/**
 * MainLayout
 * 
 * Hauptlayout der Anwendung mit Sidebar und Content-Bereich.
 * Enthält den FeatureProvider für das Multi-Tenant-System.
 */

import React, { useEffect, useState } from 'react';
import { Outlet, useLocation } from 'react-router-dom';
import { FeatureProvider, useFeatureStore } from '../stores/featureStore';
import { MandateNavigation } from '../components/Navigation/MandateNavigation';
import { UserSection } from '../components/Navigation/UserSection';
import { WorkspaceKeepAlive } from '../pages/views/workspace/WorkspaceKeepAlive';
import { CommcoachKeepAlive } from '../pages/views/commcoach/CommcoachKeepAlive';
import { GraphicalEditorKeepAlive } from '../pages/views/graphicalEditor/GraphicalEditorKeepAlive';
import { AdminLanguagesKeepAlive } from '../pages/admin/AdminLanguagesKeepAlive';
import styles from './MainLayout.module.css';

import { useLanguage } from '../providers/language/LanguageContext';

const _WORKSPACE_ROUTE_RE = /\/mandates\/[^/]+\/workspace\/[^/]+\/dashboard/;
const _COMMCOACH_ROUTE_RE = /\/mandates\/[^/]+\/commcoach\/[^/]+\/session/;
const _GE_EDITOR_ROUTE_RE = /\/mandates\/[^/]+\/graphicalEditor\/[^/]+\/editor/;
const _ADMIN_LANGUAGES_RE = /\/admin\/languages(?:$|\/)/;

// =============================================================================
// INNER LAYOUT (mit Zugriff auf Store)
// =============================================================================

const MainLayoutInner: React.FC = () => {
    const { t } = useLanguage();

  const { loadFeatures, initialized, loading, error } = useFeatureStore();
  const location = useLocation();
  const [isMobileSidebarOpen, setIsMobileSidebarOpen] = useState(false);
  const isWorkspaceKeepAliveVisible = _WORKSPACE_ROUTE_RE.test(location.pathname);
  const isCommcoachKeepAliveVisible = _COMMCOACH_ROUTE_RE.test(location.pathname);
  const isGEEditorKeepAliveVisible = _GE_EDITOR_ROUTE_RE.test(location.pathname);
  const isLanguagesKeepAliveVisible = _ADMIN_LANGUAGES_RE.test(location.pathname);
  const hideOutletShell = isWorkspaceKeepAliveVisible || isCommcoachKeepAliveVisible || isGEEditorKeepAliveVisible || isLanguagesKeepAliveVisible;
  
  // Features laden beim Mount
  useEffect(() => {
    if (!initialized && !loading) {
      loadFeatures();
    }
  }, [initialized, loading, loadFeatures]);

  useEffect(() => {
    setIsMobileSidebarOpen(false);
  }, [location.pathname]);

  useEffect(() => {
    const handleResize = () => {
      if (window.innerWidth > 1024) {
        setIsMobileSidebarOpen(false);
      }
    };

    window.addEventListener('resize', handleResize);
    return () => window.removeEventListener('resize', handleResize);
  }, []);
  
  return (
    <div className={styles.mainLayout}>
      {isMobileSidebarOpen && (
        <button
          className={styles.mobileBackdrop}
          onClick={() => setIsMobileSidebarOpen(false)}
          aria-label={t('Navigation schließen')}
        />
      )}

      {/* Sidebar */}
      <aside className={`${styles.sidebar} ${isMobileSidebarOpen ? styles.sidebarOpen : ''}`}>
        <div className={styles.logoContainer}>
          <img 
            src="/logos/poweron-logo.png" 
            alt="PowerOn" 
            className={styles.logoImage}
          />
        </div>
        
        <nav className={styles.navigation}>
          {loading && (
            <div className={styles.loadingNav}>
              {t('Lade Navigation…')}
            </div>
          )}
          
          {error && (
            <div className={styles.errorNav}>
              {t('Fehler')}: {error}
            </div>
          )}
          
          {initialized && !loading && (
            <MandateNavigation />
          )}
        </nav>
        
        {/* User-Bereich am unteren Rand */}
        <UserSection />
      </aside>
      
      {/* Content */}
      <main className={styles.content}>
        <div className={styles.mobileTopBar}>
          <button
            className={styles.mobileMenuButton}
            onClick={() => setIsMobileSidebarOpen(true)}
            aria-label={t('Navigation öffnen')}
          >
            ☰
          </button>
          <img
            src="/logos/poweron-logo.png"
            alt="PowerOn"
            className={styles.mobileLogo}
          />
        </div>

        <WorkspaceKeepAlive isVisible={isWorkspaceKeepAliveVisible} />
        <CommcoachKeepAlive isVisible={isCommcoachKeepAliveVisible} />
        <GraphicalEditorKeepAlive isVisible={isGEEditorKeepAliveVisible} />
        <AdminLanguagesKeepAlive isVisible={isLanguagesKeepAliveVisible} />

        <div
          className={styles.outletShell}
          style={{ display: hideOutletShell ? 'none' : undefined }}
        >
          <Outlet />
        </div>
      </main>
    </div>
  );
};

// =============================================================================
// MAIN LAYOUT (mit Provider)
// =============================================================================

export const MainLayout: React.FC = () => {
  return (
    <FeatureProvider>
      <MainLayoutInner />
    </FeatureProvider>
  );
};

export default MainLayout;