const RT=(()=>{try{const el=document.getElementById('rt-config');return el?JSON.parse(el.textContent):{}}catch{return {}}})();

/* eslint-disable */
/* ═══════════ v5.13.0 Realtime — WS gateway, présence, curseurs, merge LWW ═══════════ */
window.__fdRT = (function () {
  const SELF = {
    id: RT.id,
    login: RT.login,
    full_name: RT.full_name,
    color: RT.color,
  };
  const COLORS = [
    "#2383E2", "#46A758", "#E5484D", "#F76B15", "#8E4EC6", "#12A594",
    "#FFC53D", "#D6409F", "#0091FF", "#3E63DD", "#30A46C", "#FF3333",
  ];
  let E = null;              // editorState (window.E)
  let ws = null;
  let mode = 'off';          // 'ws' | 'poll'
  let open = false;
  let base = [];             // dernier snapshot serveur des blocs
  let version = 0;
  let pendingOps = 0;
  let needSync = false;
  let peers = [];            // liste des présents (hors moi)
  let remoteCursors = {};    // userId -> {peer, block, offset}
  let myCursor = null;       // {block, offset}
  let emitT = null, selT = null, titleT = null, drawT = null, retryT = null, pollT = null;
  let _pid = 0;

  // Detach global listeners from a previous editor instance so that
  // partial (HTMX) navigation doesn't accumulate stale handlers.
  function unbindGlobal() {
    const g = window.__fdRTGlobal;
    if (!g) return;
    try {
      document.removeEventListener('selectionchange', g.onSel, true);
      window.removeEventListener('scroll', g.onScroll, true);
      window.removeEventListener('resize', g.onResize);
    } catch (e) { /* noop */ }
    window.__fdRTGlobal = null;
  }

  const clone = (o) => JSON.parse(JSON.stringify(o));

  function colorOf(uid) { return COLORS[Math.abs(uid || 0) % COLORS.length]; }

  function initials(p) {
    const n = (p && (p.full_name || p.login)) || '';
    const parts = String(n).trim().split(/\s+/);
    if (!parts[0]) return '?';
    return ((parts[0][0] || '') + (parts.length > 1 ? (parts[1][0] || '') : '')).toUpperCase().slice(0, 2);
  }

  function send(obj) {
    if (ws && ws.readyState === WebSocket.OPEN) {
      try { ws.send(JSON.stringify(obj)); } catch (e) { /* noop */ }
    }
  }

  /* ── ops miroir du serveur (apply_op/merge) ── */
  function applyOpJS(blocks, op) {
    const t = op && op.type;
    if (t === 'insert') {
      const blk = op.block || {};
      const id = blk.id || ('rb' + Date.now().toString(36));
      blk.id = id;
      if (typeof ensureBlockIds === 'function') ensureBlockIds([blk]);
      let idx = op.index != null ? op.index : blocks.length;
      idx = Math.max(0, Math.min(idx, blocks.length));
      return blocks.slice(0, idx).concat([blk]).concat(blocks.slice(idx));
    }
    if (t === 'update') {
      const nb = op.block || {};
      if (!nb.id) return blocks;
      return blocks.map(b => (b.id === nb.id ? nb : b));
    }
    if (t === 'delete') {
      const bid = op.id;
      return blocks.filter(b => b.id !== bid);
    }
    if (t === 'move') {
      const bid = op.id, idx = op.index || 0;
      const out = blocks.filter(b => b.id !== bid);
      const moved = blocks.find(b => b.id === bid);
      if (!moved) return blocks;
      const i2 = Math.max(0, Math.min(idx, out.length));
      out.splice(i2, 0, moved);
      return out;
    }
    return blocks;
  }

  /* Diff base → courants : update/delete/move/insert (ordre pour le serveur). */
  function diffOps(cur) {
    if (!base.length && !cur.length) return [];
    const ops = [];
    const baseById = {}, curById = {};
    base.forEach(b => { baseById[b.id] = b; });
    cur.forEach(b => { curById[b.id] = b; });

    cur.forEach(b => {
      if (baseById[b.id] !== undefined && JSON.stringify(baseById[b.id]) !== JSON.stringify(b)) {
        // v6.4.0 : on embarque la `base` dont dérive la saisie → le serveur
        // fait un merge 3-voix au lieu d'écraser le bloc (LWW).
        ops.push({ type: 'update', block: clone(b), base: clone(baseById[b.id]) });
      }
    });
    base.forEach(b => {
      if (curById[b.id] === undefined) ops.push({ type: 'delete', id: b.id });
    });

    // structure : simule l'état serveur (base − supprimés) pour indices valides
    let sim = base.filter(b => curById[b.id] !== undefined).map(b => clone(b));
    const simById = {}; sim.forEach(b => { simById[b.id] = b; });
    const finalOrder = cur.map(b => b.id);
    let si = 0;
    finalOrder.forEach(id => {
      if (simById[id] !== undefined) {
        const curPos = sim.findIndex(b => b.id === id);
        if (curPos !== si) ops.push({ type: 'move', id, index: si });
        const [mv] = sim.splice(curPos, 1);
        sim.splice(si, 0, mv);
        si++;
      } else {
        ops.push({ type: 'insert', index: si, block: clone(curById[id]) });
        sim.splice(si, 0, curById[id]);
        simById[id] = curById[id];
        si++;
      }
    });
    return ops;
  }

  /* ── rendu + présence ── */
  function activeBlockId() {
    const a = E && E.getActiveBlock ? E.getActiveBlock() : null;
    return a ? a.bid : null;
  }

  function refocus(fid) {
    if (!fid) return;
    setTimeout(() => {
      const el = E.getEl(fid);
      if (el) { el.focus(); try { (typeof ce === 'function') && ce(el); } catch (e) { /* noop */ } }
    }, 30);
  }

  function renderPresence() {
    let host = document.querySelector('.topbar-right.header-actions');
    if (!host) return;
    let box = document.getElementById('rtPresence');
    if (!box) {
      box = document.createElement('span');
      box.id = 'rtPresence';
      box.className = 'rt-presence';
      host.insertBefore(box, host.firstChild);
    }
    const shown = peers.filter(p => p.id !== (SELF.id || 0));
    if (!shown.length) { box.style.display = 'none'; return; }
    box.style.display = 'inline-flex';
    box.innerHTML = '';
    shown.forEach(p => {
      const c = document.createElement('span');
      c.className = 'rt-avatar';
      c.title = (p.full_name || p.login) + ' est en train d\u2019éditer' + (mode === 'poll' ? ' (polling)' : '');
      c.textContent = initials(p);
      c.style.background = p.color || colorOf(p.id);
      box.appendChild(c);
    });
    if (mode === 'poll') {
      let off = document.getElementById('rtOffline');
      if (!off) {
        off = document.createElement('span');
        off.id = 'rtOffline';
        off.className = 'rt-offline';
        off.textContent = '●';
        off.title = 'Realtime indisponible — rafraîchissement toutes les 10 s';
        host.insertBefore(off, box.nextSibling || null);
      }
      off.style.display = 'inline';
    }
  }

  /* ── curseurs ── */
  function rangeFromOffset(el, offset) {
    try {
      const walker = document.createTreeWalker(el, NodeFilter.SHOW_TEXT);
      let n = walker.nextNode(), count = 0;
      while (n) {
        const len = (n.nodeValue || '').length;
        if (count + len >= offset) {
          const r = document.createRange();
          r.setStart(n, Math.min(offset - count, len));
          r.collapse(true);
          return r;
        }
        count += len;
        n = walker.nextNode();
      }
      const r = document.createRange();
      r.selectNodeContents(el);
      r.collapse(false);
      return r;
    } catch (e) { return null; }
  }

  function drawCursors() {
    const layer = document.getElementById('rtCursors');
    if (!layer) return;
    layer.innerHTML = '';
    const ids = Object.keys(remoteCursors);
    if (!ids.length) return;
    ids.forEach(uid => {
      const c = remoteCursors[uid];
      if (!c || !c.block) return;
      const el = E.getEl(c.block);
      if (!el) return;
      const r = rangeFromOffset(el, c.offset || 0);
      let x, y, h;
      if (r) {
        const rc = r.getBoundingClientRect();
        if (!rc.width && !rc.height) return; // hors viewport positionné
        x = rc.left; y = rc.top; h = Math.max(rc.height, 16);
      } else {
        const rc = el.getBoundingClientRect();
        x = rc.left; y = rc.top; h = Math.max(rc.height, 16);
      }
      const m = document.createElement('div');
      m.className = 'rt-cursor';
      m.style.left = (x - 1) + 'px';
      m.style.top = (y - 1) + 'px';
      m.style.height = h + 'px';
      m.style.background = c.peer.color || colorOf(c.peer.id);
      const nm = document.createElement('span');
      nm.className = 'rt-cursor-name';
      nm.textContent = initials(c.peer);
      nm.style.background = m.style.background;
      m.appendChild(nm);
      layer.appendChild(m);
    });
  }

  function emitCursor() {
    const a = E && E.getActiveBlock ? E.getActiveBlock() : null;
    let block = null, offset = 0;
    if (a && a.el && a.bid) {
      block = a.bid;
      try { offset = (typeof cp === 'function') ? cp(a.el) : 0; } catch (e) { offset = 0; }
    }
    const changed = !myCursor || myCursor.block !== block || myCursor.offset !== offset;
    myCursor = { block, offset };
    if (!changed) return;
    send({ t: 'sel', block, offset });
  }

  function scheduleDraw() {
    clearTimeout(drawT);
    drawT = setTimeout(drawCursors, 40);
  }

  /* ── application des changements distants ── */
  function applySync(blocks, title) {
    if (!E || !E.blocks) return;
    // v5.13.1: guarantee ids before comparing/merging. Server rooms may still
    // carry legacy id-less blocks; without this they collide on
    // data-bid="undefined" and the merge below duplicated every line.
    blocks = (blocks || []).slice();
    if (typeof ensureBlockIds === 'function') ensureBlockIds(blocks);
    const curIds = JSON.stringify((E.blocks || []).map(b => b.id));
    const srvIds = JSON.stringify(blocks.map(b => b.id));
    if (curIds === srvIds) {
      base = clone(E.blocks);
      E.dirty = false;
      return;
    }
    const fid = activeBlockId();
    const curById = {};
    (E.blocks || []).forEach(b => { curById[b.id] = b; });
    let out;
    try {
      if (!blocks.length) {
        // serveur vide : ne pas effacer le contenu local (page neuve).
        out = (E.blocks || []).slice();
      } else {
        out = blocks.map(b => {
          const cb = curById[b.id];
          if (cb && b.id === fid) return cb; // garde la frappe locale en cours
          return b;
        });
      }
    } catch (e) { return; }
    E.blocks = out;
    const tEl = document.getElementById('_titleEl');
    if (title && title !== E.pageTitle && document.activeElement !== tEl) {
      tEl.textContent = title;
      E.pageTitle = title;
    }
    E.dirty = true;
    base = clone(E.blocks);
    E.render();
    refocus(fid);
    scheduleDraw();
  }

  function applyRemoteOp(op) {
    const fid = activeBlockId();
    if (op.type === 'update') {
      const nb = op.block || {};
      if (nb.id === fid) {
        // bloc en cours d'édition : on garde la valeur locale, le serveur a déjà
        // l'op ; la prochaine frappe locale repartira (LWW).
        base = applyOpJS(base, op);
        return;
      }
      E.blocks = applyOpJS(E.blocks, op);
      base = applyOpJS(base, op);
      E.dirty = true;
      E.render();
      refocus(fid);
    } else {
      E.blocks = applyOpJS(E.blocks, op);
      base = applyOpJS(base, op);
      E.dirty = true;
      E.render();
      refocus(fid);
    }
    scheduleDraw();
  }

  /* ── diffusion des modifications locales ── */
  function emit() {
    if (mode !== 'ws' || !open || !E || !E.blocks) return;
    if (needSync) { send({ t: 'sync_req' }); return; }
    const cur = E.blocks.filter(b => b && b.id);
    const ops = diffOps(cur);
    if (!ops.length) return;
    ops.forEach(op => { send({ t: 'op', op, v: version }); pendingOps++; });
    base = clone(cur);
  }

  function onMsg(m) {
    if (!m || !m.t) return;
    if (m.t === 'sync') {
      version = m.version || 0;
      base = clone(m.blocks || []);
      needSync = false;
      pendingOps = 0;
      if (typeof m.blocks === 'undefined') return;
      applySync(m.blocks || [], m.title || '');
    } else if (m.t === 'ack') {
      version = m.v || 0;
      if (pendingOps > 0) pendingOps--;
      // v6.4.0 : le serveur renvoie le bloc fusionné (merge 3-voix). On
      // l'adopte comme nouvelle base ; s'il diffère de notre saisie locale
      // c'est qu'un autre utilisateur avait modifié le même bloc.
      if (m.merged) {
        const mid = m.merged.id;
        const localBlock = (E && E.blocks || []).find(b => b.id === mid);
        const differs = localBlock && JSON.stringify(localBlock) !== JSON.stringify(m.merged);
        base = applyOpJS(base, { type: 'update', block: m.merged });
        if (differs && E) {
          const fid = activeBlockId();
          if (fid !== mid) {
            E.blocks = applyOpJS(E.blocks, { type: 'update', block: m.merged });
            E.dirty = true;
            E.render();
            refocus(fid);
          }
          if (m.conflict && window.showToast) {
            window.showToast('Editing conflict merged on a block', 'info');
          }
        }
      }
      if (m.stale || needSync) { needSync = true; send({ t: 'sync_req' }); }
    } else if (m.t === 'op') {
      if (m.v) version = m.v;
      if (m.from === (SELF.id || 0)) { base = applyOpJS(base, m.op); return; }
      applyRemoteOp(m.op);
    } else if (m.t === 'title') {
      const tEl = document.getElementById('_titleEl');
      if (m.from !== (SELF.id || 0) && tEl && document.activeElement !== tEl && E) {
        tEl.textContent = m.title || '';
        E.pageTitle = m.title || '';
      }
      if (m.v) version = m.v;
      scheduleDraw();
    } else if (m.t === 'sel') {
      if (m.from === (SELF.id || 0)) return;
      if (!m.block) { delete remoteCursors[m.from]; scheduleDraw(); return; }
      remoteCursors[m.from] = { peer: m.peer || { id: m.from }, block: m.block, offset: m.offset || 0 };
      scheduleDraw();
    } else if (m.t === 'welcome') {
      peers = (m.peers || []).filter(p => p.id !== (SELF.id || 0));
      renderPresence();
    } else if (m.t === 'peer_join') {
      if (m.peer && m.peer.id !== (SELF.id || 0)) {
        peers = peers.filter(p => p.id !== m.peer.id).concat([m.peer]);
        renderPresence();
      }
     } else if (m.t === 'peer_leave') {
       peers = peers.filter(p => p.id !== m.id);
       delete remoteCursors[m.id];
       renderPresence();
       scheduleDraw();
     } else if (m.t === 'synced_update') {
       // A synced block was updated — re-sync the whole page
       if (m.synced_id) {
         needSync = true;
         send({ t: 'sync_req' });
       }
     }
   }

  /* ── connexion WS + fallback polling ── */
  function startPolling() {
    if (pollT) return;
    mode = 'poll';
    renderPresence();
    scheduleDraw();
    pollT = setInterval(poll, 10000);
  }

  function stopPolling() {
    if (pollT) { clearInterval(pollT); pollT = null; }
    const off = document.getElementById('rtOffline');
    if (off) off.style.display = 'none';
  }

  async function poll() {
    if (!E || !_pid) return;
    try {
      const r = await fetch('/board/api/pages/' + _pid, { credentials: 'same-origin' });
      if (!r.ok) return;
      const d = await r.json();
      if ((d.content_format || 'blocks') !== 'blocks' || !d.content) return;
      const serverBlocks = JSON.parse(d.content);
      // en cas de modifs locales non persistées : on garde local (LWW au prochain save)
      if (E.dirty) return;
      const cur = JSON.stringify((E.blocks || []).map(b => b.id));
      const srv = JSON.stringify(serverBlocks.map(b => b.id));
      if (cur === srv) return;
      version = version; // pas de version via polling — on adopte l'état serveur
      applySync(serverBlocks, d.title || E.pageTitle);
    } catch (e) { /* noop */ }
  }

  function connect() {
    if (!E || !_pid || ws) return;
    const proto = window.location.protocol === 'https:' ? 'wss://' : 'ws://';
    try {
      ws = new WebSocket(proto + window.location.host + '/ws/pages/' + _pid);
    } catch (e) {
      startPolling();
      return;
    }
    ws.onopen = () => {
      open = true;
      mode = 'ws';
      stopPolling();
      send({ t: 'hello' });
    };
    ws.onmessage = (ev) => {
      let m;
      try { m = JSON.parse(ev.data); } catch (e) { return; }
      onMsg(m);
    };
    ws.onclose = () => {
      open = false;
      ws = null;
      if (retryT) clearTimeout(retryT);
      retryT = setTimeout(connect, 15000);
      startPolling();
    };
    ws.onerror = () => { try { ws.close(); } catch (e) { /* noop */ } };
    setTimeout(() => {
      if (!open) { try { ws && ws.close(); } catch (e) { /* noop */ } }
    }, 5000);
  }

  function titleInput() {
    const tEl = document.getElementById('_titleEl');
    if (!tEl) return;
    clearTimeout(titleT);
    titleT = setTimeout(() => {
      send({ t: 'title', title: (tEl.textContent || '').trim() });
    }, 500);
  }

  function wire() {
    const ct = document.getElementById('_blocksCt');
    if (ct) {
      ct.addEventListener('input', () => {
        clearTimeout(emitT);
        emitT = setTimeout(emit, 350);
        setTimeout(emitCursor, 80);
      }, true);
      ct.addEventListener('keyup', () => { clearTimeout(selT); selT = setTimeout(emitCursor, 120); }, true);
      ct.addEventListener('click', () => { clearTimeout(selT); selT = setTimeout(emitCursor, 120); }, true);
      ct.addEventListener('mouseup', () => { clearTimeout(selT); selT = setTimeout(emitCursor, 120); }, true);
    }
    const tEl = document.getElementById('_titleEl');
    if (tEl) tEl.addEventListener('input', titleInput);
    unbindGlobal();
    const onSel = () => { clearTimeout(selT); selT = setTimeout(emitCursor, 150); };
    const onScroll = () => scheduleDraw();
    const onResize = () => scheduleDraw();
    document.addEventListener('selectionchange', onSel, true);
    window.addEventListener('scroll', onScroll, true);
    window.addEventListener('resize', onResize);
    window.__fdRTGlobal = { onSel, onScroll, onResize };
  }

  function start(ed) {
    if (!ed) return;
    if ((ed.contentFormat || 'blocks') !== 'blocks') return;
    E = ed;
    _pid = ed.pid || 0;
    if (!_pid) return;
    base = clone(ed.blocks || []);
    wire();
    connect();
  }

  // poussée immédiate des ops après une mutation programmatique (v5.10.0)
  function syncNow() {
    if (mode !== 'ws' || !open || !E || !E.blocks) return;
    clearTimeout(emitT);
    emit();
  }

  return { start, syncNow };
})();