import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import '../../core/network/api_client.dart';
import '../../core/network/signalr_service.dart';
import '../../core/theme/app_theme.dart';
import '../../core/theme/theme_picker_dialog.dart';
import '../../features/auth/bloc/auth_bloc.dart';
import '../../features/auth/models/user_model.dart';
import '../../features/search/widgets/asset_search_dialog.dart';

/// Global System App Bar displaying current tab title, connection status LED, spotlight search, theme switcher, and profile menu.
class GlobalAppBar extends StatelessWidget implements PreferredSizeWidget {
  final UserModel user;
  final ApiClient apiClient;
  final SignalRService signalRService;
  final String currentTabTitle;

  const GlobalAppBar({
    super.key,
    required this.user,
    required this.apiClient,
    required this.signalRService,
    required this.currentTabTitle,
  });

  @override
  Size get preferredSize => const Size.fromHeight(kToolbarHeight);

  @override
  Widget build(BuildContext context) {
    final activeTheme = AppTheme.activePreset;

    return AppBar(
      backgroundColor: activeTheme.cardSurface,
      elevation: activeTheme.brightness == Brightness.dark ? 0 : 1,
      title: Row(
        children: [
          Icon(Icons.auto_graph_rounded, color: activeTheme.primaryColor, size: 26),
          const SizedBox(width: 10),
          Text('Finlytic Enterprise', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 18, color: activeTheme.textPrimary)),
          const SizedBox(width: 12),
          Text('•', style: TextStyle(color: activeTheme.textMuted, fontSize: 16)),
          const SizedBox(width: 12),
          Container(
            padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 4),
            decoration: BoxDecoration(
              color: activeTheme.glassSurface,
              borderRadius: BorderRadius.circular(activeTheme.borderRadius * 0.6),
              border: Border.all(color: activeTheme.glassBorder),
            ),
            child: Text(
              currentTabTitle,
              style: TextStyle(fontWeight: FontWeight.bold, fontSize: 13.5, color: activeTheme.accentColor),
            ),
          ),
          const SizedBox(width: 16),
          // Connection Status LED Indicator
          ListenableBuilder(
            listenable: signalRService,
            builder: (context, _) {
              final isOnline = signalRService.isConnected;
              final color = isOnline ? activeTheme.primaryColor : activeTheme.accentRed;
              return Container(
                padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                decoration: BoxDecoration(
                  color: color.withValues(alpha: 0.15),
                  borderRadius: BorderRadius.circular(12),
                  border: Border.all(color: color.withValues(alpha: 0.4)),
                ),
                child: Row(
                  children: [
                    Container(
                      width: 8,
                      height: 8,
                      decoration: BoxDecoration(
                        shape: BoxShape.circle,
                        color: color,
                      ),
                    ),
                    const SizedBox(width: 6),
                    Text(
                      isOnline ? 'Online' : 'Offline',
                      style: TextStyle(color: color, fontSize: 11, fontWeight: FontWeight.bold),
                    ),
                  ],
                ),
              );
            },
          ),
        ],
      ),
      actions: [
        IconButton(
          icon: Icon(Icons.palette_outlined, color: activeTheme.accentColor),
          tooltip: 'Design & Theme',
          onPressed: () {
            showDialog(
              context: context,
              builder: (_) => const ThemePickerDialog(),
            );
          },
        ),
        IconButton(
          icon: Icon(Icons.search, color: activeTheme.primaryColor),
          tooltip: 'Asset-Suche',
          onPressed: () {
            showDialog(
              context: context,
              builder: (_) => AssetSearchDialog(apiClient: apiClient),
            );
          },
        ),
        // User Profile Dropdown Menu
        PopupMenuButton<String>(
          offset: const Offset(0, 48),
          color: activeTheme.cardSurface,
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(activeTheme.borderRadius),
            side: BorderSide(color: activeTheme.glassBorder),
          ),
          child: Padding(
            padding: const EdgeInsets.symmetric(horizontal: 12),
            child: Row(
              children: [
                CircleAvatar(
                  radius: 16,
                  backgroundColor: activeTheme.primaryColor.withValues(alpha: 0.2),
                  child: Text(
                    user.email.isNotEmpty ? user.email[0].toUpperCase() : 'U',
                    style: TextStyle(color: activeTheme.primaryColor, fontWeight: FontWeight.bold, fontSize: 13),
                  ),
                ),
                const SizedBox(width: 8),
                Text(
                  user.fullName.isNotEmpty ? user.fullName : user.email,
                  style: TextStyle(fontWeight: FontWeight.bold, fontSize: 13, color: activeTheme.textPrimary),
                ),
                Icon(Icons.arrow_drop_down, color: activeTheme.textMuted),
              ],
            ),
          ),
          onSelected: (value) {
            if (value == 'logout') {
              context.read<AuthBloc>().add(LogoutRequested());
            } else if (value == 'theme') {
              showDialog(
                context: context,
                builder: (_) => const ThemePickerDialog(),
              );
            }
          },
          itemBuilder: (context) => [
            PopupMenuItem(
              enabled: false,
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(user.email, style: TextStyle(fontWeight: FontWeight.bold, color: activeTheme.textPrimary)),
                  Text('Rolle: ${user.role}', style: TextStyle(fontSize: 11, color: activeTheme.textMuted)),
                  Divider(color: activeTheme.glassBorder),
                ],
              ),
            ),
            const PopupMenuItem(
              value: 'theme',
              child: Row(children: [Icon(Icons.palette_outlined, size: 18), SizedBox(width: 8), Text('Design & Themes')]),
            ),
            PopupMenuItem(
              value: 'logout',
              child: Row(children: [Icon(Icons.logout, color: activeTheme.accentRed, size: 18), const SizedBox(width: 8), Text('Abmelden', style: TextStyle(color: activeTheme.accentRed))]),
            ),
          ],
        ),
      ],
    );
  }
}