/* author: michael Erkelenz */
/* copy i:punkt */
var TotalPageWeight = 0;
var Visits = 10000;
var kWhPerGB = 1.8;
var kgCo2PerkWh = 0.756;
const observer = new PerformanceObserver((list) => {
    list.getEntries().forEach((entry) => {
        if (entry.transferSize === 0 && entry.decodedBodySize > 0) {
        /*    console.log(entry.name+' was loaded from cache'); */
            TotalPageWeight+=entry.decodedBodySize;
        }
        else{
       /*     console.log(entry.name+' size: '+entry.decodedBodySize +" "); */
            TotalPageWeight+=entry.transferSize;
        }
    });
});
observer.observe({ type: "resource", buffered: true });
function observerResult(){
    console.log("Total Page Weight: "+TotalPageWeight + " Bytes");
    var KB = TotalPageWeight / 1000;
    var MB = KB / 1000;
    var GB = MB / 1000;
    var TotalKwH = kWhPerGB * GB;
    var Co2 = TotalKwH * kgCo2PerkWh;
    var Gramm = Co2 * 1000;
    console.log("Total kWh: "+ TotalKwH + " kWh");
    console.log("Total Co2: "+ Gramm + "g CO2");
    console.log("Total Co2 for "+Visits+" Pageviews: "+ Co2 * Visits + " kg Co2 ");
}
addEventListener("load", (event) => {
    observerResult();
});