social-app/apps/lib/shared/widgets/app_selection_sheet.dart

import 'package:flutter/material.dart';

import '../../core/l10n/l10n.dart';
import '../../core/theme/design_tokens.dart';
import 'app_button.dart';

class AppSelectionItem<T> {
  const AppSelectionItem({required this.value, required this.label});

  final T value;
  final String label;
}

Future<T?> showAppSelectionSheet<T>(
  BuildContext context, {
  required String title,
  required List<AppSelectionItem<T>> items,
  required T? selectedValue,
}) async {
  final result = await showModalBottomSheet<T>(
    context: context,
    isScrollControlled: true,
    backgroundColor: Colors.transparent,
    builder: (sheetContext) {
      return SafeArea(
        top: false,
        child: Container(
          margin: const EdgeInsets.fromLTRB(
            AppSpacing.md,
            AppSpacing.none,
            AppSpacing.md,
            AppSpacing.md,
          ),
          padding: const EdgeInsets.symmetric(vertical: AppSpacing.lg),
          decoration: BoxDecoration(
            color: AppColors.white,
            borderRadius: BorderRadius.circular(AppRadius.xl),
            border: Border.all(color: AppColors.borderSecondary),
          ),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Padding(
                padding: const EdgeInsets.symmetric(horizontal: AppSpacing.lg),
                child: Text(
                  title,
                  textAlign: TextAlign.center,
                  style: const TextStyle(
                    fontSize: 17,
                    fontWeight: FontWeight.w700,
                    color: AppColors.slate900,
                  ),
                ),
              ),
              const SizedBox(height: AppSpacing.md),
              ...items.map((item) {
                final isSelected = item.value == selectedValue;
                return _buildItem(
                  sheetContext,
                  item: item,
                  isSelected: isSelected,
                );
              }),
              const SizedBox(height: AppSpacing.sm),
              const Divider(height: 1, color: AppColors.border),
              const SizedBox(height: AppSpacing.sm),
              Padding(
                padding: const EdgeInsets.symmetric(horizontal: AppSpacing.lg),
                child: SizedBox(
                  height: 48,
                  child: AppButton(
                    text: context.l10n.commonCancel,
                    isOutlined: true,
                    onPressed: () => Navigator.of(sheetContext).pop(),
                  ),
                ),
              ),
            ],
          ),
        ),
      );
    },
  );
  return result;
}

Widget _buildItem<T>(
  BuildContext sheetContext, {
  required AppSelectionItem<T> item,
  required bool isSelected,
}) {
  return InkWell(
    onTap: () => Navigator.of(sheetContext).pop(item.value),
    child: Container(
      padding: const EdgeInsets.symmetric(
        horizontal: AppSpacing.lg,
        vertical: AppSpacing.md,
      ),
      child: Row(
        children: [
          Expanded(
            child: Text(
              item.label,
              style: TextStyle(
                fontSize: 15,
                fontWeight: isSelected ? FontWeight.w600 : FontWeight.w500,
                color: isSelected ? AppColors.blue600 : AppColors.slate800,
              ),
            ),
          ),
          if (isSelected)
            const Icon(Icons.check, size: 20, color: AppColors.blue600),
        ],
      ),
    ),
  );
}