function esc(s){return String(s==null?'':s).replace(/&/g,'&').replace(/</g,'<').replace(/>/g,'>').replace(/"/g,'"')}
function fmt(d){return d?d.split('-').reverse().join('.'):'весь период'}
function showImg(src){document.getElementById('lightboxImg').src=src;document.getElementById('lightbox').classList.add('open')}
function isImageFile(name){return /\.(jpe?g|png|gif|webp|bmp|avif|svg|ico)$/i.test(name||'')}
function fileType(name){
  if(/\.(jpe?g|png|gif|webp|bmp|avif|svg|ico)$/i.test(name||'')) return 'image';
  if(/\.(mp3|wav|ogg|flac|m4a|aac|opus)$/i.test(name||'')) return 'music';
  if(/\.(pptx?|odp|key)$/i.test(name||'')) return 'presentation';
  if(/\.(pdf|docx?|xlsx?|txt|rtf|odt|ods|csv|md)$/i.test(name||'')) return 'document';
  return 'other';
}
function fileIcon(t){
  const icons = {image:'🖼️',music:'🎵',presentation:'📊',document:'📄',other:'📁'};
  return icons[t]||icons.other;
}
function filesHTML(files, password, shareToken){
  if(!files||!files.length)return '';
  const pw = password ? `?password=${encodeURIComponent(password)}` : '';
  return `<div class="files-block">
    <div class="files-label">Работы резидента</div>
    <div class="files">${files.map(f=>{
      const t = fileType(f.name);
      const url = `/api/share/${shareToken}/files/${f.token}${pw}`;
      return `<a class="ftype-${t}" title="${esc(f.name)}" ${isImageFile(f.name)
        ?`href="#" data-img="${esc(url)}"`
        :`href="${url}" download`}>
        <span class="ficon" alt="${esc(f.name)}">${fileIcon(t)}</span>
      </a>`;
    }).join('')}</div>
  </div>`;
}

let currentToken = '';
let currentPassword = null;

async function fetchShareData(token, password) {
  const headers = {};
  if (password) headers['x-share-password'] = password;
  const res = await fetch('/api/share/' + token, { headers });
  const data = await res.json().catch(() => ({}));
  return { ok: res.ok, status: res.status, data };
}

async function loadShare() {
  const token = location.pathname.split('/').filter(Boolean).pop() || '';
  currentToken = token;
  currentPassword = null;

  const tryLoad = async (pwd) => {
    const result = await fetchShareData(token, pwd);
    if (result.ok) {
      renderShare(result.data, pwd);
      return true;
    }
    if (result.status === 401 && result.data.passwordRequired) {
      showPasswordModal();
      return false;
    }
    if (result.status === 410) {
      showError('Срок действия ссылки истёк');
      return true;
    }
    showError('Ссылка не найдена или была удалена');
    return true;
  };

  await tryLoad(null);
}

function showPasswordModal() {
  document.getElementById('passwordInput').value = '';
  document.getElementById('passwordModal').classList.add('open');
  document.getElementById('passwordInput').focus();
}

function hidePasswordModal() {
  document.getElementById('passwordModal').classList.remove('open');
}

async function submitPassword() {
  const pwd = document.getElementById('passwordInput').value;
  if (!pwd) return;
  const result = await fetchShareData(currentToken, pwd);
  if (result.ok) {
    hidePasswordModal();
    currentPassword = pwd;
    renderShare(result.data, pwd);
  } else {
    alert('Неверный пароль');
    document.getElementById('passwordInput').value = '';
    document.getElementById('passwordInput').focus();
  }
}

function showError(msg) {
  document.getElementById('title').textContent = msg;
  document.getElementById('grid').innerHTML = `<div class="empty"><div class="big">🤔</div>${esc(msg)}</div>`;
  document.getElementById('photosBlock').style.display = 'none';
}

function renderShare(data, password) {
  const heading = data.group_name || data.name || 'Записи занятий';
  document.title = heading;
  document.getElementById('title').textContent = heading;
  const chips = [];
  if (data.group_name) chips.push(`Группа: <b>${esc(data.group_name)}</b>`);
  if (data.date_from || data.date_to) chips.push(`Период: <b>${fmt(data.date_from)}</b> — <b>${fmt(data.date_to)}</b>`);
  document.getElementById('chips').innerHTML = chips.map(c => `<span class="chip">${c}</span>`).join('');

  const pb = document.getElementById('photosBlock');
  if (data.photos && data.photos.length) {
    document.getElementById('photosGrid').innerHTML = data.photos.map(p => `
      <a class="gphoto" href="#" data-img="${esc(p.photo_path)}">
        <img src="${p.photo_path}" alt="${esc(p.caption || '')}" loading="lazy">
        ${p.caption ? `<div class="gcap">${esc(p.caption)}</div>` : ''}
      </a>
    `).join('');
    pb.style.display = 'block';
  } else {
    pb.style.display = 'none';
  }

  const grid = document.getElementById('grid');
  if (!data.entries.length) {
    grid.innerHTML = '<div class="empty"><div class="big">🎈</div>Записей пока нет</div>';
    return;
  }
  const isAnonymized = data.anonymize_names;
  grid.innerHTML = data.entries.map(e => `
    <div class="card">
      <div class="photo">
        ${e.photo_path
          ? `<img src="${e.photo_path}" data-img="${esc(e.photo_path)}" alt="">`
          : `<div class="no-photo"><svg viewBox="0 0 240 160" preserveAspectRatio="xMidYMid meet" aria-hidden="true"><circle cx="105" cy="48" r="15"/><path d="M74 140 C74 106 88 92 105 92 C122 92 136 106 136 140 Z"/><circle cx="145" cy="58" r="18"/><path d="M108 144 C108 104 124 88 145 88 C166 88 182 104 182 144 Z"/></svg></div>`}
      </div>
      <div class="body">
        ${!isAnonymized ? `<div class="name">${esc(e.student_name)}</div>` : ''}
        ${!isAnonymized && e.group_name ? `<div><span class="group">${esc(e.group_name)}</span></div>` : ''}
        <div class="desc">${esc(e.description)}</div>
        ${filesHTML(e.files, password, currentToken)}
      </div>
      <div class="foot">${new Date(e.created_at).toLocaleString('ru',{day:'2-digit',month:'2-digit',year:'numeric',hour:'2-digit',minute:'2-digit'})}</div>
    </div>
  `).join('');
}

document.getElementById('lightbox').addEventListener('click', () => document.getElementById('lightbox').classList.remove('open'));
document.getElementById('passwordModal').querySelector('button').addEventListener('click', submitPassword);

document.addEventListener('click', e => {
  const imgEl = e.target.closest('[data-img]');
  if (imgEl) { e.preventDefault(); showImg(imgEl.dataset.img); }
});

(async()=>{
  await loadShare();
})();