(function(){
  if(window._toolbar) return;
  window._toolbar=true;

  var css=document.createElement('style');
  css.textContent=`
    #mb{display:none;position:fixed;bottom:0;left:0;right:0;background:#111;
      border-top:2px solid #D35400;padding:4px 3px;gap:3px;justify-content:center;
      flex-wrap:wrap;z-index:99999}
    #mb button{background:#222;color:#ccc;border:1px solid #444;border-radius:5px;
      padding:9px 10px;font-size:13px;font-family:ui-monospace,monospace;
      cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;
      min-width:38px;text-align:center;user-select:none}
    #mb button:active{background:#D35400;color:#0a0a0a;border-color:#D35400}
    #mb button.hi{border-color:#D35400;color:#D35400}
    #mb button.on{background:#D35400;color:#0a0a0a;border-color:#D35400}
    #mb button.grn{border-color:#4e9a06;color:#4e9a06}
    #mb button.grn.on{background:#4e9a06;color:#0a0a0a}
    #mb .sep{width:1px;background:#333;margin:0 1px;align-self:stretch}
    #mb .row{display:flex;gap:3px;justify-content:center;width:100%}
    @media(max-width:900px){#mb{display:flex}}
    body.selmode .xterm-screen{pointer-events:none!important;
      user-select:text!important;-webkit-user-select:text!important}
  `;
  document.head.appendChild(css);

  var bar=document.createElement('div');
  bar.id='mb';
  bar.innerHTML=
    '<div class="row">'+
    '<button class="hi" data-k="\x01c">+Tab</button>'+
    '<button data-k="\x01n">Next</button>'+
    '<button data-k="\x01p">Prev</button>'+
    '<div class="sep"></div>'+
    '<button data-k="\x03">^C</button>'+
    '<button data-k="\x04">^D</button>'+
    '<button data-k="\x0c">Clr</button>'+
    '<div class="sep"></div>'+
    '<button data-k="\x1b">Esc</button>'+
    '<button data-k="\t">Tab</button>'+
    '<button data-k="\x1bOA">\u25B2</button>'+
    '<button data-k="\x1bOB">\u25BC</button>'+
    '</div>'+
    '<div class="row">'+
    '<button class="hi" id="selbtn" data-sel="1">Sel</button>'+
    '<button class="hi" id="pastebtn" data-paste="1">Paste</button>'+
    '<button data-k="\x01z">Zoom</button>'+
    '<button class="grn" data-save="1">Save</button>'+
    '<div class="sep"></div>'+
    '<button data-k="\x01v">V.Spl</button>'+
    '<button data-k="\x01s">H.Spl</button>'+
    '<button data-k="\x01o">Pane</button>'+
    '<button data-k="\x01x">Kill</button>'+
    '</div>';
  document.body.appendChild(bar);

  // Send data to terminal via xterm's _core (bypasses any .input() issues)
  function send(k){
    if(document.body.classList.contains('selmode')) toggleSel();
    var t=window.term;
    if(!t) return;
    // Try _core.triggerDataEvent first (fires onData which ttyd hooks)
    if(t._core && t._core.coreService && t._core.coreService.triggerDataEvent){
      t._core.coreService.triggerDataEvent(k);
    } else if(t._core && t._core._onData){
      t._core._onData.fire(k);
    } else if(t.input){
      t.input(k);
    }
    t.focus();
  }

  function toggleSel(){
    var b=document.getElementById('selbtn');
    document.body.classList.toggle('selmode');
    if(document.body.classList.contains('selmode')){
      b.classList.add('on');b.textContent='Done';
    } else {
      b.classList.remove('on');b.textContent='Sel';
      window.getSelection().removeAllRanges();
      if(window.term) window.term.focus();
    }
  }

  function doPaste(){
    if(!navigator.clipboard||!navigator.clipboard.readText){
      alert('Clipboard access not available (needs HTTPS)');
      return;
    }
    navigator.clipboard.readText().then(function(text){
      if(text) send(text);
    }).catch(function(e){
      alert('Clipboard read failed: '+e.message);
    });
  }

  function doSave(){
    send('\x01S');
    var btn=document.querySelector('[data-save]');
    btn.classList.add('on');
    btn.textContent='\u2713';
    setTimeout(function(){btn.classList.remove('on');btn.textContent='Save';},1500);
  }

  bar.addEventListener('click',function(e){
    var btn=e.target.closest('button');
    if(!btn) return;
    if(btn.dataset.sel) return toggleSel();
    if(btn.dataset.paste) return doPaste();
    if(btn.dataset.save) return doSave();
    if(btn.dataset.k) send(btn.dataset.k);
  });

  // Ensure terminal keeps focus (prevents Tab from escaping to browser chrome)
  document.addEventListener('click', function(e){
    if(!e.target.closest('#mb') && window.term) window.term.focus();
  });

  // Remove tabindex from toolbar buttons so Tab can't escape to them
  bar.querySelectorAll('button').forEach(function(b){ b.tabIndex = -1; });

  // Shrink terminal for toolbar on mobile (2 rows)
  var obs=new MutationObserver(function(){
    var el=document.querySelector('.xterm');
    if(el && window.innerWidth<=900){
      el.style.height='calc(100vh - 88px)';
      if(window.term && window.term.fit) window.term.fit();
    }
  });
  obs.observe(document.body,{childList:true,subtree:true});
})();