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const puppeteer = require('puppeteer');

const html = `<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Cinematic Motion Graphics 30s</title>
<style>
html,body{margin:0;width:100%;height:100%;overflow:hidden;background:#050814}
canvas{position:fixed;inset:0}
#ui{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;pointer-events:none}
.title{
position:absolute;
font-family:Georgia,serif;
font-weight:700;
font-size:clamp(60px,9vw,180px);
letter-spacing:.08em;
color:white;
opacity:0;
transform:translateY(40px) scale(.9);
text-transform:uppercase;
text-shadow:0 0 30px rgba(255,255,255,.25);
}
.sub{
position:absolute;
top:62%;
font-family:Arial,sans-serif;
letter-spacing:.6em;
font-size:14px;
color:rgba(255,255,255,.8);
opacity:0;
text-transform:uppercase;
}
</style>
</head>
<body>
<canvas id="c"></canvas>
<div id="ui">
<div class="title" id="title">MOTION</div>
<div class="sub" id="sub">DESIGN • RHYTHM • STORY</div>
</div>

<script>
const canvas=document.getElementById('c');
const ctx=canvas.getContext('2d',{alpha:false,willReadFrequently:true});
canvas.width=1920; canvas.height=1080;

const title=document.getElementById('title');
const sub=document.getElementById('sub');
const D=30000;

function lerp(a,b,t){return a+(b-a)*t;}
function clamp(x,a,b){return Math.max(a,Math.min(b,x));}

function drawBackground(t){
  ctx.fillStyle='#050814';
  ctx.fillRect(0,0,1920,1080);

  for(let i=0;i<80;i++){
    let y=i*14 + Math.sin(t*0.001+i*0.4)*25;
    ctx.strokeStyle='rgba(80,160,255,.08)';
    ctx.beginPath();
    ctx.moveTo(0,y*4);
    ctx.lineTo(1920,y*4);
    ctx.stroke();
  }
}

function sceneLines(local){
  for(let i=0;i<30;i++){
    let p=clamp(local-i*0.03,0,1);
    let len=1200*p;
    let y=120+i*28;
    ctx.strokeStyle='rgba(180,220,255,'+(0.08+p*0.35)+')';
    ctx.lineWidth=2;
    ctx.beginPath();
    ctx.moveTo(960-len/2,y);
    ctx.lineTo(960+len/2,y);
    ctx.stroke();
  }
}

function sceneNetwork(local){
  const pts=[];
  for(let i=0;i<24;i++){
    let a=i/24*Math.PI*2+local*2;
    let r=260+Math.sin(a*3+local*4)*70;
    pts.push([960+Math.cos(a)*r,540+Math.sin(a)*r]);
  }
  ctx.strokeStyle='rgba(255,255,255,.15)';
  for(let i=0;i<pts.length;i++){
    let a=pts[i], b=pts[(i+1)%pts.length];
    ctx.beginPath(); ctx.moveTo(a[0],a[1]); ctx.lineTo(b[0],b[1]); ctx.stroke();
  }
}

function sceneRibbons(local){
  for(let i=0;i<120;i++){
    let p=(i/120+local*0.2)%1;
    let x=1920*(1-p);
    let y=540+Math.sin(p*10+local*8+i)*220;
    ctx.strokeStyle='rgba(220,120,255,.12)';
    ctx.beginPath();
    ctx.moveTo(x,y);
    ctx.lineTo(x+180,y+Math.cos(i)*30);
    ctx.stroke();
  }
}

function sceneFinal(local){
  ctx.save();
  ctx.translate(960,540);
  ctx.rotate(local*0.5);
  for(let i=0;i<8;i++){
    ctx.strokeStyle='rgba(255,220,120,.15)';
    ctx.strokeRect(-260-i*18,-260-i*18,520+i*36,520+i*36);
  }
  ctx.restore();
}

function animate(ms){
  const t=ms%D;
  drawBackground(ms);

  title.style.opacity=0;
  sub.style.opacity=0;

  if(t<7000){
    sceneLines(t/7000);
    if(t>1500){
      let p=(t-1500)/2000;
      title.style.opacity=clamp(p,0,1);
      title.style.transform=\`translateY(\${40-40*clamp(p,0,1)}px) scale(\${0.9+0.1*clamp(p,0,1)})\`;
    }
  }
  else if(t<14000){
    sceneNetwork((t-7000)/1000);
    title.innerText="KINETIC";
    title.style.opacity=1;
    sub.style.opacity=.8;
  }
  else if(t<22000){
    sceneRibbons((t-14000)/1000);
    title.innerText="STORY";
    title.style.opacity=1;
    sub.style.opacity=.8;
  }
  else{
    sceneFinal((t-22000)/8000);
    title.innerText="CREATE";
    title.style.opacity=1;
    sub.style.opacity=.8;
  }

  requestAnimationFrame(animate);
}
requestAnimationFrame(animate);
</script>
</body>
</html>`;

(async () => {
  const browser = await puppeteer.launch({ headless: 'new', args: ['--no-sandbox', '--disable-gpu'] });
  const page = await browser.newPage();
  await page.setViewport({ width: 1920, height: 1080 });
  await page.setContent(html);
  
  // Wait for 1 second of animation
  await new Promise(r => setTimeout(r, 1000));
  
  // Simulate the injection
  await page.evaluate(() => {
    const c = document.querySelector('canvas');
    const dataUrl = c.toDataURL('image/png');
    let img = document.getElementById('test-img');
    if(!img) {
      img = document.createElement('img');
      img.id = 'test-img';
      img.style.position = 'fixed';
      img.style.pointerEvents = 'none';
      const computedStyle = window.getComputedStyle(c);
      img.style.zIndex = computedStyle.zIndex || '0';
      c.parentNode.insertBefore(img, c.nextSibling);
    }
    img.src = dataUrl;
    const rect = c.getBoundingClientRect();
    img.style.left = rect.left + 'px';
    img.style.top = rect.top + 'px';
    img.style.width = rect.width + 'px';
    img.style.height = rect.height + 'px';
    c.style.visibility = 'hidden';
  });

  await page.screenshot({ path: 'test_html2.jpg' });
  await browser.close();
})();