import 'package:flutter/material.dart'; import 'package:ai_qa_app/core/theme.dart'; import 'package:ai_qa_app/routes/app_routes.dart'; void main() { runApp(const MyApp()); } class MyApp extends StatelessWidget { const MyApp({super.key}); @override Widget build(BuildContext context) { return MaterialApp( title: 'AI Q&A App', theme: appTheme, initialRoute: AppRoutes.home, routes: AppRoutes.routes, debugShowCheckedModeBanner: false, ); } } class AppConstants { static const String appName = 'AI Q&A App'; static const String geminiApiKey = 'AIzaSyDIUFxKJvgaX9ItCNp-EZ7FmtOgfyuCHY8'; static const String deepseekApiKey = 'sk-24aab533e04047219b2b7d14a6b2bd1c'; static const String geminiApiUrl = 'https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash:generateContent'; static const String deepseekApiUrl = 'https://api.deepseek.com/v1/chat/completions'; } import 'package:flutter/material.dart'; final ThemeData appTheme = ThemeData( colorScheme: ColorScheme.fromSeed( seedColor: Colors.blueAccent, brightness: Brightness.light, ), useMaterial3: true, appBarTheme: const AppBarTheme( centerTitle: true, elevation: 0, ), ); class Helpers { static String? validateInput(String? value) { if (value == null || value.isEmpty) { return 'Please enter some text'; } return null; } } class QuestionModel { final String question; final String answer; final String modelUsed; final DateTime timestamp; QuestionModel({ required this.question, required this.answer, required this.modelUsed, required this.timestamp, }); } import 'dart:convert'; import 'package:http/http.dart' as http; import 'package:ai_qa_app/core/constants.dart'; class ApiService { static Future askGemini(String question) async { final response = await http.post( Uri.parse('${AppConstants.geminiApiUrl}?key=${AppConstants.geminiApiKey}'), headers: {'Content-Type': 'application/json'}, body: jsonEncode({ 'contents': [ { 'parts': [ {'text': question} ] } ] }), ); if (response.statusCode == 200) { final data = jsonDecode(response.body); return data['candidates'][0]['content']['parts'][0]['text']; } else { throw Exception('Failed to get answer from Gemini'); } } static Future askDeepSeek(String question) async { final response = await http.post( Uri.parse(AppConstants.deepseekApiUrl), headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer ${AppConstants.deepseekApiKey}' }, body: jsonEncode({ 'model': 'deepseek-chat', 'messages': [ {'role': 'user', 'content': question} ] }), ); if (response.statusCode == 200) { final data = jsonDecode(response.body); return data['choices'][0]['message']['content']; } else { throw Exception('Failed to get answer from DeepSeek'); } } } import 'package:flutter/material.dart'; import 'package:ai_qa_app/widgets/custom_button.dart'; import 'package:ai_qa_app/routes/app_routes.dart'; class HomeView extends StatelessWidget { const HomeView({super.key}); @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: const Text('AI Q&A App'), ), body: Padding( padding: const EdgeInsets.all(16.0), child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ CustomButton( text: 'Ask a Question', onPressed: () => Navigator.pushNamed(context, AppRoutes.upload), ), const SizedBox(height: 20), CustomButton( text: 'View History', onPressed: () => Navigator.pushNamed(context, AppRoutes.documents), ), ], ), ), ); } } import 'package:flutter/material.dart'; import 'package:ai_qa_app/widgets/custom_button.dart'; import 'package:ai_qa_app/core/helpers.dart'; import 'package:ai_qa_app/services/api_service.dart'; class UploadView extends StatefulWidget { const UploadView({super.key}); @override State createState() => _UploadViewState(); } class _UploadViewState extends State { final _formKey = GlobalKey(); final _questionController = TextEditingController(); String? _selectedModel = 'gemini'; bool _isLoading = false; String? _answer; Future _submitQuestion() async { if (!_formKey.currentState!.validate()) return; setState(() { _isLoading = true; _answer = null; }); try { final answer = _selectedModel == 'gemini' ? await ApiService.askGemini(_questionController.text) : await ApiService.askDeepSeek(_questionController.text); setState(() { _answer = answer; }); } catch (e) { ScaffoldMessenger.of(context).showSnackBar( SnackBar(content: Text('Error: ${e.toString()}')), ); } finally { setState(() { _isLoading = false; }); } } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: const Text('Ask a Question'), ), body: Padding( padding: const EdgeInsets.all(16.0), child: Form( key: _formKey, child: Column( children: [ TextFormField( controller: _questionController, decoration: const InputDecoration( labelText: 'Enter your question', border: OutlineInputBorder(), ), maxLines: 5, validator: Helpers.validateInput, ), const SizedBox(height: 20), DropdownButtonFormField( value: _selectedModel, items: const [ DropdownMenuItem(value: 'gemini', child: Text('Gemini')), DropdownMenuItem(value: 'deepseek', child: Text('DeepSeek')), ], onChanged: (value) { setState(() { _selectedModel = value; }); }, decoration: const InputDecoration( labelText: 'Select AI Model', border: OutlineInputBorder(), ), ), const SizedBox(height: 20), CustomButton( text: 'Get Answer', onPressed: _isLoading ? null : _submitQuestion, ), if (_isLoading) const CircularProgressIndicator(), if (_answer != null) ...[ const SizedBox(height: 20), Text( 'Answer:', style: Theme.of(context).textTheme.titleLarge, ), const SizedBox(height: 10), Text(_answer!), ], ], ), ), ), ); } } import 'package:flutter/material.dart'; class DocumentsView extends StatelessWidget { const DocumentsView({super.key}); @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: const Text('Question History'), ), body: const Center( child: Text('Your question history will appear here'), ), ); } } import 'package:flutter/material.dart'; class CustomButton extends StatelessWidget { final String text; final VoidCallback? onPressed; const CustomButton({ super.key, required this.text, required this.onPressed, }); @override Widget build(BuildContext context) { return SizedBox( width: double.infinity, child: ElevatedButton( onPressed: onPressed, child: Text(text), ), ); } } class AppRoutes { static const String home = '/'; static const String upload = '/upload'; static const String documents = '/documents'; static final routes = { home: (context) => const HomeView(), upload: (context) => const UploadView(), documents: (context) => const DocumentsView(), }; } name: ai_qa_app description: An AI-powered question answering application. publish_to: 'none' version: 1.0.0+1 environment: sdk: '>=3.0.0 <4.0.0' dependencies: flutter: sdk: flutter http: ^1.1.0 cupertino_icons: ^1.0.2 dev_dependencies: flutter_test: sdk: flutter flutter_lints: ^2.0.0 flutter: uses-material-design: true assets: - assets/images/