social-app/apps/lib/features/home/ui/widgets/home_floating_header.dart

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

import '../../../../core/theme/design_tokens.dart';

const homeFloatingHeaderKey = ValueKey('home_floating_header');

class HomeFloatingHeader extends StatelessWidget {
  const HomeFloatingHeader({
    super.key,
    required this.unreadCount,
    required this.onTapSettings,
    required this.onTapCalendar,
    required this.onTapMessages,
  });

  final int unreadCount;
  final VoidCallback onTapSettings;
  final VoidCallback onTapCalendar;
  final VoidCallback onTapMessages;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.fromLTRB(
        AppSpacing.lg,
        AppSpacing.sm,
        AppSpacing.lg,
        AppSpacing.md,
      ),
      child: Container(
        key: homeFloatingHeaderKey,
        padding: const EdgeInsets.symmetric(
          horizontal: AppSpacing.sm,
          vertical: AppSpacing.xs,
        ),
        decoration: BoxDecoration(
          color: AppColors.homeToolbarSurface,
          borderRadius: BorderRadius.circular(AppRadius.full),
          border: Border.all(color: AppColors.homeToolbarBorder),
          boxShadow: const [
            BoxShadow(
              color: AppColors.white,
              blurRadius: AppRadius.md,
              offset: Offset(0, -(AppSpacing.xs / 2)),
            ),
            BoxShadow(
              color: AppColors.slate200,
              blurRadius: AppRadius.lg,
              offset: Offset(0, AppSpacing.sm - (AppSpacing.xs / 2)),
            ),
          ],
        ),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            _HeaderIconButton(
              icon: LucideIcons.settings,
              onPressed: onTapSettings,
            ),
            Row(
              crossAxisAlignment: CrossAxisAlignment.center,
              children: [
                _HeaderIconButton(
                  icon: LucideIcons.calendar,
                  onPressed: onTapCalendar,
                ),
                const SizedBox(width: AppSpacing.sm),
                _MessagesButton(
                  unreadCount: unreadCount,
                  onPressed: onTapMessages,
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

class _HeaderIconButton extends StatelessWidget {
  const _HeaderIconButton({required this.icon, required this.onPressed});

  final IconData icon;
  final VoidCallback onPressed;

  @override
  Widget build(BuildContext context) {
    return IconButton(
      visualDensity: VisualDensity.compact,
      onPressed: onPressed,
      icon: Icon(icon, size: AppSpacing.xxl, color: AppColors.slate900),
    );
  }
}

class _MessagesButton extends StatelessWidget {
  const _MessagesButton({required this.unreadCount, required this.onPressed});

  final int unreadCount;
  final VoidCallback onPressed;

  @override
  Widget build(BuildContext context) {
    return IconButton(
      visualDensity: VisualDensity.compact,
      onPressed: onPressed,
      icon: Stack(
        clipBehavior: Clip.none,
        children: [
          const Icon(
            LucideIcons.messageSquare,
            size: AppSpacing.xxl,
            color: AppColors.slate900,
          ),
          if (unreadCount > 0)
            Positioned(
              right: -AppSpacing.xs,
              top: -AppSpacing.xs,
              child: Container(
                padding: const EdgeInsets.symmetric(
                  horizontal: AppSpacing.xs,
                  vertical: AppSpacing.xs / 2,
                ),
                decoration: BoxDecoration(
                  color: AppColors.red500,
                  borderRadius: BorderRadius.circular(AppSpacing.sm),
                ),
                constraints: const BoxConstraints(
                  minWidth: AppSpacing.lg,
                  minHeight: AppSpacing.lg,
                ),
                child: Text(
                  unreadCount > 99 ? '99+' : unreadCount.toString(),
                  textAlign: TextAlign.center,
                  style: const TextStyle(
                    fontSize: AppSpacing.sm + (AppSpacing.xs / 2),
                    fontWeight: FontWeight.w600,
                    color: AppColors.white,
                  ),
                ),
              ),
            ),
        ],
      ),
    );
  }
}