// * Widget for recording presence of dogs and their leash status during excursions
// * Features:
// * - Dog presence selection (yes/no)
// * - Conditional leash status selection
// * - State persistence via text controllers
// * - Localized labels

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

/// Widget for managing information about dogs during wildlife monitoring
/// Tracks both presence of dogs and whether they are leashed
class HundULeine extends StatefulWidget {
  /// Controller for dog presence status (yes/name or no)
  final TextEditingController mHund;
  /// Controller for leash status
  final TextEditingController mLeine;

  const HundULeine({super.key, required this.mHund, required this.mLeine});

  @override
  HundULeineState createState() => HundULeineState();
}

/// State class for the dog and leash selection widget
class HundULeineState extends State<HundULeine> {
  /// Currently selected dog presence value
  late String _selectedMHundValue;
  /// Currently selected leash status value
  late String _selectedMLeineValue;
  /// Whether to show leash selection options
  bool visible = false;

  @override
  void initState() {
    // Initialize dog presence selection
    if (widget.mHund.text == "") {
      _selectedMHundValue = "nein";
    } else {
      _selectedMHundValue = widget.mHund.text;
      visible = true;
    }

    // Initialize leash status selection
    if (widget.mLeine.text == "") {
      _selectedMLeineValue = "nein";
    } else {
      _selectedMLeineValue = widget.mLeine.text;
    }

    super.initState();
  }

  /// Update widget state and controller values when selections change
  /// @param mHund New dog presence value
  /// @param mLeine New leash status value
  void onValueChanged(String mHund, String mLeine) {
    setState(() {
      visible = mHund == "ja" ? true : false;
      _selectedMHundValue = mHund;
      _selectedMLeineValue = mLeine;
      widget.mHund.text = mHund;
      widget.mLeine.text = mLeine;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        // Dog presence section header
        Align(
          alignment: Alignment.bottomLeft,
          child: Text(AppLocalizations.of(context)!.mHund),
        ),
        // Dog presence - Yes option
        ListTile(
          visualDensity: const VisualDensity(vertical: -4),
          title: Text(AppLocalizations.of(context)!.ja),
          leading: Radio<String>(
            value: "ja",
            groupValue: _selectedMHundValue,
            onChanged: (value) {
              onValueChanged(value!, _selectedMLeineValue);
            },
          ),
        ),
        // Dog presence - No option
        ListTile(
          visualDensity: const VisualDensity(vertical: -4),
          title: Text(AppLocalizations.of(context)!.nein),
          leading: Radio<String>(
            value: "nein",
            groupValue: _selectedMHundValue,
            onChanged: (value) {
              onValueChanged(value!, "nein");
            },
          ),
        ),
        // Conditional leash status section
        if (visible) ...[
          // Leash status section header
          Align(
            alignment: Alignment.bottomLeft,
            child: Text(AppLocalizations.of(context)!.mLeine),
          ),
          // Leash status - Yes option
          ListTile(
            visualDensity: const VisualDensity(vertical: -4),
            title: Text(AppLocalizations.of(context)!.ja),
            leading: Radio<String>(
              value: "ja",
              groupValue: _selectedMLeineValue,
              onChanged: (value) {
                onValueChanged("ja", value!);
              },
            ),
          ),
          // Leash status - No option
          ListTile(
            visualDensity: const VisualDensity(vertical: -4),
            title: Text(AppLocalizations.of(context)!.nein),
            leading: Radio<String>(
              value: "nein",
              groupValue: _selectedMLeineValue,
              onChanged: (value) {
                onValueChanged("ja", value!);
              },
            ),
          ),
        ],
      ],
    );
  }
}