/**
 * 亿图腾 · 浠艾福 — 企业官网交互脚本
 * Mobile nav, scroll animations, header effects
 */

document.addEventListener('DOMContentLoaded', () => {

  // --------------------------------------------------------
  // 1. Mobile Nav Toggle
  // --------------------------------------------------------
  const navToggle = document.getElementById('navToggle');
  const nav = document.getElementById('nav');

  if (navToggle && nav) {
    navToggle.addEventListener('click', () => {
      navToggle.classList.toggle('active');
      nav.classList.toggle('open');
      const isOpen = nav.classList.contains('open');
      navToggle.setAttribute('aria-label', isOpen ? '关闭导航' : '切换导航');
    });

    // Close nav on link click
    nav.querySelectorAll('.nav-link').forEach(link => {
      link.addEventListener('click', () => {
        navToggle.classList.remove('active');
        nav.classList.remove('open');
        navToggle.setAttribute('aria-label', '切换导航');
      });
    });
  }

  // --------------------------------------------------------
  // 2. Header shadow on scroll
  // --------------------------------------------------------
  const header = document.getElementById('header');
  if (header) {
    let ticking = false;
    window.addEventListener('scroll', () => {
      if (!ticking) {
        requestAnimationFrame(() => {
          header.classList.toggle('scrolled', window.scrollY > 40);
          ticking = false;
        });
        ticking = true;
      }
    }, { passive: true });
  }

  // --------------------------------------------------------
  // 3. Active nav link tracking (Intersection Observer)
  // --------------------------------------------------------
  const sections = document.querySelectorAll('section[id]');
  const navLinks = document.querySelectorAll('.nav-link');

  if (sections.length && navLinks.length) {
    const observerOptions = {
      rootMargin: '-50% 0px -50% 0px',
      threshold: 0
    };

    const sectionObserver = new IntersectionObserver((entries) => {
      entries.forEach(entry => {
        if (entry.isIntersecting) {
          const id = entry.target.getAttribute('id');
          navLinks.forEach(link => {
            link.classList.remove('active');
            if (link.getAttribute('href') === `#${id}`) {
              link.classList.add('active');
            }
          });
        }
      });
    }, observerOptions);

    sections.forEach(section => sectionObserver.observe(section));
  }

  // --------------------------------------------------------
  // 4. Scroll-triggered reveal animations
  // --------------------------------------------------------
  const revealElements = document.querySelectorAll(
    '.about-card, .dimension-card, .feature-card, .role-card, ' +
    '.stat, .contact-item, .cta-card, .product-quote, .pillar-card'
  );

  if (revealElements.length) {
    // Add reveal class
    revealElements.forEach(el => el.classList.add('reveal'));

    const revealObserver = new IntersectionObserver((entries) => {
      entries.forEach(entry => {
        if (entry.isIntersecting) {
          // Stagger animation based on index
          const siblings = Array.from(entry.target.parentElement.children)
            .filter(child => child.classList.contains('reveal'));
          const index = siblings.indexOf(entry.target);
          entry.target.style.transitionDelay = `${index * 80}ms`;
          entry.target.classList.add('visible');
          revealObserver.unobserve(entry.target);
        }
      });
    }, {
      threshold: 0.15,
      rootMargin: '0px 0px -40px 0px'
    });

    revealElements.forEach(el => revealObserver.observe(el));
  }

  // --------------------------------------------------------
  // 5. Smooth scroll for anchor links (progressive enhancement)
  // --------------------------------------------------------
  document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', (e) => {
      const targetId = anchor.getAttribute('href');
      if (targetId === '#') return;

      const target = document.querySelector(targetId);
      if (target) {
        e.preventDefault();
        const headerOffset = 64; // --header-height
        const targetPosition = target.getBoundingClientRect().top + window.scrollY - headerOffset;

        window.scrollTo({
          top: targetPosition,
          behavior: 'smooth'
        });
      }
    });
  });

  // --------------------------------------------------------
  // 6. Orbit animation pause on hover (accessibility)
  // --------------------------------------------------------
  const orbitItems = document.querySelectorAll('.orbit-item');
  orbitItems.forEach(item => {
    item.addEventListener('mouseenter', () => {
      item.style.animationPlayState = 'paused';
    });
    item.addEventListener('mouseleave', () => {
      item.style.animationPlayState = 'running';
    });
  });

  // --------------------------------------------------------
  // 7. Performance: debounced resize handler
  // --------------------------------------------------------
  let resizeTimer;
  window.addEventListener('resize', () => {
    clearTimeout(resizeTimer);
    resizeTimer = setTimeout(() => {
      // Close mobile nav on resize to desktop
      if (window.innerWidth > 768 && nav && nav.classList.contains('open')) {
        navToggle.classList.remove('active');
        nav.classList.remove('open');
        navToggle.setAttribute('aria-label', '切换导航');
      }
      // Redraw wuxing canvas on resize
      drawWuxingDiagram();
    }, 200);
  }, { passive: true });

  // --------------------------------------------------------
  // 8. Wuxing Diagram — Canvas 2D (redesigned elegant version)
  // --------------------------------------------------------
  function drawWuxingDiagram() {
    const canvas = document.getElementById('wuxingCanvas');
    if (!canvas) return;

    const container = canvas.parentElement;
    const size = container.clientWidth;
    if (size < 10) return;

    const dpr = window.devicePixelRatio || 1;
    canvas.width = size * dpr;
    canvas.height = size * dpr;
    canvas.style.width = size + 'px';
    canvas.style.height = size + 'px';

    const ctx = canvas.getContext('2d');
    ctx.scale(dpr, dpr);

    const cx = size / 2;
    const cy = size / 2;
    const outerR = size * 0.38;

    // ---- calculate 5 outer vertices ----
    function calcPentagonVertices(cx, cy, radius) {
      const pts = [];
      for (let i = 0; i < 5; i++) {
        const angle = -Math.PI / 2 + i * 2 * Math.PI / 5;
        pts.push({
          x: cx + radius * Math.cos(angle),
          y: cy + radius * Math.sin(angle)
        });
      }
      return pts;
    }

    const outer = calcPentagonVertices(cx, cy, outerR);

    // dimension data [身, 智, 富, 行, 心] (top clockwise)
    const dims = [
      { name: '身', element: '土', color: '#5D4037', bg: '#F5EFEB', desc: '根基永固' },
      { name: '智', element: '金', color: '#C0A060', bg: '#F9F4EC', desc: '赋能未来' },
      { name: '富', element: '水', color: '#0EA5E9', bg: '#ECFEFF', desc: '利他创富' },
      { name: '行', element: '木', color: '#10B981', bg: '#ECFDF5', desc: '人际和谐' },
      { name: '心', element: '火', color: '#EF4444', bg: '#FEF2F2', desc: '子女传承' }
    ];

    // ---- helpers ----
    function midPoint(p1, p2) {
      return { x: (p1.x + p2.x) / 2, y: (p1.y + p2.y) / 2 };
    }

    // ================================================================
    // 1. Background — soft radial glow
    // ================================================================
    var bgGrad = ctx.createRadialGradient(cx, cy, 0, cx, cy, outerR * 1.4);
    bgGrad.addColorStop(0, 'rgba(74, 155, 215, 0.04)');
    bgGrad.addColorStop(0.6, 'rgba(74, 155, 215, 0.02)');
    bgGrad.addColorStop(1, 'rgba(74, 155, 215, 0)');
    ctx.fillStyle = bgGrad;
    ctx.beginPath();
    ctx.arc(cx, cy, outerR * 1.4, 0, Math.PI * 2);
    ctx.fill();

    // ================================================================
    // 2. Outer orbit ring
    // ================================================================
    ctx.beginPath();
    ctx.arc(cx, cy, outerR + outerR * 0.08, 0, Math.PI * 2);
    ctx.strokeStyle = 'rgba(180, 170, 160, 0.25)';
    ctx.lineWidth = 1;
    ctx.setLineDash([3, 5]);
    ctx.stroke();
    ctx.setLineDash([]);

    // Inner orbit ring
    ctx.beginPath();
    ctx.arc(cx, cy, outerR * 0.55, 0, Math.PI * 2);
    ctx.strokeStyle = 'rgba(180, 170, 160, 0.12)';
    ctx.lineWidth = 1;
    ctx.setLineDash([2, 4]);
    ctx.stroke();
    ctx.setLineDash([]);

    // ================================================================
    // 3. 相克 (pentagram star) — drawn first so it sits behind
    // ================================================================
    var keOrder = [0, 2, 4, 1, 3]; // 身→富→心→智→行→身
    var keColor = 'rgba(74, 155, 215, 0.45)';
    var nodeR = Math.max(24, size * 0.068);

    for (var i = 0; i < 5; i++) {
      var from = outer[keOrder[i % 5]];
      var to = outer[keOrder[(i + 1) % 5]];

      // dashed line
      ctx.beginPath();
      ctx.moveTo(from.x, from.y);
      ctx.lineTo(to.x, to.y);
      ctx.strokeStyle = keColor;
      ctx.lineWidth = 1.5;
      ctx.setLineDash([4, 5]);
      ctx.stroke();
      ctx.setLineDash([]);

      // Arrow near the end (before the target node)
      var dx = to.x - from.x;
      var dy = to.y - from.y;
      var len = Math.sqrt(dx * dx + dy * dy) || 1;
      var arrowDist = nodeR + 8;
      var ax = to.x - (dx / len) * arrowDist;
      var ay = to.y - (dy / len) * arrowDist;
      var angle = Math.atan2(dy, dx);
      var s = 8;
      ctx.save();
      ctx.translate(ax, ay);
      ctx.rotate(angle);
      ctx.beginPath();
      ctx.moveTo(s, 0);
      ctx.lineTo(-s * 0.5, -s * 0.6);
      ctx.lineTo(-s * 0.5, s * 0.6);
      ctx.closePath();
      ctx.fillStyle = 'rgba(74, 155, 215, 0.6)';
      ctx.fill();
      ctx.restore();
    }

    // ================================================================
    // 4. 相生 (outer pentagon) — elegant gradient lines
    // ================================================================
    var shengColors = ['#4ECDC4', '#45B7AA', '#4ECDC4', '#45B7AA', '#4ECDC4'];

    for (var i = 0; i < 5; i++) {
      var from = outer[i];
      var to = outer[(i + 1) % 5];

      // Glow shadow under the line
      ctx.beginPath();
      ctx.moveTo(from.x, from.y);
      ctx.lineTo(to.x, to.y);
      ctx.strokeStyle = 'rgba(78, 205, 196, 0.15)';
      ctx.lineWidth = 6;
      ctx.shadowColor = 'rgba(78, 205, 196, 0.3)';
      ctx.shadowBlur = 8;
      ctx.stroke();
      ctx.shadowColor = 'transparent';
      ctx.shadowBlur = 0;

      // Main line with gradient
      var grad = ctx.createLinearGradient(from.x, from.y, to.x, to.y);
      grad.addColorStop(0, shengColors[i]);
      grad.addColorStop(1, shengColors[(i + 1) % 5]);
      ctx.beginPath();
      ctx.moveTo(from.x, from.y);
      ctx.lineTo(to.x, to.y);
      ctx.strokeStyle = grad;
      ctx.lineWidth = 2.5;
      ctx.lineCap = 'round';
      ctx.stroke();

      // Elegant arrow at midpoint
      var mp = midPoint(from, to);
      var angle = Math.atan2(to.y - from.y, to.x - from.x);
      var s = 11;
      ctx.save();
      ctx.translate(mp.x, mp.y);
      ctx.rotate(angle);
      ctx.beginPath();
      ctx.moveTo(s, 0);
      ctx.lineTo(-s * 0.4, -s * 0.5);
      ctx.lineTo(-s * 0.2, 0);
      ctx.lineTo(-s * 0.4, s * 0.5);
      ctx.closePath();
      ctx.fillStyle = 'rgba(78, 205, 196, 0.8)';
      ctx.fill();
      ctx.restore();
    }

    // ================================================================
    // 5. Dimension nodes — multi-layered polished circles
    // ================================================================

    for (var i = 0; i < 5; i++) {
      var v = outer[i];
      var d = dims[i];

      // Outer soft glow
      var glowGrad = ctx.createRadialGradient(v.x, v.y, nodeR * 0.3, v.x, v.y, nodeR * 2.2);
      glowGrad.addColorStop(0, d.color + '22');
      glowGrad.addColorStop(1, d.color + '00');
      ctx.fillStyle = glowGrad;
      ctx.beginPath();
      ctx.arc(v.x, v.y, nodeR * 2.2, 0, Math.PI * 2);
      ctx.fill();

      // Outer ring (stroke only)
      ctx.beginPath();
      ctx.arc(v.x, v.y, nodeR + 4, 0, Math.PI * 2);
      ctx.strokeStyle = d.color + '55';
      ctx.lineWidth = 1.5;
      ctx.stroke();

      // Inner white fill
      ctx.beginPath();
      ctx.arc(v.x, v.y, nodeR, 0, Math.PI * 2);
      ctx.fillStyle = d.bg;
      ctx.fill();

      // Colored border
      ctx.beginPath();
      ctx.arc(v.x, v.y, nodeR, 0, Math.PI * 2);
      ctx.strokeStyle = d.color;
      ctx.lineWidth = 2.5;
      ctx.stroke();

      // Soft inner highlight (top-left)
      var hlGrad = ctx.createRadialGradient(
        v.x - nodeR * 0.3, v.y - nodeR * 0.3, 0,
        v.x, v.y, nodeR
      );
      hlGrad.addColorStop(0, 'rgba(255,255,255,0.6)');
      hlGrad.addColorStop(0.5, 'rgba(255,255,255,0)');
      hlGrad.addColorStop(1, 'rgba(0,0,0,0.03)');
      ctx.beginPath();
      ctx.arc(v.x, v.y, nodeR, 0, Math.PI * 2);
      ctx.fillStyle = hlGrad;
      ctx.fill();

      // Dimension name
      var fs = Math.max(15, nodeR * 0.58);
      ctx.font = 'bold ' + fs + 'px "PingFang SC","Microsoft YaHei",sans-serif';
      ctx.textAlign = 'center';
      ctx.textBaseline = 'middle';
      ctx.fillStyle = d.color;
      ctx.fillText(d.name, v.x, v.y - fs * 0.25);

      // Element badge (small pill below name)
      var elemSize = Math.max(10, fs * 0.5);
      ctx.font = elemSize + 'px "PingFang SC","Microsoft YaHei",sans-serif';
      ctx.fillStyle = d.color;
      ctx.globalAlpha = 0.55;
      ctx.fillText(d.element, v.x, v.y + fs * 0.55);
      ctx.globalAlpha = 1;

      // Small decorative dot on outer ring (node edge highlight)
      for (var dAngle = 0; dAngle < 5; dAngle++) {
        var da = -Math.PI / 2 + dAngle * 2 * Math.PI / 5;
        var dx = v.x + (nodeR + 2) * Math.cos(da);
        var dy = v.y + (nodeR + 2) * Math.sin(da);
        ctx.beginPath();
        ctx.arc(dx, dy, 1.5, 0, Math.PI * 2);
        ctx.fillStyle = d.color + '66';
        ctx.fill();
      }
    }

    // ================================================================
    // 6. Center — Tai Chi overlay (handled by HTML/CSS SVG)
    // ================================================================
    // (The center emblem is replaced by the .taiji-center SVG overlay.)
  }

  // --------------------------------------------------------
  // 8. Knowledge Base — fetch featured articles from API
  // --------------------------------------------------------
  const API_BASE = 'https://cfc.etotem.com.cn';

  (function loadFeaturedArticles() {
    const grid = document.getElementById('knowledgeGrid');
    const loading = document.getElementById('knowledgeLoading');
    if (!grid) return;

    fetch(API_BASE + '/api/articles/featured', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ size: 4 })
    })
    .then(function (res) { return res.json(); })
    .then(function (result) {
      if (loading) loading.style.display = 'none';
      if (!result.data || !result.data.length) {
        grid.innerHTML = '<p class="knowledge-error">暂无内容，敬请期待</p>';
        return;
      }
      var html = '';
      var dimColors = {
        '身': '#FF8C42', '智': '#6366F1', '富': '#F59E0B',
        '行': '#10B981', '心': '#FF6B9D'
      };
      result.data.forEach(function (article) {
        var relatedDim = article.relatedDimensions || '';
        var dimTag = '';
        if (relatedDim && dimColors[relatedDim]) {
          dimTag = '<span class="dimension-tag" style="background:' + dimColors[relatedDim] + '">' + relatedDim + '</span>';
        } else if (relatedDim) {
          dimTag = '<span class="dimension-tag" style="background:#4A9BD7">' + relatedDim + '</span>';
        }
        var coverHtml = article.coverImage
          ? '<img class="knowledge-card-cover" src="' + API_BASE + article.coverImage + '" alt="' + article.title + '" loading="lazy">'
          : '<div class="knowledge-card-cover"><svg viewBox="0 0 24 24" width="40" height="40" fill="none" stroke="currentColor" stroke-width="1.5"><path d="M4 19.5A2.5 2.5 0 016.5 17H20"/><path d="M6.5 2H20v20H6.5A2.5 2.5 0 014 19.5v-15A2.5 2.5 0 016.5 2z"/><path d="M8 7h6M8 11h8M8 15h4"/></svg></div>';
        var catName = article.categoryName || '';
        html += '<div class="knowledge-card">'
          + coverHtml
          + '<div class="knowledge-card-body">'
          + (catName ? '<span class="knowledge-card-category">' + catName + '</span>' : '')
          + '<h3 class="knowledge-card-title">' + article.title + '</h3>'
          + (article.summary ? '<p class="knowledge-card-summary">' + article.summary + '</p>' : '')
          + '<div class="knowledge-card-meta">'
          + dimTag
          + (article.readTime ? '<span>阅读约 ' + article.readTime + ' 分钟</span>' : '')
          + '</div></div></div>';
      });
      grid.innerHTML = html;
    })
    .catch(function () {
      if (loading) loading.style.display = 'none';
      grid.innerHTML = '<p class="knowledge-error">暂时无法加载，请稍后再试</p>';
    });
  })();

  // --------------------------------------------------------
  // 9. Floating CTA toggle
  // --------------------------------------------------------
  const floatCtaBtn = document.getElementById('floatCtaBtn');
  const floatCtaPopup = document.getElementById('floatCtaPopup');
  const floatCtaClose = document.getElementById('floatCtaClose');

  if (floatCtaBtn && floatCtaPopup) {
    floatCtaBtn.addEventListener('click', (e) => {
      e.stopPropagation();
      floatCtaPopup.classList.toggle('open');
    });

    if (floatCtaClose) {
      floatCtaClose.addEventListener('click', (e) => {
        e.stopPropagation();
        floatCtaPopup.classList.remove('open');
      });
    }

    document.addEventListener('click', () => {
      floatCtaPopup.classList.remove('open');
    });

    floatCtaPopup.addEventListener('click', (e) => {
      e.stopPropagation();
    });
  }

  // --------------------------------------------------------
  // 9. Cookie consent banner
  // --------------------------------------------------------
  const cookieConsent = document.getElementById('cookieConsent');
  const cookieConsentBtn = document.getElementById('cookieConsentBtn');

  if (cookieConsent && cookieConsentBtn) {
    if (!localStorage.getItem('cookieConsent')) {
      setTimeout(() => cookieConsent.classList.add('visible'), 600);
    }

    cookieConsentBtn.addEventListener('click', () => {
      cookieConsent.classList.remove('visible');
      localStorage.setItem('cookieConsent', 'true');
    });
  }

  // Initial draw
  drawWuxingDiagram();

  // Redraw on orientation/resize via ResizeObserver
  if (window.ResizeObserver) {
    const wuxingContainer = document.querySelector('.wuxing-diagram');
    if (wuxingContainer) {
      const ro = new ResizeObserver(() => drawWuxingDiagram());
      ro.observe(wuxingContainer);
    }
  }
  
});

// --------------------------------------------------------
// 9. User behavior analytics — Clarity custom events
// --------------------------------------------------------
(function() {
  var SCROLL_DEPTHS = [25, 50, 75, 90, 100];
  var reportedDepths = {};

  function trackScrollDepth() {
    var docHeight = document.documentElement.scrollHeight - window.innerHeight;
    if (docHeight <= 0) return;
    var scrolled = Math.round((window.scrollY / docHeight) * 100);

    SCROLL_DEPTHS.forEach(function(depth) {
      if (scrolled >= depth && !reportedDepths[depth]) {
        reportedDepths[depth] = true;
        if (window.clarity) {
          window.clarity('event', 'scroll_depth', { depth: depth + '%' });
        }
      }
    });
  }

  var scrollTick = false;
  window.addEventListener('scroll', function() {
    if (!scrollTick) {
      requestAnimationFrame(function() {
        trackScrollDepth();
        scrollTick = false;
      });
      scrollTick = true;
    }
  }, { passive: true });

  document.addEventListener('click', function(e) {
    var target = e.target.closest('a, button');
    if (!target) return;

    var eventData = {};
    if (target.tagName === 'A') {
      var href = target.getAttribute('href') || '';
      var text = (target.textContent || '').trim().slice(0, 40);
      if (href.startsWith('#')) {
        eventData = { type: 'anchor', target: href, text: text };
      } else if (href.startsWith('http') || href.startsWith('//')) {
        eventData = { type: 'outbound', target: href, text: text };
      } else {
        eventData = { type: 'internal', target: href, text: text };
      }
      if (target.getAttribute('target') === '_blank') {
        eventData.external = true;
      }
    }
    if (target.tagName === 'BUTTON') {
      eventData = { type: 'button', text: (target.textContent || '').trim().slice(0, 40) };
    }
    if (window.clarity && eventData.type) {
      window.clarity('event', 'cta_click', eventData);
    }
  });

  var DWELL_INTERVAL = 30000;
  var MAX_DWELL_BEATS = 10;
  var dwellCount = 0;
  var dwellTimer = setInterval(function() {
    dwellCount++;
    if (window.clarity) {
      window.clarity('event', 'dwell', { seconds: dwellCount * 30 });
    }
    if (dwellCount >= MAX_DWELL_BEATS) {
      clearInterval(dwellTimer);
    }
  }, DWELL_INTERVAL);

  if (window.clarity) {
    window.clarity('event', 'session_info', {
      width: screen.width,
      height: screen.height,
      referrer: document.referrer || '(direct)'
    });
  }
})();