Add DeepSeek AI service integration

2026-03-27 17:48:58 +05:00
parent 0ff572548e
commit 26939984ad
3 changed files with 629 additions and 8 deletions
@@ -0,0 +1,375 @@
+import 'dart:convert';
+import 'package:http/http.dart' as http;
+import '../models/task_model.dart';
+
+class DeepSeekService {
+  final String? apiKey;
+  final String baseUrl = 'https://api.deepseek.com';
+
+  DeepSeekService({this.apiKey});
+
+  // Генерация подзадач из основной задачи
+  Future<List<Map<String, dynamic>>> generateSubtasks({
+    required String title,
+    required String description,
+  }) async {
+    if (apiKey == null || apiKey!.isEmpty) {
+      return _mockGenerateSubtasks(title, description);
+    }
+
+    try {
+      final response = await http.post(
+        Uri.parse('$baseUrl/v1/chat/completions'),
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': 'Bearer $apiKey',
+        },
+        body: jsonEncode({
+          'model': 'deepseek-chat',
+          'messages': [
+            {
+              'role': 'system',
+              'content': 'You are a task planning assistant. Break down tasks into logical subtasks. Return ONLY a JSON array.',
+            },
+            {
+              'role': 'user',
+              'content': 'Break down this task into 3-7 subtasks:\n\nTitle: $title\nDescription: $description\n\nReturn ONLY a JSON array with format: [{"title": "...", "estimatedHours": 0, "description": "..."}]',
+            },
+          ],
+          'temperature': 0.7,
+          'max_tokens': 2000,
+        }),
+      );
+
+      if (response.statusCode == 200) {
+        final data = jsonDecode(response.body);
+        final content = data['choices'][0]['message']['content'];
+        
+        // Извлекаем JSON из ответа
+        final jsonMatch = RegExp(r'\[.*\]', dotAll: true).firstMatch(content);
+        if (jsonMatch != null) {
+          final List<dynamic> subtasks = jsonDecode(jsonMatch.group(0)!);
+          return subtasks.cast<Map<String, dynamic>>();
+        }
+      } else {
+        print('DeepSeek API Error: ${response.statusCode} - ${response.body}');
+      }
+    } catch (e) {
+      print('DeepSeek Service Error: $e');
+    }
+
+    return _mockGenerateSubtasks(title, description);
+  }
+
+  // AI приоритизация задач
+  Future<TaskPriority> prioritizeTask({
+    required String title,
+    required String description,
+    DateTime? dueDate,
+  }) async {
+    if (apiKey == null || apiKey!.isEmpty) {
+      return _mockPrioritizeTask(dueDate);
+    }
+
+    try {
+      final response = await http.post(
+        Uri.parse('$baseUrl/v1/chat/completions'),
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': 'Bearer $apiKey',
+        },
+        body: jsonEncode({
+          'model': 'deepseek-chat',
+          'messages': [
+            {
+              'role': 'system',
+              'content': 'You are a task prioritization assistant. Determine task priority: low, medium, high, or urgent. Reply with ONE word only.',
+            },
+            {
+              'role': 'user',
+              'content': 'What priority should this task have?\n\nTitle: $title\nDescription: $description\nDue: ${dueDate ?? "Not specified"}\n\nReply with ONE word: low, medium, high, or urgent',
+            },
+          ],
+          'temperature': 0.3,
+          'max_tokens': 10,
+        }),
+      );
+
+      if (response.statusCode == 200) {
+        final data = jsonDecode(response.body);
+        final content = data['choices'][0]['message']['content'].trim().toLowerCase();
+        
+        switch (content) {
+          case 'urgent': return TaskPriority.urgent;
+          case 'high': return TaskPriority.high;
+          case 'low': return TaskPriority.low;
+          default: return TaskPriority.medium;
+        }
+      }
+    } catch (e) {
+      print('DeepSeek Service Error: $e');
+    }
+
+    return _mockPrioritizeTask(dueDate);
+  }
+
+  // Генерация описания задачи
+  Future<String> generateTaskDescription({
+    required String title,
+    String? context,
+  }) async {
+    if (apiKey == null || apiKey!.isEmpty) {
+      return 'Описание для задачи: $title';
+    }
+
+    try {
+      final response = await http.post(
+        Uri.parse('$baseUrl/v1/chat/completions'),
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': 'Bearer $apiKey',
+        },
+        body: jsonEncode({
+          'model': 'deepseek-chat',
+          'messages': [
+            {
+              'role': 'system',
+              'content': 'You are a task description writer. Write clear, concise task descriptions in Russian. Keep it under 100 words.',
+            },
+            {
+              'role': 'user',
+              'content': 'Write a brief description for this task:\n\nTitle: $title\nContext: ${context ?? "No additional context"}\n\nWrite in Russian.',
+            },
+          ],
+          'temperature': 0.5,
+          'max_tokens': 500,
+        }),
+      );
+
+      if (response.statusCode == 200) {
+        final data = jsonDecode(response.body);
+        return data['choices'][0]['message']['content'];
+      }
+    } catch (e) {
+      print('DeepSeek Service Error: $e');
+    }
+
+    return 'Описание для задачи: $title';
+  }
+
+  // Умное планирование - распределение задач по времени
+  Future<List<Map<String, dynamic>>> smartSchedule({
+    required List<TaskModel> tasks,
+    required DateTime startDate,
+    required DateTime endDate,
+    required int availableHoursPerDay,
+  }) async {
+    if (apiKey == null || apiKey!.isEmpty) {
+      return _mockSchedule(tasks, startDate, endDate, availableHoursPerDay);
+    }
+
+    try {
+      final tasksJson = tasks.map((t) => {
+        'title': t.title,
+        'estimatedHours': t.estimatedHours,
+        'priority': t.priority.name,
+        'dueDate': t.dueDate?.toIso8601String(),
+      }).toList();
+
+      final response = await http.post(
+        Uri.parse('$baseUrl/v1/chat/completions'),
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': 'Bearer $apiKey',
+        },
+        body: jsonEncode({
+          'model': 'deepseek-chat',
+          'messages': [
+            {
+              'role': 'system',
+              'content': 'You are a smart scheduling assistant. Distribute tasks across available days optimally. Return ONLY a JSON array.',
+            },
+            {
+              'role': 'user',
+              'content': '''
+Schedule these tasks optimally:
+${jsonEncode(tasksJson)}
+
+Available hours per day: $availableHoursPerDay
+Start date: ${startDate.toIso8601String()}
+End date: ${endDate.toIso8601String()}
+
+Return JSON array: [{"taskId": index, "date": "YYYY-MM-DD", "hours": 0}]
+''',
+            },
+          ],
+          'temperature': 0.5,
+          'max_tokens': 3000,
+        }),
+      );
+
+      if (response.statusCode == 200) {
+        final data = jsonDecode(response.body);
+        final content = data['choices'][0]['message']['content'];
+        
+        final jsonMatch = RegExp(r'\[.*\]', dotAll: true).firstMatch(content);
+        if (jsonMatch != null) {
+          final List<dynamic> schedule = jsonDecode(jsonMatch.group(0)!);
+          return schedule.map((s) {
+            return {
+              'taskId': s['taskId'],
+              'date': DateTime.parse(s['date']),
+              'hours': s['hours'],
+            };
+          }).toList();
+        }
+      }
+    } catch (e) {
+      print('DeepSeek Service Error: $e');
+    }
+
+    return _mockSchedule(tasks, startDate, endDate, availableHoursPerDay);
+  }
+
+  // AI анализ проекта - генерация mind-карты
+  Future<List<Map<String, dynamic>>> generateMindMap({
+    required String projectName,
+    required String description,
+  }) async {
+    if (apiKey == null || apiKey!.isEmpty) {
+      return _mockMindMap(projectName);
+    }
+
+    try {
+      final response = await http.post(
+        Uri.parse('$baseUrl/v1/chat/completions'),
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': 'Bearer $apiKey',
+        },
+        body: jsonEncode({
+          'model': 'deepseek-chat',
+          'messages': [
+            {
+              'role': 'system',
+              'content': 'You are a project structure assistant. Create a mind-map structure for projects. Return ONLY a JSON array of nodes.',
+            },
+            {
+              'role': 'user',
+              'content': '''
+Create a mind-map structure for this project:
+
+Project: $projectName
+Description: $description
+
+Return JSON array of nodes with format:
+[{"level": 0, "title": "Project Name", "parentId": null}, {"level": 1, "title": "Phase 1", "parentId": 0}, ...]
+''',
+            },
+          ],
+          'temperature': 0.7,
+          'max_tokens': 3000,
+        }),
+      );
+
+      if (response.statusCode == 200) {
+        final data = jsonDecode(response.body);
+        final content = data['choices'][0]['message']['content'];
+        
+        final jsonMatch = RegExp(r'\[.*\]', dotAll: true).firstMatch(content);
+        if (jsonMatch != null) {
+          final List<dynamic> nodes = jsonDecode(jsonMatch.group(0)!);
+          return nodes.cast<Map<String, dynamic>>();
+        }
+      }
+    } catch (e) {
+      print('DeepSeek Service Error: $e');
+    }
+
+    return _mockMindMap(projectName);
+  }
+
+  // Mock данные для тестирования
+  List<Map<String, dynamic>> _mockGenerateSubtasks(String title, String description) {
+    return [
+      {'title': 'Анализ требований', 'estimatedHours': 2, 'description': 'Изучить требования и документацию'},
+      {'title': 'Проектирование', 'estimatedHours': 3, 'description': 'Спроектировать архитектуру решения'},
+      {'title': 'Реализация', 'estimatedHours': 8, 'description': 'Написать код'},
+      {'title': 'Тестирование', 'estimatedHours': 3, 'description': 'Протестировать функциональность'},
+      {'title': 'Документирование', 'estimatedHours': 2, 'description': 'Создать документацию'},
+    ];
+  }
+
+  TaskPriority _mockPrioritizeTask(DateTime? dueDate) {
+    if (dueDate == null) return TaskPriority.medium;
+    
+    final daysUntilDue = dueDate.difference(DateTime.now()).inDays;
+    
+    if (daysUntilDue <= 1) return TaskPriority.urgent;
+    if (daysUntilDue <= 3) return TaskPriority.high;
+    if (daysUntilDue <= 7) return TaskPriority.medium;
+    return TaskPriority.low;
+  }
+
+  List<Map<String, dynamic>> _mockSchedule(
+    List<TaskModel> tasks,
+    DateTime startDate,
+    DateTime endDate,
+    int availableHoursPerDay,
+  ) {
+    final schedule = <Map<String, dynamic>>[];
+    var currentDate = startDate;
+    var remainingHours = availableHoursPerDay;
+
+    for (var i = 0; i < tasks.length; i++) {
+      if (currentDate.isAfter(endDate)) break;
+
+      final task = tasks[i];
+      if (task.estimatedHours <= remainingHours) {
+        schedule.add({
+          'taskId': i,
+          'date': currentDate,
+          'hours': task.estimatedHours,
+        });
+        remainingHours -= task.estimatedHours;
+      } else {
+        currentDate = currentDate.add(const Duration(days: 1));
+        remainingHours = availableHoursPerDay;
+        
+        if (currentDate.isAfter(endDate)) break;
+        
+        schedule.add({
+          'taskId': i,
+          'date': currentDate,
+          'hours': task.estimatedHours > remainingHours 
+              ? remainingHours 
+              : task.estimatedHours,
+        });
+      }
+    }
+
+    return schedule;
+  }
+
+  List<Map<String, dynamic>> _mockMindMap(String projectName) {
+    return [
+      {'level': 0, 'title': projectName, 'parentId': null},
+      {'level': 1, 'title': 'Планирование', 'parentId': 0},
+      {'level': 1, 'title': 'Разработка', 'parentId': 0},
+      {'level': 1, 'title': 'Тестирование', 'parentId': 0},
+      {'level': 1, 'title': 'Деплой', 'parentId': 0},
+      {'level': 2, 'title': 'Анализ', 'parentId': 1},
+      {'level': 2, 'title': 'Дизайн', 'parentId': 1},
+      {'level': 2, 'title': 'Frontend', 'parentId': 2},
+      {'level': 2, 'title': 'Backend', 'parentId': 2},
+      {'level': 2, 'title': 'Unit тесты', 'parentId': 3},
+      {'level': 2, 'title': 'E2E тесты', 'parentId': 3},
+    ];
+  }
+}
+
+// Глобальный экземпляр сервиса
+final deepSeekService = DeepSeekService(
+  // API ключ можно получить на https://platform.deepseek.com
+  apiKey: null, // Добавить ключ здесь или через .env
+);