import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:manager_api_new/api.dart';
import 'package:mymuseum_visitapp/Models/visitContext.dart';
import 'package:mymuseum_visitapp/Models/AssistantResponse.dart';

class AiChatMessage {
  final String role;
  final String content;
  AiChatMessage({required this.role, required this.content});
  Map<String, dynamic> toJson() => {'role': role, 'content': content};
}

class AssistantService {
  final VisitAppContext visitAppContext;
  final List<AiChatMessage> history = [];

  AssistantService({required this.visitAppContext});

  Future<AssistantResponse> chat({
    required String message,
    String? configurationId,
  }) async {
    final baseUrl = visitAppContext.clientAPI.apiApi?.basePath ?? 'https://api.mymuseum.be';

    final body = {
      'message': message,
      'instanceId': visitAppContext.instanceId,
      'appType': 'Mobile',
      'configurationId': configurationId,
      'language': visitAppContext.language?.toUpperCase() ?? 'FR',
      'history': history.map((m) => m.toJson()).toList(),
    };

    final response = await http.post(
      Uri.parse('$baseUrl/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(AiChatMessage(role: 'user', content: message));
      history.add(AiChatMessage(role: 'assistant', content: result.reply));
      return result;
    } else {
      throw Exception('Erreur assistant: ${response.statusCode}');
    }
  }

  void clearHistory() => history.clear();
}