<script>
(function(){
  // Run only on the calculator page
  var shouldRun = location.pathname.indexOf('/members-area/calculator') !== -1;
  if(!shouldRun) return;

  function num(v){ var n=parseFloat(String(v).replace(',','.')); return isFinite(n)?n:0; }

  // Poll until the HTML exists (Typedream can hydrate late)
  var tries = 0, maxTries = 80; // ~8s worst case
  var t = setInterval(function(){
    var root = document.getElementById('bodhi-calc-2');
    if(root){
      clearInterval(t);
      init();
    }else if(++tries >= maxTries){
      clearInterval(t);
      console.warn('BodhiPep calc: mount not found.');
    }
  }, 100);

  function init(){
    var vial   = document.getElementById('bp_vial');
    var bac    = document.getElementById('bp_bac');
    var dose   = document.getElementById('bp_dose');
    var units  = document.getElementById('bp_units');

    var resVal = document.getElementById('bp_result');
    var resUni = document.getElementById('bp_resultUnit');
    var gFill  = document.getElementById('bp_gaugeFill');
    var gLab   = document.getElementById('bp_gaugeLabel');

    var modeUnits = document.getElementById('bp_mode_units');
    var modeDose  = document.getElementById('bp_mode_dose');

    // Guard: if any key element is missing, bail
    if(!vial || !bac || !resVal){ console.warn('BodhiPep calc: elements missing.'); return; }

    function ensureDefaults(){
      if(!vial.value) vial.value = localStorage.getItem('bodhi_vial') || '10';
      if(!bac.value)  bac.value  = localStorage.getItem('bodhi_bac')  || '2';
    }

    function currentMode(){ return modeUnits.checked ? 'units' : 'dose'; }

    function setOutput(v, digits, unit){
      resVal.textContent = (isFinite(v)?v:0).toFixed(digits||2);
      if(unit) resUni.textContent = unit;
    }

    function gauge(u){
      var val = Math.max(0, Math.min(100, u||0));
      gFill.style.width = val + '%';
      gLab.textContent = 'Draw volume: ' + (u||0).toFixed(2) + ' u';
    }

    function calc(){
      ensureDefaults();
      var mMg = num(vial.value);
      var vMl = num(bac.value);
      if(!(mMg>0 && vMl>0)){ setOutput(0, 2, currentMode()==='units'?'units':'mg'); gauge(0); return; }
      var mgPerUnit = mMg / (vMl*100);

      if(currentMode()==='units'){
        var dMg = num(dose.value);
        var outU = dMg>0 ? (dMg / mgPerUnit) : 0;
        setOutput(outU, 2, 'units'); gauge(outU);
      }else{
        var uU = num(units.value);
        var outMg = uU>0 ? (uU * mgPerUnit) : 0;
        setOutput(outMg, 3, 'mg'); gauge(uU);
      }
    }

    function switchMode(){
      var mode = currentMode();
      document.getElementById('bp_doseGroup').style.display  = (mode==='units') ? '' : 'none';
      document.getElementById('bp_unitsGroup').style.display = (mode==='dose')  ? '' : 'none';
      resUni.textContent = (mode==='units') ? 'units' : 'mg';
      calc();
    }

    // Wire up events
    [vial,bac,dose,units].forEach(function(el){
      if(!el) return;
      el.addEventListener('input', calc);
      el.addEventListener('change', calc);
    });
    modeUnits.addEventListener('change', switchMode);
    modeDose .addEventListener('change', switchMode);

    // Preset chips (event delegation)
    document.querySelectorAll('#bodhi-calc-2 .chip').forEach(function(btn){
      btn.addEventListener('click', function(){
        var id = btn.getAttribute('data-target');
        var v  = btn.getAttribute('data-val');
        var input = document.getElementById(id);
        if(input){ input.value = v; calc(); }
      });
    });

    // Buttons
    var copyBtn  = document.getElementById('bp_copy');
    var saveBtn  = document.getElementById('bp_save');
    var clearBtn = document.getElementById('bp_clear');

    if(copyBtn) copyBtn.addEventListener('click', function(){
      if(navigator.clipboard){ navigator.clipboard.writeText(resVal.textContent.trim()); }
    });
    if(saveBtn) saveBtn.addEventListener('click', function(){
      localStorage.setItem('bodhi_vial', vial.value||'');
      localStorage.setItem('bodhi_bac',  bac.value||'');
    });
    if(clearBtn) clearBtn.addEventListener('click', function(){
      vial.value=''; bac.value=''; dose.value=''; units.value='';
      setOutput(0,2,currentMode()==='units'?'units':'mg'); gauge(0);
    });

    // First render
    switchMode();
    calc();
    console.log('BodhiPep calc initialized.');
  }
})();
</script>

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