/* ============ CALCULATOR (docs/05 formula) ============ */
function fmt(n){return "$"+Math.round(n).toLocaleString("en-US");}

const CURS=[
  {val:"JOD:1.41",key:"calc.opt.jod"},
  {val:"EGP:0.021",key:"calc.opt.egp"},
  {val:"SYP:0.00007",key:"calc.opt.syp"},
  {val:"IQD:0.00076",key:"calc.opt.iqd"},
  {val:"USD:1",key:"calc.opt.usd"},
  {val:"EUR:1.08",key:"calc.opt.eur"},
  {val:"MAD:0.10",key:"calc.opt.mad"},
  {val:"XOF:0.0017",key:"calc.opt.xof"}
];
const PLANS=[
  {val:"349:0.025:0.04:launch",key:"calc.opt.launch"},
  {val:"599:0.02:0.03:growth",key:"calc.opt.growth"},
  {val:"879:0.01:0.02:sov",key:"calc.opt.sov"}
];

function buildCalcDropdowns(){
  const d=I18N[LANG];
  const curSel=$("#cur"),planSel=$("#plan");
  const curVal=curSel.value,planVal=planSel.value;
  curSel.innerHTML="";planSel.innerHTML="";
  CURS.forEach(c=>{const o=document.createElement("option");o.value=c.val;o.textContent=d[c.key]||c.val;curSel.appendChild(o);});
  PLANS.forEach(p=>{const o=document.createElement("option");o.value=p.val;o.textContent=d[p.key]||p.val;planSel.appendChild(o);});
  curSel.value=curVal;planSel.value=planVal;
}

function tripzMonthly(base, pKey, gmv, monthlyTrips, minRate){
  let gmvFee;
  if(pKey === "launch"){
    if(gmv <= 50000) gmvFee = gmv * 0.025;
    else if(gmv <= 200000) gmvFee = 50000 * 0.025 + (gmv - 50000) * 0.02;
    else gmvFee = 50000 * 0.025 + 150000 * 0.02 + (gmv - 200000) * 0.015;
  } else if(pKey === "growth"){
    if(gmv <= 50000) gmvFee = gmv * 0.02;
    else if(gmv <= 200000) gmvFee = 50000 * 0.02 + (gmv - 50000) * 0.015;
    else gmvFee = 50000 * 0.02 + 150000 * 0.015 + (gmv - 200000) * 0.01;
  } else {
    gmvFee = gmv * 0.01;
  }
  const minMonthly = monthlyTrips * minRate;
  return base + Math.max(minMonthly, gmvFee);
}

function crossoverTripsPerDay(base, pKey, minRate, usd){
  for(let t = 1; t <= 10000; t++){
    const mTrips = t * 30;
    const gmv = mTrips * usd;
    const tMonthly = tripzMonthly(base, pKey, gmv, mTrips, minRate);
    const cMonthly = Math.max(gmv * 0.15, mTrips * 0.10);
    if(cMonthly >= tMonthly){
      return t;
    }
  }
  return null;
}

function calc(){
  const trips=+$("#trips").value;
  const fare=+$("#fare").value||0;
  const [curCode, rate]=$("#cur").value.split(":");
  const [baseVal, gmvVal, minVal, pKey]=$("#plan").value.split(":");
  const base = +baseVal, minRate = +minVal;
  const usd = fare * (+rate);
  const monthlyTrips = trips * 30;
  const gmv = monthlyTrips * usd;

  const tripz = tripzMonthly(base, pKey, gmv, monthlyTrips, minRate);
  const commission = gmv * 0.15;
  const floor = monthlyTrips * 0.10;

  $("#rTripz").textContent = fmt(tripz);
  $("#rComm").textContent = fmt(commission);
  $("#rFloor").textContent = fmt(floor);

  const rivalMax = Math.max(commission, floor);
  const save = rivalMax - tripz;
  const bigEl = $("#saveBig");
  const noteEl = $("#saveNote");
  const crossover = crossoverTripsPerDay(base, pKey, minRate, usd);

  if(save > 0){
    bigEl.textContent = fmt(save * 12) + "/yr";
    if(noteEl){
      noteEl.style.display = "block";
      const crossTxt = (I18N[LANG] && I18N[LANG]["calc.r.crossover"]) 
        ? I18N[LANG]["calc.r.crossover"].replace("{n}", crossover || 101)
        : (LANG === "ar" ? `نقطة التعادل والتوفير تبدأ من ${crossover || 101} رحلة/يومياً` : `Break-even and real savings start at ${crossover || 101} trips/day`);
      noteEl.textContent = crossTxt;
    }
  } else {
    bigEl.textContent = "$0/yr";
    if(noteEl){
      noteEl.style.display = "block";
      const crossTxt = (I18N[LANG] && I18N[LANG]["calc.r.crossover"]) 
        ? I18N[LANG]["calc.r.crossover"].replace("{n}", crossover || 101)
        : (LANG === "ar" ? `تبدأ بالربح والتوفير مع Tripz عند وصولك لـ ${crossover || 101} رحلة/يومياً` : `You start saving with Tripz once you reach ${crossover || 101} trips/day`);
      noteEl.textContent = crossTxt;
    }
  }

  const sv = $("#savings"); sv.classList.remove("bump"); void sv.offsetWidth; sv.classList.add("bump");

  const tripsEl = $("#trips");
  const minTrips = +tripsEl.min || 50;
  const maxTrips = +tripsEl.max || 5000;
  const pct = ((trips - minTrips) / (maxTrips - minTrips)) * 100;
  tripsEl.style.setProperty("--p", pct + "%");
  $("#tripsVal").textContent = trips.toLocaleString("en-US") + " / day";

  const msg = encodeURIComponent(`Tripz — ${I18N[LANG]["calc.r.savecap"]}: ${bigEl.textContent} | ${trips}/day @ ${fare} ${curCode}`);
  $("#waCalc").href = "https://wa.me/201023248456?text=" + msg;
}

/* ============ CALC INPUTS ============ */
["trips","fare","cur","plan"].forEach(id=>$("#"+id).addEventListener("input",calc));