/**
 * FeatureView Page
 * 
 * Generische Feature-View-Komponente.
 * Rendert den entsprechenden Content basierend auf Feature-Code und View.
 */

import React from 'react';
import { useCurrentInstance } from '../hooks/useCurrentInstance';
import { useCanViewFeatureView } from '../hooks/useInstancePermissions';
import { useLanguage } from '../providers/language/LanguageContext';
import { getLabel, FEATURE_REGISTRY } from '../types/mandate';

// Trustee Views
// Note: TrusteeOrganisationsView and TrusteeContractsView removed - Feature-Instanz = Organisation
import { TrusteeDocumentsView } from './views/trustee/TrusteeDocumentsView';
import { TrusteePositionsView } from './views/trustee/TrusteePositionsView';
import { TrusteeDashboardView } from './views/trustee/TrusteeDashboardView';
import { TrusteeInstanceRolesView } from './views/trustee/TrusteeInstanceRolesView';
import { TrusteeExpenseImportView } from './views/trustee/TrusteeExpenseImportView';
import { TrusteeScanUploadView } from './views/trustee/TrusteeScanUploadView';
import { TrusteeAccountingSettingsView } from './views/trustee/TrusteeAccountingSettingsView';

// Chatbot Views
import { ChatbotConversationsView } from './views/chatbot/ChatbotConversationsView';

// RealEstate Views
import { RealEstatePekView, RealEstateInstanceRolesPlaceholder } from './views/realestate';

// Automation Views
import { AutomationDefinitionsView, AutomationTemplatesView, AutomationLogsView } from './views/automation';

// Workspace Views
import { WorkspacePage } from './views/workspace/WorkspacePage';
import { WorkspaceEditorPage } from './views/workspace/WorkspaceEditorPage';
import { WorkspaceSettingsPage } from './views/workspace/WorkspaceSettingsPage';

// Teamsbot Views
import { TeamsbotDashboardView } from './views/teamsbot/TeamsbotDashboardView';
import { TeamsbotSessionView } from './views/teamsbot/TeamsbotSessionView';
import { TeamsbotSettingsView } from './views/teamsbot/TeamsbotSettingsView';

// Neutralization Views
import { NeutralizationView } from './views/neutralization';

// CommCoach Views
import { CommcoachDashboardView, CommcoachDossierView, CommcoachSettingsView } from './views/commcoach';

import styles from './FeatureView.module.css';

// =============================================================================
// PLACEHOLDER VIEWS (für nicht implementierte Features)
// =============================================================================

const PlaceholderView: React.FC<{ title: string; description: string }> = ({ title, description }) => (
  <div className={styles.placeholder}>
    <h2>{title}</h2>
    <p>{description}</p>
  </div>
);

// Chatworkflow Views
const ChatworkflowDashboard: React.FC = () => (
  <PlaceholderView title="Workflow Dashboard" description="Übersicht der Workflows" />
);

const ChatworkflowRuns: React.FC = () => (
  <PlaceholderView title="Runs" description="Workflow-Ausführungen" />
);

const ChatworkflowFiles: React.FC = () => (
  <PlaceholderView title="Dateien" description="Workflow-Dateien" />
);

// Chatbot Views
// ChatbotConversationsView is imported above

const ChatbotSettings: React.FC = () => (
  <PlaceholderView title="Chatbot Einstellungen" description="Konfiguration des Chatbots" />
);

// Generic/Fallback
const NotFound: React.FC = () => (
  <div className={styles.notFound}>
    <h2>Seite nicht gefunden</h2>
    <p>Diese View existiert nicht oder wurde noch nicht implementiert.</p>
  </div>
);

const AccessDenied: React.FC = () => (
  <div className={styles.accessDenied}>
    <h2>Zugriff verweigert</h2>
    <p>Du hast keine Berechtigung für diese Ansicht.</p>
  </div>
);

// =============================================================================
// VIEW REGISTRY
// =============================================================================

type ViewComponent = React.FC;

const VIEW_COMPONENTS: Record<string, Record<string, ViewComponent>> = {
  trustee: {
    dashboard: TrusteeDashboardView,
    documents: TrusteeDocumentsView,
    positions: TrusteePositionsView,
    'instance-roles': TrusteeInstanceRolesView,
    'expense-import': TrusteeExpenseImportView,
    'scan-upload': TrusteeScanUploadView,
    settings: TrusteeAccountingSettingsView,
  },
  chatworkflow: {
    dashboard: ChatworkflowDashboard,
    runs: ChatworkflowRuns,
    files: ChatworkflowFiles,
  },
  chatbot: {
    conversations: ChatbotConversationsView,
    settings: ChatbotSettings,
  },
  realestate: {
    dashboard: RealEstatePekView,
    'instance-roles': RealEstateInstanceRolesPlaceholder,
  },
  automation: {
    definitions: AutomationDefinitionsView,
    templates: AutomationTemplatesView,
    logs: AutomationLogsView,
  },
  workspace: {
    dashboard: WorkspacePage,
    editor: WorkspaceEditorPage,
    settings: WorkspaceSettingsPage,
  },
  teamsbot: {
    dashboard: TeamsbotDashboardView,
    sessions: TeamsbotSessionView,
    settings: TeamsbotSettingsView,
  },
  neutralization: {
    dashboard: NeutralizationView,
    playground: NeutralizationView,
  },
  commcoach: {
    dashboard: CommcoachDashboardView,
    coaching: CommcoachDossierView,
    dossier: CommcoachDossierView,
    settings: CommcoachSettingsView,
  },
};

// =============================================================================
// FEATURE VIEW PAGE
// =============================================================================

interface FeatureViewPageProps {
  view: string;
}

export const FeatureViewPage: React.FC<FeatureViewPageProps> = ({ view }) => {
  const { instance, featureCode, isValid } = useCurrentInstance();
  const { currentLanguage } = useLanguage();
  
  // Berechtigungs-Check
  const viewCode = `${featureCode}-${view}`;
  const canView = useCanViewFeatureView(viewCode);
  
  // DEBUG: Log permission check for chatbot
  if (featureCode === 'chatbot') {
    console.log('🔍 [DEBUG] FeatureView Permission Check:', {
      featureCode,
      view,
      viewCode,
      instanceId: instance?.id,
      instanceLabel: instance?.instanceLabel,
      isValid,
      canView,
      permissions: instance?.permissions,
      views: instance?.permissions?.views,
      viewKeys: instance?.permissions?.views ? Object.keys(instance.permissions.views) : [],
      hasLegacyView: instance?.permissions?.views?.[viewCode],
      hasFullObjectKey: instance?.permissions?.views?.[`ui.feature.${featureCode}.${view}`],
      hasWildcard: instance?.permissions?.views?.['_all'],
    });
  }
  
  // Nicht valider Kontext
  if (!isValid || !featureCode || !instance) {
    return <NotFound />;
  }
  
  // Keine Berechtigung
  if (!canView && view !== 'not-found') {
    return <AccessDenied />;
  }
  
  // Workspace dashboard is rendered persistently by WorkspaceKeepAlive at MainLayout level;
  // other workspace views (e.g. settings, editor) use the standard FeatureViewPage rendering.
  if (featureCode === 'workspace' && view !== 'settings' && view !== 'editor') {
    return null;
  }

  // View-Komponente finden
  const featureViews = VIEW_COMPONENTS[featureCode];
  if (!featureViews) {
    return <NotFound />;
  }
  
  const ViewComponent = featureViews[view];
  if (!ViewComponent) {
    return <NotFound />;
  }
  
  // View-Info aus Registry
  const featureConfig = FEATURE_REGISTRY[featureCode];
  const viewConfig = featureConfig?.views?.find(v => v.code === view);
  const lang = (currentLanguage?.slice(0, 2) || 'de') as 'de' | 'en' | 'fr';
  const viewLabel = viewConfig ? getLabel(viewConfig.label, lang) : view;
  
  return (
    <div className={styles.featureView}>
      <header className={styles.viewHeader}>
        <h1 className={styles.viewTitle}>{viewLabel}</h1>
      </header>
      <main className={styles.viewContent}>
        <ViewComponent />
      </main>
    </div>
  );
};

export default FeatureViewPage;