<!doctype html>
<html lang="ja">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,viewport-fit=cover" />
<title>抽選ルーレット</title>

<style>
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0;width:100%}
body{
  background:#0b0f18;color:#fff;
  font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic","Noto Sans JP",sans-serif;
  overscroll-behavior:none;
}
.app{width:100%;max-width:420px;margin:0 auto;padding:14px 12px 20px}
.header{display:flex;justify-content:space-between;align-items:center}
.header h1{font-size:16px;font-weight:900;margin:0}
.badge{font-size:11px;padding:4px 8px;border-radius:999px;border:1px solid rgba(255,255,255,.25)}

.notice{
  margin:10px 0;padding:10px 12px;border-radius:14px;
  font-size:12px;line-height:1.55;
  background:rgba(255,204,102,.12);
  border:1px solid rgba(255,204,102,.35);
  color:#ffe7b3;
}

.wheel-wrap{display:flex;flex-direction:column;align-items:center}
.pointer{
  width:0;height:0;
  border-left:12px solid transparent;
  border-right:12px solid transparent;
  border-top:22px solid #fff;
  margin-bottom:-6px;
}
canvas{width:min(88vw,320px);height:min(88vw,320px);display:block}

.buttons{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}
button{
  border:none;border-radius:14px;padding:14px 0;
  font-size:15px;font-weight:900;
}
button.primary{background:#fff;color:#000}
button.secondary{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.35)}
button:disabled{opacity:.55}

.panel{
  margin-top:12px;background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.18);
  border-radius:14px;padding:12px;
}
.panel .label{font-size:12px;opacity:.7}
.panel .value{margin-top:6px;font-size:18px;font-weight:900}

.code-box{
  margin-top:10px;display:none;
  background:rgba(0,0,0,.25);
  border:1px solid rgba(255,255,255,.25);
  border-radius:14px;padding:10px;
}
.code-box .k{font-size:12px;opacity:.7}
.code-box .v{margin-top:4px;font-size:18px;font-weight:900}
.copy{margin-top:8px;width:100%}

.redirect-area{display:none;margin-top:12px}
.redirect-btn{
  width:100%;padding:16px 0;
  font-size:16px;font-weight:900;
  border-radius:16px;
  background:#ff0050;color:#fff;
}
.redirect-btn.attention{
  animation:pulse 1.4s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(255,0,80,.6)}
  70%{box-shadow:0 0 0 14px rgba(255,0,80,0)}
  100%{box-shadow:0 0 0 0 rgba(255,0,80,0)}
}

.bottom-hint{
  margin-top:12px;padding:12px;
  border-radius:14px;
  background:rgba(255,204,102,.18);
  border:1px solid rgba(255,204,102,.35);
  font-weight:900;text-align:center;
  display:none;
}

.toast{
  position:fixed;left:50%;top:18%;
  transform:translateX(-50%);
  background:rgba(0,0,0,.85);
  padding:12px 16px;border-radius:12px;
  font-size:13px;z-index:9999;
}
</style>
</head>

<body>
<div class="app">
  <div class="header">
    <h1>抽選ルーレット</h1>
    <div class="badge">キャンペーン</div>
  </div>

  <div class="notice">
    抽選は1日1回まで。<br>
    当選後はTikTokへ進んでください。
  </div>

  <div class="wheel-wrap">
    <div class="pointer"></div>
    <canvas id="wheel"></canvas>
  </div>

  <div class="buttons">
    <button id="spinBtn" class="primary">抽選スタート</button>
    <button class="secondary" disabled>1日1回</button>
  </div>

  <div class="panel">
    <div class="label">抽選結果</div>
    <div class="value" id="resultText">—</div>
  </div>

  <div class="code-box" id="codeBox">
    <div class="k">受付番号</div>
    <div class="v" id="codeText">—</div>
    <button class="secondary copy" id="copyBtn">受付番号をコピー</button>
  </div>

  <div class="redirect-area" id="redirectArea">
    <button class="redirect-btn attention" id="redirectBtn">
      TikTokへ進む
    </button>
  </div>

  <div class="bottom-hint" id="bottomHint">
    🎉 抽選完了｜<b>TikTokへ進んでください</b>
  </div>
</div>

<script>
/* ===== 配置 ===== */
const TIKTOK_URL = "https://tiktok.me/user7273160098661";
const PRIZES = [
  { label: "1,000pt", value: 1000 },
  { label: "2,000pt", value: 2000 },
  { label: "3,000pt", value: 3000 },
  { label: "5,000pt", value: 5000 },
  { label: "10,000pt", value: 10000 },
  { label: "15,000pt", value: 15000 },
  { label: "20,000pt", value: 20000 },
];

/* ===== DOM ===== */
const c = document.getElementById("wheel");
const ctx = c.getContext("2d");
const spinBtn = document.getElementById("spinBtn");
const resultText = document.getElementById("resultText");
const codeBox = document.getElementById("codeBox");
const codeText = document.getElementById("codeText");
const copyBtn = document.getElementById("copyBtn");
const redirectArea = document.getElementById("redirectArea");
const redirectBtn = document.getElementById("redirectBtn");
const bottomHint = document.getElementById("bottomHint");

/* ===== Canvas DPR ===== */
function resizeCanvas(){
  const r=c.getBoundingClientRect();
  const dpr=Math.min(3,window.devicePixelRatio||1);
  c.width=r.width*dpr;c.height=r.height*dpr;
}
resizeCanvas();

/* ===== Wheel ===== */
let angle=0,spinning=false,idx=0;
function draw(){
  const W=c.width,H=c.height,r=W*0.46;
  ctx.clearRect(0,0,W,H);
  ctx.save();
  ctx.translate(W/2,H/2);
  ctx.rotate(angle);
  const step=2*Math.PI/PRIZES.length;
  PRIZES.forEach((p,i)=>{
    ctx.beginPath();
    ctx.moveTo(0,0);
    ctx.arc(0,0,r,i*step,(i+1)*step);
    ctx.fillStyle=`hsl(${i*360/PRIZES.length} 70% 55%)`;
    ctx.fill();
    ctx.save();
    ctx.rotate(i*step+step/2);
    ctx.translate(r*0.65,0);
    ctx.rotate(Math.PI/2);
    ctx.fillStyle="#fff";
    ctx.font="bold 22px sans-serif";
    ctx.textAlign="center";
    ctx.fillText(p.label,0,0);
    ctx.restore();
  });
  ctx.restore();
}
draw();

/* ===== Utils ===== */
function genCode(){return "CP-"+Math.floor(Math.random()*1e6).toString().padStart(6,"0")}
function toast(t){
  const d=document.createElement("div");
  d.className="toast";d.innerHTML=t;
  document.body.appendChild(d);
  setTimeout(()=>d.remove(),1500);
}
async function copyText(t){
  try{await navigator.clipboard.writeText(t);return true}catch(e){return false}
}

/* ===== Spin ===== */
spinBtn.onclick=()=>{
  if(spinning)return;
  spinning=true;spinBtn.disabled=true;
  resultText.textContent="抽選中…";
  idx=Math.floor(Math.random()*PRIZES.length);
  const target=-Math.PI/2-(idx*2*Math.PI/PRIZES.length);
  const start=angle;
  const end=target+Math.PI*2*7;
  const t0=performance.now();
  function anim(t){
    const p=Math.min(1,(t-t0)/4200);
    angle=start+(end-start)*(1-Math.pow(1-p,3));
    draw();
    if(p<1)requestAnimationFrame(anim);
    else finish();
  }
  requestAnimationFrame(anim);
};

function finish(){
  const prize=PRIZES[idx];
  const code=genCode();
  resultText.textContent="🎉 当選："+prize.label;
  codeText.textContent=code;
  codeBox.style.display="block";
  redirectArea.style.display="block";
  bottomHint.style.display="block";
}

/* ===== TikTok 跳转（双保险） ===== */
redirectBtn.onclick=async ()=>{
  await copyText(codeText.textContent);
  toast("受付番号をコピーしました<br>TikTokへ移動します");
  setTimeout(()=>{
    const a=document.createElement("a");
    a.href=TIKTOK_URL;
    a.target="_blank";
    a.rel="noopener";
    document.body.appendChild(a);
    a.click();
    a.remove();
    setTimeout(()=>location.href=TIKTOK_URL,200);
  },300);
};
</script>
</body>
</html>