SIB/old/lib/widgets/custom_app_bar.dart

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

/// Custom app bar implementing clean, minimal header design
/// with contextual actions for the transit app
class CustomAppBar extends StatelessWidget implements PreferredSizeWidget {
  final String title;
  final List<Widget>? actions;
  final Widget? leading;
  final bool showBackButton;
  final VoidCallback? onBackPressed;
  final Color? backgroundColor;
  final Color? foregroundColor;
  final double elevation;
  final bool centerTitle;

  const CustomAppBar({
    super.key,
    required this.title,
    this.actions,
    this.leading,
    this.showBackButton = true,
    this.onBackPressed,
    this.backgroundColor,
    this.foregroundColor,
    this.elevation = 0,
    this.centerTitle = true,
  });

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

  void _handleBackPress(BuildContext context) {
    // Haptic feedback for back navigation
    HapticFeedback.lightImpact();

    if (onBackPressed != null) {
      onBackPressed!();
    } else {
      Navigator.of(context).pop();
    }
  }

  Widget _buildLeading(BuildContext context) {
    if (leading != null) {
      return leading!;
    }

    if (showBackButton && Navigator.of(context).canPop()) {
      return IconButton(
        icon: const Icon(Icons.arrow_back_ios_new),
        onPressed: () => _handleBackPress(context),
        tooltip: 'Atrás',
      );
    }

    return const SizedBox.shrink();
  }

  List<Widget> _buildActions(BuildContext context) {
    final List<Widget> actionWidgets = [];

    // Add custom actions if provided
    if (actions != null) {
      actionWidgets.addAll(actions!);
    }

    // Add contextual actions based on current route
    final currentRoute = ModalRoute.of(context)?.settings.name;

    switch (currentRoute) {
      case '/map-screen':
        actionWidgets.add(
          IconButton(
            icon: const Icon(Icons.my_location),
            onPressed: () {
              HapticFeedback.lightImpact();
              // Handle location centering
            },
            tooltip: 'Mi ubicación',
          ),
        );
        actionWidgets.add(
          IconButton(
            icon: const Icon(Icons.filter_list),
            onPressed: () {
              HapticFeedback.lightImpact();
              // Handle filter options
            },
            tooltip: 'Filtros',
          ),
        );
        break;
      case '/schedules-screen':
        actionWidgets.add(
          IconButton(
            icon: const Icon(Icons.refresh),
            onPressed: () {
              HapticFeedback.lightImpact();
              // Handle schedule refresh
            },
            tooltip: 'Actualizar',
          ),
        );
        break;
      case '/coupons-screen':
        actionWidgets.add(
          IconButton(
            icon: const Icon(Icons.qr_code_scanner),
            onPressed: () {
              HapticFeedback.lightImpact();
              // Handle QR code scanning
            },
            tooltip: 'Escanear',
          ),
        );
        break;
    }

    return actionWidgets;
  }

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);

    return AppBar(
      title: Text(
        title,
        style: theme.textTheme.titleLarge?.copyWith(
          fontWeight: FontWeight.w500,
          color: foregroundColor ?? theme.colorScheme.onSurface,
        ),
      ),
      leading: _buildLeading(context),
      actions: _buildActions(context),
      backgroundColor: backgroundColor ?? theme.colorScheme.surface,
      foregroundColor: foregroundColor ?? theme.colorScheme.onSurface,
      elevation: elevation,
      shadowColor: theme.shadowColor.withValues(alpha: 0.1),
      surfaceTintColor: Colors.transparent,
      centerTitle: centerTitle,
      systemOverlayStyle: SystemUiOverlayStyle(
        statusBarColor: Colors.transparent,
        statusBarIconBrightness: theme.brightness == Brightness.light
            ? Brightness.dark
            : Brightness.light,
        statusBarBrightness: theme.brightness,
      ),
    );
  }
}

/// Specialized app bar for map screen with location and filter controls
class CustomMapAppBar extends CustomAppBar {
  const CustomMapAppBar({
    super.key,
    super.title = 'Mapa de Rutas',
    super.showBackButton = false,
  });
}

/// Specialized app bar for schedules screen with refresh functionality
class CustomSchedulesAppBar extends CustomAppBar {
  const CustomSchedulesAppBar({
    super.key,
    super.title = 'Horarios',
  });
}

/// Specialized app bar for coupons screen with QR scanner
class CustomCouponsAppBar extends CustomAppBar {
  const CustomCouponsAppBar({
    super.key,
    super.title = 'Cupones',
  });
}

/// Specialized app bar for bus stop details with contextual actions
class CustomBusStopAppBar extends CustomAppBar {
  final String stopName;

  const CustomBusStopAppBar({
    super.key,
    required this.stopName,
  }) : super(title: stopName);

  @override
  List<Widget> _buildActions(BuildContext context) {
    return [
      IconButton(
        icon: const Icon(Icons.favorite_border),
        onPressed: () {
          HapticFeedback.lightImpact();
          // Handle adding to favorites
        },
        tooltip: 'Agregar a favoritos',
      ),
      IconButton(
        icon: const Icon(Icons.share),
        onPressed: () {
          HapticFeedback.lightImpact();
          // Handle sharing bus stop
        },
        tooltip: 'Compartir',
      ),
      ...super._buildActions(context),
    ];
  }
}