffled = [..._data].sort(() => Math.random() - 0.5);
    return shuffled.slice(0, count);
  }

  function getCities(countryName) {
    const c = _data.find(c => c.name === countryName);
    return c ? c.cities : [];
  }

  return { loadCountries, getRandomCountries, getCities };
})();