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sjk
405
client/lib/features/ai/pages/ai_main_page.dart
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405
client/lib/features/ai/pages/ai_main_page.dart
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import 'package:flutter/material.dart';
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import 'ai_writing_page.dart';
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import 'ai_speaking_page.dart';
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import '../../../core/network/ai_api_service.dart';
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/// AI功能主页面
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class AIMainPage extends StatefulWidget {
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const AIMainPage({Key? key}) : super(key: key);
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@override
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State<AIMainPage> createState() => _AIMainPageState();
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}
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class _AIMainPageState extends State<AIMainPage> {
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final AIApiService _aiApiService = AIApiService();
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Map<String, dynamic>? _usageStats;
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bool _isLoadingStats = false;
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@override
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void initState() {
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super.initState();
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_loadUsageStats();
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}
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Future<void> _loadUsageStats() async {
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setState(() {
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_isLoadingStats = true;
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});
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try {
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final stats = await _aiApiService.getAIUsageStats();
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setState(() {
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_usageStats = stats;
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_isLoadingStats = false;
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});
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} catch (e) {
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setState(() {
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_isLoadingStats = false;
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});
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// 静默处理错误，不影响用户体验
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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 Scaffold(
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appBar: AppBar(
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title: const Text('AI智能助手'),
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backgroundColor: Theme.of(context).primaryColor,
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foregroundColor: Colors.white,
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actions: [
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IconButton(
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icon: const Icon(Icons.refresh),
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onPressed: _loadUsageStats,
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tooltip: '刷新统计',
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),
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],
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),
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body: SingleChildScrollView(
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padding: const EdgeInsets.all(16.0),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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// 欢迎卡片
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Card(
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elevation: 4,
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child: Container(
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width: double.infinity,
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padding: const EdgeInsets.all(20.0),
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(12),
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gradient: LinearGradient(
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colors: [
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Theme.of(context).primaryColor,
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Theme.of(context).primaryColor.withOpacity(0.8),
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],
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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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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const Row(
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children: [
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Icon(
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Icons.psychology,
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color: Colors.white,
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size: 32,
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),
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SizedBox(width: 12),
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Text(
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'AI智能助手',
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style: TextStyle(
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color: Colors.white,
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fontSize: 24,
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fontWeight: FontWeight.bold,
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),
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),
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],
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),
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const SizedBox(height: 8),
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const Text(
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'让AI帮助您提升英语学习效果',
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style: TextStyle(
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color: Colors.white70,
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fontSize: 16,
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),
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),
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const SizedBox(height: 16),
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Row(
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children: [
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_buildFeatureChip('智能批改', Icons.edit),
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const SizedBox(width: 8),
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_buildFeatureChip('口语评估', Icons.mic),
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const SizedBox(width: 8),
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_buildFeatureChip('个性推荐', Icons.recommend),
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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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const SizedBox(height: 24),
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// 功能模块
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const Text(
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'AI功能',
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style: TextStyle(
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fontSize: 20,
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fontWeight: FontWeight.bold,
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),
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),
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const SizedBox(height: 16),
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// 功能卡片网格
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GridView.count(
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shrinkWrap: true,
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physics: const NeverScrollableScrollPhysics(),
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crossAxisCount: 2,
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crossAxisSpacing: 16,
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mainAxisSpacing: 16,
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childAspectRatio: 1.2,
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children: [
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_buildFeatureCard(
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title: '写作批改',
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subtitle: 'AI智能批改英文写作',
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icon: Icons.edit_note,
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color: Colors.blue,
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onTap: () {
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Navigator.push(
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context,
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MaterialPageRoute(
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builder: (context) => const AIWritingPage(),
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),
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);
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},
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),
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_buildFeatureCard(
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title: '口语评估',
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subtitle: 'AI评估发音和流利度',
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icon: Icons.record_voice_over,
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color: Colors.green,
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onTap: () {
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Navigator.push(
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context,
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MaterialPageRoute(
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builder: (context) => const AISpeakingPage(),
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),
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);
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},
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),
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_buildFeatureCard(
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title: '智能推荐',
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subtitle: '个性化学习内容推荐',
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icon: Icons.lightbulb,
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color: Colors.orange,
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onTap: () {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('智能推荐功能即将上线')),
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);
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},
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),
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_buildFeatureCard(
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title: '练习生成',
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subtitle: 'AI生成个性化练习题',
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icon: Icons.quiz,
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color: Colors.purple,
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onTap: () {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('练习生成功能即将上线')),
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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(height: 24),
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// 使用统计
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if (_usageStats != null)
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Card(
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child: Padding(
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padding: const EdgeInsets.all(16.0),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Row(
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children: [
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Icon(Icons.analytics, color: Colors.blue),
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SizedBox(width: 8),
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Text(
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'使用统计',
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style: TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.bold,
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),
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),
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],
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),
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const SizedBox(height: 16),
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Row(
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children: [
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Expanded(
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child: _buildStatItem(
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'写作批改',
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'${_usageStats!['writing_corrections'] ?? 0}',
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Icons.edit,
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Colors.blue,
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),
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),
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Expanded(
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child: _buildStatItem(
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'口语评估',
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'${_usageStats!['speaking_evaluations'] ?? 0}',
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Icons.mic,
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Colors.green,
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),
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),
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],
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),
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const SizedBox(height: 12),
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Row(
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children: [
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Expanded(
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child: _buildStatItem(
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'总使用次数',
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'${_usageStats!['total_usage'] ?? 0}',
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Icons.trending_up,
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Colors.orange,
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),
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),
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Expanded(
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child: _buildStatItem(
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'本月使用',
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'${_usageStats!['monthly_usage'] ?? 0}',
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Icons.calendar_month,
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Colors.purple,
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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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// 加载统计时的占位符
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if (_isLoadingStats)
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const Card(
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child: Padding(
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padding: EdgeInsets.all(16.0),
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child: Center(
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child: Column(
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children: [
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CircularProgressIndicator(),
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SizedBox(height: 8),
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Text('加载使用统计中...'),
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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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Widget _buildFeatureChip(String label, IconData icon) {
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return Container(
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padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
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decoration: BoxDecoration(
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color: Colors.white.withOpacity(0.2),
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borderRadius: BorderRadius.circular(16),
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),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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Icon(icon, color: Colors.white, size: 16),
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const SizedBox(width: 4),
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Text(
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label,
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style: const TextStyle(
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color: Colors.white,
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fontSize: 12,
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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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Widget _buildFeatureCard({
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required String title,
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required String subtitle,
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required IconData icon,
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required Color color,
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required VoidCallback onTap,
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}) {
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return Card(
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elevation: 2,
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child: InkWell(
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onTap: onTap,
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borderRadius: BorderRadius.circular(12),
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child: Padding(
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padding: const EdgeInsets.all(16.0),
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Container(
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padding: const EdgeInsets.all(12),
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decoration: BoxDecoration(
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color: color.withOpacity(0.1),
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shape: BoxShape.circle,
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),
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child: Icon(
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icon,
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color: color,
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size: 32,
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),
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),
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const SizedBox(height: 12),
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Text(
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title,
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style: const TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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),
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 4),
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Text(
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subtitle,
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey.shade600,
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),
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textAlign: TextAlign.center,
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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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Widget _buildStatItem(
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String label,
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String value,
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IconData icon,
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Color color,
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) {
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return Container(
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padding: const EdgeInsets.all(12),
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margin: const EdgeInsets.symmetric(horizontal: 4),
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decoration: BoxDecoration(
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color: color.withOpacity(0.1),
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borderRadius: BorderRadius.circular(8),
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),
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child: Column(
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children: [
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Icon(icon, color: color, size: 24),
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const SizedBox(height: 8),
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Text(
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value,
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style: TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.bold,
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color: color,
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),
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),
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const SizedBox(height: 4),
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Text(
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label,
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey.shade600,
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),
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textAlign: TextAlign.center,
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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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