// Links tab: your own bookmarks, grouped. Saved with the other per-person settings (see app.js: store).
// ---- Links: your own bookmarks, grouped, saved with your other settings (private to you, every device)
const safeUrl = s => { let t = String(s || '').trim(); if (!t) return ''; if (!/^[a-z][a-z0-9+.-]*:/i.test(t)) t = 'https://' + t; try { const u = new URL(t); return /^https?:$/.test(u.protocol) ? u.href : ''; } catch { return ''; } };
const linkList = () => { const l = store.get('links', []); return Array.isArray(l) ? l.filter(x => x && safeUrl(x.url)) : []; };
const LINK_COLORS = ['#4f7cff', '#2f9e6e', '#e0742b', '#d9453a', '#8a5cf0', '#e5a00d', '#0f9d9a', '#c2417a'];
const linkColor = l => LINK_COLORS[[...String(l.title || l.url)].reduce((n, c) => n + c.charCodeAt(0), 0) % LINK_COLORS.length];
let linkQuery = '';
function viewLinks() {
  const all = linkList(), q = linkQuery.trim().toLowerCase();
  const shown = q ? all.filter(l => (l.title + ' ' + l.url + ' ' + (l.group || '')).toLowerCase().includes(q)) : all;
  const groups = [...new Set(shown.map(l => l.group || ''))].sort((a, b) => (a === '') - (b === '') || a.localeCompare(b));
  $('#view').innerHTML = `<div class="wrap"><h1>Links</h1>
    <div class="bar"><input type="search" id="lq" placeholder="Filter links" value="${esc(linkQuery)}" aria-label="Filter links" style="flex:1"><button class="btn" id="ladd">${icon('plus')}Add</button></div>
    ${all.length ? '' : '<p class="empty">No links yet. Add the sites you use most; they are saved on your server and show up on every device.</p>'}
    ${all.length && !shown.length ? '<p class="empty">Nothing matches.</p>' : ''}
    ${groups.map(g => `${g ? `<h2>${esc(g)}</h2>` : (groups.length > 1 ? '<h2>Other</h2>' : '')}<div class="list">${shown.filter(l => (l.group || '') === g).map(l => `
      <div class="row"><a class="grow" href="${esc(safeUrl(l.url))}" target="_blank" rel="noopener noreferrer" style="display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none;min-width:0">
        <span class="ic" style="background:${linkColor(l)};color:#fff;font-weight:700">${esc([...(l.title || l.url)][0].toUpperCase())}</span>
        <span class="grow" style="min-width:0"><b>${esc(l.title || l.url)}</b><small style="overflow:hidden;text-overflow:ellipsis;white-space:nowrap">${esc(new URL(safeUrl(l.url)).host)}</small></span></a>
        <button class="btn ghost" data-edit="${esc(l.id)}" aria-label="Edit ${esc(l.title)}" style="min-height:36px">Edit</button></div>`).join('')}</div>`).join('')}</div>`;
  $('#lq').oninput = e => { linkQuery = e.target.value; const p = e.target.selectionStart; viewLinks(); const n = $('#lq'); n.focus(); n.setSelectionRange(p, p); };
  $('#ladd').onclick = () => linkSheet();
  document.querySelectorAll('[data-edit]').forEach(b => b.onclick = () => linkSheet(all.find(l => l.id === b.dataset.edit)));
}
function linkSheet(link) {
  const groups = [...new Set(linkList().map(l => l.group).filter(Boolean))];
  const el = openSheet(link ? 'Edit link' : 'Add a link', '', `<form id="lf"><label for="lt">Name</label><input type="text" id="lt" required autocomplete="off" value="${esc(link ? link.title : '')}" placeholder="Router">
    <label for="lu">Address</label><input type="text" id="lu" required autocomplete="off" autocapitalize="off" inputmode="url" value="${esc(link ? link.url : '')}" placeholder="https://192.168.1.1">
    <label for="lg">Group (optional)</label><input type="text" id="lg" list="lgl" autocomplete="off" value="${esc(link ? link.group || '' : '')}" placeholder="Home network"><datalist id="lgl">${groups.map(g => `<option value="${esc(g)}">`).join('')}</datalist>
    <div class="bar">${link ? '<button class="btn danger" type="button" id="ld" style="flex:1;justify-content:center">Delete</button>' : '<button class="btn ghost" type="button" id="sx" style="flex:1;justify-content:center">Cancel</button>'}<button class="btn" style="flex:1;justify-content:center">Save</button></div><div class="err" id="le"></div></form>`);
  if (el.querySelector('#sx')) el.querySelector('#sx').onclick = closeSheet;
  if (link) el.querySelector('#ld').onclick = () => confirmSheet('Delete link?', link.title, 'Delete', () => { store.set('links', linkList().filter(l => l.id !== link.id)); viewLinks(); });
  el.querySelector('#lf').onsubmit = e => {
    e.preventDefault();
    const url = safeUrl(el.querySelector('#lu').value);
    if (!url) { el.querySelector('#le').textContent = 'That is not a web address (it must be http or https).'; return; }
    const next = { id: link ? link.id : 'l' + Date.now().toString(36) + Math.random().toString(36).slice(2, 6), title: el.querySelector('#lt').value.trim().slice(0, 60), url, group: el.querySelector('#lg').value.trim().slice(0, 40) };
    const rest = linkList();
    store.set('links', link ? rest.map(l => l.id === link.id ? next : l) : [...rest, next]);
    closeSheet(); viewLinks();
  };
}