/*!
 * Tectum
 * Copyright © 2026 Machiel Heinen.
 * Alle rechten voorbehouden. Gebruik uitsluitend met schriftelijke toestemming.
 * Zie LICENTIE.md.
 */
const APP_VERSION = '0.4.9';
// 0.0.X per kleine iteratie, 0.X.0 per mijlpaal, X.0.0 bij live-gang.

let tabs = [];
let activeTabId = null;
let tabIdCounter = 1;
let kindCounters = {};
let currentEditor = null;

function editorModuleFor(kind) {
  if (kind === 'muur') return window.WallEditor;
  if (kind === 'vloer') return window.FloorEditor;
  if (kind === 'woning') return window.HouseEditor;
  return null;
}

function defaultNameFor(kind) {
  kindCounters[kind] = (kindCounters[kind] || 0) + 1;
  return `${kind} ${String(kindCounters[kind]).padStart(2, '0')}`;
}

function setWorkspaceEmpty() {
  document.getElementById('workspace').innerHTML = `<div id="workspace-empty">
    <div>Geen ontwerp geopend.</div>
    <div style="font-size:11px;">Bestand &rarr; Nieuw &rarr; kies een objecttype</div>
  </div>`;
}

function updateEditMenuState() {
  const has = (fn) => !!(currentEditor && typeof currentEditor[fn] === 'function');
  document.getElementById('menu-opslaan-als').classList.toggle('disabled', !has('exportDesign'));
  document.getElementById('menu-importeren').classList.toggle('disabled', !has('triggerImport'));
  document.getElementById('menu-mirror-h').classList.toggle('disabled', !has('mirrorHorizontal'));
  document.getElementById('menu-3d-fullscreen').classList.toggle('disabled', !has('toggleFullscreen3D'));
  document.getElementById('menu-2d-fullscreen').classList.toggle('disabled', !has('toggleFullscreen2D'));
  document.getElementById('menu-project-props').classList.toggle('disabled', !has('openProjectProperties'));
}

function renderTabBar() {
  const bar = document.getElementById('tab-bar');
  bar.innerHTML = tabs.map(tab => `
    <div class="tab-item ${tab.id === activeTabId ? 'active' : ''}" data-tab-id="${tab.id}">
      <span class="tab-name">${tab.name}</span>
      <span class="tab-close" data-close-id="${tab.id}">&times;</span>
    </div>
  `).join('');
}

function onTabSaved(tab, filenameWithExt) {
  const base = filenameWithExt.replace(/\.json$/i, '');
  tab.name = base;
  tab.savedName = base;
  renderTabBar();
}

function mountEditorForTab(tab) {
  const ws = document.getElementById('workspace');
  ws.innerHTML = '';
  currentEditor = editorModuleFor(tab.kind).mount(ws, { onSaved: (filename) => onTabSaved(tab, filename), template: tab.template, cameraKey: 'tab' + tab.id });
  if (tab.stateJson && typeof currentEditor.loadStateJson === 'function') {
    currentEditor.loadStateJson(tab.stateJson);
  }
}

function switchToTab(tabId) {
  if (activeTabId === tabId) return;
  const oldTab = tabs.find(t => t.id === activeTabId);
  if (oldTab && currentEditor && typeof currentEditor.getStateJson === 'function') {
    oldTab.stateJson = currentEditor.getStateJson();
  }
  if (currentEditor && typeof currentEditor.unmount === 'function') currentEditor.unmount();
  currentEditor = null;

  activeTabId = tabId;
  mountEditorForTab(tabs.find(t => t.id === tabId));
  updateEditMenuState();
  renderTabBar();
}

function openNew(kind, template) {
  if (!editorModuleFor(kind)) { closeAllMenus(); return; } // 'dak' nog niet beschikbaar

  const oldTab = tabs.find(t => t.id === activeTabId);
  if (oldTab && currentEditor && typeof currentEditor.getStateJson === 'function') {
    oldTab.stateJson = currentEditor.getStateJson();
  }
  if (currentEditor && typeof currentEditor.unmount === 'function') currentEditor.unmount();
  currentEditor = null;

  const tab = { id: tabIdCounter++, kind, template: template || null, name: defaultNameFor(kind), savedName: null, stateJson: null };
  tabs.push(tab);
  activeTabId = tab.id;
  mountEditorForTab(tab);
  updateEditMenuState();
  renderTabBar();
  closeAllMenus();
}

function isTabDirty(tab) {
  const module = editorModuleFor(tab.kind);
  if (!module || typeof module.getDefaultState !== 'function') return false;
  const state = (tab.id === activeTabId && currentEditor && typeof currentEditor.getStateJson === 'function')
    ? currentEditor.getStateJson()
    : tab.stateJson;
  if (!state) return false;
  return JSON.stringify(state) !== JSON.stringify(module.getDefaultState(tab.template));
}

function closeTab(tabId) {
  const tab = tabs.find(t => t.id === tabId);
  if (!tab) return;

  if (tab.id !== activeTabId) {
    if (!isTabDirty(tab)) {
      tabs = tabs.filter(t => t.id !== tabId);
      renderTabBar();
      return;
    }
    switchToTab(tabId);
  }

  if (isTabDirty(tab) && currentEditor && typeof currentEditor.exportDesign === 'function') {
    const saved = currentEditor.exportDesign();
    if (!saved) return;
  }

  tabs = tabs.filter(t => t.id !== tabId);
  if (currentEditor && typeof currentEditor.unmount === 'function') currentEditor.unmount();
  currentEditor = null;
  activeTabId = null;

  if (tabs.length > 0) {
    switchToTab(tabs[tabs.length - 1].id);
  } else {
    setWorkspaceEmpty();
    updateEditMenuState();
    renderTabBar();
  }
}

function wireTabBar() {
  document.getElementById('tab-bar').addEventListener('click', (e) => {
    const closeBtn = e.target.closest('.tab-close');
    if (closeBtn) { closeTab(parseInt(closeBtn.dataset.closeId, 10)); return; }
    const item = e.target.closest('.tab-item');
    if (item) switchToTab(parseInt(item.dataset.tabId, 10));
  });
}

function closeAllMenus() {
  document.querySelectorAll('.menu-dropdown, .submenu').forEach(el => el.classList.remove('open'));
  document.querySelectorAll('.menu-btn').forEach(el => el.classList.remove('open'));
}

function wireTopLevelMenu(btnId, dropdownId) {
  const btn = document.getElementById(btnId);
  const dropdown = document.getElementById(dropdownId);
  btn.addEventListener('click', (e) => {
    e.stopPropagation();
    const willOpen = !dropdown.classList.contains('open');
    closeAllMenus();
    if (willOpen) { dropdown.classList.add('open'); btn.classList.add('open'); }
  });
}

function wireMenu() {
  wireTopLevelMenu('menu-bestand-btn', 'menu-bestand-dropdown');
  wireTopLevelMenu('menu-bewerken-btn', 'menu-bewerken-dropdown');
  wireTopLevelMenu('menu-beeld-btn', 'menu-beeld-dropdown');

  document.getElementById('menu-nieuw-item').addEventListener('click', (e) => e.stopPropagation());
  document.querySelectorAll('.menu-nieuw-option').forEach(opt => {
    opt.addEventListener('click', () => openNew(opt.dataset.kind, opt.dataset.template));
  });

  document.getElementById('menu-opslaan-als').addEventListener('click', () => {
    if (currentEditor && typeof currentEditor.exportDesign === 'function') currentEditor.exportDesign();
    closeAllMenus();
  });
  document.getElementById('menu-importeren').addEventListener('click', () => {
    if (currentEditor && typeof currentEditor.triggerImport === 'function') currentEditor.triggerImport();
    closeAllMenus();
  });
  document.getElementById('menu-mirror-h').addEventListener('click', () => {
    if (currentEditor && typeof currentEditor.mirrorHorizontal === 'function') currentEditor.mirrorHorizontal();
    closeAllMenus();
  });
  document.getElementById('menu-fullscreen').addEventListener('click', () => {
    toggleBrowserFullscreen();
    closeAllMenus();
  });
  document.getElementById('menu-3d-fullscreen').addEventListener('click', () => {
    if (currentEditor && typeof currentEditor.toggleFullscreen3D === 'function') currentEditor.toggleFullscreen3D();
    closeAllMenus();
  });
  document.getElementById('menu-2d-fullscreen').addEventListener('click', () => {
    if (currentEditor && typeof currentEditor.toggleFullscreen2D === 'function') currentEditor.toggleFullscreen2D();
    closeAllMenus();
  });
  document.getElementById('menu-project-props').addEventListener('click', () => {
    if (currentEditor && typeof currentEditor.openProjectProperties === 'function') currentEditor.openProjectProperties();
    closeAllMenus();
  });

  document.addEventListener('click', closeAllMenus);
}

// Minimale markdown-weergave voor de licentietekst (koppen + alinea's).
function renderLicenseHtml(md) {
  const esc = (t) => t.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
  return md.trim().split(/\n\s*\n/).map(block => {
    const b = block.trim();
    if (b.startsWith('## ')) return `<h4>${esc(b.slice(3))}</h4>`;
    if (b.startsWith('# ')) return `<h3>${esc(b.slice(2))}</h3>`;
    return `<p>${esc(b.replace(/\s*\n\s*/g, ' '))}</p>`;
  }).join('');
}

function wireAbout() {
  const overlay = document.getElementById('about-overlay');
  document.getElementById('about-license').innerHTML = renderLicenseHtml(window.TECTUM_LICENSE_MD || '');
  document.getElementById('btn-about').addEventListener('click', (e) => {
    e.stopPropagation();
    overlay.classList.add('open');
  });
  document.getElementById('about-close').addEventListener('click', () => overlay.classList.remove('open'));
  overlay.addEventListener('click', (e) => { if (e.target === overlay) overlay.classList.remove('open'); });
}

function wireNewModal() {
  const overlay = document.getElementById('new-overlay');
  overlay.addEventListener('click', (e) => { if (e.target === overlay) overlay.classList.remove('open'); });
  document.querySelectorAll('.new-option:not(.disabled)').forEach(opt => {
    opt.addEventListener('click', () => {
      openNew(opt.dataset.kind, opt.dataset.template);
      overlay.classList.remove('open');
    });
  });
}

function openNewModal() {
  closeAllMenus();
  document.getElementById('new-overlay').classList.add('open');
}

function toggleBrowserFullscreen() {
  if (document.fullscreenElement) document.exitFullscreen();
  else document.documentElement.requestFullscreen();
}

function wireHotkeys() {
  document.addEventListener('keydown', (e) => {
    const inField = ['INPUT', 'SELECT', 'TEXTAREA'].includes(document.activeElement.tagName);

    if (e.ctrlKey && e.key.toLowerCase() === 's') {
      e.preventDefault();
      if (currentEditor && typeof currentEditor.exportDesign === 'function') currentEditor.exportDesign();
      return;
    }
    if (e.ctrlKey && e.key.toLowerCase() === 'n') {
      e.preventDefault();
      openNewModal();
      return;
    }
    if (inField || e.ctrlKey || e.metaKey || e.altKey) return;

    if (e.key.toLowerCase() === 'f') {
      toggleBrowserFullscreen();
    } else if (e.key.toLowerCase() === 'h') {
      if (currentEditor && typeof currentEditor.mirrorHorizontal === 'function') currentEditor.mirrorHorizontal();
    } else if (e.key.toLowerCase() === 't') {
      if (currentEditor && typeof currentEditor.toggleFullscreen3D === 'function') currentEditor.toggleFullscreen3D();
    } else if (e.key.toLowerCase() === 'r') {
      if (currentEditor && typeof currentEditor.toggleFullscreen2D === 'function') currentEditor.toggleFullscreen2D();
    }
  });
}

document.addEventListener('DOMContentLoaded', () => {
  document.querySelectorAll('.app-version-slot').forEach(el => { el.textContent = 'v' + APP_VERSION; });
  document.querySelectorAll('.app-version-number').forEach(el => { el.textContent = APP_VERSION; });
  wireMenu();
  wireAbout();
  wireNewModal();
  wireHotkeys();
  wireTabBar();
  // Tectum draait via een webserver (texturen, lucht); file:// werkt niet volledig.
  if (location.protocol === 'file:') {
    const note = document.createElement('div');
    note.className = 'ui-warn file-protocol-warning';
    note.innerHTML = '<i class="bi bi-exclamation-triangle"></i><span>Tectum is geopend als bestand. Start het via een webserver: <code>./start.sh</code> of <code>python3 -m http.server</code>, en open <code>http://localhost:8000</code>. De omgeving (Dag/Nacht) werkt anders niet.</span>';
    document.body.appendChild(note);
  }
  openNew('woning', 'L');

  setTimeout(() => {
    const splash = document.getElementById('splash-screen');
    if (splash) splash.remove();
  }, 4300);
});