/*
 * Copyright (c) 2024-2025 Fabian Freund.
 *
 * This file is part of WebLibre
 * (see https://weblibre.eu).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
import 'dart:async';

import 'package:flutter/material.dart';
import 'package:speech_to_text_dialog/speech_to_text_dialog.dart';
import 'package:weblibre/utils/ui_helper.dart' as ui_helper;

class SpeechToTextButton extends StatefulWidget {
  final Function(String text) onTextReceived;

  const SpeechToTextButton({required this.onTextReceived, super.key});

  @override
  State<SpeechToTextButton> createState() => _SpeechToTextButtonState();
}

class _SpeechToTextButtonState extends State<SpeechToTextButton> {
  final _speechDialog = SpeechToTextDialog();
  StreamSubscription<String>? _textSubscription;

  @override
  void dispose() {
    _textSubscription?.cancel().ignore();
    _speechDialog.dispose();
    super.dispose();
  }

  Future<void> _showSpeechDialog(BuildContext context) async {
    // Cancel any existing subscription
    await _textSubscription?.cancel();

    // Listen for the next text result
    _textSubscription = _speechDialog.textStream.take(1).listen((text) {
      if (text.isNotEmpty) {
        widget.onTextReceived(text);
      }
    });

    // Show the dialog
    final isServiceAvailable = await _speechDialog.showDialog(
      // locale: "en-US",
    );

    if (!isServiceAvailable) {
      if (context.mounted) {
        ui_helper.showErrorMessage(context, 'Service is not available');
      }
      await _textSubscription?.cancel();
    }
  }

  @override
  Widget build(BuildContext context) {
    return IconButton(
      onPressed: () => _showSpeechDialog(context),
      icon: const Icon(Icons.mic),
    );
  }
}