126 lines
3.8 KiB
Dart
126 lines
3.8 KiB
Dart
import 'package:flutter/material.dart';
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import '../services/ai_service.dart';
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import '../utils/snackbar.dart';
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typedef TextUpdateCallback = void Function(String updatedText);
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typedef ProcessingStateCallback = void Function(bool isProcessing);
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/// An AI icon button that immediately enhances the text in [textController]
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/// when pressed — no dialog, no language detection.
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///
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/// Provide [promptBuilder] to give the AI field-specific context. It receives
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/// the current (trimmed) text and must return the prompt instruction string.
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class GeminiButton extends StatefulWidget {
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final TextEditingController textController;
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final TextUpdateCallback onTextUpdated;
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final ProcessingStateCallback? onProcessingStateChanged;
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final String? tooltip;
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/// Optional callback that builds the Gemini prompt instruction from the
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/// current field text (called at press time, so captures live context).
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final String Function(String text)? promptBuilder;
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/// Called when the active AI provider changes.
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/// [isDeepSeek] is true once Gemini fails and DeepSeek takes over.
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/// Called with false again when processing finishes.
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final void Function(bool isDeepSeek)? onProviderChanged;
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const GeminiButton({
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super.key,
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required this.textController,
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required this.onTextUpdated,
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this.onProcessingStateChanged,
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this.tooltip,
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this.promptBuilder,
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this.onProviderChanged,
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});
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@override
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State<GeminiButton> createState() => _GeminiButtonState();
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}
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class _GeminiButtonState extends State<GeminiButton> {
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bool _isProcessing = false;
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AiService? _aiService;
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@override
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void initState() {
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super.initState();
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try {
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_aiService = AiService();
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} catch (_) {
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// dotenv not initialised (e.g. in tests) — button renders but is inert.
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}
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}
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Future<void> _enhance(BuildContext context) async {
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final service = _aiService;
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if (service == null) {
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if (!context.mounted) return;
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showWarningSnackBar(context, 'AI service is not available');
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return;
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}
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final text = widget.textController.text.trim();
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if (text.isEmpty) {
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if (!context.mounted) return;
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showWarningSnackBar(context, 'Please enter some text first');
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return;
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}
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setState(() {
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_isProcessing = true;
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});
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widget.onProcessingStateChanged?.call(true);
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widget.onProviderChanged?.call(false);
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try {
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final instruction = widget.promptBuilder?.call(text);
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final improvedText = await service.enhanceText(
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text,
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promptInstruction: instruction,
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onFallbackToDeepSeek: () {
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if (mounted) {
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widget.onProviderChanged?.call(true);
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}
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},
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);
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final trimmed = improvedText.trim();
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widget.textController.text = trimmed;
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widget.onTextUpdated(trimmed);
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if (!context.mounted) return;
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showSuccessSnackBar(context, 'Text improved successfully');
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} catch (e) {
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if (!context.mounted) return;
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showErrorSnackBar(context, 'Error: $e');
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} finally {
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if (mounted) {
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setState(() {
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_isProcessing = false;
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});
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}
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widget.onProcessingStateChanged?.call(false);
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widget.onProviderChanged?.call(false);
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}
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}
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@override
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Widget build(BuildContext context) {
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return IconButton(
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tooltip: widget.tooltip ?? 'Improve with Gemini',
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icon: _isProcessing
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? const SizedBox(
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width: 24,
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height: 24,
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child: CircularProgressIndicator(strokeWidth: 2),
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)
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: Image.asset(
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'gemini_icon.png',
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width: 24,
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height: 24,
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errorBuilder: (context, error, stackTrace) =>
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const Icon(Icons.auto_awesome),
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),
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onPressed: _isProcessing ? null : () => _enhance(context),
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);
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}
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}
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