// ==UserScript==
// @name         RS-Online total cost highlighter
// @namespace    http://tampermonkey.net/
// @version      0.1-190423
// @description  RS-Online (CZ) total cost calculator-highlighter
// @author       Shaddack
// @match        https://*.rs-online.com/web/c/*
// @grant        none
// ==/UserScript==

// usage:
// press '/' to highlight prices (0=white, pricemax=colmin dark gray)
// press '?' to also hide rows with big packs, more than maxcount items - rarely we need an entire reel

(function() {
 'use strict';
 document.onkeypress=function(ev){

  var pricemax=1000;  // max price for the range, allabove that is colmin shade
  var colmin=0x44;    // price no darker than this
  var maxcount=1000;  // parts count above which we hide the rows
  var maxcountcol="#555555";

  var c,cc,o,oo,n,a,aa,aaa,t,tt,count,price,pricetot,s,s1,s2,col,colstr,reformatted;
  //    alert('ev='+ev+':'+ev.target.nodeName+':'+ev.target.getAttribute('type'));
  if (ev.target.nodeName.toLowerCase() == 'input')return true;
  if (ev.target.nodeName.toLowerCase() == 'textarea')return true;
  if(window.event)c=window.event.keyCode;else if(ev)c=ev.which;
  cc=c;
  c=String.fromCharCode(c);
  //    alert('KEY:'+c+':'+cc);
        if(c==','){alert('KEY:'+c+':'+cc);return false;} // test
        if((c=='/')||(c=='?')){
            // the meat goes here
            a=document.getElementsByClassName('resultRow');if(!a){alert("no classname found!");return false;}
            for(t=1;t<a.length;t++){ // row 0 is the header row
                count=0;price=0;pricetot=0;reformatted=0;
                //
                // parse count
                aa=a[t].getElementsByClassName('quantity-field');
                if(!aa){a[t].style.backgroundColor='red';continue;}
                if(aa.length<1){a[t].style.backgroundColor='yellow';continue;}
                count=(aa[0].value*1);
                //
                aa=a[t].getElementsByClassName('price');
                if(!aa){a[t].style.backgroundColor='red';continue;}
                if(aa.length<1){a[t].style.backgroundColor='yellow';continue;}
                //
                // parse price
                aaa=aa[0].innerHTML.split(' ');
                //
                // todo: bettter sensing if we already reformatted the field
                // todo: parse also for other currencies, possibly autoadjust maxprice - silently assumes czk now
                if(aaa[1]=='←')reformatted=1;else reformatted=0;
                //
                if(reformatted)s=aaa[2];else s=aaa[0];
                s=s.replace(",",".");
                //s=s.replace(" ","=");
                s=s.replace("&nbsp;",'');
                //alert(s+':'+(s*1));
                price=s*1;
                pricetot=price*count;
                pricetot=pricetot.toFixed(2);
                //a[t].innerHTML=pricetot+' : '+a[t].innerHTML;
                //aa[0].innerHTML=aa[0].innerHTML + " &rarr; "+pricetot;
                if(!reformatted)
                  aa[0].innerHTML=pricetot + " &larr; <br/><small>"+aa[0].innerHTML+"</small>";
                //
                if(pricetot>pricemax)col=colmin;else{
                    col=((pricemax-pricetot)/pricemax)*(255-colmin)+colmin;
                    if(col>255)col=255;else if(col<0)col=0;else col=Math.round(col);
                }
                //
                if(count>=maxcount){
                  a[t].style.backgroundColor=maxcountcol;
                  a[t].style.size="80%";
                  //a[t].style.height="20px";
                  //a[t].style.overflow="hidden";
                  if(c=='?'){ // hide big boxes of stuff
                    a[t].style.visible="hidden";
                    a[t].style.display="none";
                  }
                  //
                }
                //
                colstr='rgb('+col+','+col+','+col+')';
                aa=a[t].getElementsByClassName('priceCol');
                aa[0].style.backgroundColor=colstr;
                //a[t].style.backgroundColor=colstr;
                //if(pricetot>1000){a[t].style.backgroundColor=colstr;continue;}
            }
        }
    }
})();