/* ── School System — GSAP Animations & UI Logic ── */

// Wait for GSAP CDN to be ready
document.addEventListener('DOMContentLoaded', () => {

  /* ── Register GSAP Plugins ── */
  if (window.gsap) {
    gsap.registerPlugin(ScrollTrigger);
    initAnimations();
  }

  initSidebar();
  initAlerts();
  initSearch();
  initTooltips();
});

/* ══════════════════════════════════════
   GSAP ANIMATIONS
══════════════════════════════════════ */
function initAnimations() {

  /* Page entrance — topbar */
  gsap.from('.topbar', {
    y: -64, opacity: 0, duration: .5,
    ease: 'power3.out'
  });

  /* Sidebar nav items stagger */
  gsap.from('.nav-item', {
    x: -24, opacity: 0, duration: .4,
    stagger: .04, ease: 'power2.out', delay: .15
  });

  /* Page header */
  gsap.from('.page-header', {
    y: 20, opacity: 0, duration: .5,
    ease: 'power3.out', delay: .2
  });

  /* Stat cards stagger */
  gsap.from('.stat-card', {
    y: 32, opacity: 0, duration: .5,
    stagger: .08, ease: 'power3.out', delay: .3,
    clearProps: 'all'
  });

  /* Animate stat values counting up */
  document.querySelectorAll('.stat-value[data-count]').forEach(el => {
    const target = parseInt(el.dataset.count, 10);
    gsap.from({ val: 0 }, {
      val: target, duration: 1.2, delay: .5,
      ease: 'power2.out',
      onUpdate: function () {
        el.textContent = Math.round(this.targets()[0].val).toLocaleString();
      }
    });
  });

  /* Cards scroll reveal */
  gsap.utils.toArray('.card').forEach((card, i) => {
    gsap.from(card, {
      scrollTrigger: {
        trigger: card,
        start: 'top 88%',
        toggleActions: 'play none none none'
      },
      y: 28, opacity: 0, duration: .5,
      delay: i * .04,
      ease: 'power3.out',
      clearProps: 'all'
    });
  });

  /* Table rows stagger on scroll */
  gsap.utils.toArray('tbody tr').forEach((row, i) => {
    gsap.from(row, {
      scrollTrigger: {
        trigger: row,
        start: 'top 92%',
        toggleActions: 'play none none none'
      },
      x: -16, opacity: 0, duration: .35,
      delay: i * .03,
      ease: 'power2.out',
      clearProps: 'all'
    });
  });

  /* Buttons hover micro-animation */
  document.querySelectorAll('.btn').forEach(btn => {
    btn.addEventListener('mouseenter', () => {
      gsap.to(btn, { scale: 1.03, duration: .15, ease: 'power1.out' });
    });
    btn.addEventListener('mouseleave', () => {
      gsap.to(btn, { scale: 1, duration: .15, ease: 'power1.out' });
    });
  });

  /* Progress bars animate in */
  document.querySelectorAll('.progress-bar').forEach(bar => {
    const width = bar.style.width || bar.dataset.width || '0%';
    bar.style.width = '0%';
    gsap.to(bar, {
      scrollTrigger: { trigger: bar, start: 'top 90%' },
      width: width, duration: .9, ease: 'power3.out', delay: .1
    });
  });

  /* Notice cards */
  gsap.utils.toArray('.notice-card').forEach((card, i) => {
    gsap.from(card, {
      scrollTrigger: { trigger: card, start: 'top 90%' },
      y: 20, opacity: 0, duration: .4,
      delay: i * .06, ease: 'power2.out', clearProps: 'all'
    });
  });

  /* Login card */
  const loginCard = document.querySelector('.login-card');
  if (loginCard) {
    gsap.from(loginCard, {
      y: 40, opacity: 0, scale: .96,
      duration: .6, ease: 'power3.out'
    });
    gsap.from('.login-card .form-group', {
      y: 16, opacity: 0, duration: .4,
      stagger: .08, delay: .3, ease: 'power2.out'
    });
  }

  /* Dashboard welcome banner */
  const banner = document.querySelector('.dashboard-banner');
  if (banner) {
    gsap.from(banner, {
      y: -20, opacity: 0, duration: .6, ease: 'power3.out', delay: .1
    });
    gsap.from(banner.querySelectorAll('h1, p, .btn'), {
      y: 16, opacity: 0, stagger: .1, duration: .5, delay: .3, ease: 'power2.out'
    });
  }
}

/* ══════════════════════════════════════
   SIDEBAR TOGGLE (mobile)
══════════════════════════════════════ */
function initSidebar() {
  const toggle = document.getElementById('sidebar-toggle');
  const sidebar = document.querySelector('.sidebar');
  const overlay = document.getElementById('sidebar-overlay');

  if (!toggle || !sidebar) return;

  toggle.addEventListener('click', () => {
    const isOpen = sidebar.classList.toggle('open');
    if (overlay) overlay.classList.toggle('active', isOpen);
    if (window.gsap) {
      gsap.from(sidebar, { x: -260, duration: .3, ease: 'power3.out' });
    }
  });

  if (overlay) {
    overlay.addEventListener('click', () => {
      sidebar.classList.remove('open');
      overlay.classList.remove('active');
    });
  }
}

/* ══════════════════════════════════════
   AUTO-DISMISS ALERTS
══════════════════════════════════════ */
function initAlerts() {
  document.querySelectorAll('.alert').forEach(alert => {
    const close = alert.querySelector('.alert-close');
    if (close) {
      close.addEventListener('click', () => dismissAlert(alert));
    }
    setTimeout(() => dismissAlert(alert), 5000);
  });
}

function dismissAlert(alert) {
  if (!alert.parentNode) return;
  if (window.gsap) {
    gsap.to(alert, {
      opacity: 0, y: -8, height: 0, marginBottom: 0,
      padding: 0, duration: .3, ease: 'power2.in',
      onComplete: () => alert.remove()
    });
  } else {
    alert.remove();
  }
}

/* ══════════════════════════════════════
   LIVE SEARCH FILTER (client-side)
══════════════════════════════════════ */
function initSearch() {
  const searchInput = document.getElementById('table-search');
  if (!searchInput) return;

  searchInput.addEventListener('input', () => {
    const q = searchInput.value.toLowerCase();
    document.querySelectorAll('tbody tr').forEach(row => {
      const text = row.textContent.toLowerCase();
      row.style.display = text.includes(q) ? '' : 'none';
    });
  });
}

/* ══════════════════════════════════════
   SIMPLE TOOLTIPS
══════════════════════════════════════ */
function initTooltips() {
  document.querySelectorAll('[data-tooltip]').forEach(el => {
    el.addEventListener('mouseenter', e => {
      const tip = document.createElement('div');
      tip.className = 'gsap-tooltip';
      tip.textContent = el.dataset.tooltip;
      tip.style.cssText = `
        position:fixed;background:#0f172a;color:#fff;font-size:12px;
        padding:5px 10px;border-radius:6px;pointer-events:none;z-index:9999;
        white-space:nowrap;box-shadow:0 4px 12px rgba(0,0,0,.2);
      `;
      document.body.appendChild(tip);
      const rect = el.getBoundingClientRect();
      tip.style.left = rect.left + rect.width / 2 - tip.offsetWidth / 2 + 'px';
      tip.style.top = rect.top - tip.offsetHeight - 8 + 'px';
      if (window.gsap) gsap.from(tip, { opacity: 0, y: 4, duration: .15 });
      el._tooltip = tip;
    });
    el.addEventListener('mouseleave', () => {
      if (el._tooltip) { el._tooltip.remove(); el._tooltip = null; }
    });
  });
}