import { getItems, spinWheel, getBgColor, getTitleSettings } from './api.js';

const canvas = document.getElementById('wheel');
const ctx = canvas.getContext('2d');
const btn = document.getElementById('spin-btn');
const result = document.getElementById('result');

const DARK = { edge: '#6D0025', main: '#cb183d', highlight: '#E8005E', text: '#fff' };
const LIGHT = { edge: '#D4889A', main: '#FAD4DC', highlight: '#FFF0F3', text: '#7B0030' };

let audioCtx = null;
function getAudioCtx() {
  if (!audioCtx || audioCtx.state === 'closed') {
    audioCtx = new (window.AudioContext || window.webkitAudioContext)();
  }
  if (audioCtx.state === 'suspended') audioCtx.resume();
  return audioCtx;
}

let items = [];
let angle = 0;
let spinning = false;
let lampOn = true;

function applyBg() {
  const color = getBgColor();
  document.getElementById('main-body').style.background =
    `radial-gradient(ellipse at center, ${color}DD 0%, ${color} 55%, ${color}BB 100%)`;
}

function applyTitle() {
  const settings = getTitleSettings();
  const h1 = document.querySelector('.page h1');
  if (h1) {
    h1.textContent = settings.text;
    h1.style.color = settings.color;
    h1.style.textShadow = `0 0 20px ${settings.color}80`;
  }
}

async function init() {
  applyBg();
  applyTitle();
  window.addEventListener('storage', (e) => {
    if (e.key === 'wheelBgColor') applyBg();
    if (e.key === 'wheelTitleSettings') applyTitle();
  });
  items = await getItems();
  draw(angle);
  setInterval(() => {
    lampOn = !lampOn;
    draw(angle);
  }, 600);
}

function getTheme(i, total) {
  if (total % 2 === 0) {
    return i % 2 === 0 ? DARK : LIGHT;
  } else {
    if (i === total - 1) return DARK;
    return i % 2 === 0 ? DARK : LIGHT;
  }
}

function drawSegment(cx, cy, r, start, end, theme) {
  ctx.beginPath();
  ctx.moveTo(cx, cy);
  ctx.arc(cx, cy, r, start, end);
  ctx.closePath();
  ctx.fillStyle = theme.edge;
  ctx.fill();

  const mid = (start + end) / 2;
  const gx = cx + r * 0.5 * Math.cos(mid);
  const gy = cy + r * 0.5 * Math.sin(mid);
  const grad = ctx.createRadialGradient(gx, gy, 0, cx, cy, r);
  grad.addColorStop(0, theme.highlight);
  grad.addColorStop(0.45, theme.main);
  grad.addColorStop(1, theme.edge);

  ctx.beginPath();
  ctx.moveTo(cx, cy);
  ctx.arc(cx, cy, r - 2, start, end);
  ctx.closePath();
  ctx.fillStyle = grad;
  ctx.fill();

  const hGrad = ctx.createRadialGradient(gx, gy, 0, gx, gy, r * 0.35);
  hGrad.addColorStop(0, 'rgba(255,255,255,0.28)');
  hGrad.addColorStop(1, 'rgba(255,255,255,0)');
  ctx.beginPath();
  ctx.moveTo(cx, cy);
  ctx.arc(cx, cy, r - 2, start, end);
  ctx.closePath();
  ctx.fillStyle = hGrad;
  ctx.fill();
}

function draw(rotation) {
  if (items.length === 0) return;
  const cx = canvas.width / 2;
  const cy = canvas.height / 2;
  const r = cx - 40;
  const slice = (2 * Math.PI) / items.length;
  const total = items.length;

  ctx.clearRect(0, 0, canvas.width, canvas.height);

  ctx.save();
  ctx.shadowColor = 'rgba(0,0,0,0.6)';
  ctx.shadowBlur = 30;
  ctx.shadowOffsetX = 5;
  ctx.shadowOffsetY = 8;
  ctx.beginPath();
  ctx.arc(cx, cy, r + 40, 0, Math.PI * 2);
  ctx.fillStyle = '#1A0008';
  ctx.fill();
  ctx.restore();

  const rimGrad = ctx.createRadialGradient(cx - 28, cy - 28, r, cx, cy, r + 40);
  rimGrad.addColorStop(0, '#A0003A');
  rimGrad.addColorStop(0.3, '#6D0025');
  rimGrad.addColorStop(0.7, '#3D0015');
  rimGrad.addColorStop(1, '#1A0008');
  ctx.beginPath();
  ctx.arc(cx, cy, r + 40, 0, Math.PI * 2);
  ctx.fillStyle = rimGrad;
  ctx.fill();

  items.forEach((item, i) => {
    const start = rotation + i * slice;
    const end = start + slice;
    drawSegment(cx, cy, r, start, end, getTheme(i, total));
  });

  items.forEach((_, i) => {
    const lineAngle = rotation + i * slice;
    const lGrad = ctx.createLinearGradient(
      cx, cy,
      cx + r * Math.cos(lineAngle),
      cy + r * Math.sin(lineAngle)
    );
    lGrad.addColorStop(0, 'rgba(255,215,0,0.3)');
    lGrad.addColorStop(0.4, '#a2922e');
    lGrad.addColorStop(1, '#c8b43b');
    ctx.beginPath();
    ctx.moveTo(cx, cy);
    ctx.lineTo(cx + r * Math.cos(lineAngle), cy + r * Math.sin(lineAngle));
    ctx.strokeStyle = lGrad;
    ctx.lineWidth = 5;
    ctx.stroke();
  });

  items.forEach((item, i) => {
    const start = rotation + i * slice;
    const theme = getTheme(i, total);
    ctx.save();
    ctx.translate(cx, cy);
    ctx.rotate(start + slice / 2);
    ctx.textAlign = 'center';
    ctx.fillStyle = theme.text;
    ctx.font = 'bold 18px Dana';
    ctx.shadowColor = 'rgba(0,0,0,0.6)';
    ctx.shadowBlur = 4;
    const text = item.title;
    const maxWidth = r - 52;
    if (ctx.measureText(text).width > maxWidth) {
      const mid = Math.ceil(text.length / 2);
      ctx.fillText(text.slice(0, mid), (r - 20) / 1.4, -9);
      ctx.fillText(text.slice(mid), (r - 20) / 1.4, 9);
    } else {
      ctx.fillText(text, (r - 20) / 1.4, 5);
    }
    ctx.restore();
  });

  ctx.beginPath();
  ctx.arc(cx, cy, r + 2, 0, Math.PI * 2);
  ctx.strokeStyle = '#dfd498';
  ctx.lineWidth = 4.5;
  ctx.shadowColor = 'rgba(255,215,0,0.9)';
  ctx.shadowBlur = 10;
  ctx.stroke();
  ctx.shadowBlur = 0;

  const lampCount = 24;
  const lampR = r + 23;
  for (let i = 0; i < lampCount; i++) {
    const lampAngle = (i / lampCount) * Math.PI * 2;
    const lx = cx + lampR * Math.cos(lampAngle);
    const ly = cy + lampR * Math.sin(lampAngle);
    const isOn = lampOn ? i % 2 === 0 : i % 2 !== 0;

    if (isOn) {
      const glowGrad = ctx.createRadialGradient(lx, ly, 0, lx, ly, 14);
      glowGrad.addColorStop(0, 'rgba(255,220,80,0.55)');
      glowGrad.addColorStop(1, 'rgba(255,220,80,0)');
      ctx.beginPath();
      ctx.arc(lx, ly, 14, 0, Math.PI * 2);
      ctx.fillStyle = glowGrad;
      ctx.fill();
    }

    const lGrad = ctx.createRadialGradient(lx - 2.5, ly - 2.5, 0.5, lx, ly, 7.5);
    if (isOn) {
      lGrad.addColorStop(0, '#FFFFF5');
      lGrad.addColorStop(0.2, '#FFE566');
      lGrad.addColorStop(0.6, '#FFB300');
      lGrad.addColorStop(1, '#E65100');
      ctx.shadowColor = 'rgba(255,180,0,1)';
      ctx.shadowBlur = 14;
    } else {
      lGrad.addColorStop(0, '#B8954A');
      lGrad.addColorStop(1, '#4A3010');
    }

    ctx.beginPath();
    ctx.arc(lx, ly, 7.5, 0, Math.PI * 2);
    ctx.fillStyle = lGrad;
    ctx.fill();
    ctx.shadowBlur = 0;

    ctx.beginPath();
    ctx.arc(lx, ly, 7.5, 0, Math.PI * 2);
    ctx.strokeStyle = isOn ? '#C8960C' : '#6A4A18';
    ctx.lineWidth = 1.2;
    ctx.stroke();

    ctx.beginPath();
    ctx.arc(lx - 2.5, ly - 2.5, 2.5, 0, Math.PI * 2);
    ctx.fillStyle = isOn ? 'rgba(255,255,255,0.6)' : 'rgba(255,255,255,0.2)';
    ctx.fill();
  }

  ctx.beginPath();
  ctx.arc(cx, cy, r + 35, 0, Math.PI * 2);
  ctx.strokeStyle = '#C8960C';
  ctx.lineWidth = 4.5;
  ctx.shadowColor = 'rgba(150,100,12,0.5)';
  ctx.shadowBlur = 6;
  ctx.stroke();
  ctx.shadowBlur = 0;

  const cGrad = ctx.createRadialGradient(cx - 8, cy - 8, 1, cx, cy, 22);
  cGrad.addColorStop(0, '#FFFFF0');
  cGrad.addColorStop(0.15, '#FFE566');
  cGrad.addColorStop(0.45, '#FFD700');
  cGrad.addColorStop(0.75, '#ff962a');
  cGrad.addColorStop(1, '#b37900');

  ctx.beginPath();
  ctx.arc(cx, cy, 22, 0, Math.PI * 2);
  ctx.fillStyle = cGrad;
  ctx.shadowColor = 'rgba(0,0,0,0.6)';
  ctx.shadowBlur = 14;
  ctx.fill();
  ctx.shadowBlur = 0;

  ctx.beginPath();
  ctx.arc(cx, cy, 22, 0, Math.PI * 2);
  ctx.strokeStyle = '#8B6914';
  ctx.lineWidth = 2;
  ctx.stroke();

  ctx.beginPath();
  ctx.arc(cx - 6, cy - 6, 7, 0, Math.PI * 2);
  ctx.fillStyle = 'rgba(255,255,255,0.3)';
  ctx.fill();

  drawPointer(cx);
}

function drawPointer(cx) {
  ctx.save();
  ctx.shadowColor = 'rgba(0,0,0,0.4)';
  ctx.shadowBlur = 8;
  ctx.shadowOffsetX = 3;
  ctx.shadowOffsetY = 4;
  ctx.beginPath();
  ctx.arc(cx, 20, 17, 0, Math.PI * 2);
  ctx.fillStyle = 'rgba(0,0,0,0.1)';
  ctx.fill();
  ctx.restore();

  const pGrad = ctx.createRadialGradient(cx - 6, 14, 1, cx, 20, 18);
  pGrad.addColorStop(0, '#FFFFF0');
  pGrad.addColorStop(0.15, '#FFE566');
  pGrad.addColorStop(0.45, '#FFD700');
  pGrad.addColorStop(0.75, '#ff962a');
  pGrad.addColorStop(1, '#b37900');

  ctx.beginPath();
  ctx.arc(cx, 20, 17, 0, Math.PI * 2);
  ctx.fillStyle = pGrad;
  ctx.shadowColor = 'rgba(200,150,0,0.8)';
  ctx.shadowBlur = 12;
  ctx.fill();
  ctx.shadowBlur = 0;
  ctx.strokeStyle = '#8B6914';
  ctx.lineWidth = 2;
  ctx.stroke();

  ctx.beginPath();
  ctx.arc(cx - 5, 13, 6, 0, Math.PI * 2);
  ctx.fillStyle = 'rgba(255,255,255,0.35)';
  ctx.fill();

  const triGrad = ctx.createLinearGradient(cx, 34, cx, 62);
  triGrad.addColorStop(0, '#FFE566');
  triGrad.addColorStop(0.35, '#FFD700');
  triGrad.addColorStop(1, '#b37900');

  ctx.beginPath();
  ctx.moveTo(cx - 13, 35);
  ctx.lineTo(cx + 13, 35);
  ctx.lineTo(cx, 62);
  ctx.closePath();
  ctx.fillStyle = triGrad;
  ctx.shadowColor = 'rgba(0,0,0,0.5)';
  ctx.shadowBlur = 8;
  ctx.fill();
  ctx.shadowBlur = 0;
  ctx.strokeStyle = '#8B6914';
  ctx.lineWidth = 1.5;
  ctx.stroke();
}

function playTickSound() {
  try {
    const actx = getAudioCtx();
    const osc = actx.createOscillator();
    const gain = actx.createGain();
    osc.connect(gain);
    gain.connect(actx.destination);
    osc.frequency.value = 600;
    osc.type = 'sine';
    gain.gain.setValueAtTime(0.15, actx.currentTime);
    gain.gain.exponentialRampToValueAtTime(0.001, actx.currentTime + 0.08);
    osc.start(actx.currentTime);
    osc.stop(actx.currentTime + 0.08);
  } catch(e) {}
}

function playWinSound() {
  try {
    const actx = getAudioCtx();
    const notes = [523, 659, 784, 1047];
    notes.forEach((freq, i) => {
      const osc = actx.createOscillator();
      const gain = actx.createGain();
      osc.connect(gain);
      gain.connect(actx.destination);
      osc.frequency.value = freq;
      osc.type = 'sine';
      gain.gain.setValueAtTime(0.2, actx.currentTime + i * 0.15);
      gain.gain.exponentialRampToValueAtTime(0.001, actx.currentTime + i * 0.15 + 0.3);
      osc.start(actx.currentTime + i * 0.15);
      osc.stop(actx.currentTime + i * 0.15 + 0.3);
    });
  } catch(e) {}
}

function showWinnerModal(winner) {
  const modal = document.getElementById('winner-modal');
  const iconMap = { 'پوچ': '', 'کد تخفیف': '', 'لایوکوین': '' };
  document.getElementById('modal-icon').textContent = iconMap[winner.prize_type] || '🎉';
  document.getElementById('modal-prize-type').textContent = winner.prize_type;
  document.getElementById('modal-prize').textContent = winner.prize;
  document.getElementById('modal-description').textContent = winner.description || '';
  modal.classList.remove('hidden');
  document.getElementById('modal-close').onclick = () => modal.classList.add('hidden');
}

btn.onclick = async () => {
  if (spinning || items.length === 0) return;
  spinning = true;
  btn.disabled = true;
  result.textContent = '';

  const data = await spinWheel();
  const winner = data.winner;
  const winnerIdx = items.findIndex(i => i.id === winner.id);
  const slice = (2 * Math.PI) / items.length;

  const targetAngle =
    angle +
    Math.PI * 2 * 8 +
    (-Math.PI / 2 - (winnerIdx * slice + slice / 2) - angle % (Math.PI * 2) + Math.PI * 2 * 3);

  const duration = 5500;
  const startTime = performance.now();
  const from = angle;
  let lastTickIdx = 0;

  function animate(now) {
    const elapsed = now - startTime;
    const t = Math.min(elapsed / duration, 1);
    const ease = 1 - Math.pow(1 - t, 4);
    angle = from + (targetAngle - from) * ease;

    const currentIdx = Math.floor(Math.abs(angle) / slice);
    if (currentIdx !== lastTickIdx) {
      lastTickIdx = currentIdx;
      playTickSound();
    }

    draw(angle);

    if (t < 1) {
      requestAnimationFrame(animate);
    } else {
      spinning = false;
      btn.disabled = false;
      draw(angle);
      playWinSound();
      showWinnerModal(winner);
    }
  }

  requestAnimationFrame(animate);
};

init();