'use strict';
// Office: make, find and open documents, spreadsheets and presentations kept in Seafile (they open in OnlyOffice inside the app).
// Search, a filter by kind, sorting, pinned and recently opened documents, a saved copy of the list that shows at once, and upload by button or by dropping files.
const OFFICE_KINDS = {
  doc: { label: 'Documents', one: 'Document', color: '#3d6bf0', exts: ['docx', 'doc', 'odt', 'rtf'] },
  sheet: { label: 'Spreadsheets', one: 'Spreadsheet', color: '#2f9e6e', exts: ['xlsx', 'xls', 'ods', 'csv'] },
  slide: { label: 'Presentations', one: 'Presentation', color: '#e0742b', exts: ['pptx', 'ppt', 'odp'] },
};
const ofKind = n => Object.keys(OFFICE_KINDS).find(k => OFFICE_KINDS[k].exts.includes(ext(n))) || 'doc';
const ofIsDoc = n => EDIT_EXT.has(ext(n)) && ext(n) !== 'txt';
const ofState = { q: '', kind: 'all', sort: store.get('office_sort', 'mtime'), limit: 40, docs: [], loc: null };
const ofKey = loc => 'oc:' + (ME ? ME.id : '') + ':' + loc.repo + ':' + loc.dir;
const ofPins = () => { const p = store.get('office_pins', []); return Array.isArray(p) ? p : []; };
const ofId = (repo, path) => repo + '|' + path;
const ofPath = f => (f.parent_dir || '/').replace(/\/?$/, '/') + f.name;

function ofOpen(repo, path, name) {
  addRecent(repo, path, name);
  if (cfg.editor) location.hash = officeHash(repo, path); else window.open(`${cfg.seafile}/lib/${encodeURIComponent(repo)}/file${encP(path)}`, '_blank', 'noopener');
}
function ofIcon(name) { const k = OFFICE_KINDS[ofKind(name)]; return `<span class="ic ofic" style="background:${k.color}">${icon('doc')}<em>${esc(ext(name).slice(0, 4).toUpperCase())}</em></span>`; }

function viewOffice(args = []) {
  if (args[0] === 'doc') return viewEdit(args.slice(1), { fromOffice: true });
  const signed = !!sf.token();
  $('#view').innerHTML = `<div class="wrap" id="ofwrap"><div class="ptop"><h1>Office</h1><span class="pspace"></span>${signed ? `<button class="btn ghost" id="ofup">${icon('up')}Upload</button><input type="file" id="ofupf" multiple hidden accept=".docx,.doc,.odt,.rtf,.xlsx,.xls,.ods,.csv,.pptx,.ppt,.odp">` : ''}<a class="btn ghost" href="#/files">${icon('files')}All files</a></div>
    <div class="ocreate">${Object.entries(OFFICE_KINDS).map(([k, o]) => `<button class="octile" data-k="${k}" style="--c:${o.color}"><span class="ic" style="background:${o.color}">${icon('plus')}</span><span><b>New ${o.one.toLowerCase()}</b><small>${o.exts[0].toUpperCase()}</small></span></button>`).join('')}</div>
    ${cfg.editor ? '' : '<p class="sub" style="margin:8px 0 0">Editing inside the app is switched off on this server, so documents open in Seafile instead.</p>'}
    <p class="sub" id="olib" style="margin:12px 0 0">${signed ? 'Loading…' : 'Sign in to Files to create and open documents.'}</p>
    <div id="oflt" class="ofilters" hidden><input type="search" id="oq" placeholder="Search documents" autocomplete="off" aria-label="Search documents" value="${esc(ofState.q)}"><div class="sgrp" id="okinds" role="tablist" aria-label="Kind"></div><select id="osort" class="psel" aria-label="Sort"><option value="mtime">Newest first</option><option value="name">Name</option><option value="size">Largest first</option></select></div>
    <div id="odocs"></div>${signed ? '' : '<div class="bar"><a class="btn" href="#/files">Sign in</a></div>'}</div>`;
  $('#view').querySelectorAll('.octile').forEach(t => t.onclick = () => newOfficeDoc(OFFICE_KINDS[t.dataset.k].exts[0], OFFICE_KINDS[t.dataset.k].one.toLowerCase()));
  if (!signed) return;
  $('#ofup').onclick = () => $('#ofupf').click();
  $('#ofupf').onchange = e => { const files = [...e.target.files]; e.target.value = ''; if (files.length) ofUpload(files.map(file => ({ file, rel: '' }))); };
  const wrap = $('#ofwrap');
  wrap.ondragover = e => { if ([...(e.dataTransfer.types || [])].includes('Files')) { e.preventDefault(); wrap.classList.add('dropt'); } };
  wrap.ondragleave = e => { if (!wrap.contains(e.relatedTarget)) wrap.classList.remove('dropt'); };
  wrap.ondrop = async e => { e.preventDefault(); wrap.classList.remove('dropt'); const files = (await droppedFiles(e.dataTransfer)).filter(f => ofIsDoc(f.file.name)); if (files.length) ofUpload(files); else toast('Drop Word, Excel or PowerPoint files here'); };
  $('#oq').oninput = e => { ofState.q = e.target.value; ofState.limit = 40; ofDraw(); };
  $('#osort').value = ofState.sort; $('#osort').onchange = e => { ofState.sort = e.target.value; store.set('office_sort', ofState.sort); ofDraw(); };
  ofLoad();
}

async function ofUpload(entries) {
  const loc = ofState.loc || await officeLocation(true); if (!loc) return;
  await enqueueUploads(loc.repo, loc.dir, entries);
  const t = setInterval(() => { if (!upActive()) { clearInterval(t); if (location.hash.startsWith('#/office') && $('#odocs')) ofLoad(true); } }, 1200);
  setTimeout(() => clearInterval(t), 10 * 60e3);
}

async function ofLoad(quiet) {
  try {
    const loc = await officeLocation(false), el = $('#olib'); if (!el) return;
    if (!loc) {
      el.textContent = 'Choose where your documents are saved in Seafile.'; $('#odocs').innerHTML = '<div class="bar"><button class="btn" id="chl2">Choose location</button></div>';
      $('#chl2').onclick = () => chooseFolder('Save documents in…').then(l => { if (l) { store.set('office_loc', l); viewOffice(); } }); return;
    }
    ofState.loc = loc;
    el.innerHTML = `Saved in <b>${esc(locLabel(loc))}</b> · <a href="#" id="chl" style="color:var(--accent)">change</a>`;
    $('#chl').onclick = e => { e.preventDefault(); chooseFolder('Save documents in…', loc).then(l => { if (l) { store.set('office_loc', l); ofState.docs = []; viewOffice(); } }); };
    let saved = null; try { saved = JSON.parse(localStorage.getItem(ofKey(loc))); } catch {}
    if (!quiet && saved && saved.docs) { ofState.docs = saved.docs; ofDraw(); } else if (!quiet) ofDraw(true);
    const all = await sf.req(`/api2/repos/${encodeURIComponent(loc.repo)}/dir/?p=${encodeURIComponent(loc.dir)}&recursive=1`);
    if (!location.hash.startsWith('#/office') || !$('#odocs')) return;
    ofState.docs = all.filter(f => f.type === 'file' && ofIsDoc(f.name)).map(f => ({ name: f.name, parent_dir: f.parent_dir || '/', mtime: f.mtime, size: f.size || 0 }));
    try { localStorage.setItem(ofKey(loc), JSON.stringify({ t: Date.now(), docs: ofState.docs.slice(0, 400) })); } catch {}
    ofDraw();
  } catch (e) {
    const el = $('#olib'); if (!el) return;
    if (ofState.docs.length) { el.innerHTML += ` · <span class="err">${esc(navigator.onLine ? e.message : 'offline')} (showing the saved list)</span>`; ofDraw(); }
    else { el.innerHTML = `<span class="err">${esc(e.message)}</span> <a href="#" id="ofretry" style="color:var(--accent)">Try again</a>`; $('#ofretry').onclick = ev => { ev.preventDefault(); ofLoad(); }; }
  }
}

function ofDraw(skeleton) {
  const box = $('#odocs'), loc = ofState.loc; if (!box || !loc) return;
  $('#oflt').hidden = !ofState.docs.length;
  const pins = new Set(ofPins()), q = ofState.q.trim().toLowerCase(), counts = { all: ofState.docs.length };
  for (const k of Object.keys(OFFICE_KINDS)) counts[k] = ofState.docs.filter(d => ofKind(d.name) === k).length;
  $('#okinds').innerHTML = [['all', 'All']].concat(Object.entries(OFFICE_KINDS).map(([k, o]) => [k, o.label])).filter(([k]) => k === 'all' || counts[k]).map(([k, l]) => `<a href="#" role="tab" data-k="${k}" aria-selected="${k === ofState.kind}" class="${k === ofState.kind ? 'on' : ''}">${l}</a>`).join('');
  $('#okinds').querySelectorAll('a').forEach(a => a.onclick = e => { e.preventDefault(); ofState.kind = a.dataset.k; ofState.limit = 40; ofDraw(); });
  const cmp = { mtime: (a, b) => b.mtime - a.mtime, name: (a, b) => collator.compare(a.name, b.name), size: (a, b) => b.size - a.size }[ofState.sort] || ((a, b) => b.mtime - a.mtime);
  const match = d => (ofState.kind === 'all' || ofKind(d.name) === ofState.kind) && (!q || (d.name + ' ' + d.parent_dir).toLowerCase().includes(q));
  const list = ofState.docs.filter(match).sort(cmp), shown = list.slice(0, ofState.limit), pinned = shown.filter(d => pins.has(ofId(loc.repo, ofPath(d))));
  const recents = !q && ofState.kind === 'all' ? store.get('recents', []).filter(r => r.repo === loc.repo && ofIsDoc(r.name)).slice(0, 6) : [];
  const row = d => { const path = ofPath(d), on = pins.has(ofId(loc.repo, path)), i = shown.indexOf(d);
    return `<div class="row it orow"><button class="rmain" data-o="${i}">${ofIcon(d.name)}<span class="grow"><b>${esc(d.name)}</b><small>${esc((d.parent_dir === '/' ? '' : d.parent_dir.replace(/^\//, '') + ' · ') + fmtDate(d.mtime) + (d.size ? ' · ' + fmtSize(d.size) : ''))}</small></span></button>
      <button class="ibtn" data-pin="${i}" aria-label="${on ? 'Unpin' : 'Pin'} ${esc(d.name)}" title="${on ? 'Unpin' : 'Pin to the top'}" style="${on ? 'color:var(--accent)' : ''}">${icon(on ? 'check' : 'plus')}</button><button class="ibtn" data-m="${i}" aria-label="Actions for ${esc(d.name)}">${icon('more')}</button></div>`; };
  box.innerHTML = skeleton ? '<p class="empty">Loading your documents…</p>' : (recents.length ? `<h2>Recently opened</h2><div class="orecent">${recents.map((r, i) => `<button class="octile rc" data-r="${i}" style="--c:${OFFICE_KINDS[ofKind(r.name)].color}">${ofIcon(r.name)}<span><b>${esc(r.name)}</b><small>${esc(new Date(r.t).toLocaleDateString([], { month: 'short', day: 'numeric' }))}</small></span></button>`).join('')}</div>` : '')
    + (pinned.length && !q ? `<h2>Pinned</h2><div class="list">${pinned.map(row).join('')}</div>` : '')
    + (list.length ? `<h2>${q ? 'Results' : ofState.kind === 'all' ? 'All documents' : OFFICE_KINDS[ofState.kind].label} <small style="color:var(--muted);font-weight:400">${list.length}</small></h2><div class="list">${shown.map(row).join('')}</div>${list.length > shown.length ? `<div class="bar" style="justify-content:center"><button class="btn ghost" id="ofmore">Show ${Math.min(40, list.length - shown.length)} more (${list.length - shown.length} not shown)</button></div>` : ''}`
      : `<p class="empty">${ofState.docs.length ? 'Nothing matches.' : 'No documents here yet. Create one above, or drop files on this page.'}</p>`);
  box.querySelectorAll('[data-o]').forEach(b => b.onclick = () => { const d = shown[+b.dataset.o]; if (d) ofOpen(loc.repo, ofPath(d), d.name); });
  box.querySelectorAll('[data-m]').forEach(b => b.onclick = () => { const d = shown[+b.dataset.m]; if (d) fileSheet(loc.repo, ofPath(d), d.name, d.parent_dir === '/' ? '/' : d.parent_dir.replace(/\/$/, '')); });
  box.querySelectorAll('[data-pin]').forEach(b => b.onclick = () => { const d = shown[+b.dataset.pin]; if (!d) return; const id = ofId(loc.repo, ofPath(d)), cur = ofPins(); store.set('office_pins', cur.includes(id) ? cur.filter(x => x !== id) : [id, ...cur].slice(0, 50)); ofDraw(); });
  box.querySelectorAll('[data-r]').forEach(b => b.onclick = () => { const r = recents[+b.dataset.r]; if (r) ofOpen(r.repo, r.path, r.name); });
  const more = $('#ofmore'); if (more) more.onclick = () => { ofState.limit += 40; ofDraw(); };
}