/*!
 * Tectum
 * Copyright © 2026 Machiel Heinen.
 * Alle rechten voorbehouden. Gebruik uitsluitend met schriftelijke toestemming.
 * Zie LICENTIE.md.
 */

window.Ribbon = (() => {
  const sources = {};
  const SOURCE_ORDER = ['app', 'editor'];
  let root = null, tabsEl = null, bodyEl = null;
  let activeKey = null, lastPlainKey = null;
  let auto = true;
  let collapsed = false, notified = null;
  const listeners = [];
  const PREF_KEY = 'tectum.ribbon.collapsed';

  const icon = (n) => `<i class="bi bi-${n}" aria-hidden="true"></i>`;
  const big = (label, iconName, attrs, cls) =>
    `<button type="button" class="rb-btn rb-big${cls ? ' ' + cls : ''}" ${attrs || ''}>${icon(iconName)}<span>${label}</span></button>`;
  const small = (label, iconName, attrs, cls) =>
    `<button type="button" class="rb-btn rb-small${cls ? ' ' + cls : ''}" ${attrs || ''}>${icon(iconName)}<span>${label}</span></button>`;
  const kv = (label, value, unit) =>
    `<div class="rb-kv"><span>${label}</span><b>${value}${unit ? `<small>${unit}</small>` : ''}</b></div>`;

  function allTabs() {
    const byKey = new Map();
    SOURCE_ORDER.concat(Object.keys(sources).filter(n => !SOURCE_ORDER.includes(n))).forEach(name => {
      (sources[name] || []).forEach(t => {
        if (!byKey.has(t.key)) byKey.set(t.key, { key: t.key, label: t.label, order: t.order || 0, contextual: !!t.contextual, icon: t.icon, parts: [] });
        const m = byKey.get(t.key);
        if (t.order !== undefined && name !== 'app') m.order = t.order;
        if (t.label && name !== 'app') m.label = t.label;
        if (t.contextual) m.contextual = true;
        m.parts.push(t);
      });
    });
    return Array.from(byKey.values()).sort((a, b) => (a.contextual - b.contextual) || (a.order - b.order));
  }

  function renderTabs(list) {
    tabsEl.innerHTML = list.map(t =>
      `<button type="button" class="rb-tab${t.key === activeKey ? ' active' : ''}${t.contextual ? ' rb-ctx' : ''}" data-rb-tab="${t.key}">${t.contextual && t.icon ? icon(t.icon) : ''}<span>${t.label}</span></button>`).join('');
  }

  function renderBody(list) {
    const tab = list.find(t => t.key === activeKey);
    if (!tab) { bodyEl.innerHTML = ''; return; }
    const groups = [];
    tab.parts.forEach(p => (p.groups ? p.groups() : []).forEach(g => g && groups.push(g)));
    bodyEl.innerHTML = groups.map(g =>
      `<section class="rb-group${g.cls ? ' ' + g.cls : ''}"><div class="rb-group-body">${g.html}</div><div class="rb-group-label">${g.label}</div></section>`).join('') +
      `<button type="button" class="rb-collapse" title="Ribbon inklappen (dubbelklik op een tabblad)">${icon('chevron-up')}</button>`;
    tab.parts.forEach(p => p.wire && p.wire(bodyEl));
  }

  function render() {
    if (!root) return;
    const list = allTabs();
    if (!list.some(t => t.key === activeKey) || (auto && !list.some(t => t.key === activeKey && t.contextual))) {
      const pick = [lastPlainKey, 'start'].find(k => list.some(t => t.key === k));
      activeKey = pick || (list.find(t => !t.contextual) || {}).key || null;
    }
    renderTabs(list);
    renderBody(list);
    root.classList.toggle('rb-collapsed', collapsed);
    if (notified !== activeKey) { notified = activeKey; listeners.forEach(fn => fn(activeKey)); }
  }

  function activate(key) {
    const list = allTabs();
    const tab = list.find(t => t.key === key);
    if (!tab) return;
    activeKey = key;
    auto = false;
    if (!tab.contextual) lastPlainKey = key;
    if (collapsed) { collapsed = false; savePref(); }
    render();
    tab.parts.forEach(p => p.onShow && p.onShow());
  }

  function savePref() { try { localStorage.setItem(PREF_KEY, collapsed ? '1' : '0'); } catch (e) { } }

  function init(el) {
    root = el;
    try { collapsed = localStorage.getItem(PREF_KEY) === '1'; } catch (e) { collapsed = false; }
    tabsEl = el.querySelector('.rb-tabs');
    bodyEl = el.querySelector('.rb-body');
    tabsEl.addEventListener('click', (e) => {
      const b = e.target.closest('[data-rb-tab]');
      if (!b) return;
      if (b.dataset.rbTab === activeKey && collapsed) { collapsed = false; savePref(); render(); return; }
      activate(b.dataset.rbTab);
    });
    tabsEl.addEventListener('dblclick', (e) => {
      if (!e.target.closest('[data-rb-tab]')) return;
      collapsed = !collapsed; savePref(); render();
    });
    bodyEl.addEventListener('click', (e) => {
      if (e.target.closest('.rb-collapse')) { collapsed = true; savePref(); render(); }
    });
    render();
  }

  function setSource(name, tabs, opts) {
    sources[name] = tabs || [];
    const ctx = (tabs || []).find(t => t.contextual);
    if (opts && opts.focus && ctx) { activeKey = ctx.key; if (collapsed) { collapsed = false; savePref(); } }
    render();
    if (opts && opts.focus && ctx && ctx.onShow) ctx.onShow();
  }

  function onChange(fn) { listeners.push(fn); return () => { const i = listeners.indexOf(fn); if (i >= 0) listeners.splice(i, 1); }; }

  return { init, setSource, activate, refresh: render, active: () => activeKey, onChange, big, small, kv };
})();