(function(){
  /* ---------- mobile nav ---------- */
  var btn=document.getElementById('nav-toggle'), nav=document.getElementById('nav-mobile');
  if(btn&&nav){btn.addEventListener('click',function(){var open=!nav.classList.toggle('hidden');btn.setAttribute('aria-expanded',open?'true':'false');});}

  /* ---------- editor's line date ---------- */
  var eld=document.getElementById('editor-line-date');
  if(eld){try{eld.textContent=new Date().toLocaleDateString('en-US',{month:'short',day:'numeric'});}catch(e){}}

  /* ---------- dynamic rendering ---------- */
  var API='/wp-json/wp/v2';
  if(location.hostname!=='robotbelt.com'&&location.hostname!=='www.robotbelt.com'){API='https://robotbelt.com/wp-json/wp/v2';}
  var EMBED='&_embed=wp:featuredmedia,wp:term';

  var CAT2ACCENT={
    'humanoid-robots':'robotics','robotics':'robotics','shenzhen-robotics':'robotics','industrial-automation':'robotics','shenzhen':'robotics','factory-tours':'robotics',
    'artificial-intelligence':'ai','china-tech':'ai','pro-vision':'ai',
    'ev-mobility':'ev','ev':'ev','electric-vehicles':'ev',
    'semiconductors':'semis','component-index':'semis','supply-chain':'semis',
    'market-trends':'capital','business':'capital',
    'insights':'insights','opinion':'insights','policy-watch':'insights','notebook':'insights'
  };

  function fmtDate(iso){try{return new Date(iso).toLocaleDateString('en-US',{month:'short',day:'numeric',year:'numeric'});}catch(e){return '';}}
  function decode(html){var d=document.createElement('textarea');d.innerHTML=html||'';return d.value;}
  function stripHTML(html){var d=document.createElement('div');d.innerHTML=html||'';var t=d.textContent||'';return t.replace(/\[\u2026\]|\u2026\s*$/g,'').trim();}
  function primaryCat(post){
    var groups=(post._embedded&&post._embedded['wp:term'])||[];
    var skip={'news':1,'notebook':1,'sectors':1,'the-belt':1};
    var fallback=null;
    for(var g=0;g<groups.length;g++){for(var i=0;i<groups[g].length;i++){
      var t=groups[g][i];
      if(t.taxonomy==='category'){ if(!skip[t.slug]) return t; if(!fallback) fallback=t; }
    }}
    return fallback;
  }
  function featured(post){
    var m=post._embedded&&post._embedded['wp:featuredmedia'];
    if(m&&m[0]&&m[0].source_url){
      var sz=m[0].media_details&&m[0].media_details.sizes;
      if(sz){var pick=sz.large||sz.medium_large;if(pick&&pick.source_url)return pick.source_url;}
      return m[0].source_url;
    }
    return null;
  }

  function renderInto(containerId,posts){
    var box=document.getElementById(containerId);if(!box||!posts||!posts.length)return;
    var tpl=box.querySelector('.demo-card');if(!tpl)return;
    var demoCards=Array.prototype.slice.call(box.querySelectorAll('.demo-card'));
    var frag=document.createDocumentFragment();
    posts.forEach(function(p){
      var c=tpl.cloneNode(true);
      c.classList.remove('demo-card');
      var titleA=c.querySelector('.card-title a')||c.querySelector('.card-title');
      if(titleA){titleA.textContent=decode(p.title&&p.title.rendered);if(titleA.tagName==='A'){titleA.href=p.link;}}
      Array.prototype.forEach.call(c.querySelectorAll('a[href="#"]'),function(a){a.href=p.link;});
      var d=c.querySelector('.card-date');if(d){d.textContent=fmtDate(p.date);}
      var catEl=c.querySelector('.card-cat');
      if(catEl){var cat=primaryCat(p);if(cat){catEl.textContent=decode(cat.name);catEl.setAttribute('data-cat',CAT2ACCENT[cat.slug]||'robotics');}}
      var ex=c.querySelector('.card-excerpt');if(ex){ex.textContent=stripHTML(p.excerpt&&p.excerpt.rendered);}
      var img=c.querySelector('.card-img');
      if(img){
        var wrap=img.closest('a');
        var url=featured(p);
        if(url){
          img.src=url;img.alt=decode(p.title&&p.title.rendered);img.style.display='';
          if(wrap){var ph=wrap.querySelector('div');if(ph)ph.remove();}
        } else if(wrap){wrap.remove();}
      }
      frag.appendChild(c);
    });
    demoCards.forEach(function(dc){dc.remove();});
    box.appendChild(frag);
  }

  function getJSON(url){return fetch(url).then(function(r){if(!r.ok)throw new Error('HTTP '+r.status);return r.json();});}

  /* hero (sticky) → headlines (4) + latest (8), no duplication */
  getJSON(API+'/posts?sticky=true&per_page=1'+EMBED).then(function(st){
    var hero=st&&st[0];
    if(hero){renderInto('home-hero',[hero]);}
    var ex=hero?('&exclude='+hero.id):'';
    return getJSON(API+'/posts?per_page=12'+ex+EMBED).then(function(list){
      renderInto('home-headlines',list.slice(0,4));
      renderInto('home-latest',list.slice(4,12));
    });
  }).catch(function(e){});

  /* four desks */
  [['home-humanoid',14],['home-shenzhen',246],['home-ev',16],['home-insights',7]].forEach(function(pair){
    getJSON(API+'/posts?categories='+pair[1]+'&per_page=3'+EMBED)
      .then(function(list){renderInto(pair[0],list);}).catch(function(e){});
  });
})();