/**
 * Adds a macOS-style traffic-light title bar to the top of the page content.
 * Three cases, in priority order:
 *  1. The Dashboard — DashboardTakeover.php renders it into a separate
 *     #aurora-admin-dashboard-root sibling, above #wpbody (which it hides),
 *     to fully replace the native dashboard. Gets wrapped in a new
 *     .aurora-dashboard-frame div to match the card treatment
 *     #wpbody-content already has everywhere else.
 *  2. The block editor — gets only the traffic-light controls, overlaid on
 *     the editor frame without a full-width titlebar surface.
 *  3. Everything else — native WP pages and all of Aurora's own Vue pages,
 *     since each mounts its root div inside #wpbody-content. The bar is
 *     inserted as its first child.
 *
 * Red closes (navigates back to the Aurora dashboard). Yellow minimizes —
 * on any page other than the dashboard, that means "save where I am and
 * send me home", with SiteShell.vue's taskbar offering a way back; on the
 * dashboard itself (already home) it just collapses in place instead,
 * since there's nowhere further back to send it. Green hides Aurora's own
 * sidebar/toolbar so the content fills the browser window. Minimized pages
 * are tracked as a list (taskbar.js), not a single slot, so minimizing
 * more than one shows up as separate taskbar items rather than the latest
 * silently replacing the previous one.
 */
import { addMinimizedWindow, currentPageTitle } from './taskbar.js';

function buildBar(adminUrl, isDashboard) {
  const bar = document.createElement('div');
  bar.className = 'aurora-winbar';

  const makeDot = (variant, label, onClick) => {
    const dot = document.createElement('button');
    dot.type = 'button';
    dot.className = 'aurora-winbar__dot aurora-winbar__dot--' + variant;
    dot.setAttribute('aria-label', label);
    dot.title = label;
    dot.addEventListener('click', onClick);
    return dot;
  };

  const root = document.documentElement;

  bar.appendChild(
    makeDot('close', 'Close', () => {
      window.location.href = adminUrl || '/wp-admin/';
    })
  );
  bar.appendChild(
    makeDot('minimize', 'Minimize', () => {
      if (isDashboard) {
        root.classList.toggle('aurora-minimized');
        root.classList.remove('aurora-maximized');
      } else {
        addMinimizedWindow(currentPageTitle(), window.location.href);
        window.location.href = adminUrl || '/wp-admin/';
      }
    })
  );
  bar.appendChild(
    makeDot('maximize', 'Maximize', () => {
      root.classList.toggle('aurora-maximized');
      root.classList.remove('aurora-minimized');
    })
  );

  return bar;
}

function isBlockEditorPage() {
  const path = window.location.pathname;
  return (
    document.body.classList.contains('block-editor-page') ||
    path.endsWith('/post-new.php') ||
    path.endsWith('/post.php')
  );
}

export function initWindowChrome(adminUrl) {
  if (document.querySelector('.aurora-winbar')) {
    return;
  }

  const dashboardRoot = document.getElementById('aurora-admin-dashboard-root');
  if (dashboardRoot) {
    const bar = buildBar(adminUrl, true);
    const frame = document.createElement('div');
    frame.className = 'aurora-dashboard-frame';
    dashboardRoot.parentNode.insertBefore(frame, dashboardRoot);
    frame.appendChild(bar);
    // Custom admin notices (Notices::render_for_dashboard(), printed as a
    // sibling right before the mount point) — reparented into the frame
    // here too, so they render as part of the dashboard's own card
    // instead of sitting outside it unstyled. Normally these reach the
    // user via the plain admin_notices hook, but that renders inside
    // #wpbody, which the Dashboard hides entirely to hide the *native*
    // dashboard widgets — this is the replacement path for that one page.
    const notices = document.getElementById('aurora-admin-dashboard-notices');
    if (notices) frame.appendChild(notices);
    frame.appendChild(dashboardRoot);
    return;
  }

  if (isBlockEditorPage()) {
    const bar = buildBar(adminUrl, false);
    bar.classList.add('aurora-winbar--editor');
    document.body.appendChild(bar);
    return;
  }

  const wpbodyContent = document.getElementById('wpbody-content');
  if (wpbodyContent) {
    const bar = buildBar(adminUrl, false);
    wpbodyContent.insertBefore(bar, wpbodyContent.firstChild);
  }
}