chanora/apps/chanora_flutter/lib/widgets/voice_settings.dart

// Voice settings dialog (SDD-097). Surfaces a TransmitMode radio
// group, a bind-key button, and a release-tail slider.

import 'package:flutter/material.dart';

import '../l10n/generated/app_localizations.dart';
import '../src/rust/api.dart' as rust;

/// Result returned by [`VoiceSettingsDialog`]. `null` indicates a
/// cancelled dialog.
class VoiceSettingsResult {
  /// Construct a result snapshot.
  const VoiceSettingsResult({
    required this.mode,
    required this.releaseTailMs,
    required this.bindKeyRequested,
  });

  /// Selected transmit mode.
  final rust.BridgeTransmitMode mode;

  /// Chosen release-tail in milliseconds (0..=500, step 25).
  final int releaseTailMs;

  /// True when the user tapped the "bind key" button. The caller
  /// is expected to open the focus-scoped capture dialog
  /// afterwards.
  final bool bindKeyRequested;
}

/// Voice settings dialog widget.
class VoiceSettingsDialog extends StatefulWidget {
  /// Construct a dialog seeded with the current settings.
  const VoiceSettingsDialog({
    super.key,
    required this.initialMode,
    required this.initialReleaseTailMs,
  });

  /// Currently active transmit mode.
  final rust.BridgeTransmitMode initialMode;

  /// Currently configured release tail in milliseconds.
  final int initialReleaseTailMs;

  @override
  State<VoiceSettingsDialog> createState() => _VoiceSettingsDialogState();
}

class _VoiceSettingsDialogState extends State<VoiceSettingsDialog> {
  late rust.BridgeTransmitMode _mode;
  late double _releaseTail;

  @override
  void initState() {
    super.initState();
    _mode = widget.initialMode;
    _releaseTail = widget.initialReleaseTailMs.clamp(0, 500).toDouble();
  }

  @override
  Widget build(BuildContext context) {
    final l10n = AppL10n.of(context);
    final theme = Theme.of(context);
    return AlertDialog(
      title: Text(l10n.voiceSettingsTitle),
      content: SizedBox(
        width: 360,
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(
              l10n.voiceModeLabel,
              style: theme.textTheme.titleSmall,
            ),
            const SizedBox(height: 4),
            RadioListTile<rust.BridgeTransmitMode>(
              dense: true,
              value: rust.BridgeTransmitMode.ptt,
              groupValue: _mode,
              title: Text(l10n.voiceModePtt),
              onChanged: (v) => setState(() => _mode = v!),
            ),
            RadioListTile<rust.BridgeTransmitMode>(
              dense: true,
              value: rust.BridgeTransmitMode.continuous,
              groupValue: _mode,
              title: Text(l10n.voiceModeContinuous),
              onChanged: (v) => setState(() => _mode = v!),
            ),
            RadioListTile<rust.BridgeTransmitMode>(
              dense: true,
              value: rust.BridgeTransmitMode.voiceActivity,
              groupValue: _mode,
              title: Text(l10n.voiceModeVoiceActivity),
              secondary: Text(
                l10n.voiceModeComingSoon,
                style: theme.textTheme.bodySmall,
              ),
              // VoiceActivity is reserved per DEC-030 — keep the
              // tile visible but disabled per SDD-095.
              onChanged: null,
            ),
            const Divider(),
            OutlinedButton.icon(
              icon: const Icon(Icons.keyboard),
              label: Text(l10n.voiceBindKeyAction),
              onPressed: () {
                Navigator.of(context).pop(
                  VoiceSettingsResult(
                    mode: _mode,
                    releaseTailMs: _releaseTail.round(),
                    bindKeyRequested: true,
                  ),
                );
              },
            ),
            const SizedBox(height: 8),
            Text(
              l10n.voiceReleaseTailLabel,
              style: theme.textTheme.titleSmall,
            ),
            Row(
              children: [
                Expanded(
                  child: Slider(
                    value: _releaseTail,
                    min: 0,
                    max: 500,
                    divisions: 20, // step 25 ms
                    label: '${_releaseTail.round()}${l10n.voiceReleaseTailHint}',
                    onChanged: (v) => setState(() => _releaseTail = v),
                  ),
                ),
                SizedBox(
                  width: 64,
                  child: Text(
                    '${_releaseTail.round()}${l10n.voiceReleaseTailHint}',
                    style: theme.textTheme.bodySmall,
                    textAlign: TextAlign.end,
                  ),
                ),
              ],
            ),
          ],
        ),
      ),
      actions: [
        TextButton(
          onPressed: () => Navigator.of(context).pop(),
          child: Text(l10n.closeAction),
        ),
        FilledButton(
          onPressed: () => Navigator.of(context).pop(
            VoiceSettingsResult(
              mode: _mode,
              releaseTailMs: _releaseTail.round(),
              bindKeyRequested: false,
            ),
          ),
          child: Text(l10n.pttConfigureSaveAction),
        ),
      ],
    );
  }
}