549 lines
19 KiB
Dart
549 lines
19 KiB
Dart
import 'dart:convert';
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import 'package:flutter/material.dart';
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import 'package:flutter_lucide/flutter_lucide.dart';
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import 'package:get/get.dart';
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import 'package:on_field_work/controller/dashboard/dashboard_controller.dart';
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import 'package:on_field_work/helpers/services/gemini_service.dart';
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import 'package:on_field_work/helpers/utils/mixins/ui_mixin.dart';
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import 'package:on_field_work/helpers/widgets/my_spacing.dart';
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import 'package:on_field_work/helpers/widgets/my_text.dart';
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/// Floating Gemini assistant for mobile dashboard.
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/// Shows a circular FAB, which expands into a small chat panel from bottom-right.
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class GeminiFloatingAssistant extends StatefulWidget {
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final DashboardController dashboardController;
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const GeminiFloatingAssistant({
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super.key,
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required this.dashboardController,
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});
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@override
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State<GeminiFloatingAssistant> createState() =>
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_GeminiFloatingAssistantState();
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}
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class _GeminiFloatingAssistantState extends State<GeminiFloatingAssistant>
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with SingleTickerProviderStateMixin, UIMixin {
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// State
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final TextEditingController _promptController = TextEditingController();
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final RxList<Map<String, String>> _chatHistory =
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<Map<String, String>>[].obs;
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final RxBool _isLoading = false.obs;
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final RxBool _isAnalyzingData = false.obs;
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final RxString _error = ''.obs;
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final RxBool _isOpen = false.obs;
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final ScrollController _scrollController = ScrollController();
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late final AnimationController _animController;
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late final Animation<double> _scaleAnimation;
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late final Animation<double> _opacityAnimation;
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@override
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void initState() {
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super.initState();
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_animController = AnimationController(
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vsync: this,
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duration: const Duration(milliseconds: 280),
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);
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_scaleAnimation = CurvedAnimation(
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parent: _animController,
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curve: Curves.fastOutSlowIn,
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);
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_opacityAnimation = CurvedAnimation(
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parent: _animController,
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curve: Curves.easeInOut,
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);
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}
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// Scroll helper
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void _scrollToBottom() {
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WidgetsBinding.instance.addPostFrameCallback((_) {
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if (_scrollController.hasClients) {
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_scrollController.animateTo(
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_scrollController.position.maxScrollExtent,
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duration: const Duration(milliseconds: 250),
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curve: Curves.easeOut,
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);
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}
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});
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}
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// Toggle FAB / panel
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void _toggleOpen() {
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_error.value = '';
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final newValue = !_isOpen.value;
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_isOpen.value = newValue;
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if (newValue) {
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_animController.forward();
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} else {
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_animController.reverse();
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}
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}
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// Chat bubble
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Widget _buildResponseBubble(String text, bool isAI) {
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if (text.isEmpty) return const SizedBox.shrink();
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final Color backgroundColor =
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isAI ? Colors.blue.shade50 : contentTheme.primary.withOpacity(0.9);
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final Color textColor = isAI ? Colors.black87 : Colors.white;
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return Padding(
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padding: const EdgeInsets.symmetric(vertical: 4),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.start,
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mainAxisAlignment:
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isAI ? MainAxisAlignment.start : MainAxisAlignment.end,
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children: [
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if (isAI) ...[
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const Icon(LucideIcons.bot, color: Colors.blue, size: 20),
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MySpacing.width(8),
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],
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Flexible(
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child: Container(
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padding: const EdgeInsets.all(10),
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decoration: BoxDecoration(
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color: backgroundColor,
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borderRadius: BorderRadius.only(
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topLeft: const Radius.circular(14),
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topRight: const Radius.circular(14),
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bottomLeft:
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isAI ? Radius.zero : const Radius.circular(14),
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bottomRight:
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isAI ? const Radius.circular(14) : Radius.zero,
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),
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),
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child: MyText.bodySmall(
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text,
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color: textColor,
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height: 1.4,
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),
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),
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),
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if (!isAI) ...[
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MySpacing.width(8),
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const Icon(LucideIcons.user, color: Colors.black54, size: 18),
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],
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],
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),
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);
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}
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// Prompt submit
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Future<void> _handlePromptSubmission() async {
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final promptText = _promptController.text.trim();
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if (promptText.isEmpty || _isLoading.value || _isAnalyzingData.value) {
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return;
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}
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_chatHistory.add({'sender': 'user', 'message': promptText});
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_promptController.clear();
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_scrollToBottom();
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_isLoading.value = true;
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_error.value = '';
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// Placeholder
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_chatHistory.add({'sender': 'ai', 'message': 'Thinking...'});
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_scrollToBottom();
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final placeholderIndex = _chatHistory.length - 1;
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try {
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final result = await GeminiService.generateText(promptText);
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if (placeholderIndex >= 0 &&
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_chatHistory.length > placeholderIndex) {
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_chatHistory[placeholderIndex] = {
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'sender': 'ai',
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'message': result,
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};
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}
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_scrollToBottom();
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} catch (e, stack) {
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// ignore: avoid_print
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print("Gemini Error: $e\n$stack");
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_error.value =
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"An error occurred. Failed to get response: ${e.toString().split(':').first}";
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if (placeholderIndex >= 0 &&
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_chatHistory.length > placeholderIndex) {
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_chatHistory.removeAt(placeholderIndex);
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}
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} finally {
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_isLoading.value = false;
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}
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}
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// Expense analysis
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Future<void> _handleDataAnalysis() async {
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if (_isLoading.value || _isAnalyzingData.value) return;
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_isAnalyzingData.value = true;
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_error.value = '';
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const String analysisPrompt = 'Analyze my monthly expense overview.';
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_chatHistory.add({'sender': 'user', 'message': analysisPrompt});
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_chatHistory
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.add({'sender': 'ai', 'message': 'Analyzing monthly expenses...'});
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_scrollToBottom();
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final placeholderIndex = _chatHistory.length - 1;
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try {
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await widget.dashboardController.fetchMonthlyExpenses();
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final rawDataList = widget.dashboardController.monthlyExpenseList;
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if (rawDataList.isEmpty) {
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_error.value = "No monthly expense data found for analysis.";
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_chatHistory.removeAt(placeholderIndex);
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return;
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}
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final rawDataJson =
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jsonEncode(rawDataList.map((e) => e.toJson()).toList());
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final prompt =
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"Analyze the following monthly expense data and provide a concise "
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"summary, key trends (like increasing/decreasing expenses), and "
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"highlight the highest expense months. The data is a list of "
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"monthly expense summaries over time in JSON format:\n\n$rawDataJson";
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final result = await GeminiService.generateText(prompt);
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if (placeholderIndex >= 0 &&
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_chatHistory.length > placeholderIndex) {
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_chatHistory[placeholderIndex] = {
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'sender': 'ai',
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'message': result,
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};
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}
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_scrollToBottom();
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} catch (e, stack) {
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// ignore: avoid_print
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print("Gemini Data Analysis Error: $e\n$stack");
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_error.value =
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"Failed to analyze data. An error occurred: ${e.toString().split(':').first}";
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if (placeholderIndex >= 0 &&
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_chatHistory.length > placeholderIndex) {
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_chatHistory.removeAt(placeholderIndex);
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}
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} finally {
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_isAnalyzingData.value = false;
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}
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}
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// Small floating chat panel (mobile-friendly)
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Widget _buildFloatingPanel(BuildContext context) {
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final media = MediaQuery.of(context).size;
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final double panelWidth = media.width * 0.9;
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final double panelHeight = media.height * 0.45;
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return FadeTransition(
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opacity: _opacityAnimation,
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child: ScaleTransition(
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scale: _scaleAnimation,
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alignment: Alignment.bottomRight,
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child: Align(
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alignment: Alignment.bottomRight,
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child: Container(
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width: panelWidth,
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height: panelHeight,
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margin: const EdgeInsets.only(right: 16, bottom: 80),
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padding: const EdgeInsets.all(12),
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(18),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.18),
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blurRadius: 18,
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offset: const Offset(0, 8),
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),
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],
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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// Header
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Row(
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children: [
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Container(
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padding: const EdgeInsets.all(6),
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decoration: BoxDecoration(
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color: contentTheme.primary.withOpacity(0.1),
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shape: BoxShape.circle,
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),
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child: const Icon(
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LucideIcons.bot,
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size: 18,
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color: Colors.blue,
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),
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),
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MySpacing.width(8),
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Expanded(
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child: MyText.titleSmall(
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"Gemini AI Assistant",
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fontWeight: 700,
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overflow: TextOverflow.ellipsis,
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),
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),
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IconButton(
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splashRadius: 18,
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iconSize: 18,
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onPressed: _toggleOpen,
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icon: const Icon(Icons.close, color: Colors.black54),
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),
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],
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),
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MySpacing.height(4),
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MyText.labelSmall(
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"Ask questions or analyze expenses.",
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color: Colors.grey.shade600,
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),
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MySpacing.height(8),
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// Error
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Obx(
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() => _error.value.isNotEmpty
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? Container(
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padding: const EdgeInsets.all(8),
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margin: const EdgeInsets.only(bottom: 8),
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decoration: BoxDecoration(
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color: Colors.red.shade50,
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borderRadius: BorderRadius.circular(8),
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border:
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Border.all(color: Colors.red.shade200),
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),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Icon(
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LucideIcons.badge_alert,
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color: Colors.red,
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size: 16,
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),
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MySpacing.width(6),
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Expanded(
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child: MyText.bodySmall(
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_error.value,
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color: Colors.red.shade800,
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),
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),
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],
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),
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)
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: const SizedBox.shrink(),
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),
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// Chat list
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Expanded(
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child: Obx(
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() {
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if (_chatHistory.isEmpty) {
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return Center(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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Icon(
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LucideIcons.bot,
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size: 40,
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color: Colors.blue.shade300,
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),
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MySpacing.height(6),
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Text(
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"Ask me about your data!",
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style: TextStyle(
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color: Colors.grey.shade500,
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),
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),
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],
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),
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);
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}
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return ListView.builder(
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controller: _scrollController,
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itemCount: _chatHistory.length,
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padding:
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const EdgeInsets.symmetric(vertical: 4),
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itemBuilder: (context, index) {
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final message = _chatHistory[index];
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return _buildResponseBubble(
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message['message'] ?? '',
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message['sender'] == 'ai',
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);
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},
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);
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},
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),
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),
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MySpacing.height(6),
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// Bottom row: Analyze + input
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Row(
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children: [
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Obx(
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() => IconButton(
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splashRadius: 18,
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onPressed: (_isAnalyzingData.value ||
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_isLoading.value)
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? null
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: _handleDataAnalysis,
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iconSize: 22,
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icon: _isAnalyzingData.value
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? SizedBox(
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width: 18,
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height: 18,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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color: contentTheme.primary,
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),
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)
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: const Icon(
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LucideIcons.chart_line,
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color: Colors.blue,
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),
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tooltip: 'Analyze expenses',
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),
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),
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Expanded(
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child: Container(
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padding: const EdgeInsets.symmetric(
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horizontal: 10, vertical: 4),
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decoration: BoxDecoration(
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color: Colors.grey.shade100,
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borderRadius: BorderRadius.circular(999),
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border: Border.all(
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color: Colors.grey.shade300,
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),
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),
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child: Row(
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children: [
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Expanded(
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child: TextField(
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controller: _promptController,
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minLines: 1,
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maxLines: 3,
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keyboardType: TextInputType.multiline,
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decoration: InputDecoration(
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hintText: "Ask Gemini…",
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border: InputBorder.none,
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isDense: true,
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hintStyle: TextStyle(
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color: Colors.grey.shade500,
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fontSize: 13,
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),
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),
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onSubmitted: (_) =>
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_handlePromptSubmission(),
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enabled: !_isAnalyzingData.value,
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),
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),
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Obx(
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() => IconButton(
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splashRadius: 18,
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iconSize: 18,
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onPressed: (_isLoading.value ||
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_isAnalyzingData.value ||
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_promptController.text
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.trim()
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.isEmpty)
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? null
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: _handlePromptSubmission,
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icon: _isLoading.value
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? SizedBox(
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width: 18,
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height: 18,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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color: contentTheme.primary,
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),
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)
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: Icon(
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LucideIcons.send,
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color: _promptController.text
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.trim()
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.isEmpty
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? Colors.grey.shade400
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: contentTheme.primary,
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),
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),
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),
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],
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),
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),
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),
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],
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),
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],
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),
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),
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),
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),
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);
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}
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// FAB
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Widget _buildFab() {
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return Obx(
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() => AnimatedScale(
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scale: _isOpen.value ? 0.0 : 1.0,
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duration: const Duration(milliseconds: 200),
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curve: Curves.easeOut,
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child: FloatingActionButton.extended(
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onPressed: _toggleOpen,
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heroTag: 'gemini_fab',
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backgroundColor: contentTheme.primary,
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icon: const Icon(LucideIcons.bot),
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label: const Text(
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'Ask Me Anything',
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style: TextStyle(fontSize: 14, fontWeight: FontWeight.w600),
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),
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),
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),
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);
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}
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// Dim background when open
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Widget _buildScrim() {
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return Obx(
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() => _isOpen.value
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? FadeTransition(
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opacity: _opacityAnimation,
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child: GestureDetector(
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onTap: _toggleOpen,
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child: Container(
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color: Colors.black.withOpacity(0.25),
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),
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),
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)
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: const SizedBox.shrink(),
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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 Stack(
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children: [
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// Scrim behind panel
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_buildScrim(),
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// Panel
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_buildFloatingPanel(context),
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// FAB
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Positioned(
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bottom: 16,
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right: 16,
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child: _buildFab(),
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),
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],
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);
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}
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@override
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void dispose() {
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_promptController.dispose();
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_scrollController.dispose();
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_animController.dispose();
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super.dispose();
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}
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}
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