import 'dart:math';

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:solian/router.dart';
import 'package:solian/widgets/navigation/app_navigation.dart';

class AppNavigationRail extends StatefulWidget {
  final int initialIndex;

  const AppNavigationRail({super.key, this.initialIndex = 0});

  @override
  State<AppNavigationRail> createState() => _AppNavigationRailState();
}

class _AppNavigationRailState extends State<AppNavigationRail> {
  int? _currentIndex = 0;

  @override
  void initState() {
    super.initState();
    if (widget.initialIndex >= 0) {
      _currentIndex = widget.initialIndex;
    }
  }

  @override
  Widget build(BuildContext context) {
    return NavigationRail(
      selectedIndex: _currentIndex,
      labelType: NavigationRailLabelType.selected,
      groupAlignment: -1,
      destinations: AppNavigation.destinations
          .sublist(0, AppNavigation.destinations.length - 1)
          .map(
            (x) => NavigationRailDestination(
              icon: x.icon,
              label: Text(x.label),
            ),
          )
          .toList(),
      trailing: Expanded(
        child: Align(
          alignment: Alignment.bottomCenter,
          child: IconButton(
            icon: AppNavigation.destinations.last.icon,
            tooltip: AppNavigation.destinations.last.label,
            onPressed: () {
              setState(() => _currentIndex = null);
              AppRouter.instance.goNamed(AppNavigation.destinations.last.page);
            },
          ),
        ),
      ),
      onDestinationSelected: (idx) {
        setState(() => _currentIndex = idx);
        AppRouter.instance.goNamed(AppNavigation.destinations[idx].page);
      },
    ).paddingOnly(
      top: max(16, MediaQuery.of(context).padding.top),
      bottom: max(16, MediaQuery.of(context).padding.bottom),
    );
  }
}