// Minimal CoBiE analog clock logic
const COBIE_EPOCH = 0;
const COBIE_UNITS = {
  second: 1,
  xenocycle: 0x10,
  quantic: 0x100,
  chronon: 0x1000,
  eonstrip: 0x10000
};
function floorDiv(a,b){ return Math.trunc(a/b); }
function getTAIOffsetAt(date){
  const taiEpoch = new Date('1958-01-01T00:00:00Z');
  if(date < taiEpoch) return 0;
  const leapSeconds=[
    {date:'1972-01-01T00:00:00Z',offset:10},
    {date:'1972-07-01T00:00:00Z',offset:11},
    {date:'1973-01-01T00:00:00Z',offset:12},
    {date:'1974-01-01T00:00:00Z',offset:13},
    {date:'1975-01-01T00:00:00Z',offset:14},
    {date:'1976-01-01T00:00:00Z',offset:15},
    {date:'1977-01-01T00:00:00Z',offset:16},
    {date:'1978-01-01T00:00:00Z',offset:17},
    {date:'1979-01-01T00:00:00Z',offset:18},
    {date:'1980-01-01T00:00:00Z',offset:19},
    {date:'1981-07-01T00:00:00Z',offset:20},
    {date:'1982-07-01T00:00:00Z',offset:21},
    {date:'1983-07-01T00:00:00Z',offset:22},
    {date:'1985-07-01T00:00:00Z',offset:23},
    {date:'1988-01-01T00:00:00Z',offset:24},
    {date:'1990-01-01T00:00:00Z',offset:25},
    {date:'1991-01-01T00:00:00Z',offset:26},
    {date:'1992-07-01T00:00:00Z',offset:27},
    {date:'1993-07-01T00:00:00Z',offset:28},
    {date:'1994-07-01T00:00:00Z',offset:29},
    {date:'1996-01-01T00:00:00Z',offset:30},
    {date:'1997-07-01T00:00:00Z',offset:31},
    {date:'1999-01-01T00:00:00Z',offset:32},
    {date:'2006-01-01T00:00:00Z',offset:33},
    {date:'2009-01-01T00:00:00Z',offset:34},
    {date:'2012-07-01T00:00:00Z',offset:35},
    {date:'2015-07-01T00:00:00Z',offset:36},
    {date:'2017-01-01T00:00:00Z',offset:37}
  ];
  for(let i=0;i<leapSeconds.length;i++){
    const d=new Date(leapSeconds[i].date);
    if(date<d) return i===0?10:leapSeconds[i-1].offset;
  }
  return 37;
}
function toCobiets(date){
  const utcSec=floorDiv(date.getTime(),1000);
  const taiSec=utcSec+getTAIOffsetAt(date);
  return taiSec-COBIE_EPOCH;
}
function placeMarkers(){
  const clock=document.getElementById('clock');
  const radius=clock.offsetWidth/2-20;
  for(let i=0;i<16;i++){
    const angle=i/16*2*Math.PI;
    const x=radius*Math.sin(angle);
    const y=-radius*Math.cos(angle);
    const m=document.createElement('div');
    m.className='marker';
    m.textContent=i.toString(16).toUpperCase();
    m.style.left=`${clock.offsetWidth/2+x}px`;
    m.style.top=`${clock.offsetHeight/2+y}px`;
    clock.appendChild(m);
  }
}
function updateClock(){
  const now=new Date();
  const cob=toCobiets(now);
  const xf=(cob%COBIE_UNITS.quantic)/COBIE_UNITS.quantic;
  const qf=(cob%COBIE_UNITS.chronon)/COBIE_UNITS.chronon;
  const cf=(cob%COBIE_UNITS.eonstrip)/COBIE_UNITS.eonstrip;
  document.getElementById('handXeno').style.transform=`rotate(${xf*360}deg)`;
  document.getElementById('handQuantic').style.transform=`rotate(${qf*360}deg)`;
  document.getElementById('handChronon').style.transform=`rotate(${cf*360}deg)`;
}
window.addEventListener('load',()=>{
  placeMarkers();
  updateClock();
  setInterval(updateClock,1000);
  const clk=document.getElementById('clock');
  if(clk){
    clk.addEventListener('click',()=>{
      document.body.classList.toggle('fullscreen-clock');
    });
  }
});