/* Catalog prices are derived, never overwritten by a timer. Stored order lines
   keep their own price snapshots. Promotion dates are absolute UTC instants. */
(()=>{
 'use strict';
 const DAY=86400000,MAX_TIMER=2147480000;
 const number=v=>typeof v==='number'?v:Number(String(v??'').trim().replace(',','.'));
 const cents=v=>Math.round((v+Number.EPSILON)*100)/100;
 const validPrice=v=>Number.isFinite(number(v))&&number(v)>=0;
 const money=v=>`${Number(v).toLocaleString('ru-RU',{maximumFractionDigits:2})} ₽`;
 const stamp=v=>typeof v==='string'&&v.trim()?Date.parse(v):NaN;
 const $=id=>document.getElementById(id);
 function basePrice(item){
  const current=validPrice(item?.price)?cents(number(item.price)):0;
  // Compatibility only: old records stored the discounted price in price.
  return !item?.promotion&&validPrice(item?.oldPrice)&&number(item.oldPrice)>current?cents(number(item.oldPrice)):current;
 }
 function promotion(item){
  if(item?.promotion&&typeof item.promotion==='object')return item.promotion;
  const base=basePrice(item),current=validPrice(item?.price)?cents(number(item.price)):0;
  return base>current?{type:'amount',value:cents(base-current),startsAt:null,endsAt:null}:null;
 }
 function quote(item,now=Date.now()){
  const base=basePrice(item),p=promotion(item),value=number(p?.value);
  const start=p?.startsAt==null?-Infinity:stamp(p.startsAt),end=p?.endsAt==null?Infinity:stamp(p.endsAt);
  const valid=Boolean(p&&['percent','amount'].includes(p.type)&&Number.isFinite(value)&&value>0&&base>0&&value<=(p.type==='percent'?100:base)&&!Number.isNaN(start)&&!Number.isNaN(end)&&end>start);
  const active=valid&&now>=start&&now<end;
  return {base,price:active?cents(Math.max(0,base-(p.type==='percent'?base*value/100:value))):base,active,scheduled:valid&&now<start,expired:valid&&now>=end};
 }
 const price=(item,now)=>quote(item,now).price;
 function linePrice(line,item,now){return line?.price!==undefined&&line.price!==null&&String(line.price).trim()!==''&&validPrice(line.price)?cents(number(line.price)):price(item,now)}
 const badge=(item)=>quote(item).active?'<span class="ct-promotion-badge">Акция</span>':'';
 const localTime=iso=>{const d=new Date(iso);if(!Number.isFinite(d.getTime()))return '';return `${d.getFullYear()}-${String(d.getMonth()+1).padStart(2,'0')}-${String(d.getDate()).padStart(2,'0')}T${String(d.getHours()).padStart(2,'0')}:${String(d.getMinutes()).padStart(2,'0')}`};
 let editorOriginal=null,getter=null,timer=0,lastSignature='';
 function loadEditor(item){
  const p=promotion(item),q=quote(item);
  editorOriginal=p?{...p}:null;
  if(!$('ctPromotionEnabled'))return;
  $('boxPrice').value=basePrice(item);
  $('ctPromotionEnabled').checked=Boolean(p&&!q.expired);
  $('ctDiscountType').value=p?.type==='amount'?'amount':'percent';
  $('ctDiscountValue').value=p?.value??'';
  const keep=$('ctPromotionDuration').querySelector('[value="keep"]');
  keep.hidden=!(p?.endsAt&&!q.expired);
  $('ctPromotionDuration').value=p&&!q.expired?(p.endsAt?'keep':'none'):'7';
  $('ctPromotionEnd').value=p?.endsAt?localTime(p.endsAt):'';
  $('ctPromotionError').textContent='';
  updateEditor();
 }
 function readEditor(now=Date.now()){
  const base=number($('boxPrice')?.value);
  if(!Number.isFinite(base)||base<0)return {error:'Укажите обычную цену: число не меньше нуля.',field:'boxPrice'};
  if(!$('ctPromotionEnabled')?.checked)return {base:cents(base),promotion:null};
  const type=$('ctDiscountType').value,raw=$('ctDiscountValue').value,value=number(raw);
  if(!raw.trim()||!Number.isFinite(value)||cents(value)<=0)return {error:'Укажите скидку больше нуля.',field:'ctDiscountValue'};
  if(base<=0||value>(type==='percent'?100:base))return {error:type==='percent'?'Скидка должна быть не больше 100%, а обычная цена — больше нуля.':'Скидка не может превышать обычную цену.',field:'ctDiscountValue'};
  const duration=$('ctPromotionDuration').value;
  let startsAt=editorOriginal?.startsAt||new Date(now).toISOString(),endsAt=null;
  if(duration==='keep')endsAt=editorOriginal?.endsAt;
  else if(duration==='custom'){
   const rawEnd=$('ctPromotionEnd').value,t=new Date(rawEnd).getTime();
   if(!rawEnd||!Number.isFinite(t))return {error:'Выберите дату и время окончания акции.',field:'ctPromotionEnd'};
   endsAt=new Date(t).toISOString();startsAt=new Date(now).toISOString();
  }else if(duration!=='none'){
   if(!['1','7','14','30'].includes(duration))return {error:'Выберите срок акции.',field:'ctPromotionDuration'};
   startsAt=new Date(now).toISOString();endsAt=new Date(now+Number(duration)*DAY).toISOString();
  }
  if(endsAt&&stamp(endsAt)<=now)return {error:'Акция уже закончилась. Выберите новый срок или выключите её.',field:'ctPromotionDuration'};
  return {base:cents(base),promotion:{type,value:cents(value),startsAt,endsAt}};
 }
 function updateEditor(){
  const enabled=$('ctPromotionEnabled')?.checked,fields=$('ctPromotionFields');if(!fields)return;
  fields.hidden=!enabled;
  $('ctPromotionEndLabel').hidden=$('ctPromotionDuration').value!=='custom';
  const type=$('ctDiscountType').value;
  $('ctDiscountCaption').textContent=type==='percent'?'Скидка, %':'Скидка, ₽';
  $('ctDiscountValue').max=type==='percent'?'100':String(number($('boxPrice').value)||0);
  const data=readEditor(),preview=$('ctPromotionPreview');
  if(data.error){preview.textContent=enabled?data.error:'';return;}
  const q=quote({price:data.base,promotion:data.promotion});
  const ending=data.promotion?.endsAt?` До ${new Date(data.promotion.endsAt).toLocaleString('ru-RU',{day:'numeric',month:'long',hour:'2-digit',minute:'2-digit'})}. Затем снова ${money(data.base)}.`:' Без ограничения срока.';
  preview.textContent=enabled?`Цена по акции: ${money(q.price)}.${ending}`:`Обычная цена: ${money(data.base)}.`;
 }
 function saveEditor(item){
  const data=readEditor();
  if(data.error){$('ctPromotionError').textContent=data.error;$(data.field)?.focus();return false;}
  item.price=data.base;
  if(data.promotion)item.promotion=data.promotion;else delete item.promotion;
  delete item.oldPrice;delete item.sale;
  $('ctPromotionError').textContent='';return true;
 }
 function refresh(){
  clearTimeout(timer);timer=0;if(!getter)return;
  const now=Date.now(),items=getter()||[];
  const signature=JSON.stringify(items.map(i=>[String(i.id),price(i,now),quote(i,now).active]));
  if(signature!==lastSignature){lastSignature=signature;window.dispatchEvent(new CustomEvent('caterium:catalog-prices-changed'));}
  let next=Infinity;
  for(const item of items){const p=promotion(item);for(const t of [stamp(p?.startsAt),stamp(p?.endsAt)])if(t>now)next=Math.min(next,t);}
  if(Number.isFinite(next))timer=setTimeout(refresh,Math.min(MAX_TIMER,Math.max(1,next-Date.now()+10)));
 }
 function watch(catalogGetter){getter=catalogGetter;refresh();}
 function boot(){
  $('ctPromotionEditor')?.addEventListener('input',()=>{if($('ctPromotionError'))$('ctPromotionError').textContent='';updateEditor();});
  $('ctPromotionEditor')?.addEventListener('change',updateEditor);
  $('boxPrice')?.addEventListener('input',updateEditor);
  window.addEventListener('sun:cloud-state-applied',refresh);
  window.addEventListener('focus',refresh);
  document.addEventListener('visibilitychange',()=>{if(!document.hidden)refresh();});
  window.addEventListener('sun:cloud-tenant-changing',()=>{clearTimeout(timer);timer=0;lastSignature='';editorOriginal=null;});
 }
 window.CateriumPricing=Object.freeze({basePrice,promotion,quote,price,linePrice,badge,loadEditor,saveEditor,refresh,watch});
 if(document.readyState==='loading')document.addEventListener('DOMContentLoaded',boot,{once:true});else boot();
})();