// * Widget for selecting the sampling type for camera trap monitoring
// * Features:
// * - Two sampling modes: opportunistic and systematic
// * - Radio button selection interface
// * - State management for selection
// * - Callback for selection changes

import 'package:flutter/material.dart';
import 'package:fforte/l10n/app_localizations.dart';

/// Widget for managing sampling type selection
/// Provides choice between opportunistic and systematic sampling
class STTyp extends StatefulWidget {
  /// Callback function when sampling type changes
  final Function(String) onSTTypChanged;
  /// Initial sampling type value
  final String initialSTTyp;

  const STTyp(
      {super.key,
      required this.onSTTypChanged,
      this.initialSTTyp = 'opportunistisch'});

  @override
  State<STTyp> createState() => _STTypState();
}

/// State class for the sampling type selection widget
class _STTypState extends State<STTyp> {
  /// Currently selected sampling type
  String? _selectedSTTyp;

  @override
  void initState() {
    super.initState();
    _selectedSTTyp = widget.initialSTTyp;
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        // Opportunistic sampling option
        ListTile(
          visualDensity: const VisualDensity(vertical: -4),
          title: Text(AppLocalizations.of(context)!.opportunistisch),
          leading: Radio<String>(
            value: 'opportunistisch',
            groupValue: _selectedSTTyp,
            onChanged: (value) {
              setState(() {
                _selectedSTTyp = value;
                widget.onSTTypChanged(value!);
              });
            },
          ),
        ),
        // Systematic sampling option
        ListTile(
          visualDensity: const VisualDensity(vertical: -4),
          title: Text(AppLocalizations.of(context)!.systematisch),
          leading: Radio<String>(
            value: 'systematisch',
            groupValue: _selectedSTTyp,
            onChanged: (value) {
              setState(() {
                _selectedSTTyp = value;
                widget.onSTTypChanged(value!);
              });
            },
          ),
        ),
      ],
    );
  }
}