GroundedHelper/frontend/lib/Grounded/designs/FloatingNav.dart

import 'package:flutter/material.dart';

import '../about/internal/application/TextType.dart';
import '../utils/Colors.dart';
import 'GlassSurface.dart';
import 'text/Text.dart';

typedef NavEntry = ({IconData icon, String label, VoidCallback onTap});

/// The floating tab bar: the selected tab is a filled night block, the rest
/// sit quietly on white. An optional dark action button can sit beside it.
class FloatingNav extends StatelessWidget {
  final List<NavEntry> entries;

  final int selected;

  final IconData? actionIcon;

  final VoidCallback? onAction;

  const FloatingNav({
    super.key,
    required this.entries,
    required this.selected,
    this.actionIcon,
    this.onAction,
  });

  @override
  Widget build(BuildContext context) {
    return SafeArea(
      top: false,
      child: Padding(
        padding: const EdgeInsets.fromLTRB(16, 0, 16, 14),
        child: Row(
          children: [
            Expanded(
              child: Container(
                decoration: BoxDecoration(
                  borderRadius: BorderRadius.zero,
                  boxShadow: const [
                    BoxShadow(
                      color: Color(0x1A1A1F1C),
                      blurRadius: 30,
                      offset: Offset(0, 10),
                    ),
                  ],
                ),
                child: GlassSurface(
                  radius: BorderRadius.zero,
                  tint: colorGlassStrong,
                  padding: const EdgeInsets.all(6),
                  child: Row(
                    children: [
                      for (int index = 0; index < entries.length; index++)
                        Expanded(child: _tab(entries[index], index == selected)),
                    ],
                  ),
                ),
              ),
            ),
            if (onAction != null) ...[
            const SizedBox(width: 10),
            GestureDetector(
              onTap: onAction,
              child: Container(
                width: 72,
                height: 72,
                decoration: BoxDecoration(
                  gradient: const RadialGradient(
                    center: Alignment(-0.3, -0.4),
                    colors: <Color>[colorNightGlow, colorNight],
                  ),
                  border: Border.all(color: colorWhite, width: 3),
                  boxShadow: const [
                    BoxShadow(
                      color: Color(0x331A1F1C),
                      blurRadius: 24,
                      offset: Offset(0, 10),
                    ),
                  ],
                ),
                child: Icon(actionIcon, size: 24, color: colorLime),
              ),
            ),
            ],
          ],
        ),
      ),
    );
  }

  Widget _tab(NavEntry entry, bool active) {
    return GestureDetector(
      onTap: entry.onTap,
      behavior: HitTestBehavior.opaque,
      child: AnimatedContainer(
        duration: const Duration(milliseconds: 220),
        curve: Curves.easeOutCubic,
        padding: const EdgeInsets.symmetric(vertical: 10),
        decoration: BoxDecoration(
          color: active ? colorHeaderBottom : colorWhite.withValues(alpha: 0.0),
          borderRadius: BorderRadius.zero,
          boxShadow: active
              ? const [
                  BoxShadow(
                    color: Color(0x141A1F1C),
                    blurRadius: 12,
                    offset: Offset(0, 4),
                  ),
                ]
              : const [],
        ),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            Icon(entry.icon,
                size: 23, color: active ? colorWhite : colorInkSoft),
            const SizedBox(height: 4),
            text(entry.label, 10, active ? TextType.Medium : TextType.Regular,
                color: active ? colorWhite : colorInkSoft, maxLines: 1),
          ],
        ),
      ),
    );
  }
}