/**
 * GeoGraSim Plattform-Standard: Mini-Onboarding
 * ==============================================
 * Für Sims, die KEIN volles Tutorial haben aber Lernenden trotzdem einen
 * kurzen Einstieg geben sollen: ein einfaches Modal mit Headline, Lead,
 * 2-4 Bullet-Schritten und optionalen Lernzielen.
 *
 * USAGE in der Sim:
 *   <script src="/assets/js/ggs-quick-intro.js" defer></script>
 *   <script>
 *     window.addEventListener('DOMContentLoaded', () => {
 *       GgsQuickIntro.init({
 *         simId:   'busfahrt',
 *         title:   '🚌 Busfahrt',
 *         lead:    'Du übernimmst Aufträge und transportierst Passagiere durch Europa.',
 *         steps:   [
 *           'Auftrag wählen (links) — du siehst Stadt, Distanz und Bezahlung.',
 *           'Auf der Karte das richtige Ziel anklicken — Genauigkeit zählt.',
 *           'Quiz beantworten — Hauptstadt + Land — sammelt Bonus.',
 *           'Budget hochhalten, Aufträge gewinnen, Stufen freischalten.',
 *         ],
 *         goals:   [
 *           'Europäische Hauptstädte und Länder zuordnen',
 *           'Distanzen einschätzen',
 *           'Wirtschaftlich planen (Treibstoff, Marge)',
 *         ],
 *       });
 *     });
 *   </script>
 *
 * VERHALTEN:
 *   - Beim 1. Besuch (kein localStorage-Key) öffnet sich das Modal automatisch.
 *   - Schließen → localStorage merkt sich „gesehen" (key: ggs.intro.<simId>).
 *   - Registriert automatisch `window.GGS_TUTORIAL.replay()` als Plattform-API,
 *     damit der globale ℹ-Button im Header das Modal erneut öffnen kann.
 *   - „Anleitung erneut öffnen" verfügbar via `GgsQuickIntro.open()` oder
 *     `window.GGS_TUTORIAL.replay()`.
 *
 * STYLE: CSS wird automatisch injiziert. Mobile-first, iPad-tauglich,
 * Esc + Tap-outside schließt.
 *
 * KOMPATIBILITÄT: Pure Vanilla-JS. Funktioniert mit existierendem
 * Glossar-Tooltip-Pattern und GGS_TUTORIAL-Convention.
 */
(function () {
  'use strict';

  var CSS = ''
    + '.ggs-qi-back{position:fixed;inset:0;background:rgba(20,30,30,.55);display:flex;align-items:center;justify-content:center;z-index:9998;padding:2vw;animation:ggs-qi-fade .2s ease-out}'
    + '.ggs-qi-modal{background:#fff;border-radius:14px;max-width:520px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:0 18px 40px rgba(0,0,0,.28);font-family:inherit;animation:ggs-qi-pop .22s ease-out;-webkit-overflow-scrolling:touch}'
    + '.ggs-qi-head{padding:18px 22px 8px;border-bottom:1px solid rgba(0,0,0,.05)}'
    + '.ggs-qi-title{font-size:1.35rem;font-weight:800;color:#1f4b37;margin:0 0 .3rem}'
    + '.ggs-qi-lead{font-size:.96rem;color:#3a3a3a;margin:0;line-height:1.45}'
    + '.ggs-qi-body{padding:14px 22px 4px;font-size:.94rem;line-height:1.5;color:#2a2a2a}'
    + '.ggs-qi-h3{font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:#5a5a5a;margin:14px 0 6px;font-weight:700}'
    + '.ggs-qi-steps{margin:0;padding:0 0 0 1.2rem;list-style:decimal}'
    + '.ggs-qi-steps li{margin:.35rem 0}'
    + '.ggs-qi-goals{margin:0;padding:0;list-style:none}'
    + '.ggs-qi-goals li{padding:.28rem 0 .28rem 1.4rem;position:relative}'
    + '.ggs-qi-goals li::before{content:"🎯";position:absolute;left:0;font-size:.92em}'
    + '.ggs-qi-foot{display:flex;justify-content:flex-end;gap:.6rem;padding:14px 22px 18px;border-top:1px solid rgba(0,0,0,.05);background:#fafaf6;border-radius:0 0 14px 14px;position:sticky;bottom:0}'
    + '.ggs-qi-btn{font-family:inherit;font-size:.94rem;font-weight:700;padding:.55rem 1.1rem;border-radius:8px;border:0;cursor:pointer;transition:transform .08s,background .15s}'
    + '.ggs-qi-btn-primary{background:#1f4b37;color:#fff}'
    + '.ggs-qi-btn-primary:hover{background:#173527}'
    + '.ggs-qi-btn-primary:active{transform:scale(.97)}'
    + '@keyframes ggs-qi-fade{from{opacity:0}to{opacity:1}}'
    + '@keyframes ggs-qi-pop{from{opacity:0;transform:translateY(12px) scale(.97)}to{opacity:1;transform:none}}'
    + '@media (max-width:520px){.ggs-qi-modal{max-height:96vh}.ggs-qi-title{font-size:1.18rem}.ggs-qi-foot{padding-bottom:max(18px,env(safe-area-inset-bottom))}}';

  var CSS_INJECTED = false;
  function injectCss() {
    if (CSS_INJECTED) return;
    var s = document.createElement('style');
    s.id = 'ggs-quick-intro-css';
    s.textContent = CSS;
    document.head.appendChild(s);
    CSS_INJECTED = true;
  }

  function escapeHtml(s) {
    return String(s == null ? '' : s).replace(/[<>&"]/g, function (c) {
      return { '<': '&lt;', '>': '&gt;', '&': '&amp;', '"': '&quot;' }[c];
    });
  }

  var _config = null;
  var _back = null;
  var _page = 1;

  function lsKey()    { return _config && _config.simId ? 'ggs.intro.' + _config.simId : null; }
  function markSeen() { try { var k = lsKey(); if (k) localStorage.setItem(k, '1'); } catch (_) {} }
  function isSeen()   { try { var k = lsKey(); return k && localStorage.getItem(k) === '1'; } catch (_) { return false; } }

  function close() {
    if (!_back) return;
    _back.remove();
    _back = null;
    document.removeEventListener('keydown', onKey);
  }
  function onKey(e) { if (e.key === 'Escape') close(); }

  function onBackClick(e) {
    if (e.target === _back) { markSeen(); close(); return; }
    var a = e.target && e.target.dataset && e.target.dataset.action;
    if (a === 'next')  { _page = 2; render(); }
    else if (a === 'back')  { _page = 1; render(); }
    else if (a === 'start') { markSeen(); close(); }
  }

  function render() {
    injectCss();
    var p2 = _config.page2 || null;
    var hasP2 = !!(p2 && (p2.html || p2.body));

    var headTitle, headLead, body, foot;
    if (_page === 2 && hasP2) {
      headTitle = p2.title || _config.title || 'Mehr dazu';
      headLead  = '';
      body      = (p2.html || p2.body || '');
      foot = '<button type="button" class="ggs-qi-btn" data-action="back" style="background:#e8e4d8;color:#2a2a2a">← Zurück</button>'
           + '<button type="button" class="ggs-qi-btn ggs-qi-btn-primary" data-action="start">Los geht\'s →</button>';
    } else {
      var steps = (_config.steps || []).map(function (s) {
        return '<li>' + (s.indexOf('<') >= 0 ? s : escapeHtml(s)) + '</li>';
      }).join('');
      var goals = (_config.goals || []).map(function (g) {
        return '<li>' + escapeHtml(g) + '</li>';
      }).join('');
      headTitle = _config.title || 'Anleitung';
      headLead  = _config.lead ? '<p class="ggs-qi-lead">' + escapeHtml(_config.lead) + '</p>' : '';
      body = (steps ? '<div class="ggs-qi-h3">Was tust du?</div><ol class="ggs-qi-steps">' + steps + '</ol>' : '')
           + (goals ? '<div class="ggs-qi-h3">Was lernst du?</div><ul class="ggs-qi-goals">' + goals + '</ul>' : '');
      foot = hasP2
        ? '<button type="button" class="ggs-qi-btn ggs-qi-btn-primary" data-action="next">Weiter →</button>'
        : '<button type="button" class="ggs-qi-btn ggs-qi-btn-primary" data-action="start">Los geht\'s →</button>';
    }

    var html = ''
      + '<div class="ggs-qi-modal" role="dialog" aria-modal="true" aria-labelledby="ggs-qi-title">'
      +   '<div class="ggs-qi-head">'
      +     '<h2 id="ggs-qi-title" class="ggs-qi-title">' + escapeHtml(headTitle) + '</h2>'
      +     headLead
      +   '</div>'
      +   '<div class="ggs-qi-body">' + body + '</div>'
      +   '<div class="ggs-qi-foot">' + foot + '</div>'
      + '</div>';

    if (!_back) {
      _back = document.createElement('div');
      _back.className = 'ggs-qi-back';
      _back.addEventListener('click', onBackClick);
      document.body.appendChild(_back);
      document.addEventListener('keydown', onKey);
    }
    _back.innerHTML = html;
    var m = _back.querySelector('.ggs-qi-modal'); if (m) m.scrollTop = 0;
  }

  function open() {
    if (!_config) return;
    // Sicherheitsnetz: alle evtl. schon vorhandenen Overlays entfernen (nie doppelt)
    var olds = document.querySelectorAll('.ggs-qi-back');
    for (var i = 0; i < olds.length; i++) olds[i].remove();
    _back = null;
    document.removeEventListener('keydown', onKey);
    _page = 1;
    render();
  }

  window.GgsQuickIntro = {
    init: function (config) {
      _config = config || {};
      // Plattform-Convention: GGS_TUTORIAL.replay() wird vom ℹ-Button im Header gerufen.
      window.GGS_TUTORIAL = {
        simId:  _config.simId,
        title:  _config.title,
        replay: function () { open(); },
      };
      // Beim 1. Besuch automatisch öffnen.
      if (!isSeen()) {
        // Kleiner Delay, damit Sim-Boot zuerst sein DOM aufbauen kann.
        setTimeout(open, 400);
      }
    },
    open:  open,
    close: close,
  };
})();