import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:tablet_app/Models/tabletContext.dart';
import 'package:tablet_app/Models/AssistantResponse.dart';

class AssistantService {
  final TabletAppContext tabletAppContext;
  final List<Map<String, String>> _history = [];

  AssistantService({required this.tabletAppContext});

  Future<AssistantResponse> chat({required String message, String? configurationId}) async {
    final host = tabletAppContext.host ?? '';
    final instanceId = tabletAppContext.instanceId ?? '';
    final language = tabletAppContext.language ?? 'FR';

    _history.add({'role': 'user', 'content': message});

    final body = {
      'message': message,
      'instanceId': instanceId,
      'appType': 'Tablet',
      'configurationId': configurationId,
      'language': language,
      'history': _history.take(10).toList(),
    };

    final response = await http.post(
      Uri.parse('$host/api/ai/chat'),
      headers: {'Content-Type': 'application/json'},
      body: jsonEncode(body),
    );

    if (response.statusCode == 200) {
      final data = jsonDecode(response.body) as Map<String, dynamic>;
      final result = AssistantResponse.fromJson(data);
      _history.add({'role': 'assistant', 'content': result.reply});
      return result;
    } else {
      throw Exception('Assistant error: ${response.statusCode}');
    }
  }
}